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青海都兰埃肯德勒斯特铜钼床斑岩体特征
引用本文:湛守智,;陈海福,;李连松.青海都兰埃肯德勒斯特铜钼床斑岩体特征[J].土工基础,2014(5):74-78.
作者姓名:湛守智  ;陈海福  ;李连松
作者单位:[1]青海省地质矿产开发局,西宁810012; [2]青海省第五地质矿产勘查院,西宁810010
摘    要:对埃肯德勒斯特铜钼矿地质特征及含矿斑岩体的地球化学特征研究表明,岩体中和围岩中的矿化具有相同的特征,黄铜矿和辉钼矿都处于岩石裂隙之中,成细脉状产出,与石英脉紧密伴生,矿化体均属于斑岩型铜钼矿的特征,成矿物质来源为斑岩体,花岗斑岩体呈岩珠状产出,花岗斑岩岩石中SiO2含量较高,均大于72%,属酸性岩;稀土总量较低,轻稀土富集,分馏程度较好,重稀土相对亏损,且分馏程度较弱。Eu元素出现较为明显的"V"字形负异常,主要反映了壳源物质局部熔融的特征;微量元素Ba、Rb、Th、K显著富集;La、Ce、Zr、Hf等元素次富集,其它元素亏损。对该区已形成的资料进行系统综合研究,分析矿区成矿地质特征和成矿模式,最终实现该地区的找矿突破,带动整个地区斑岩型铜矿矿床的找寻。

关 键 词:花岗斑岩  地球化学  埃坑德勒斯特  铜钼矿  青海

Rock Mass Characteristics of Porphyry Copper-Molybdenum Mine in Ekendrest,Qinghai
Affiliation:ZHAN Shouzhi,CHEN Haifu,LI Liansong(1. Qinghai No. 5 Geological Investigation Institute, Xining, 810012 ; Bureau of Geological Exploration and Development of Qinghai Province, Xining 810010)
Abstract:The Ekendrest Copper-Molybdenum Mine is located in a complex broken geologic zone at the east side of South Qunlun Mountains.The mine bedrock outcrop belongs to Triassic Flood Chuan Group.The orientation of the rapture is predominantly in the North-West direction,and then North-East and close to South-North directions.Among these rapture directions,the raptures in the North-West direction have a large quantity and a long development period.They formed broken zones with different sizes near the ground surface and they directly influenced the space distribution of bedrock strata,ignite rock mass and mine porphyry rock mass.This paper present the geological properties and geo-chemical properties of the porphyry copper-molybdenum rock mass of Ekendrest Mine.The results indicate that,the mine-strip in the rock mass and its surroundings have similar geological characterizations,that is,both the chalcopyrite and molydbenite are deposited in the fissures of the rock mas in small strips and usually combined with quartzite crystals.The mine strips have the properties of copper-molybdenum in porphyry rock mass.The porphyry rock mass is the source of the mine.The acidic porphyry granite rock mass has a beaded output with a higher than 72% of SiO2 contents.The total content of rare earth is relatively low but with a higher concentration of light rare earth elements and strong fractionation.The heavy rare earth elements,however,is relatively absent with a weak fractionation.An obvious " V" shape distribution of the Eu element can be found in the mine,which is the reflection of the local melting of the shell-source materials.The rare earth elements,Ba,Rb,Th,and K have an obvious concentration.The next concentration elements are:La,Ce,Zr and Hf.The other elements are relatively absent.A comprehensive study on geological characteristics of the mining producing using the the existing data of the Ekendrest Mine,new mine locating method can be developed and therefore,leads to a better understanding and mine locating of the ent
Keywords:Prophyry Granite  Geo-Chemistry  Ekendrest  Copper-Molybdenum Mine  Qing hai
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