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GEOLOGICAL CHARACTERISTICS AND TECTONIC SIGNIFICANCE OF GONGHUDUGE GRANITE ROCK BODY IN SIZIWNAGQI, INNER MONGOLIA |
LI Lan-ying |
Shenyang Institute of Geology and Mineral Resources, Shenyang 110033, China |
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Abstract The Gonghuduge granite rock body, which is tectonically located in the north margin of Sino-Korean platform,intruded Ordovician strata and was intruded by late Late Paleozoic granite. The K-Ar dating (306.4 Ma) of biotite shows that the rock is formed in the middle stage of Late Paleozoic era. The rock body is composed of mainly granodiorite and quartz-mica diorite. It is characterized by peraluminous rock, with high-Fe biotite. The Gonghuduge rock body belongs to crust-derived granite of S-type, formed in the post-collision-epirogenic movement in the later stage of the convergence of Sino-Korean and Siberian plates. The occurrence of the Gonghuduge granite is controlled by deep fault.
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Received: 10 January 2005
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[1] |
CHEN Hui-jun, CUI Tian-ri, QIAN Cheng, LI Lin-chuan, CHEN Jing-sheng, LI Wei, WU Xin-wei, JIANG Bin, SI Qiu-liang, QIN Tao, TANG Zhen, ZHANG Yu-jin, GUO Wei. ZIRCON U-Pb GEOCHRONOLOGY OF BASHENGHE PLUTON IN NORTHERN DAXINGANLING MOUNTAINS: Geological Implications[J]. GEOLOGY AND RESOURCES, 2019, 28(5): 405-412. |
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