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10/26: NAI Director's Seminar featuring Adrian Brown
Event Details
Time: October 26, 2015 from 1pm to 2pm
Location: Adobe Connect
Website or Map: http://ac.arc.nasa.gov/nai_di…
Event Type: online, seminar
Organized By: Mike Toillion
Latest Activity: Feb 13, 2018
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Event Description
Serpentinization on Mars: Observational Evidence and Theory
The presence of talc following carbonated serpentization has been linked to Earth analogs in terrestrial greenstone belts such as the Pilbara in Western Australia, where talc bearing komatiite cumulate units of the Dresser Formation overlie the siliceous, stromatolite-bearing Strelley Pool Chert unit (Van Kranendonk and Pirajno, 2004). If a similar relationships exists on Mars, investigations of rocks stratigraphically beneath the talc-bearing units at Nili Fossae may provide the best chance to examine well preserved, siliceous organics. This hypothesis is testable at the Southern Nili Fossae proposed landing site, for example.
In preparation for the the Mars 2020 landing site, we are examining the thermodynamic relationships that favor formation of serpentine and talc-carbonate and different pressures and temperatures in the crust (Barnes 2007). This is important as it will constrain the low grade metamorphism required to replicate the proposed models of serpentinisation and help us understand the regional metamophic gradient that is critical to furthering our knowledge of the ancient rocks of Nili Fossae.
Comment Wall
Comment
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Comment by Mike Toillion on October 27, 2015 at 10:14am
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Absolutely, all of our seminars are recorded and available online. Here's the link for this one: https://astrobiology.nasa.gov/seminars/featured-seminar-channels/na...
Cheers,
Mike
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Comment by Adam Smith on October 26, 2015 at 2:13pm
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Sadly I was unable to attend to watch Adrian Brown's presentation. Is there any chance of watching a recording ?
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