HR: 09:45h
AN: P11E-08    [Abstracts]
TI: Mars early geological and climatic evolution, derived from its surface mineralogy
AU: * Jean-Pierre, B
EM: bibring@ias.u-psud.fr
AF: IAS, batiment 121, Orsay, 91405, France
AU: Yves, L
EM: langevin@ias.u-psud.fr
AF: IAS, batiment 121, Orsay, 91405, France
AU: François, P
EM: francois.poulet@ias.u-psud.fr
AF: IAS, batiment 121, Orsay, 91405, France
AU: Brigitte, G
EM: gondet@ias.u-psud.fr
AF: IAS, batiment 121, Orsay, 91405, France
AU: Nicolas, M
EM: nicolas.mangold@u-psud.fr
AF: IDES, Batiment 509, Orsay, 91405, France
AU: Christophe, S
EM: christophe.sotin@univ-nantes.fr
AF: Université, BP92208, Nantes, 44322, France
AU: Ray, A
EM: arvidson@rsmail.wustl.edu
AF: Earth and Planetary Sciences, Washington University, Saint Louis, MO 63130, United States
AU: Jack, M
EM: john.mustard@brown.edu
AF: Geological Sciences, Brown University, Providence, RUI 02912, United States
AU: the OMEGA team, a
EM: omega@ias.u-psud.fr
AF: IAS, batiment 121, Orsay, 91405, France
AB: The OMEGA/Mars Express reflectance spectroscopy of the Martian Surface, confirmed and detailed by CRISM/MRO, has identified and mapped diagnostic minerals tracing the specific processes that have modelled Mars History. Areas with their pristine mafic constituents are still present in most of the highly cratered terrains, as well as in lava outflows which exhibit a distinct composition characterizing their magmatic source. A major discovery is that of hydrated phyllosilicates within these early terrains, recording an era during which crustal aqueous alteration took place, possibly at the surface itself. Hydrated sulfates have also been identified, in specific areas with geomorphological context indicating a later formation. The location and the compositional diversity of both families of hydrated minerals (phyllosilicates and sulfates), coupled to the stratification evidences, enable to build a consolidated early climatic History that will be discussed in the framework of Mars global geophysical evolution.
DE: 3672 Planetary mineralogy and petrology (5410)
DE: 5220 Hydrothermal systems and weathering on other planets
DE: 5410 Composition (1060, 3672)
DE: 5464 Remote sensing
DE: 5470 Surface materials and properties
SC: Planetary Sciences [P]
MN: 2007 Fall Meeting