地质学报2012，Vol.86Issue(1)：209-218,10.DOI:11-1951/P.20120104.1640.001
新疆若羌县柯可卡尔德钨锡矿床地质特征与流体包裹体研究
Study of Geological Characteristics and Fluid Inclusions of the Kekekard W-Sn Deposit in Ruoqiang County, Xinjiang
摘要
Abstract
The Baiganhu tungsten ore field in southeastern Xinjiang Province is a large deposit discovered in recent decade. It consists of four tungsten-tin deposits: Awar, Bashierxi, Baiganhu and Kekekaerd (KK in short), with the KK being well-explored, large-scale one. Field investigation indicates that the W-Sn quartz veins of the KK deposit veins are characterized by twisting along the trend, echelon array, and flat attitude, and hydrothermal activities can be divided into three stages such as pre-ore, mineralized and post ore. Fluid inclusions consist of five types: G-L two phases, G-L-D three phases, CO2 or water single phase, CO_2-H2O three phases, and CO2-H2O-NaCl four phases. The first two types occur mainly in pre ore stage, with minor CO2G-L three phase type. Mineralization stage can be divided into early stage and late stage, with the early one being the major mineralization stage containing five inclusion types and the late one being weak sulfate mineralization containing G-L two phase type. Post-ore stage is dominated by G-L two phase type. Microthermometry and Ramman analyses show that the mineralized fluid compositions are dominated by H2O and CO2, with minor CH4 and N2. H-O isotopic compositions of fluid inclusions in the three type veins indicate that ore-forming fluid was a mixture of magmatic water, atmospheric water and metamorphic water. The deposit should be a magmatic hydrothermal deposit formed in the condition of high T and low-medium salinity. The fluid underwent fluid immiscibility and mixing, and this may be the leading factor for tungsten precipitation.关键词
钨锡矿床/地质特征/流体包裹体/同位素地球化学/流体不混溶/柯可卡尔德Key words
W-Sn deposit/ geological character/ fluid inclusion/ isotopic geochemistry/ fluid immiscibility/ Kekekaerde引用本文复制引用
李国臣,丰成友,王瑞江,李洪茂,周安顺,马圣钞,刘建楠,肖晔..新疆若羌县柯可卡尔德钨锡矿床地质特征与流体包裹体研究[J].地质学报,2012,86(1):209-218,10.基金项目
本文为国家自然科学基金项目(编号41172076)、中国博士后科学基金项目(编号20090460132)、国土资源部"百人计划"项目、中国地质调查局地质调查项目(编号1212011085528)和中央级公益性科研院所基本科研业务费专项资金项目(编号K0901)资助的成果. （编号41172076）
