An early Paleozoic tectonothermal event in western Mongolia: Implications for regional extension of the Cambrian orogenic belt
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概要
- 論文の詳細を見る
The Central Asian Orogenic Belt consists of various terranes amalgamated in several periods from the Late Precambrian/Early Paleozoic to the Late Mesozoic. Mongolia is situated in the center of this belt. Foliated garnet granite (Grt metagranite) and andalusite-bearing massive leucogranite (Leucogranite) are exposed in the Hanhohiyn region of northwest Mongolia. The results of monazite Th-U-Pb dating of the Grt metagranite and Leucogranite give ages of 508 ± 10 Ma and 496 ± 4 Ma, respectively. Cambrian granite with an age of ∼ 500 Ma is also reported from the south-central part of Mongolia. Combined with previously published age data of metamorphic and intrusive rocks, these results show that the Cambrian orogenic belt spans over 800 km, from the northwest to the south-central part of Mongolia.
- 日本鉱物科学会の論文
著者
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Owada Masaaki
Department Of Earth Sciences University Of Yamaguchi
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Adachi Tatsuro
Division Of Earth Sciences Faculty Of Social And Cultural Studies Kyushu University
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Osanai Yasuhito
Division Of Earth Sciences Faculty Of Social And Cultural Studies Kyushu University
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Nakano Nobuhiko
Division Of Earth Sciences Faculty Of Social And Cultural Studies Kyushu University
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Sereenen Jargalan
Mongolian University Of Science And Technology
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Sereenen Jargalan
Mongolian Univ. Sci. And Technol.
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SATISH-KUMAR Madsudan
Department of Geology, Niigata University
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YONEMURA Kazuhiro
Division of Earth Sciences, Faculty of Social and Cultural Studies, Kyushu University
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YOSHIMOTO Aya
Division of Earth Sciences, Faculty of Social and Cultural Studies, Kyushu University
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BOLDBAATAR Chimedteie
Mineral Resource Authority of Mongola
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