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Interlayered Structures of Talc and Chlorite in the Talc Deposits of the Yugu Area, Korea  

Kim Geon-Young (Korea Atomic Energy Research Institute)
Kim Soo Jin (School of Earth and Environmental Sciences, Seoul National University)
Koh Yong Kwon (Korea Atomic Energy Research Institute)
Bae Dae Seok (Korea Atomic Energy Research Institute)
Publication Information
Journal of the Mineralogical Society of Korea / v.18, no.3, 2005 , pp. 195-204 More about this Journal
Abstract
Interlayered structures of talc and chlorite in the talc deposits of the Yugu area are studied using transmission electron microscope. Packets of chlorite-like layer in talcs or packets of talc-like layer in chlorites are commonly observed. Randomly interlayered features of talc and chlorite are locally observed in some specimens. Reactions observed in the present study include the addition or removal of a brucite-like layer in the interlayer region of the talc or chlorite resulting in the , transformation between a talc and a chlorite layers and breakdown or formation of a talc-like layer resulting in transformation between two talc layer and one chlorite layer. Both reactions are accompanied by a significant change in volume. In addition to these mechanisms, there are two volume conserving mechanisms; the combination of both mechanisms and mutual transformation in a complex manner. Reactions from 2 chlorite layers to 3 talc layers, from 2 chlorite layers + 1 talc layers to 1 chlorite layers + 3 talc layers, and from 3 chlorite layers to 5 talc layers are observed among the complex type mechanisms.
Keywords
interlayered structure; transmission electron microscope (TEM); talc; chlorite; Yugu area;
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