论文部分内容阅读
该矿床是一个新矿床类型，成矿作用分为磁黄铁矿－黄铁矿、辉碲铋矿和黄铁矿－黄铜矿三个阶段。矿化围岩为三叠纪镁铁质火山岩。在矿脉周围广泛发育有以黑云母、白云母、石英和斜长石为代表的蚀变及分带，磁黄铁矿和辉碲铋矿的硫同位素值δ￣（３４）Ｓ＝－１．７‰－２．８‰，白云石和方解石的δ￣（１３）Ｃ＿（ＰＤＢ）＝－５．３‰－－７．４２‰，δ￣（１８）Ｏ＿（ＳＭＯＷ）＝１０．９‰－１３．１‰。根据以硅质、碱质和富挥发组分为特征的围岩蚀变和Ｓ、Ｏ、Ｃ同位素信息，表明大水沟碲矿床的成矿物质来源与岩浆有关。
The deposit is a new type of deposit. The mineralization is divided into pyrite - pyrite, telluride bismuth ore and pyrite - chalcopyrite three stages. The mineralized rocks are Triassic mafic volcanic rocks. The alteration and zonation of biotite, muscovite, quartz and plagioclase are widely developed around the veins. The δ (34) S = -1 sulfur isotope value of pyrrhotite and telluride bismuth ore. 7 ‰ -2.8 ‰, δ ~ (13) C_ (PDB) of dolomite and calcite = -5.3 ‰ - 7.42 ‰, δ ~ (18) O_ (SMOW) = 10.9 ‰ -13 .1 ‰. Based on the information of wall rock alteration and S, O and C isotopes characterized by siliceous, alkaline-base and volatile-rich components, it indicates that the source of ore-forming materials of Dashuigou tellurium ore deposit is related to magma.