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<p>Because there is a candidate seminar on Tues, there will be no
EOAS colloquium talk on Fri Feb 7. Please join us instead for the
candidate seminar on Tues., announcement below:<br>
</p>
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<td>[Eoas-seminar] Tuesday Feb 4th Faculty Candidate for
Solid Earth Processes in the Lithosphere (Hector Manadrid)</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Date: </th>
<td>Fri, 31 Jan 2020 21:01:56 +0000</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">From: </th>
<td>eoas-seminar--- via Eoas-seminar
<a class="moz-txt-link-rfc2396E" href="mailto:eoas-seminar@lists.fsu.edu"><eoas-seminar@lists.fsu.edu></a></td>
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<td><a class="moz-txt-link-abbreviated" href="mailto:eoas-seminar@lists.fsu.edu">eoas-seminar@lists.fsu.edu</a></td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">To: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:eoas-seminar@lists.fsu.edu">eoas-seminar@lists.fsu.edu</a>
<a class="moz-txt-link-rfc2396E" href="mailto:eoas-seminar@lists.fsu.edu"><eoas-seminar@lists.fsu.edu></a></td>
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<font class="" style="font-size: 14px;" face="Georgia">Dear all,</font>
<div class=""><font class="" style="font-size: 14px;" face="Georgia"><br class="">
</font></div>
<div class=""><font class="" face="Georgia"><span class="" style="font-size: 14px;">Dr. Hector Lamadrid will be
visiting us from Feb. 3rd-5th as part of the faculty search
for Solid Earth Processes in the Lithosphere (Metamorphic
Petrology).</span></font></div>
<div class=""><font class="" style="font-size: 14px;" face="Georgia"><br class="">
</font></div>
<div class="">
<div class=""><font class="" style="font-size: 14px;" face="Georgia">I am attaching the title and abstract of his
talk. The talk is scheduled at <b class="">3:30 PM on 4th
February 2020</b> (Tuesday) at</font><span class="" style="font-size: 14px; font-family: Georgia;"> </span><b class="" style="font-size: 14px; font-family: Georgia;">EOA
1044</b><span class="" style="font-size: 14px; font-family:
Georgia;">.</span></div>
<div class=""><br class="">
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<div class=""><font class="" style="font-size: 14px;" face="Georgia">I hope you are able to attend the talk.</font></div>
<div class=""><br class="">
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<div class=""><font class="" style="font-size: 14px;" face="Georgia"><span class=""><b class="">Title:</b></span><b class=""> </b><span class="" style="text-align: center;">Serpentinization
and other hydrothermal reactions in crustal environments:
Experimental and analytical developments in the study of
fluid-rock interactions.</span></font></div>
<div class=""><font class="" style="font-size: 14px;" face="Georgia"><br class="">
</font></div>
<div class=""><font class="" style="font-size: 14px;" face="Georgia"><b class="">Abstract:</b> The hydrothermal
alteration of mantle rocks, commonly known as
serpentinization, is a major geological process that has a
strong influence on the exchange of mass and energy between
the deep Earth and the surface of the planet, affects the
rheology and seismic structure of the oceanic lithosphere,
and during subduction affects the formation of arc
magmatism. Serpentinization encompasses a series of
disequilibrium and equilibrium reactions (hydration,
dehydration, carbonation, oxidation, etc.) that produces
serpentine phases (mainly lizardite and/or chrysotile) ±
brucite ± talc ± magnetite ± carbonates ± volatiles like H<sub class="">2</sub> and CH<sub class="">4</sub>. The
potential of H<sub class="">2</sub> and CH<sub class="">4 </sub>to
sustain chemoautotrophic microorganisms on early Earth, and
the seemingly straight forward correlation to the
serpentinization reaction has fueled the interest from the
scientific community concerning how the overall process of
hydrothermal alteration of ultramafic minerals is linked to
the origin of life and the habitability of other planetary
bodies (e.g. Mars and the icy moons of Jupiter and Saturn).
These far-reaching implications underscore the importance of
the quantitative understanding of the influence of physical
and chemical conditions on the rates of the serpentinization
reaction, and the identification of the geological
environments most favorable for serpentinization. Here we
show results of a series of ongoing projects studying the
kinetics of the hydration, carbonation (CO<sub class="">2</sub> sequestration)
and dehydration reactions, aimed to better understand the
individual effects that the geological environments
(temperature, pressure, fluid chemistry, rock composition,
etc.) impose in the overall serpentinization processes, and
the future directions of this research. Our results confirm
that the fluid composition is one of the most important
controlling factors in the serpentinization rates and can
set constraints on the mass and energy transfer between
different reservoirs. The fluid composition of the
hydrothermal system can have important implications on how
we model the serpentinization process, especially
considering how little we know about the fluid chemistry in
several geologic environments where serpentinization and
other fluid-rock interactions occur (e.g. subduction zones
and the ocean chemistry of other planetary bodies).
Moreover, we will show recent successes in the development
of new experimental and analytical methodologies that allow
us to constrain and control some of the rapidly changing
physical and chemical conditions that occur in fluid-rock
interactions.</font></div>
<div class=""><br class="">
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<div class=""><font class="" style="font-size: 14px;" face="Georgia">Best wishes</font></div>
<div class=""><font class="" style="font-size: 14px;" face="Georgia">Mainak</font></div>
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Mainak Mookherjee<br class="">
Associate Professor<br class="">
Earth, Ocean and Atmospheric Sciences<br class="">
Florida State University<br class="">
Tallahassee, FL, 32310, USA<br class="">
<br class="">
Phone: (850) 644 1536 (Office)<br class="">
<a href="mailto:mmookherjee@fsu.edu" class="" moz-do-not-send="true">Email: mmookherjee@fsu.edu</a><br class="">
Email: <a class="moz-txt-link-abbreviated" href="mailto:mainak.mookherjee@gmail.com">mainak.mookherjee@gmail.com</a><br class="">
URL:<a class="moz-txt-link-freetext" href="http://myweb.fsu.edu/mmookherjee">http://myweb.fsu.edu/mmookherjee</a><br class="">
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