中亚巴尔喀什成矿带钼-钨矿床的地质热年代学

陈宣华; 陈正乐; 韩淑琴; 王志宏; 杨屹; 叶宝莹; 李学智; 施炜; 李勇; 陈文

doi:10.3799/dqkx.2012.097

Volume 37 Issue 5

Sep. 2012

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CHEN Xuan-hua, CHEN Zheng-le, HAN Shu-qin, WANG Zhi-hong, YANG Yi, YE Bao-ying, Li Xue-zhi, SHI Wei, LI Yong, CHEN Wen, 2012. Geothermochronology of Mo-W Deposits in Balkhash Metallogenic Belt, Kazakhstan, Central Asia. Earth Science, 37(5): 878-892. doi: 10.3799/dqkx.2012.097

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CHEN Xuan-hua, CHEN Zheng-le, HAN Shu-qin, WANG Zhi-hong, YANG Yi, YE Bao-ying, Li Xue-zhi, SHI Wei, LI Yong, CHEN Wen, 2012. Geothermochronology of Mo-W Deposits in Balkhash Metallogenic Belt, Kazakhstan, Central Asia. Earth Science, 37(5): 878-892. doi: 10.3799/dqkx.2012.097

Citation:

CHEN Xuan-hua, CHEN Zheng-le, HAN Shu-qin, WANG Zhi-hong, YANG Yi, YE Bao-ying, Li Xue-zhi, SHI Wei, LI Yong, CHEN Wen, 2012. Geothermochronology of Mo-W Deposits in Balkhash Metallogenic Belt, Kazakhstan, Central Asia. Earth Science, 37(5): 878-892. doi: 10.3799/dqkx.2012.097

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Geothermochronology of Mo-W Deposits in Balkhash Metallogenic Belt, Kazakhstan, Central Asia

doi: 10.3799/dqkx.2012.097

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Geological Survey Team No.1, Xinjiang Bureau of Geological Exploration, Urumqi 830011, China
3.
Geological Survey, China University of Geosciences, Beijing 100083, China
4.
Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China

Received Date: 2011-11-12
Available Online: 2021-11-10
Publish Date: 2012-09-15

Abstract

Abstract

The Balkhash metallogenic belt in Kazakhstan, with many porphyritic Cu-Mo deposits and some quartz-vein greisen Mo-W deposits, is a famous porphyritic Cu-Mo metallogenic belt in Central Asian metallogenic domain. Three typical Mo-W deposits such as East Kounrad, Akshatau, and Zhanet, are studied in this paper through the application of geothermochronology. Zircon SHRIMP U-Pb geochronology yields ages of 293.6±2.7 Ma (alkaline granite), 306±1 Ma (granodiorite), and 304±4 Ma (porphyry monzonite), for East Kounrad, Akshatau, and Zhanet deposits respectively, belonging to the tectonic-magmatism in the Late Hercynian. ⁴⁰Ar/³⁹Ar thermochronology gives the cooling ages at 292±3 Ma for biotite from Akshatau, and 288.8±3.6 Ma and 278±5 Ma for K-feldspars from Akshatau and East Kounrad, respectively. Apatite fission track dating of granitoids gives low temperature cooling ages of 92.1±5.7 Ma, 92.2±5.0 Ma and 80.3±4.9 Ma, for East Kounrad, Akshatau, and Zhanet deposits, respectively, suggesting the uplifting and exhumation of Mo-W deposits together with the granitoids during the Late Cretaceous. The geochronological data and thermal history modeling presented in this paper, together with metallogenic information from previous studies, reveal the entire thermo-history, from the intrusion of plutons and Mo-W metallogenesis in the abyssal system in the Late Carboniferous and the Early Permian, through regional cooling, to the exhumation of the deposits in the Late Cretaceous, in the western part of Balkhash metallogenic belt.
- geochronology,
- SHRIMP U-Pb,
- ⁴⁰Ar/³⁹Ar,
- fission track,
- Mo-W deposit,
- Balkhash metallogenic belt

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References(52)

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Geothermochronology of Mo-W Deposits in Balkhash Metallogenic Belt, Kazakhstan, Central Asia

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