This belt extends more than 200 km along the Kanggurtag shear zone, which separates the Est Tianshan (Jueluotage) orogenic belt from the Turpan-Hami basin. A number of mafic-ultramafic plutonic complexes occur near the contact between the Tousuquan-Dananhu arc and the northern side of the Kanggurtag shear zone. From west to east, these are the Hongling, Tudun, Erhongwa, Xiangshan, Huangshan, Huangshannan, Huangshandong, Hulu and Tula'ergen complexes. Most of the plutons host economic Cu-Ni sulfide mineralizations. Exposed plutonic rocks include peridotite, lherzolite, pyroxenite, gabbro, and diorite. The orebodies are located near the base of the ultramafic rock sequence that is dominated by lherzolite and pyroxenite. Most plutons have multiple stages of intrusion, or intrusive facies, possibly resulting from differentiation of the same magma, and display gradational relationships, but locally show intrusive contacts. Ore veins also are occasionally present, but are sub-economic. The disseminated ores are commonly low-grade, with combined Cu+Ni grades rarely exceeding 1%. The associated wall-rock alteration is dominated by amphibole and chlorite, and weak development of talc, serpentine, and tourmaline.
References
- Jingwen Mao, Goldfarb, R.J., Yitian Wang, Hart, C.J., Zhiliang Wang, and Jianmin Yang (2005): Late Paleozoic base and precious metal deposits, East Tianshan, Xinjiang, China: Characteristics and geodynamic setting. Episodes 28(1), 23-36.
- Jingwen Mao, Pirajno, F., Zuoheng Zang, Fengmei Chai, Hua Wu, Shiping Chen, Linsong Cheng, Jianmin Yang, and Changqing Zhang (2007): A review of the Cu-Ni sulphide deposits in the Chinese Tianshan and Altay orogens (Xinjiang Autonomous Region, NW China): Principal characteristics and ore-forming processes. Journal of Asian Earth Sciences (in press).
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