Biotitization of vermiculite under hydrothermal condition.
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Accession number;03A0194738
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| Title;Biotitization of vermiculite under hydrothermal condition. |
| Author;
MURAKAMI T
(Univ. Tokyo, Tokyo, Jpn)
KASAMA T
(Univ. Tokyo, Tokyo, Jpn)
SATO M
(Univ. Tokyo, Tokyo, Jpn)
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Journal Title;J Mineral Petrol Sci
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Journal Code:G0150B
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ISSN:1345-6296
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VOL.97;NO.6;PAGE.263-268(2002)
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| Figure&Table&Reference;FIG.8, REF.16 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Hydrothermal experiment was carried out reacting vermiculite with K- and Si-bearing solutions in a Teflon vessel at 150.DEG.C. for 14,51, and 71 days to demonstrate biotitization of vermiculite. Our results revealed that biotite is formed within 71 days. High-resolution transmission microscopy and energy dispersive X-ray spectrometry showed that biotite is formed by precipitation directly from solution, domain formation in vermiculite, layer-by-layer transformation of vermiculite, or combination of the three. Our results clearly indicate that biotitization of vermiculite occurs under hydrothermal condition when K is available. Our study suggests that vermiculite formed during weathering is altered progressively to biotite by diagenesis as well as metamorphism after burial. (author abst.) |
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