Cartografia Geologica di Corpi Planetari

Pozzobon R. (1), Massironi M. (2), Giacomini L (2)., Ferrari S. (2), Cremonese G. (1)

1 . I N A F – O s s e r v a t o r i o A s t r o n o m i c o d i P a d o v a

2 . D i p a r t i m e n t o d i G e o s c i e n z e , U n i v e r s i t à d e g l i S t u d i d i P a d o v a

From PDS to ArcGIS

Mars Reconnaissance Orbiter CTX images (ISIS3 USGS software)

Mars Reconnaissance Orbiter CTX images

Raw image from PDS

Radiometrically calibrated and destriped image

Projected

ArcGIS integrated Planetary Ellipsoids and Geographic Coordinate Systems

Mercury Global Map (Messenger Data)

90 -180 180

90

-90 180

-90 -180

Rembrandt basin: geological domains

Inner Plains

Proximal Ejecta

Hummocky Area

100 km

Rembrandt basin: Rembrandt scarp

100 km

a

d

c

b

DAEDALIA PLANUM (MARS)

Arsia Mons

Pavonis Mons

Ascraeus Mons

Olympus Mons

Lava flows: over 1500 km of length Slope gradient: always <0.5° (commonly <0.1°)

daytime thermal infrared 12.57μm

DAEDALIA PLANUM MAPPING

Omega Daedalia Planum Map

SAM (Spectral Angle Mapper)

DAEDALIA PLANUM MAPPING

DAEDALIA PLANUM GEOLOGIC MAP

DATING THROUGH CRATER COUNTING

Generate shapefiles Mark craters

Plot ages

THARSIS MONTES

ASCRAEUS MONS WORKFLOW

• Structural interpretation of the last deformation features on Ascraeus Mons • FEM modelling • Origin of the structures on Ascraeus Mons

STRUCTURAL INTERPRETATION

Concentric Grabens

Concentric Pits (craters and chains)

Concentric Faults

Radial Grabens

Radial Pits (craters and chains)

Transitional Structures

Structural Interpretation on immages acquired

by Mars Express mission Istrument:

mosaic

TOPOGRAPHIC PROFILES EXTRACTION

STEP 1: extraction of the topographic profile from MOLA data normalization and averaging of the profiles to a mean radius

EXAMPLE OF CYLINDRICAL AXIAL SYMMETRY

RESULTS Only a magma chamber with an oblate shape at a depth of 70-90 km can generate a tensional stress field compatible with the observed structures

DE

PT

H (

km)

RADIAL ZONE

CONCENTRIC ZONE TRANSITIONAL ZONE

PROs: Effectiveness in importing PDS files Availability of many solar system body ellipsoids and projections Strong potential of mosaicking Graphic tools for geological mapping Cratertools for age determinantion Easy DTM treatment and integration of independent data CONs: Lack of DTM generation tools from stereo couples Lack of tools for advanced multi/hyper spectral analysis (Pca, supervised and unsupervised Classifications, spectral signature treatment)

CONCLUSIONS: ARCGIS IN PLANETARY SCIENCES

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