[Baps] Subject change for Mustard talk

[Paul Withers]

This was advertised as a Phoenix talk, but it isn't. It's our first 
seminar of the semester, so the system isn't running smoothly yet.

Apologies,
Paul

-------- Original Message --------
Subject: [Csp_seminar] CSP Seminar TODAY - John Mustard
Date: Thu, 22 Jan 2009 10:10:56 -0500 (EST)
From: Erin T. Buck <etbuck at bu.edu>
To: csp_seminar at bu-ast.bu.edu

Speaker:  John Mustard

Affiliation:  Brown University
Date: Thursday, January 22, 2009
Time:  3:30 cookies, 4:00 talk
Place: 725 Commonwealth Ave. Room 502


Title:  Hydrated Minerals on Mars and their Geologic Environments:
Implications for the History of Water


Abstract:  Phyllosilicate and sulfate hydrated minerals were first
definitively identified on Mars from orbit by the OMEGA (Observatoire pour
la Mineralogie, L'Eau, les Glaces et l'Activitié) instrument on board Mars
Express. Global mapping showed that sheet silicates are widespread but
largely found in terrains of Noachian age while sulfates were localized in
the region of Valles Marineris, Aram Chaos, Meridiani, and dunes in the
northern plains. In contrast to sulfates, phyllosilicate formation
requires moderate to high pH and high water activity. A major hypothesis
evolving from this discovery is that the conditions necessary for
phyllosilicate formation were specific to the Noachian, the earliest era
in Mars' history and sulfate formation evolved subsequent to that as Mars
experienced massive global change. I will explore this hypothesis
incorporating new high spatial resolution, precision pointing, and nested
observations by the Context Imager (CTX), Compact Reconnaissance Imaging
Spectrometer for Mars
(CRISM), and the High Resolution Imaging Sci-ence Experiment (HiRISE)) on
the Mars Reconnaissance Orbiter (MRO). These data provide enhanced
capabilities to analyze surface mineralogy across the planet and determine
the nature and geologic setting of hydrated mineral deposits. Analysis of
the diversity of phyllosilicates, associated hydrated minerals, and their
geologic setting based on integrated OMEGA-CRISM-MRO analysis will be
covered and the implications considered.


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-- 
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Paul Withers                            Center for Space Physics
Office  +1 617 353 1531                 Boston University
Fax     +1 617 353 6463                 725 Commonwealth Avenue
Email   withers at bu.edu                  Boston MA 02215, USA
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