Zircon U-Pb Age and Geological Significance of Dulunhe Granite in Tuoli, Western Junggar

DUAN Fenghao; LI Yongjun; WANG Ran; JI Zhengbao; CHENG Wanli; GUO Xin

Northwestern Geology > 2015 > 48(3): 140-148.

DUAN Fenghao, LI Yongjun, WANG Ran, et al. Zircon U-Pb Age and Geological Significance of Dulunhe Granite in Tuoli, Western Junggar[J]. Northwestern Geology, 2015, 48(3): 140-148.

Citation:

DUAN Fenghao, LI Yongjun, WANG Ran, et al. Zircon U-Pb Age and Geological Significance of Dulunhe Granite in Tuoli, Western Junggar[J]. Northwestern Geology, 2015, 48(3): 140-148.

Citation:

DUAN Fenghao, LI Yongjun, WANG Ran, et al. Zircon U-Pb Age and Geological Significance of Dulunhe Granite in Tuoli, Western Junggar[J]. Northwestern Geology, 2015, 48(3): 140-148.

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Zircon U-Pb Age and Geological Significance of Dulunhe Granite in Tuoli, Western Junggar

1.
Earth Science and Resources College, Chang'an University, Xi'an 710054, Shaanxi, China
2.
Earth Science and Resources College, Chang'an University, Xi'an 710054, Shaanxi, China;Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Xi'an 710054, Shaanxi, China
3.
No.7 Geological Survey Party, Xinjiang Bureau of Geology and Mineral Resource Exploration, Wusu 833000, Xinjiang, China

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Received Date: March 13, 2015
Revised Date: April 28, 2015
Published Date: September 04, 2015

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Abstract

Abstract

There are large numbers of intrusive granites exposed along the Daerbute tectonic-magmatic belt in the center of western Junggar. Many researches have been conducted on the batholites instead of small granite intrusions, which mainly distributed in porphyry mineralization belt of the Baogutu region. Wallrock alterations such as malachitization, silicification, carbonatization, chloritization and pyritization are well developed in Dulunhe granite, which is located in Kuoyitasi area of Zayier Mountain, and abundant mafic microgranular enclaves can be found in these host rocks, however, accurate geochronology data is still insufficient. High-precision LA-ICP-MS zircon U-Pb dating reveals that the quartz diorite in the Dulunhe granite is formed at (312.6±4.2)Ma(n=21, MSWD=0.15, 95% confidence degrees) in early late Carboniferous. Combined with previous researches, the authors suggest that the age of Dulunhe granite is consistent with small granites like Baogutu granite (Au-Cu mineralization) and Xiaerpu granite (Cu-Mo mineralization); both of them are probably formed in the subduction-related setting. This reliable age provides chronology constraints for the study of regional mineralization age that related to small granite and magma mixing of Au-Cu-Mo deposit.
- magma mixed granite,
- zircon U-Pb dating,
- mineralization age,
- Dulunhe granite,
- west Junggar

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Zircon U-Pb Age and Geological Significance of Dulunhe Granite in Tuoli, Western Junggar

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