NDLI: A study on the b$_{0}$ parameter and crystallinity index of K-white micas from low-grade metapelites in Deokpyeong and Miwon areas, central Ogcheon metamorphic belt, Korea

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A study on the b$_{0}$ parameter and crystallinity index of K-white micas from low-grade metapelites in Deokpyeong and Miwon areas, central Ogcheon metamorphic belt, Korea

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Geosciences Journal : Volume 4, Issue 2, June 2000

Geosciences Journal : Volume 4, Issue 1, March 2000

Geosciences Journal : Volume 3

Geosciences Journal : Volume 2

Geosciences Journal : Volume 1

A study on the b$_{0}$ parameter and crystallinity index of K-white micas from low-grade metapelites in Deokpyeong and Miwon areas, central Ogcheon metamorphic belt, Korea

Content Provider	Springer Nature Link
Author	Kim, Hyeoncheol Cho, Moonsup Ahn, Jung Ho
Copyright Year	2000
Abstract	In order to elucidate metamorphic conditions of metasedimentary rocks of central Ogcheon metamorphic belt, we investigated the b$_{0}$ parameter and the crystallinity index (CI) of K-white micas from low-grade metapelites. The CI values of muscovite from seventy-eight samples range from 0.08° to 0.19° Δ2θ with an average of 0.12±0.01° Δ2θ, and show no remarkable difference between structurally upper Pibanryeong and lower Poeun lithotectonic units. Slate and phyllite of the Poeun unit have the b$_{0}$ parameters of 8.993–9.031 Å with an average of 9.010±0.007 Å (n=63), whereas those in the vicinity of Poeun granite have slightly lower values of 8.988–9.010 Å with an average of 8.998±0.006 Å (n=33). On the other hand, b$_{0}$ parameters of pelitic schists in the Pibanryeong unit vary from 8.995 Å to 9.042 Å (n=29) with an average of 9.009±0.013 Å that is similar to 9.003±0.009 Å (n=26) in the Poeun unit. These results suggest that low-grade metapelites of central Ogcheon metamorphic belt have experienced a mediumpressure type metamorphism, reaching up to the upper greenschist facies (biotite zone) condition. Moreover, metamorphic pressures estimated from the b$_{0}$ values show no apparent discontinuity across the unit boundary, implying an insignificant vertical displacement along this boundary after the peak metamorphism.
Starting Page	201
Ending Page	209
Page Count	9
File Format	PDF
ISSN	12264806
Journal	Geosciences Journal
Volume Number	4
Issue Number	3
e-ISSN	15987477
Language	English
Publisher	Springer-Verlag
Publisher Date	2000-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ogcheon metamorphic belt white mica b$_{0}$ parameter crystallinity index medium-pressure type Geosciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Environmental Science

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A study on the b$_{0}$ parameter and crystallinity index of K-white micas from low-grade metapelites in Deokpyeong and Miwon areas, central Ogcheon metamorphic belt, Korea