Axi Mine (Arxi Mine), Yining Co. (Ghulja Co.), Yili Hasake Autonomous Prefecture (Ili Kazakh Autonomous Prefecture), Xinjiang Autonomous Region, China

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Name(s) in local language(s): 阿希金矿, 伊宁县 (غۇلجا ناھىيىسى), 伊犁哈萨克自治州 (ئاپتونوم ئوبلاستىئىلى قازاق), 新疆维吾尔自治区, 中国

Low sulphidation epithermal gold deposit, hosted within a tilted succession of auto-brecciated andesitic lava flows and fragmental andesitic tuffs and breccias of the Lower Carboniferous Dahalajunshan Formation. The host rocks are unconformably overlain by conglomerate and coarse clastic sedimentary rocks of the late Early to Middle Carboniferous Aqialehe Group. The deposit consists of a northern and a southern orebody, that are located within a steep, east-dipping, curvilinear fault. The northern orebody is 480 m long, up to 20 m wide and extends for at least 450 m downdip. The southern orebody is located 750 m further south and 110 m lower than the northern orebody; it is only around 4 m wide, but is encompassed by a much wider zone of alteration and brecciation. The auriferous quartz of the northern orebody is dominantly chalcedonic and cryptocrystalline, druzy, sinter-like, and locally banded. The southern orebody is more diffuse, with extensive silicification and stockworking, and brecciation is also much more extensive. The dominant alteration in close proximity to the ore is strong silicification, with peripheral phyllic (sericite-pyrite) alteration passing outwards into widespread chlorite and carbonate alteration.

Note: Not to be confused withe the Axi gold deposit of Sichuan Province.

Mineral List

44 entries listed. 34 valid minerals.

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References

Lianhui Dong and Changlie Tian (2001): Geology of Tulasu-Yelimodun gold mineralization belt, western Tianshan, Xinjiang. Geology and Resources 10(2), 85-90, 101.

Lianhui Dong (2001): The Main Alteration Type of Axi Gold Deposit and Its Relationship to Gold Mineralization. Geology and Resources 10(3), 129-132.

Chen Yanjing, Bao Jingxin, Zhang Zengjie, Chen Huayong, and Liu Yulin (2003): Laumontitization as an Exploration Indicator of Epithermal Gold Deposits: A Case Study of the Axi and Other Epithermal Systems in West Tianshan,China. Chinese Journal of Geochemistry.

Hailiang Chang, Xiongwu Wang, and Taoye Li (2003): Discussion on "K-high" fluids in Axi and Shiyingtan epithermal gold deposits, Xinjiang. Mineral Deposits 22(2), 129-133 (in Chinese with English abstract).

Fang An and Yongfeng Zhu (2009): Geology and geochemistry of Axi gold deposit, Xinjiang. Mineral Deposits 28(2), 143-156 (in Chinese with English abstract).

Fuquan Yang, Jingwen Mao, Bierlein, F.P., Pirajno, F., Caisheng Zhao, Huishou Ye, and Feng Liu (2009): A review of the geological characteristics and geodynamic mechanisms of Late Paleozoic epithermal gold deposits in North Xinjiang, China. Ore Geology Reviews 35, 217-234.

Wei Zhai, Xiaoming Sun, Weidong Sun, Liwei Su, Xiaoping He and Youliang Wu (2009): Geology, geochemistry, and genesis of Axi: A Paleozoic low-sulfidation type epithermal gold deposit in Xinjiang, China. Ore Geology Reviews 36, 265-281.

Wei Zhai, Xiaoming Sun, Liwei Su, Xiaoping He, and Youliang Wu (2010): Axi gold deposit: A Paleozoic low-sulfidation type of epithermal gold deposit in Xinjiang, China. Earth Science Frontiers 17(2), 266-285 (in Chinese with English abstract).

External Links

http://www.portergeo.com.au/database/mineinfo.asp?mineid=mn1050

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