Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2018 Annual Meeting of Japan Association of Mineralogical Sciences
Session ID : S2-11
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S2: Water Rock Interaction
Rapid subsolidus reaction between jadeite and spodumene in the presence of trace H2O
*Naoko TakahashiTakayuki NakataniTatsuki TsujimoriMichihiko Nakamura
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CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

We experimentally studied the equilibration mechanism of jadeite (Jd: NaAlSi2O6) and spodumene (Spd: LiAlSi2O6) at 700°C for 72 hours and 800°C for 48 hours at 2 GPa. Our obaservations indicate that the mineral replacement via dissolution-reprecipitation rather than a diffusive Na-Li exchange occurred. Moreover, even trace amount of water may work as a solvent and enhance rapid mineral replacement at subsolidus conditions.

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© 2018 Japan Association of Mineralogical Sciences
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