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<font face="Georgia" class="" style="font-size: 14px;">Dear all,</font>
<div class=""><font face="Georgia" class="" style="font-size: 14px;"><br class="">
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<div class=""><font face="Georgia" class=""><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 face="Georgia" class="" style="font-size: 14px;"><br class="">
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<div class=""><font face="Georgia" class="" style="font-size: 14px;">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>
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<div class=""><font face="Georgia" class="" style="font-size: 14px;">I hope you are able to attend the talk.</font></div>
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<div class=""><font face="Georgia" class="" style="font-size: 14px;"><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 face="Georgia" class="" style="font-size: 14px;"><br class="">
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<div class=""><font face="Georgia" class="" style="font-size: 14px;"><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>
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<div class=""><font face="Georgia" class="" style="font-size: 14px;">Best wishes</font></div>
<div class=""><font face="Georgia" class="" style="font-size: 14px;">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="">
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Phone: (850) 644 1536 (Office)<br class="">
<a href="mailto:mmookherjee@fsu.edu" class="">Email: mmookherjee@fsu.edu</a><br class="">
Email: mainak.mookherjee@gmail.com<br class="">
URL:http://myweb.fsu.edu/mmookherjee<br class="">
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