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里伍铜锌矿床位于四川省甘孜州九龙县,处于康滇地轴西侧,松潘-甘孜造山带东南缘,北东向木里-锦屏弧形推覆构造带北西侧后缘;为一中型富铜锌多金属矿床,矿体出露于前震旦系里伍岩群(Pt2l)变质杂岩穹隆体中。里伍、黑牛洞-大水沟、柏香林、挖金沟、中咀及笋叶林等矿段矿体呈似层状、透镜状产出,矿体边界受里伍岩群滑脱构造和S3面里控制。分析结果显示,含矿石英中包裹体的氢、氧同位素δ18 O值为-8.79‰～13.93‰,平均为0.58‰,变化范围为22.72‰;δD的值为-64.10‰～-98.30‰,平均为-59.64‰,变化范围为34.20‰。具有稳定的岩浆水、变质水特征;而包裹体成分中富Na+、Ca2++Mg2+、贫K+,富Cl-、贫F-与SO42-,富CO2气体的特征,表明成矿热液具有来源于深部热卤水及海水等的多源特征;测得成矿期蚀变黑云母40 Ar/39 Ar同位素年龄值为135.52Ma±0.82Ma,与江浪穹隆似斑状黑云母花岗岩侵入体的K-Ar同位素年龄(131Ma±5Ma)及锦屏推覆体剪切带云母K-Ar同位素年龄(129 Ma～120 Ma)接近,表明主成矿作用与区域构造-岩浆热事件同期。综合分析认为里伍铜锌矿床为海相沉积-变质硫化矿床,矿床成矿物质具多源性,成矿过程具多期次,矿床受地层构造控制明显,矿源层叠加多次岩浆-构造作用而成矿,燕山中晚期为区域重要的成矿阶段。
The Liwu copper-zinc deposit is located in Jiulong County, Ganzi Prefecture, Sichuan Province, and is located on the west side of the Kang-Dian axis and on the southeast margin of the Songpan-Garzê orogenic belt and on the north-western margin of the Muli-Jinping arc nappe structure belt Medium-sized copper-zinc-rich polymetallic deposits, the ore body exposed in the former Sinian in the Wuyue Group (Pt2l) metamorphic complex dome. Liwu and Heiudong - ore blocks in Dashuigou, Baixianglin, Dugonggou, Zhongzui and Shuguanglinlin are in a stratified and lenticular shape with ore body boundary being controlled by the rivulet group SLS and S3 In control. The results show that the δ 18 O values of hydrogen and oxygen isotopes in ore-bearing quartz inclusions range from -8.79 ‰ to 13.93 ‰ with an average of 0.58 ‰, with a variation range of 22.72 ‰ and δD values of -64.10 ‰ to -98.30 ‰, with an average of -59.64 ‰, with a variation of 34.20 ‰. It has the characteristics of stable magmatic water and metamorphic water. However, the characteristics of inclusions rich in Na +, Ca2 + + Mg2 +, K +, Cl-, lean F- and SO42- enriched CO2 gas indicate that the ore-forming hydrothermal fluids are derived from Deep hot brine and seawater, etc. The 40Ar / 39Ar isotopic age of altered biotite during the mineralization is 135.52Ma ± 0.82Ma, which is similar to the K-Ar of porphyrite-biotite granite intrusions The isotopic age (131Ma ± 5Ma) and the K-Ar isotopic ages (129 Ma ~ 120 Ma) of the mica in the Jinping nappe shear zone are close to each other, indicating that the main mineralization is consistent with the regional tectono-magmatic event. The comprehensive analysis shows that the Liwu copper-zinc deposit is a marine sedimentary-metamorphic sulfide deposit, the ore-forming materials are multi-sourced, the metallogenetic processes are multi-stage, the deposit is controlled by the stratum structure, and the source beds are superimposed with several magmatic-tectonic processes The metallogenetic, late Yanshan area is an important metallogenic stage.