| 青海东昆仑卡尔却卡多金属矿区斑岩型铜矿的流体包裹体研究 |
| 点此下载全文 |
| 引用本文：LI ShiJin,SUN FengYue,WANG Li,LI YuChun,LIU ZhenHong,SU ShengShun,Wang Song.2008.Fluid inclusion studies of porphyry copper mineralization in Kaerqueka polymetallic ore district, East Kunlun Mountains, Qinghai Province[J].Mineral Deposits,27(3):0 |
| Hits: 2719 |
| Download times: 2104 |
|
| 基金项目:国家地质调查项目（1212010531403）;“十一五”国家科技支撑计划课题（2006BAB01A06） , 国家科技支撑计划 |
|
| 中文摘要:卡尔却卡铜多金属矿床是青海省地质调查院于近几年在东昆仑西段祁漫塔格地区新发现的一个矿床,目前规模已达中型.文章通过对矿区西北部受岩体断裂破碎蚀变带控制的铜矿体中石英流体包裹体岩相学、显微测温和激光拉曼探针成分分析,表明铜矿化石英脉中发育气液两相、富气相、含子矿物三相、纯液相和纯气相5类包裹体;气液两相和含子矿物三相流体包裹体的盐度差异明显,但它们的均一温度比较一致(320～440℃),反映在成矿流体演化过程中发生了强烈的流体不混溶,对成矿起重要作用;流体包裹体气相成分主要为H2O和CO2,其次为CH4、N2、H2、H2S及烃类.综合流体包裹体研究和矿化、蚀变等地质特征,笔者认为矿区西北部矿化应为与高中温岩浆热液作用有关的斑岩型铜矿化,它与区内强烈发育的铜铅锌多金属矽卡岩矿化均为同一构造-岩浆作用的产物. |
| 中文关键词:地质学 流体包裹体 岩浆流体 斑岩铜矿 矿床成因 卡尔却卡 东昆仑 |
| |
| Fluid inclusion studies of porphyry copper mineralization in Kaerqueka polymetallic ore district, East Kunlun Mountains, Qinghai Province |
|
|
| Abstract:The Kaerqueka polymetallic ore deposit, located in Qimantage area within the western part of East Kunlun Mountains, is a medium_sized ore deposit discovered by Qinghai Geological Survey in recent years. The authors studied copper ore bodies controlled by the fractured alteration zone of the rock body in northwest ore district by such means as petrographic analysis, microthermometry and laser Raman microprobe analysis of fluid inclusions. As a result, five types of fluid inclusions were found in the copper mineralized quartz veins, i.e., two_phase liquid_vapor inclusions, gas_rich inclusions, daughter mineral_bearing three_phase inclusions, liquid inclusions and vapor inclusions. There exists a significant difference in salinity between the two_phase liquid_vapor inclusions and the daughter mineral_bearing three_phase inclusions, suggesting that strong fluid immiscibility must have taken place in the evolutionary process of the ore_forming fluids, which played an important role in mineralization. H2O and CO2 are dominant in the fluids, followed by CH4, N2, H2, H2S and hydrocarbons. Taking into account fluid inclusion features and geological characteristics of mineralization and alteration, the authors hold that porphyry_type copper mineralization in the northwest part of the ore district is related to high_middle temperature magmatic hydrothermal activities, and is the same tectonic_magmatic product as the polymetallic skarn mineralization. |
| View Full Text View/Add Comment Download reader |
|
|
|
