Discussion on Middle Jurassic metallogenic mechanism of Au-Mo polymetallic hydrothermal deposits in eastern Jilin |
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| Authors: | LI Bile SHEN Xin |
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| Institution: | LI Bile and SHEN Xin College of Earth Sciences,Jilin University,Changchun 130061,China |
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| Abstract: | In the Middle Jurassic,a large-scale tectonic-magmatic activities and hydrothermal mineralization occurred in the eastern Jilin province.The deposit types consist of the orogenic gold deposit,porphyry molybdenum deposit and skarn gold deposit,etc.,which constitute regional hydrothermal metallogenic series.The magmatic bodies related to mineralization belong to calc-alkaline series,which are characterized by active continental margins.The above-mentioned different types of deposits formed in a uniform tectonic setting,which resulted from the combined processes between the subduction of Pacific plate under the Eurasia plate and the persistent post-collisional convergent forces between the North China plate and the Siberian plate.The mineralizations were happening in the deceleration period,after which Paleo-Pacific plate was strongly subducted under the Eurasia continental block,i.e.transition period from compression to extension. |
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| Keywords: | Middle Jurassic orogenic gold deposit porphyry molybdenum deposit metallogenic mechanism eastern Jilin |
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