Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2018 Annual Meeting of Japan Association of Mineralogical Sciences
Session ID : S2-02
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S2: Water Rock Interaction
Saline fluid inclusions in magnesite of listvenite in Ethiopia: Carbonization through seawater-serpentinite interaction
*Tatsuhiko KawamotoTatsuki TSUJIMORIYuzuki SHINJIAyano SOFIYA
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Abstract

Listvenite, a carbonated rock in serpentinite, consisits of carbonate, talc, and quartz. Sophia et al. (2017 IGR) reported listvenite associated with the Neoproterozoic metamorphic sedimentary rocks in Ethiopia. There are many primary saline fluid inclusions in the magnesite (2.3% NaCl). Serpentinite reacted with seawater to form listvenite at around 210°C. Hydrothermal fluids having a carbon content of seawater allow serpentine to change to magnesite, talc, and quartz (Falk & Kelemen 2015 GCA).

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© 2018 Japan Association of Mineralogical Sciences
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