The effect of iron content on the kinetics of talc dehydration and its geological significance

ZHANG Ruixin; YI Li; LIU Hong; YANG Siyu

2017 Vol. 36, No. 6

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ZHANG Ruixin, YI Li, LIU Hong, YANG Siyu. The effect of iron content on the kinetics of talc dehydration and its geological significance[J]. Geological Bulletin of China, 2017, 36(6): 1051-1055.

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ZHANG Ruixin, YI Li, LIU Hong, YANG Siyu. The effect of iron content on the kinetics of talc dehydration and its geological significance[J]. Geological Bulletin of China, 2017, 36(6): 1051-1055.

The effect of iron content on the kinetics of talc dehydration and its geological significance

Institute of Earthquake Science, China Earthquak Adminstration, Beijing 100036, China

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Corresponding author: YI Li, hnyili@126.com

Received Date: 20 December 2016

Revised Date: 28 April 2017

Publish Date: 25 June 2017

Abstract

Abstract

The effect of iron content on the kinetics of talc dehydration was studied with talc of different iron values using in-situ synchrotron X-ray diffraction (XRD).The sample particle size is 2~5μm.The air atmosphere synchrotron radiation in situ XRD de-hydration experiment was carried out under atmospheric pressure.High content of iron obviously resulted in lower dehydration tem-perature.The difference of the dehydration temperature of two samples was above 127℃.The dehydration of talc followed random nucleation and growth mechanism, and fitted Avrami equation, with n being 1.669.The results suggest that the dehydration of differ-ent iron values of talc may occur at the different depths around hundreds of kilometers, so the study was significant to the understand-ing of the genetic mechanism of earthquakes in the subduction zone.
- talc /
- dehydration /
- iron content /
- in-situ /
- XRD /
- earthquake

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