Metallogenesis of the Ertix gold belt, Xinjiang and its relationship to Central Asia-type orogenesis |
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| Authors: | CHEN Huayong CHEN Yanjing Liu Yulin |
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| Institution: | 1. Department of Geology, Peking University, Beijing 100871, China
2. The Open Laboratory of Metamorphic Geology of Changchun University of Science and Technology, Changchun 130061, China |
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| Abstract: | The Ertix gold belt is located on the boundary of the Kalatongke arc and the Kelan back-arc basin of D-C1. Most scholars used
to interpret the formation and distribution of the gold deposits in the Ertix tectonic belt in terms of the petrogenic and
metallogenic models for active continental margins. However, enormous data of isotopic dating and geologic research show that
the mineralization was obviously later than the oceanic subduction, whereas exactly simultaneous with the collisional orogenesis
during C2-P, especially at the transition stage from collisional compression to extension. Based on study of metallogenic time, tectonic
background, ore geology, ore fluid nature, ore material source, etc., we reveal that all the gold deposits possess the character
of orogenic deposits formed in collisional orogenic system, and that their ore-forming materials mainly have derived from
the stratigraphic terranes south to individual deposits. Accordingly, the theoretical tectonic model for collisional metallogenesis
and petrogenesis is employed to explain the formation of the Ertix gold belt and to determine the gold exploration directions. |
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| Keywords: | Ertix gold belt late Carboniferous-early Permian petrogenic and metallogenic model for collisional orogenesis |
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