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    ZHU Xiang-ping, FENG Xiao-liang, YAO Peng, ZHANG Hui-hua, MA Dong-fang, HU Ru-quan, TANG Gao-lin. Sm-Nd age dating of garnet from the Heiniudong copper deposit in the Liwu copper mining district,western Sichuan[J]. Sedimentary Geology and Tethyan Geology, 2010, 30(1): 85-88.
    Citation: ZHU Xiang-ping, FENG Xiao-liang, YAO Peng, ZHANG Hui-hua, MA Dong-fang, HU Ru-quan, TANG Gao-lin. Sm-Nd age dating of garnet from the Heiniudong copper deposit in the Liwu copper mining district,western Sichuan[J]. Sedimentary Geology and Tethyan Geology, 2010, 30(1): 85-88.
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    Sm-Nd age dating of garnet from the Heiniudong copper deposit in the Liwu copper mining district,western Sichuan

    • 1. Chengdu Institute of Geology and Mineral Resources, Chengdu 610081, Sichuan, China;

    • 2. Liwu Copper Mining Company, Garze 626200, Sichuan, China

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    • Published Date: March 29, 2010
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      • Abstract
    • The Heiniudong copper deposit in the Liwu copper mining district is a newly found Cu-rich deposit in western Sichuan,and characteristic of polyphyletic,polyphase and polygenetic origins.Three phases of garnet are found in this deposit.Both the earliest garnet as bands along schistosity and subsequent one as grains are found to be filled by sulfides along fractures or around the grains.The latest garnet occurs as fine-grained crystalloblasts,and gives a Sm-Nd age of 101±26 Ma and an initial 143Nd/144Nd value of 0.511765±0.000025,which may be the age of the latest medium-to high-grade metamorphism.On the basis of the 39Ar/40Ar ages of biotite from the Heiniudong copper deposit(136.4±0.8 Ma) and Zhongzui copper deposit(143.4±1.9 Ma),and emplacement age of granites(K-Ar age of 131±5 Ma),the mineralization in individual deposits of the Liwu copper mining district has gone through a long period(15~20 Ma) of hydrothermal processes.
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