【作者】 丁枫；

【导师】 唐菊兴； 顾雪祥； 龙训荣；

【作者基本信息】 成都理工大学 ， 矿物学、岩石学、矿床学， 2004， 硕士

【摘要】 本文以西藏谢通门雄村铜金矿床作为研究对象，通过矿区的地质特征和地球化学特征的阐述，进而简单探讨了探讨矿床的成因类型及控矿条件，建立了矿区的找矿方向。 雄村铜金矿床处于冈底斯成矿带，矿床规模巨大，矿体主要赋存于白垩系火山岩地层第二岩性单元的黄铁绢英岩化硅化凝灰岩和第三岩性单元英安质疑灰岩中，上述岩石既是赋矿围岩又是矿化体。矿区内构造作用强烈，区内的“二断一背”控制着矿体的赋存状态。矿体主要产于北西、北东向的次级断裂中。区内构造、岩浆热液活动频繁，蚀变强烈，主要表现为硅化、绢云母化、钾化、绿帘石化、角岩化等。呈面型蚀变，分带特征明显。矿区内矿体规模巨大，矿石组构主要为以充填交代作用为主，矿石矿物主要为黄铁矿、黄铜矿、闪锌矿、方铅矿和银金矿。而且矿物的标型特征显示了低温成矿的特点。 通过对矿床的常量元素、微量元素、稀土元素、流体包裹体特征、氢氧同位素、硫同位素、铅同位素等特征的研究，认为成矿物质主要来源于上地幔，与周围岩石存在着同源的可能性，后期有一定的上地壳物质混入，成矿作用有三期，分别与区内的花岗岩、二长花岗岩脉、云煌岩脉有关。其构造环境主要为火山弧地区。矿床的形成与大规模的构造运动有关。成矿的温度和压力都比较低，矿床的成因类型为浅成低温热液矿床。矿体主要形成时代中新世。 通过野外观察及室内收集整理资料，对雄村矿床的控矿因素进行了论述，进一步确定了该矿床的成矿机制。雄村矿床成矿主要受到矿区内的火山凝灰岩岩和二级构造来控制。它的成矿机制与构造运动有关。 同时对矿区进行物化探分析，根据物化探资料，对今后的工作和进一步的找矿方向提出了建议。通过时间域激发极化法测量，表明本区铜金矿体具有规模大，厚度大的特点，走向上向北东和南西两个方向延伸，深度达200米以上。1：1万土壤地球化学测量表明矿区金、银、铜、铅、锌等元素具有强度大，套叠好的特点。雄村铜金矿床具有非常大的成矿潜力。更多还原

【Abstract】 This paper takes Xiongcun copper-gold ore deposit, which is located in XieTongMen County of Tibet, as its research object. Through analyzing the geological and geochemical feature, author probe into the genetic classification and controlling requirements of this deposit, providing an exploration orientation for future.Xiongcun copper-gold ore deposit is located in Gangdese Metallogenetic Belt with a large scale. The ore body mainly exists in the second lithoid unit’s tuffs and the third lithoid unit’s dacite tufa of the Cretaceous Volcanic Stratum, which are not only mother rock but also mineralized body. The structure of "Two Faults with one Fold " controls the ore body with the existence of intensive structure movement. The ore body is mostly produced in the secondary fracture zone of North-West direction. There are intensive structural and magmatic hydrothermal movement with obvious zonal surface shape alterations, which are demonstrated by silicified function, sericitization, potassium, epidotization, hornstone, etc. The ore structural fabric mainly behaves in form of filling action with minerals such as pyrite, chalcopyrite, salenite, blende and electrum, which typomorphic feature shows a hypothermal pattern of metallogeny.Through the study of characteristic of macroelement, microelement, rare-earth element, oxyhydrogen isotope, sulfur isotope, lead isotope, fluid inclusion etc, a conclusion can be drawn that metallogenic substance comes from the upper mantle with mixing of some substance from the upper crust latter. It is likely to have the same source with the surrounding rock. Their structural environment is mainly volcanic arc. The formation of the ore deposit is relevant to the structural activities. Both the metallogenic pressure and temperature are relatively lower, and the genetic classification of the ore deposit is epithermal deposit. The formation time of the ore body is mainly the late Himalayan, and the formation is relevant to the structural movement of Himalayas.Tthrough field inspection and indoor information collection, author expounds the controlling factors of Xiongcun ore deposit, and determines the metallogenic principle. The local volcanic tuff and the secondary structure mainly control the formation of this ore deposit, which metallogenic principle is relevant to the tectonic movements.In this paper, suggestion for the future work is given according to analysis of geochemical and geophysical data. Through time domain induced polarization method,it is obviously that this copper-gold ore body has a vast scales and a great thickness with a depth of more than two hundred meters. Soil geochemical measurement of one ten-thousandth scale indicates that the anomalies of gold, stiver, copper, lead have features of high intensity and well-lapped forms. Xiongcun ore deposit has great metallogenic potential.更多还原