| Geology and Genesis of the Mafic—Ultramafic Complexes in the Huangshan—Jingerquan（HJ） Belt,East Xinjiang |
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| 摘 要： |
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| 关 键 词： | 地质学 铁镁质超基性岩 橄榄岩 辉岩 新疆 |
Geology and genesis of the mafic-ultramafic complexes in the Huangshan-Jingerquan (HJ) belt,East Xinjiang |
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| Authors: | Gu Lianxing Zhu Jianlin Guo Jichun Liao Jinjuan Yan Zhenfu Yang Hao Wang Jinzhu |
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| Institution: | (1) Department of Earth Sciences, Nanjing University, 210093 Nanjing;(2) Geological Team No. 6, Xinjiang Bureau of Geology and Mineral Resources, Hami, 839000 Xinjiang |
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| Abstract: | More than twenty mafic-ultramafic complexes, which host several mediumor large-sized Cu−Ni deposits, occur along the Huangshan-Jingerquan
(HJ) belt in East Xinjiang. Rock types in these complexes are predominated by peridotite, pyroxene peridotite, olivine pyroxenite,
gabbronorite, orthopyroxene gabbro, troctolite, gabbro and diorite. The ultramafic rocks are relatively Fe-enriched and are
characterized by an assemblage of olivine+orthopyroxene+clinopyroxene+hornblende±plagioclase without obvious metamorphic textures.
Chemically, these complexes are relatively Fe-enriched and show a tholeiitic trend of evolution. The complexes in this belt
are intruded under the extensional environment in a Mid-Carboniferous back-arc basin. They can be considered as a new type
of mafic-ultramafic complexes in orogenic belts, as designated by the name of the East-Xinjiang-type complexes.
This project was financially supported by the National Natural Science Foundation of China. |
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| Keywords: | geology and genesis mafic-ultramafic complexes Xinjiang |
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