16
Bulletin of the Geological survey of』Japan,voL35(7),P。315-330,1984 543.8 551.353 550.4(26。03) 丁恥㊧:D貴§誼量畳》磁恥聡藍》£A顧脳》A紀鯉§麗聡轟M:畷職麗㌶c臨麗戴麗 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 丁騰聡鱈臨融聡磁S皿⑪欝⑱A麗臨 Minako TERAsHIMA* TERAsHIMA,Minako(1984)Thedistributionofamino翫cids&ndm sediments丘om the Japan trench and slope area_β%JJ.(穿60」.S%γ∂。」ご脚π p。315-330。 A恥舘訟e重3Three muddy core samples丘om the Japan Trench and Slope amino acid and monosaccharide geochemistry。 The total carbon content ofthe cores ranges fピom O.86to2.16%an trend in the order of P83(Slope area),P84(Japan Trench),and P75 highest amount oforganic carbonin core P83maybedueto the materials and/or good preservation ofthem。 Amino acids and monosaccharides were separated and identi are358-2510μ9/9,and total monosaccharides are408-2330μ9/g re distribution of total amino acids and tota豆monosaccharides Huc in core P83(Slope area)。These fluctuation may be caused by diageneti mental changes。Both total amino acids and total monosacchari much higher than those ofcore P75,though both cores were taken The ratio ofD-alloisoleucine to L-isoleucine ofallsamplesf士om cor means that the core sediments are considercd to be ofrecent ages.On of core P75ranges O。02-0。38with an averageofO。17,suggesting the c those of core P84. Manykindsofaminoacids(20)andmonosaccharides(8)fbu もuggest that various types oforganisms might be source materials o 亘鵬置⑰魂盟麗量⑭聡 The survey covered the Japan and southem Kurile Trench and Slope areas has been carried out by the Geological Survey ofJapan in1976(HoNzA6哲α1.,1977)。Th酵studies of seismic reHection records and drilling along the Japan Trench transect,a part of Deep Sea Dri11ing Prqiect, International Phase of Ocean Drilling,have given much geological and geophysical infbrmation on the Japan Trench and near shore shelf area (VoN 豆uENE6渉α1。,五978)。These abundant data (:LuDwING6麺乙,1966,VoN HuENEθ麺」。,1978) have cleared the stratigraphical and geo一 *Geochemistry and Technical Service Department tectonical outlines of the Tren geochemical infbrmation on th theJapan Trench and Slope areas available to date. Protein and carbohydrate in ments m&y be broken down int monomers,such as amino acid saccharides,which can be inc the humic substances.Therefbr standingofalteration ofamino saccharides in sediments is clarifゾthe魚ctors which contro environment and the geochemic subsequent diagenesis. The purposes of the present (1) to investigate the distribut acids and monosaccharides i Trench an(i Slope are, (2) to cl&r 一315一

麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

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Page 1: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

Bulletin of the Geological survey of』Japan,voL35(7),P。315-330,1984 543.8  551.353  550.4(26。03)

丁恥㊧:D貴§誼量畳》磁恥聡藍》£A顧脳》A紀鯉§麗聡轟M:畷職麗㌶c臨麗戴麗

麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵

丁騰聡鱈臨融聡磁S皿⑪欝⑱A麗臨

Minako TERAsHIMA*

TERAsHIMA,Minako(1984)Thedistributionofamino翫cids&ndmonosaccharides indeepsea     sediments丘om the Japan trench and slope area_β%JJ.(穿60」.S%γ∂。」ご脚π,voL35(7),

     p。315-330。

A恥舘訟e重3Three muddy core samples丘om the Japan Trench and Slope area were studiedfbr

amino acid and monosaccharide geochemistry。

     The total carbon content ofthe cores ranges fピom O.86to2.16%and shows a decreasing

trend in the order of P83(Slope area),P84(Japan Trench),and P75(Japan Trench).The

highest amount oforganic carbonin core P83maybedueto theIargestcontributionoforganic

materials and/or good preservation ofthem。

     Amino acids and monosaccharides were separated and identi且ed.Total amino acids

are358-2510μ9/9,and total monosaccharides are408-2330μ9/g respectively.The vertical

distribution of total amino acids and tota豆monosaccharides Huctuates extremely,especi翫lly

in core P83(Slope area)。These fluctuation may be caused by diagenetic and/or p&leoenviron-

mental changes。Both total amino acids and total monosaccharides contents ofcore P84are

much higher than those ofcore P75,though both cores were taken fピom the Japan Trench.

The ratio ofD-alloisoleucine to L-isoleucine ofallsamplesf士om core P84is Iess thanO。05which

means that the core sediments are considercd to be ofrecent ages.On the other hand,the ratio

of core P75ranges O。02-0。38with an averageofO。17,suggesting the coresediments isolderth批n

those of core P84.

      Manykindsofaminoacids(20)andmonosaccharides(8)fbundinthedeepseasedimentsもuggest that various types oforganisms might be source materials ofthe organic constituents.

亘鵬置⑰魂盟麗量⑭聡

  The survey covered the Japan and southem

Kurile Trench and Slope areas has beencarried out by the Geological Survey ofJapan

in1976(HoNzA6哲α1.,1977)。Th酵studies of

seismic reHection records and drilling along

the Japan Trench transect,a part of Deep

Sea Dri11ing Prqiect, International Phase of

Ocean Drilling,have given much geological

and geophysical infbrmation on the Japan

Trench and near shore shelf area (VoN

豆uENE6渉α1。,五978)。These abundant data

(:LuDwING6麺乙,1966,VoN HuENEθ麺」。,1978)

have cleared the stratigraphical and geo一

*Geochemistry and Technical Service Department

tectonical outlines of the Trench。Very little

geochemical infbrmation on the sedimen電s in

theJapan Trench and Slope areas is,however,

available to date.

  Protein and carbohydrate in buried sedi-

ments m&y be broken down into component

monomers,such as amino acids and mono-

saccharides,which can be incorporated蓋nto

the humic substances.Therefbre,the under-

standingofalteration ofamino acid and mono-

saccharides in sediments is import&nt to

clarifゾthe魚ctors which control sed三mentary

environment and the geochemical process of

subsequent diagenesis.

  The purposes of the present study are:

(1) to investigate the distribution of&m五no

acids and monosaccharides in the Japa聡Trench an(i Slope are, (2) to cl&ri町 the.

一315一

Page 2: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

βz6Jl6諭z qブ♂hθ060Jogz診α」3z67びξアげ」のりαη,レわ」。35,ハ石o.7

甦塵薫

behavior of the organic compounds during

diagenesis,(3)to understand the environment

of sedimentation in the areas by means of

organic geochemistry。

  S認朧聖且es麗聡dl A聡題且翼量e麗亘M㊧曲⑪認

  The location and other descriptions of

samples are shown in Figs。1,2and Table L

The three muddy core samples studied were

collected with piston corer f妻om the Japan

Trench and Slope area in Apri1」’une,1976.

The core samples are mostly composed ofclay,

intercalating sand and tufflayers.The samples

analyzed in this study were only clay Iayers.

The wet muddy sediments were dried at700C

fbr8h and then,were ground by hand tools

to100mesh powder.

  Amino acids in the pulverized samplesΨere

extracted with6N HCI at l10QC fbr24hours.

The amino acid extractes were desalted,with

a Dowex50W column,then eluted withL5N NH40H。Amino ac五ds were analyzed as

o-phtalaldehyde derivatives with a I。C-3A

Shimazu high perfbrmance liquid chromato-

graph fitted with a fluorometer.This method

is more sensitive than the standard ninhydrin

method,although it does not detect secondary

amino acids,such as proline and hydroxyproline。When a marine sediments including a

standard amino acids mixture was desalted

and concentrated in this way,HPLC analysis

showed that the average amino acid recovery

was91%.  Monosaccharides in the powdered samples

were extracted with lN H2SO4at I100C fbr

8houres.Acid extracts were neutralized with

Ba(OH)2εmd desalted by passing through a

set of the three columns(both the upper and

thelowercolumnwere且11edwith:Dowex50Wand the middle was Duolite A-4,:DEGENs

6厩1.,1963).Monosaccharides were analyzed

as monoethanolamine derivatives with a ILC-

3A Shimazu high perfbrmance liguidchromatograph 且tted with a fluorometer.1)一fヒuctose,1』一arabinose and L-fhcose deriva-

tives have been quantiHed together as L-

arabinose, because they have overlapPing

peaks on the chromatogram。When a marinesediment extract including a standard mono-

saccharide mixture was desalted and con-

centrated in this way,HP:LC analysis showed

that the average monosaccharide recovery

was90%。  Total carbon was analyzed by a Kokusai

Electric I。R-Matic C-S V:K一皿AS analyzer

which is a simultaneous carbon-sulfUr auto-

maticanalyzer。

  Manganese and iron were determined by

atomicabsorpt圭onspectrometryusingaNipPonJarre1LAsh AA-781automatic absorption我ndHame emission spectrophotometer.

R㊧s魍且電s題聡想且》置§c魍ss量⑰聡

  The analytical results of the samples丘om

cores P83,P84and P75are presented in Table

2to7,respectively。Their vertical distributions

are shown in:Fig.3to10.

  c⑪聯⑱葺距83(s且⑰聖e題蜜e認)

  The total carbon,total am量no acids and

total monosaccharides contends ofthe samples

丘om core P83had ranges of L45-2.16%,

927-2510μ9/g and526-2330μ9/g respectively.

Their vertical distributions fluctuate extremely

with the exception of the total carbon.The

Table l Sampling locality,water depth,core length,area and sediments.

Station Sample     Position     DepthNo・    No・     Latitude Longitude    (m) Area

Corelength(cm) Sample

438

470

471

P75

P83

P84

36042.7,N I43。13.0/E

40Q40.7/N 142。47.0,E

40007.0’N144。21.9/E

7,300

1,650

7,330

Japan Trench

Off Hachinohe,

condnental slope

OfrK頗,JapanTrench

475

376

541

Clayintercalatingsandand tu牙layers。

Clay intercalating sandlayers.

Clay intercalating

tUHlaCeOUS Sand and Sandlayers。

一316一

Page 3: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

オ伽・面伽η4瀬・π・5α66hα蜴6吻.D卿3θαS6伽θ庸戸・編hθ」‘ψ伽7翫8η・hαπ4SJψ6肋α(乃泌h伽,M伽た・)

451

40

35

1400 1450 150。

45ETOROFU Is。

KUNASHIRlls、

oH◎KKAID◎  oρ夕

Sapporo KUShir

~G◎

謡ら◎。諺

Hakodate 揚炉  ≧ ◎o

o  ♂岬3

    鰯

  ○@ ~

Miyako♂

4

Sendai

Kamaish’   8   ド

8000・ 蝉

 ~

試~

糞,、  o

Q

窺画

箆  ⑨o

o0          200         400 m

o

140。

Fig.1

   145。

Sampling locality map・

total amino acids decrease gradually,but

irregularly with depth of b皿iaL The wide

Huctuation in the concentration of organic

constituents is likely to indicates the哩ualitative

variation of the supplied organic matteL On

the other hand,the smaller fluctuation of

total carbon may indicate the supply of con-

stant amounts organic materials.The highest

concentration of these organic constituents in

core P83show a large supply and/or good

150。

4σo

35。

preservation oforganic materials・

  The weight percentage ofacidic&mino acids

in the total amino acid mixture decreases

sharply fヒom the core top to l60cm depth.

Aspartic acid,1evels in particulur decrease

sharply倉om i3.2%at the top of the core to

O。4%at160cm depth,and remain low(L7to O.4%)at greater d,ep誌hs(Table3).It is

likely that the remarkable low concentra直on

of aspartic acid at depth in core P83suggests

一317一

蟻§

Page 4: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

βz〆」6あπ(~プ護h6060JogσαzJ S%π7¢リ(~プ」αψ‘zη,レbJ.35,ハ1b。7

巴    OxidatlonPart   一

□Clay

皿s直lt

㎜SandySllt

團Sand

慰Tuff

團    VolcanlC Sand

圏             し    PumiceScorla              ■

囹    Calclum

      Carbonate

1CoreLength   in mete『

P83

1

2

3

P84

3

5

P75

、一 -

鞍ま調 聯 1

一}陶』ρ_’ご  、 C

即』噂冒㌧ 2二:』

  』-「

二臨ハ

3

購 一

》》  ’

》》》V》

VW罹一脾一

i表二=莞菰

二ご質=さ零二」

鳶ン⊇’《曜,~9

CalciumCarbonate

3

4

Fig。2 Columnar section ofpiston cores。

environment翫l changes such as Eh condition.  aspartic acid in the Slope area indicates that

Because it has been reported that the acidic the sediments of core P83were・deposited

amino acids degrade more rapidly under under oxidizing conditions。The minimumoxidizing conditions(NlssENBAuM6厩乙,1972, concentration of acidic amino acids at l60

SAsA斑,1973),the lower concentration of cm depth coincides with those of total amino

                                -318一

Page 5: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

トド

ig

/i葬

1曽の

1

Table2Amino acid composition,total carbon and Mn/Fe in core P83。

SampleDepth(cm)

112

245

382

4115

5160

6195

7232

8278

9315

10358

11

388

 A㎜趣⑰認c腿,臨s置c(輔%)

LysineOrnithineH:istidine

Arginine

1.4

1.3

4.1

8.4

7.0

6.3

1.8

2.9

5.9

0.7

2.4

7。5

6.4

1.8

2.5

8.1

1.9

0.8

3.1

9。7

7.1

0.8

2.9

9.3

6.9

1.9

2.5

10.8

8.4

2.4

2.6

8.1

8.4

2.3

3.6

8.3

8.2

2.2

2.6

7.9

9.0

1.5

2.5

8.2

 Ac量《髄c

Aspartic acid

Glutamic acid13.212.3

7.6

12.4

4.2

14.2

1.0

10.7

0.4

9.5

1.7

9.8

0.6

13.7

0.6

10.9

0.6

14.2

0.4

15.1

0.4

11.3

 麗y西響⑰xy

ThreonineSerine

7.3

7.1

7.0

5。9

7.8

7.3

8.3

4.9

8.7

3.9

7.5

4.0

7.5

5.8

7.3

6.1

7.7

5.9

6.6

5.6

6.9

5.0

 醤e誠職置

GlysineAlanineValine亙soleucine

Leucine

7.3

7.6

6.6

5.1

6.4

7.4

7.8

7.0,

5.1

6.9

8,9

9.1

7.8

5.7

7.6

11.98.9

9.1

6.3

8.3

11.07.9

10.77.8

10.5

9.6

7.7

9.5

6.6

8.7

7.5

8.2

8.2

6.4

8.3

10.89.0

7.6

5.6

7.5

7.0

9.0

7.9

5.8

7.7

9.4

9.0

7.9

5.7

7.8

9.6

8.7

8.6

6.4

8.8

 s謹哩

Methionine 0.4 0.3 0.3 0.9 0.4 0.4 0.2 1.0 0.6 十 0.1

 A置⑰職訊重量c

TyrosinePhenylalanine

2.6

5.3

2.2

10.2

2.5

5.6

3.2

5.2

3.6

7.8

4.8

6.6

2.4

6.2

2.2

5.4

2.3

3.2

2.3

5.3

2.5

6.0

 阿⑰脚騨醜e魎

α一aminobutyric ac圭dβ一a1毎nine

γ一a血nobutyric acid

D-alloisoleucineTotal(μ9/9)

   (μM/9)

0.1

1.3

1.9

0.3

246020.1

1.0

1.1

 十251020.5

1.2

1.3

234019.5

1.1

1.3

205017.3

0.8

1.5

134011.2

1.1

1.8

0.1

170013.9

1.2

1.7

9277.52

1.8

2.5

0.1

9788.25

2.3

3.2

131010.8

1.8

2.2

120010.1

1.8

2.6

0.1

11309.47

D一瓠10isoleucine/L-isoleucine

Total carbon(%) 1.88 2.16 2.14 2。08 1.81 1.45 1.77 1.69 2.03 2.10 2.11

Mn/Fe 0.012 0,011 0.011 0.011 0.012 0.015 0.012 0.012 0.012 0.OI1 0.11

」……

§o

』魯.

§に

さ蓉旨も

罫…ミ

§=.

bふ

警を

浄爲ミ§爵

誉ミ富

ミ§

§彗§に象愚ふ

迅還

具§

……

鳶ミ&

韓ミぎ)

Page 6: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

Table3Amino acid composition,total carbon and Mn/Fe in core P84。

SampleDepth(cm)

17

250

395

4130

5145

6187

7227

8267

9307

10347

11

38712

42713

477

 Amino acid,basic(幅%)

Lys         9。30m          1.2Hlis         2.2Arg         8.4

9.0

3.7

2.2

9.7

8.6

1.0

2.1

7.7

8.7

1.5

2.0

7.9

4.0

1.5

2.9

10.4

8.5

3.0

2.1

8.6

7.8

2.6

2.8

10.2

8.1

2.1

2.2

9.2

8.0

1.3

2.1

8.5

10.41.4

2.4

0.6

8.7

2.4

2.2

14.3

9.3

2.7

2.4

9.8

9.0

1.6

2.5

10.5

Acidl董c

AspGlu

0.3

14.0

6.3

10.6

0。2

11.6

4.7

11.4

1.6

13.6

0.9

12.1

5.1

10.811.2

11.0

10.811.7

7.7

12.7

6.1

8.4

7.9

9.7

4.7

9.7

 豆ydlroxy

ThrSer

8.7

8.4

7.3

5.3

7.8

6.0

7.5

6.2

8.2

6.3

8.0

5.1

6.8

7.5

6.5

5.4

6.5

6.4

8.0

6.2

6.7

5.6

7.0

4.8

7.3

5.0

1紹の

1

Ne醜臓1

GlyAlaValIleu

Leu

5.9

8.9

7.3

5.5

7.6

7.5

7.1

7.3

5.4

7.3

14.59.6

7.1

5.0

6.9

12.58。9

6.7

4.7

6.4

10.19.4

7.5

5.3

7.4

8。8

8.4

7.7

5.5

7.5

9.3

6。1

6.3

4.9

7.8

9.1

7.0

5.7

4.4

7.2

8.5

7.5

5.7

4.3

7.3

6.5

9.4

7.0

5.3

8.1

7.7

7.7

5.9

4.7

7.4

6.4

8.1

6.4

4.9

8.0

7.5

8.8

6.8

5.0

8。1

馳ミ謄嵩.

駄きも

osへ鵡ミo

防ミ

ミ噂

ミ§

N

s罷翻論野

Met 0.9 1.3 0.6 0.6 0.1 1.1 1.2 1.1 1.2 1.5 1.3 1.2 0.9

A騰職a髄cTyrPhe

2.2

5.7

1.9

5。2

2.0

5.0

1.9

4.6

2.1

5.5

2.1

5.5

1.9

4.7

1.8

4.3

1.8

4.3

2.0

5.5

1.8

4.4

1.7

4.8

1.8

4.9

 N⑰鵡面欝躍o宣e量脇

α一ABA

β一Ala

γ一ABA

A至艶uTota1(μ9/9)

   (μM/9)

1.7

1.8

131010.7

1.3

1.4

6084.94

2.3

1.9

115010.1

2.1

1.7

10709.20

2.1

2.0

7836.60

2.9

2.1

122010.0

1.8

2.4

119010.0

1.6

2.1

10708.81

1.9

2.2

12009.92

2.3

3.0

8056.76

2.0

2.6

7575.89

1.9

2.9

7285.93

2.7

3.2

6545.41

Alleu/Ileu

Total C.(%) 1.35 1.00 L26 1.26 1.16 1.18 1.19 1.20 1.56 1.31 1.20 1.17 1.05

Mn/Fe 0。Ol2 0.013 0.013 0.011 0.012 0.012 0.012 0.012 0.012 0.013 0.013 0.013 0.014

Page 7: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

オ物・オ励αη4酒4・η・sα66hα蜴θ吻.0吻36αS読物6π孟ψo履hθ」α卿7㍗6η6hαn4SJ・μオ繊(7初5hぎ勉α,餓繍・)

Table4Amino acid composition,total carbon and Mn/Fe in core P75。

Sample

Depth(cm)

18

238

372

4106

5   6   7   8140     188     230    278

9308

10

436

 Am量髄o魚c量壺,恥題s童c(w苞%)

Lys       7.8  8.20rn                1.4     1.6

】ヨ【is                1.9     1.8

Arg           6。1   4.1

8.0

1.7

1.9

8.5

6.9

1.2

1.7

3.9

8.2

2.2

2.1

5.4

6.9

2.3

1.7

5.3

7.0

1.8

1.6

5.8

7.8

1.6

1.6

4.5

11.0

1.5

1.5

6.8

8.1

2.2

1.7

6.1

 Ae量心量¢

Asp

Glu

9.5     3.7     2.4     1.1

12.2    14.4    11.4    13.7

6.6     2.8     9.9     7.0

12.2    15.0    10.8    10.2

2.4

4.5

9.6

12.1

 麗y西躍⑰xy

ThrSer

7.8     7.7     8.2     6.3

5.0     4.9     4.0     5.2

6.8     7.7     6.0     6.6

3.6     4.4     4.5     3.8

6.7

2.0

6.5

4.3

 N’㊧睡臓置

Gly

Ala

Val

neu

Leu

5.6

8.3

8.5

5.4

8.0

5.8

9.7

9.1

7.1

9.7

6.2

7.7

9.9

7.1

10.4

8.2

7.0

8.5

7.2

10.3

3.9

6.6

7.4

7.3

11.0

4.6

8.0

8.1

6.4

10.1

5.9

8.0

6.1

6.2

6.7

4.1

6.8

7.7

8.1

9.2

6.3

5.8

9.9

9.1

10.9

3.4

7.0

7.4

6.9

8。4

 s麗盟聡冒

Met 0.2 0.2 0.3 5.5 0.5 0.5 0.5 0.2 0.3

 A騰m麓量¢

Tyr

Phe

2.0  1.6

5.7  4.5

1.5

6.0

1.4

5.4

2.8

5.5

1.4     3.0     5.5

5.6     6.3     7.3

5.3

9.0

2.7

6.9

 N’⑪脚騨醜e臨

α。ABA

β一Ala

γ一ABA

Alleu

Total(μ9/9)

   (μM/9)

2.1

2.4

0.1

485

3.96

2.5

2。8

0.6

751

6.22

2.0

2.6

0.2

507

4.13

2.3

3.4

0.8

457

3.79

0.3

2.1

3.5

1.9

702

5.60

1.7

2.5

4.1

0.8

537

4.37

0.6

3.6

3.3

2.3

391

3.20

0.1

2.7

2,7

2.5

713

5.68

2.7

2.6

1.9

358

2.86

2.5

2.6

1.3

408

3.24

Alleu/11eu 0.021   0.085   0.022   0.114   0.261   0.127   0.372   0.304   0.207   0.195

TotalC。(%) 1.20    1.13    1.20    1.13 1.10    0.96    0.86    0.97 0.97 0.99

Mn/Fe 0.018   0.014   0.016   0.016   0.017   0.014   0.015   0.016   0.014   0.014

acids and also those of total monosaccharides.

Conversely,the ratio of neutral amino acids

to total amino acids shows a increasing trend

倉om the sediment sur魚ce to160cm depth。

 The weight percentage of Xylose in the

total monosaccharide mixture of core P83is higher than those in the other cores。The

vertical distribution  of ind圭vidual mono一

saccharide in core P83,especially galactose

and glucose shows irregular variation.This

魚ct seems to suggest that change of organic

source materials and/or diagenetic changes

occurred in this area。

 《】⑪置㊧聖竈盛(」題欝題聡丁欝e既¢ぬ)

 The total carbon, total amino acids and

total monosaccharides in core P84 have

一321一

Page 8: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

βz6JJ6あπ(~プ孟h6060Jogσ6α」5μ70(グgプ」;αψαη,レbJ.35,ハ7b。7

Table5Monosaccharide composition in core P83.

SampleDepth(cm)

112

245

382

4115

5160

6195

7232

8278

9315

10358

11

388

 Mo鵡⑪s題cc臨翻es(櫨%)

Rhamnose         7.2

Ribose                1。3

Mamose       12.OArabinose         16.6

Galactose         31.3

Xylose          15.6

Glucose              16。O

Total(μ9/9)        2330

6.9    9.2    9.5    4.2    8.1

1.2    2.3    2.4    2.6    1.3

12.1    9.2    9.9    5.6   11.6

18.2   19.9   19.4   22.8   19.0

24.5   33.6   31.0   40.8   35.0

13.9   14.5   14.5   17.9   11.3

23.2   11.3   13.3    6。1   13.7

762   1150   1190    526   1560

9.9    8.7    9.4   10.9    7.6

4.7 4.0 十  1.4 1.211.2   13.0   10.2   10.1   12.1

19.8   18.2   14.8   16.9   17.1

29.4   29.9   32.5   35.7   31.0

14.1   12.6   13.1   12.4   12.6

10.9   13.6   20.0   12.6   18.5

2305   1780    808   1040    735

Table6Monosaccharide composition in core P84。

SampleDepth(cm)

17

250

395

4  5  6130   145   187 789101112227   267   307   347   387   427

13

477

 踊⑪聡⑳舩e¢臨棚es(櫨%)

Rhamnose       12.2

Ribose               O.9

Mannose       l2.OArabinose            17.5

Galactose              29.7

Xylose          14.7

Glucose             13.O

Tota1(μ9/9)    775

5.0

1.2

11.2

22.8

32.2

11.0

16.4

593

7.6   8.9   8.6   8.9   9.2

十  1.4 1.1 1.1 1.7

11.2  12.9  10.1  10.3  12.8

16.0  20.8  19.0  17.3  20.7

27.1  29.5  31.8  31.9  29.4

10.6   9.5  11.2  12.0   7.7

27.5  17.0  18.2  18.4  18.4

408  1120  1200  1190   901

9.1   8.6   9.2   8.8   9.1

4.4   3.5   3.4   3.8   3。1

13.0  12.5  11.6  14.1  12.2

20.8  21.8  20.2  20.4  22.0

25.2  27.4  26.6  26.9  27.0

11.4  11.7  12.8  10.8  11.7

16。1  14.5  16.2  15.2  14.9

1320  1120   798  1540  1100

7.9

2.9

11.6

24.2

27.3

11.5

14.6

951

Table7Monosaccharide composition in core P75.

SampleDepth(cm)

18

238

372

4106

5140

6188

7230

8278

9308

10346

踊⑪鵬關c磯躍量組es(輔%)

RhamnoseRibose

MannoseArabinose

Galactose

Xylose

Glucose

Total(μ9/9)

6.8

1.3

12.3

15.9

28.6

10.3

24.7

682

5.2

0.9

10.4

19.1

32.5

9.8

22.1

504

2.6

0.9

10.7

19.7

30.3

9.8

25.9

497

7.3

9.4

17.7

29.1

11.4

25.1

518

9.1

0.6

9.3

15.7

27.2

11.4

26.7

421

7.4

0.9

9.8

15.0

35.6

8.8

22.4

551

8.8

2.2

10.4

27.0

22.7

11.2

17.7

619

7.4

1.7

9.4

25.2

31.2

8.2

16.9

947

11.6

2.0

10.2

26.1

24.5

11.4

14.1

874

10.6

2.0

11.9

27.0

21.9

10.4

16.1

879

ranges of Loo-L56%。 608-1310μ9/g an(i

408-1540μ9/9, respect三vely. The concentra-

tion of total carbon in core P84are almost

one-half of those in core P83.:Both total

amino acids and tot我l monosaccharides in

core P84are higher than reported fbr deep

sea sediments(DEGENs6如」。,1964,AlzENsHTAT

伽」.,1973).

 The vertical distribution of basic amino

acids and ac三dic amino acids changes abruptly.

Especially,the weight percentage of aspartic

acid is relatively low and Huctuates ffom O。2

to6。3%in the upper half of the co℃e。From

these data poor preservation of aspartic acid

一322一

Page 9: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

肋吻オ6曲αη4ハ4・η・5α66hα肋吻1)吻S6α364冨鵠θ濡ラ・瞬h6」伽π7伽6h翻S妙躍繊(7初εh加α,翅磁o)

2.5

2,0

陽1.5

1。0

0.5

0

齢・餓、

賊、

翰、、

P83

亀’竃            t5ヤ

 ’  璽

翻、 ρ碗  鳴   、 ,

   翻躍      1・o

0.5

0

P84

、       畷   9 ,    一  ’    ヤ ノ  ,  翻

  璽

冨 、、

、臥風、甥

1.5

覧1。0

0.5

0

P75

⑳・噌一一Amino acid

O-Monosaccharide

、飼、  取 、    ノ  、

   ’、薗

,璽

, 、

’   、

冨㊥

100   200   300   400           100   200   300   400   500           100   200

   Depth cm                 Depth cm                  Depth

    Fig。3 Vertical distribution oftotal amino acids and total monosacch我rides.

300  400cm

Mn咋e

O.02

0,01

0

T,C

3.O

OO

2.0

1.0

P83

Mn/Fe

O.Q2

①一{』⑳↓Φ       0.Ol.

0

T.C

3,0

0/o

2.O

1.O

P84

M%e

O.02

     0.01’、◎

0    100   200   300  400

   Depth cm

0 100  200

Depth cm

300  400  5000

T,C

3.0

2.0

1.0

P75

面へ艶 ⑳

  Total C

・袖一O 100   200   300

Depth cm

Fig・4vertical distribution oftotal carbon and Mn/Fe。

is expected under an aerob玉c condition.

 The weight percentage of galactose in the

total monosaccharides in core P84is lower

than those fbund in core P83.Glucose shows

extremely high values at lOO cm depth of

burial.

 c⑪騰酔75(恥P踵丁置錨醐 The total carbon,total amino acids and

total monosaccharides in core P75haveranges of o・86-L20%,358-751μ9/g and421-

947μg/g respectively.These values are the

lowest among the three cores.Such lowvalues may be due to:(a)a small amount of

organic material was supplied,because the

site of the core was situated in the outside of

the Japan Trench, (b) a Iarge part of the

original amino acids at the time ofsedimenta-

tion might h&ve been lost during diagenesis.

The total amino acids in core P75Huctuate

considerably,but show a decreasing trend

with depth.On the other hand,the total

monosaccharides increase with depth,resulting

in the reverse relation of the total amino

acids to the total monosaccharides between

upper and lower part ofthe core(Fig。3)。

 As shown in Table4,amino acid composi-

tion of core P75 is characterized by a fairly

low concentration of basic amino acids and

a little higher concentration of acidic amino

acids,when compared with other coresFurthermore,the weight percentage ofaspartic

acid in the total am圭no acids Huctuate ex_

tremely。Aromatic amino acids shows aprogressive increasing trend with depth。Hydroxy amino acids decreases slightly with

depth。The weight percentage of non-protein

amino acids in the total amino acids in core

P75is twice as great as in the other cores.

Non-protein amino acids which have been島und in deep sea core sediments areα一alanine,

一323一

Page 10: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

B駕JJ6あπqプ∫h8080Jog乞αzZ Sz470夢げ」ψαη,レbJ.35,ハアb.7

50(%)

40

30

20

10

0

30(%)

20

10

0

P83

△   !

 、漁!

垂’一△・、//     ・愈!

Neutra1

㌔/プ

Basic.

奔一一▲一一協/^一・漁.論

/V。_艶一 

50(%)

40

30

20

10

0

30(%)

20

Vcldlc

    Ar。matiC 、/

著0

0

P84

Neutra1

1\。 ノ

   100    200    300    400      Depth  (cm)

Vertical distribution of amino acids in core

                   企                   べ        Basic        ’・                  ノ  ¥▲__遮 ノムヤ         ノムヤ        ノ▲!¥遮一一▲/ポ ’^一一^ ’      込ノ         ¥  ’                ¥¥ ’                 〆

           Non-protein

。ア\).。ρ〈一・∀併〇一。一〇

            へ  て 

            Aromatうc

Fig。6

 P84.

  100    200     300    400     500

        Depth(cm)

Vertical distribution of amino acids in core

0

Fig。5

 P83.

β一al&nine, α一aminobutyric acid, γ・amino-

butyric acid and D-alloisoleucine.Dif驚rent

sources 長)r non-protein amino acids have

been considered五nc1賜ding:terrestrial organic

materials(SAsA照,1973),microbial metabolic

products(DEGENs6♂α」.,1964,IT亙H:ARA,1972)

a鞭d diagenetic product(VALLENT1NE,1964).

It 五as been reported that D-alloisoleucine

is diagenetic product of:L-isoleucine (VALL-

ENTINE,1964).D-alloisoleucine1n core:P75

is more concentrated than that in the other

cores。As shown in Fig。l l,the mtio of D-

alloisoleucine to:L-isoleucine in core P75shows

apronouncedincreasingtrend丘omthesu曲ceto230cm depth。This trend suggests thatdiagenesic production ofD-alloisoleucine fヒom

I。一isoleucine has occurred.

 The weight percentage of arabinose(plus

丘uctose and釦cose)in the total monosac-

chεしrides increases sharply at 230cm depth

of core P75and remains high to bottom of

the core。The weight percentage of glucose

in the total monosaccharides in core P75is

h玉gher than that in other cores anddecreases

gradually fヒom188cm depth to the bottomof the core.The relatively high concentration

ofglucose in this core may be p翫rtly due to a

large supply of such organic material&nd

partly due to slow degradation ofglucose.

一324一

Page 11: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

編η・浸6耽副躍・π・5α‘‘hα蜴85ゴπZ)卿36αS6漉雁鳩!レ・彫ぬ多」卿η乃8η‘加η4S嬢肋α(乃名α5h励α,掘轍・)

50(%)

40

30

20

10

0

30(%)

20

10

0

P75

        Neutra1

警一\ノ\

       Bas4c                   A   み                  ヤ   ノ¥                  !  \

蕊、!¥ 叙    1 盈 ・〆 ¥ / 9一蒔一血一一.壷’      ヤノ

.~端計一

30(%)

20

10

O

50(%)

40

▽cidlc/へか磁※...、

~/醸一欝

     Aromatic

30

20

10

 0      100     200     300     400

          Depth(cm)

Fig。7 Vertical distribution of amino acids in core

 P75.

O

P83

   Arabinose + Fucose + Fructose

Rlboseノ〉

\GalaCt,se

△\

   亀  ’ 、

 ノ  ヤ

轡、Glucose

齪膿・、,・冬

×一一x1一 ¥、!x

    傘、傘

   !      ヘ  ノ

,  》    ロ、膏’   ・×

Rhamnose

 臨密磯纒⑱就⑰麗曜⑪§赫⑪聰躍組 麗磯騰聡量麗晶⑰聡

 The concentration of total carbon,total

amino acids &nd total monosaccharidesdecrease倉om core:P83(Slope are乱),to core

P84 (Japan Trench)to core :P75 (Japan

Trench〉。As mentioned befbre,the h1ghestlevel of total carbon in core P83may be due

t・alargequantity・forganicmaterialssupplied.Among the core fヒom the Japan

        100      200     300     400

Fig。8 Vertical distribution of monosaccharides in

 core P83.

Trench,core P84 showed generally higher

total carbon content than core P75.Water

depth at the drilling sites of P84 a蝕d P75

(7300and7330m respectively)was notapPreciably di銑rent。 S五te P84 is loc&ted at

the inner sid,e of the Japan Trench,while site

P75situated at the outside ofit(F蓋9.1).

 As shown in Fig。4and Table2to4,theratio ofMn to Fe(Mn/Fe)in cores P75,P83

and P84varied in the ranges of O.014-0.Ol8,

0.011-0.Ol5and O.Olレ0。Ol4respectively.The

ratio of Mn to Fe in core:P75was the highest

一325一

Page 12: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

懸融這庚監臣ミ

βz4」8あη(ゾ広hθσ60Jog∫6‘zJ3z4πノ砂(ゾ」ψαη,レioJ.35,飾.7

30(%)

20

10

O

50(%)

40一

30

20

10一

0

P84

Arablnose + Fucose +   Fγ』uctose

食¥盗、盈禽峨、Xy1窒§一血’㌔  

      輝   ・蚕

Ri、bose

40(%)

30

20

10

    Galactose

〈♂『\〈_..    1 、、

   ,   も   Glucose      ヤ

  、  ノ    Rhamnose  X’

0

40

(%)

30

P75

Arablnose+Fucose

 +Fructose

    1金一一愈一念・盈ゴ   ¥

RIbose

  Xyrose   遜\ 、盛一盆漁/   窟

20

 0      100     200     300     400     500              Depth  (cm)

Fig.9 Vertical distribution of monosaccharidcs in

 core P84.

in average among the three cores,the mean

value of the臓tio in core P83was similar to

that of P84。According to KEITH and DEGENs

(1959)Mn/Fe is usefull as a criterion to

distinguish ma血e sediments fヒom fヒesh ones。

SuGlsAKI(1980)determined Mn content inthe marine sediments f士om the shelf of the

Japan Islands and concluded that Mn con-

tent incre我ses with increasing distance f士om

land.The re1乱tion ofMn/Fe to the distance of

sampling site f}om land seems to be supPorted

by the geologibal observation that core P75

contains a larger amount ofpelagic sediments

than corc P84.

  As mentioned latter,it is conceivable that

the sediments in core P75may be older th我n

10

Galactose

   愚、!\

轡 轡 織    Glucose    、

              ぺ              命一轍 癖

                    ’轡-

×、    ×!   暫    、x

  薯  /   \×!Rhamn・se

         100  200  30q  400              Depth(cm)

Fig。10 Vertical distribution of monosaccharides in

 core P75.

at a corresponding depth in core P84, as

suggested by the D-alloisoleucine and 亙』一

isoleucine data.The main reasons鉛r the low

total organic content of core P75compared

to core P84are considered to be3a large part

of the original organic materials deposited at

the time ofsedimentation might be lost during

diagenesis。

 The vertical distributions of total anオno

acids,total monosacchar玉des,individual amino

一326一

Page 13: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

パ吻・遡励απ4M・η・5α60hα7蜘∫η.0卿S6α36漉魏6π♂ψ・瞬hθ」卿n7伽6h副3勿6肋α(7セ郷h珈α,M吻ん・)

8,0

4.O

O

8。O

4。0

0

8。O

4.0

0

0.4

0.2

0  0     100     200    300    400    500                Dep曾h(cm)

Fig.11 Vertical distribution of non-protein amino

 乱cidsandAIleu!lleu.

P83

Non-proteinamino acids

P84

P75

D

鰍嚇一難

4 P75O

AIleuイleu O O

2 O O          O     OO

Q  O

acid and monosaccharide Huc搬ate extremely。

In particular,the fluctuation of aspartic.acid

may be due to a change of sedimentary

environment,because the amino我cid islikely to be sensitiv!e to oxidizing conditions.

Among these three cores the vertical dis-

tributions of total amino acids and total

monosaccharides change most irregularly in

core P83.As shown in Fig。3,the fluctuation

of total amino acids does not coincide with

that of total monosaccharides.The large

且uctuation with depth and the dif驚rent

manner in the Huctuation ofamino acids and

monosaccharides seem to suggest a signi丘cant

variation in the supplied organic materials

which might be caused by the changes on

physical conditions such as sea leve1, 10cal

current,incline ofsea bottom and so on.

  In the lowermost sections of.cores f}om

theJapan Trench,total monos我ccharides were

more abundant than total amino acids,sug-

gesting the stability of monosaccharides when

compared with amino acids.HANDA(1974)

has studied the200m dri11ing core f妻om

Biwa Lake and calculated the decomposition

constant of amino acids and monosaccharides

as O。48×10-6/y and O.36×10-6/y, respec-

tively。According to these data,the incre&sing

trend in the ratio of monosaccharides to

amino acids with depth could be interpreted

in terms of ageing of sediments and the

relative stability of the organic species.How-

ever,one could not dleny a possibility th翫t

monosaccharides were originally supplied more

abundant than amino acids.

  s⑱聰置c㊧⑪ぜ⑪置9麗聡量¢職麗重⑬罵量題且s

  About20kinds of amino acids and8kindsof monosaccharides were universally detected

登om the core sediments of deep sea drillings,

indicating that source materials of such

organic constituents are various and com-

plicated。Usually protein amino acids areubiquitous in all sorts of living materials。

Conversely polysaccharides are usually com-

posed of a fヒw types of monosaccharides(fbr

example,cellulose is mainly composed ofglucose,galact&nischieflycomposedgalactose).

Therefbre,it was expected that the dif琵ren電

monosaccharide composition would be ob-served between the Japan Trench and Slope

area,and that m勾or source fbr monosac-

charides in deep sea sediments could be

estimated fヒom the composition of mono-

saccharides。However,the compositions of

monosaccharides at the two deep sea sites

were simi1我r as shown in Figs。8-10,suggesting

that many kinds of source materials fbr the

monosaccharides would be considered.Fur-

thermore,the activity of microorganisms

cannot be ignored,RoGERs(1969)concludedthat the variety&nd amount ofpolys&ccharides

demonstrate the importances of microorga一

一327一

Page 14: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

B%Jl6あηげ♂h6060Jog乞6α」5zびびのgプ」のりαη,1VioJ.35,ハb。7

nisms in altering the polysaccharide f}action

prior to stabilization and preservation within

the sediments.Appreciable amounts of non-

protein am三no acids were present in the deep

sea core sediments,indicating that micro-

organisms play an important role in decom-

position of organic materials, becauseβ一

alanine,γ一aminobutyric acid and ornithine

may be microbial metabolic products(DEGENs

6渉α1。,1964,ITIHARA,亙972).

  Glucose was one of a abundant monosac-

charide throughout the three cores.It is well

known that glucose is a main constituent of

cellulose and laminaran.According to several

investigations SwAIN and BRATT,1972,HANDA

and MlzuNo, 1973), 91ucose 孟s the most

prominent constituent in the monosaccharides

which fbund in the recent sediments.In the

sediments fヒom the Japan Trench and slope

area,glucose was not the most abundant

monosaccharide。The data ofthis study camot

be compared with the data of other deep sea

sediments,because of1玉ttle infbrmation on

the monosaccharides in pelagic or semipelagic

sediments.However,the monosaccharide com-

position in the sediments ofthe Japan Trench

and Slope area are characterized by the

highest concentration of galactose.Galactose

五s a prominent component of the algal poly-

saccahrides, agar and calagenan。 Fructose

has been fbund in the storage polysaccharides

of cereals.It has not been known whether

倉uctose exists as a component of structural

polysaccharides or not.Arabinose has been

fbund in the hemicellulose of land plant and

gums and mucilaginous polysaccharides。Fucose is a component of血coisine in the

brown algae』BoHM6麺1。(1980)have reported

that fUcose is a prominent component in the

brown algea and coraL Therefbre,fhcose and

arabinose are probably present in the deep sea

sediments.

  丁畳麗う蜜題電蚤⑱⑪置置》国題盟⑪置s⑪亘e魍c最聡㊧重⑰

  L四置s⑰且e聡¢量臨鐙

  WHEMILLER & HARE (1971) have inves-

tigated calcareous deep sea sediments in

dr皿ing cores,in which the ratio of D-alloisoleucine to亙』一isoleucine increased steadily

with depth of buria1.The ratio of about O.25

was calculated to be correspond to approxi-

mately400,000years at a temperature rangeof’2.2to4.0。C.

  As shown in Table2and3,in the sediments

of cores P83and P84the ratio was usuallyless than O.05,while the ratio in the sediments

of the core P75were relat圭vely high(0,37-

0。02)and increased with depth(see Table4

and Fig.l l).The highest values(0。37)of the

ratio我t the230cm depth fヒom surface of the

P75 site would suggest that the sediment

below that depth may be older than400,000

years if the environmental conditions of core

P75were similar to those of calcareous deep

seasediments studiedbyWEHMILLER&HARE.

c⑪聡c且魍電量⑪盟

  The study was perfbrmed to examine the

distribution and nature oftotal carbon,amino

acids,monosaccharides,Mn and Fe in the

deep sea sediments of the Japan Trench and

Slope area.The results are summerized as

fbllows.

  (1) The amounts of total carbon,total

amino acids and total monosaccharides in.

crease in the order cores P75, P84 (Japan

Trench) core P83(Slope area)。The high

amountof・rganicmaterialsinc・reP83maybe due to input of a Iarge amount of organic

supPly, because the situation of core P83is

the nearest to land among the three cores.By

comparison the organic constituents,Mn/Fe

ratio and D-alleu/Liso ratio between two

Japan Trench cores,there are the fbllowing

dif驚rences: (a) the sediments of core P84

which is located in the inner side of the Japan

Trench contain a larger amount of organic

materials than those of core P75,and are of

recent age,(b)on the contrary,the sediments

of core:P75which is situated in the outer side

oftheJapan Trench are pelagic sediments and

older than those of core P84,therefbre a large

part of the original organic materials deposited

at the time ofsedimentation might have been

lost during diagenesis.

  (2) Generally,the vertical distribution of

total carbon,total amino acids,and total

monosaccharides Huctuate extremely.Espe一

一328一

Page 15: 麓:D㊧曜S㈱S醐脇鯉電§盤⑪聡電h輔聯鍵 - …behavior of the organic compounds during diagenesis,(3)to understand the environment of sedimentation in the areas

週伽oオ6傭αη4〃1・η・5α66hα蜴6卿.D卿S64S64茗挽諮ノン・煽hθ」吻η乃6η6h副SJ・ρθ肋α(7セ7α3h轍,〃吻んo)

cially,this tendancy is observed in core P83

(Slope area),and also in the composition of

some amino acids and monosaccharides.This

魚ct seems to suggest that some significant

change af驚cted the organic compositions have

occured in this area,especially in the Slope

area.

 (3)Many kinds of amino acids andmonosaccharides have been fbund in the deep

sea sediments。This魚ct seems to suggest that

sources of organic constituents in the deep sea

sediments are fヒom various organisms。Onthe other hand,the role of bacteria should

not be overlooked, because of existing ap-

preciable amounts ofnon-protein amino acids

which are probably produced by microbial

metabolisms.

 Galactose is the most abundant monosac-

charide throughout the core sediments of the

Japan Trench and Slope area,。Concemingmonosaccharides,we need the more in{brma-

tion about thc distribution and behaviour in

variOUS enVirOnmentS.

 (4) In the Japan Trench the ratio of D-

alloisoleucine to L_isoleucine in core P75

indicates relatively high values,but the ratio

in core P84does not show such high values.

These observations make it possible to suggest

that the sediments ofcore P75are older than

those of core P84which are of recent age。

Judging ffom the distribution of organic con-

stituents and Mn/Fe,it is conceivable that the

sediments of core P75 and P84in the Japa,n

Trench have been suhiected to be dif驚rent

丘om each other diagenetica11y and environ-

mentally。

Ac跳聡⑰脚且e《温g㊧騒⑬誠s31would like to thank

Dr.E.HoNzA and Mr.H.YoNETANI whopresented the samples.I am gratefUI to Dr.

S.ITo fbr helpfUI suggestion and a critical

reading of the manuscript。I would also like

to thank Dr E.HoNzA fbr valuable criticisms

and suggestions。

聡e露麗e血ces

AlzENsHTAT,Z.,BAEDEGKER,M.J.and KApIAN,1.R。

    (1973) Distribution and diagenesis of organic

    compounds in JOIDES Sediments from Gulf

    of Mexico and Westem Atlantic.G606h伽.

    σ05ηzo6h動z.∠16如,vo1.37,P.1881-1898.

BoHM,:L.,DAwsoN,R.,LIEBEzEIT,T.and WEFER,G。

    (1980) Suitability of monosaccharides as

    markers£or particle identification in carbonate

    sediments.Sθ伽π6物Jogフ,voL27,p。167-177.

DEGENs,E.T.,REuTER,」.Hl.and SHAw,K N。F。

    (1963) Analytical techniques in the field of

    organic geochemistry.In:U。CoLoMB and    G.D.HoBsoN (Editor),∠44微π065伽07gα痂

    g600h6擁5砂,Pergamon Press,p。377-402。

一,       and _ (1964)Biochemical    compounds in o館hore C&lifbmiasediments and

    sea wateLθ600h吻.Oo鍛06h加。∠4磁,vo1。28,p。

    45-66.

HoNzA,E。,ed。,(1977) Geological investigation of

    Japan and Southem Kurile Trench and Slope

    Areas。(穿60」.5衡7∂裂。」ごψαη07痂θRψ」.,no.7,

    p,127.

HANDA,N。(1974) Geochemical studies on organic

    materials in a200-meter core丘om Lake Biwa.

    In:S。HoRIE(Edictor),Pα」60伽ηoJo9ツげL話8

    B∫zθσαπ4孟hθ」ψごzπPJ665∫066η6。Open_file Rep。,

    no.43,P。285、

_and MlzuNo,K.(1973)Carbohydrates fヒom    lake sediments。0606h67ηゑ6αJ Jo%7鰯,vo1.7,

    P・215-230・

1皿HARA,Y。(1972) Amino acids in Cenozoic sedi-

    ments ofJapan。Pαo.G60」。,vol.6,p。51-63。

KEITH,M.L and DEGENs,E.T.(1959)Geochemical

    indicator of marine and庁esh-water sediments.

    In:P。H.ABELsoN (Editor),Rθ58α6h85 2η

    9806伽吻7。John Wily&Sons,Inc.,New    York,p.38-6L

LuDwING,W.」.,Ew1NG,J。1.,EwING,M.,MuRAuGHI,

    S.,DEN,N.,AsANo,S.,HoTTA,E。,HAYAKAwA,

    M.,AsANu漁,T.,IcHIKへwA,K.and NoGucHI,

    1。(1966) Sediments and structure of the

    Japan Trench.Jo%7,(7θψ妙5。1~65.,vol.71,p。

    2121-2137.

NlssENBAuM,A.,BAEDEcKER,M.J。,and.KApLAN,1.R。

    (1972) Organic geochemistry of Dead Sea

    sediments.0606h諭.Oo鋤ooh珈.∠吻,vo1.36,

    p。709-727。

RoGERs,M。A.(1965)Carbohydrates in aquatic

    plants and associated sediments ffom two

    Mimesota Lakes。0606h乞翅.Oo鋤06h加.孟6’α,

    vo1.29, P.183-200.

SAsAKI,K。(1973) Organo-sedimentological study on

    amino acids in Neogene(Tertiary)rocks ofthe

    Imokawa area,Niigata Prefbcture,Japan.Jo衡7.

    θ60」・Soo.」ψ4η,vol.79,P。427-437.

一329一

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動Jl伽ψh606・」・9加」5μ吻ヴ」卿η,%」.35μVo.7

SuGlsAKI,R.(1980) Chemistry of Pacific sediments of

    the Japanese Islands。 Pψ67 ρ7656η渉64 α君 孟h8

    伽η襯」膨惣の池σ6・6h痂読勘・吻ヅ」吻π,

    7b1砂o,06よ,1980,p.263‘264.  ’一一

SwAIN,F。M.and BRATT,」。M。(1972)Comparative

    carbohydrate Geochemistry of bay,salt marsh

    and deep gulfsediments.In:D。H.HuNNEMAN

    and G。EGLINToN(Editor),z44∂飢σθ5伽oγgα痂

    g806h6η2」5砂,Pergamon Press,p。377-402。

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    CARsoN,B.∫MooRE,G.W。,HoNzA,E.,

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日本海溝とその周辺大陸斜面の深海堆積物中のアミノ酸と単糖類の分布

寺島美南子

要 旨

 日本海溝とその周辺大陸斜面より採取した3本の泥質柱状試料について,アミノ酸と単糖類の有機地

球化学的研究を行った.

 コアの全炭素含有量はo・86-2・16%の範囲に分布していて,P83(大陸斜面),P84(日本海溝),P75(日本

海溝)の順で減少する傾向を示している.コアP83における最も高い炭素含有量は,有機物の供給が最

も多かったためか,または有機物の保存が良かったためと思われる.

 各種のアミノ酸と単糖類が分離され同定された.全アミノ酸は358-2510μg/g,全単糖類は408-2330

μg/gの間にそれぞれ分布している.全アミノ酸と全単糖類の鉛直分布は非常に変動しており,特に,コ

アP83(大陸斜面)において変動が大きい.これらの変動は続成作用とあるいは古環境の変化によって起

こされたものと思われる.P84とP75の2つのコアは日本海溝から採取されたものであるが,全アミノ

酸と全単糖類はともに,コアP84の方がP75よりも高い含有量を示す.コアP84の試料中のL一イソロ

イシンに対するD一アロイソロイシン比がすべて0.05以下の値を示すことは,これらの柱状堆積物が現世

のものであることを意味している.他方,コア:P75のこの比は0.02-0。38の範囲にあり,平均0.17で,

コアP84よりも古い堆積物であることを示している.

 多くの種類のアミノ酸(20)と単糖類(8)が深海堆積物より検出されたが,種々のタイプの生物体が深

海堆積物の有機成分の根源物質である可能性を示している.

(受付:1983年11月4日1受理:1984年6月7目)

一330一