A Study on the Muscovite-Pyrophyllite Mixed Phase in the Shale from the Manhang Formation, Taebaek Area

Autor:	Hyang-Ran Mun, Jung-Hoo Lee, Young-Boo Lee, Seung Hyun Choi
Rok vydání:	2011
Předmět:	Mineral Muscovite Mineralogy Electron microprobe engineering.material Transmission electron microscopy visual_art Illite visual_art.visual_art_medium engineering Particle Oil shale Geology Pyrophyllite
Zdroj:	Journal of the Mineralogical Society of Korea. 24:313-320
ISSN:	1225-309X
DOI:	10.9727/jmsk.2011.24.4.313
Popis:	Mica-type phyllosilicate particles in the shales of the Manhang formation at the Taeback area in the Kangwon Province were studied using electron probe microanalysis (EPMA) and transmission electron microscopy (TEM). The average chemical formula of the mica-type phyllosilicate mineral analysed by EPMA is K1.35(Fe0.18Mg0.03Al3.86)(Si6.55Al1.45)O20(OH)4. Low K contents compared to the ideal chemistry of muscovite indicate the presence of illite in the mica-type phyllosilicate particle. X-ray diffraction study showed that pyrophyllite commonly coexists with muscovite in the shales from the Manhang Formation. TEM observations showed both the interlayer and intralayer mixing of 9.3-Å pyrophyllite and 10-Å muscovite layers. The low K content of the mica-type phyllosilicates apparently
Databáze:	OpenAIRE
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