Fluid inclusion and stable isotope (H–O–S–Pb) constraints on the genesis of the Haxi gold deposit, west Junggar, China

IF 2.3 Q3 GEOSCIENCES, MULTIDISCIPLINARY Journal of Asian Earth Sciences: X Pub Date : 2023-01-01 DOI:10.1016/j.jaesx.2022.100131
Lei Jiang , Xingxing Duan , Zuohuai Yang , Liang He , Yue Dong , Ying Wang
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准噶尔西部哈西金矿床成因的流体包裹体和稳定同位素(H–O–S–Pb)约束
哈西金矿床位于中国准噶尔西部哈图-萨尔托海成矿带,是一个新发现的金矿床,探明储量约10吨,平均品位6.70克/吨。该矿床主要赋存于石炭世早期的泰勒古拉组,受北东向安齐断裂控制。金矿体含有含金石英脉和蚀变玄武岩。矿石矿物以丰富的硫化物为主,如黄铁矿、毒砂、黄铜矿和少量gersdorfite。迄今为止,已确定石英脉中的流体包裹体有三种类型:液-气(V型)、CO2-H2O(C型)和富液(L型)。成矿流体表现出226°C–325°C的中等均匀化温度(Th),2.24–9.34 wt%NaCl当量的低盐度和0.72至0.88 g/cm3的低密度。δD值范围为−115.3‰至−100.7‰,平均值为−109.1‰;δ18O值范围为11.3‰~12.2‰,平均值为11.8‰;硫化物中的δ34S值在0.3‰至1.8‰之间,平均值为1.2‰。硫化物中206Pb/204Pb、207Pb/204Pc和208Pb/204Pd的平均值分别为18.059、15.547和37.996。总之,成矿流体不是来自单一来源,而是来自晚期岩浆-热液流体与古大气水的混合;成矿物质主要来源于壳幔混合源。利用Hautman公式计算的Pb模型年龄为347–365Ma,推测成矿期可能为泥盆纪-石炭系。
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来源期刊
Journal of Asian Earth Sciences: X
Journal of Asian Earth Sciences: X Earth and Planetary Sciences-Earth-Surface Processes
CiteScore
3.40
自引率
0.00%
发文量
53
审稿时长
28 weeks
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