甘肃白马山金矿床成因初探  

Study on the Genisis of the Baimashan Gold Deposit,Gansu Province

作　　者：柳世强 王建中[1] 党满宏 樊五杰[1] 王淑娟[1] 

机构地区：[1]武警黄金第五支队,陕西西安710100

出　　处：《黄金科学技术》2013年第4期32-38,共7页Gold Science and Technology

摘　　要：白马山金矿床位于南秦岭南成矿亚带。矿体呈NE向"雁列式"展布,受地层(灰岩、板岩)和NE向次级断裂的复合制约,NE向次级断裂是矿区主要的控矿因素(构造),矿体赋存于灰岩与大理岩的接触部位以及板岩中。热液蚀变主要为黄铁矿化、大理岩化和绿泥石化。金以显微金为主,偶见自然金。通过对比白马山金矿与大桥和鹿儿坝卡林型金矿的特征发现,这些矿床在Au-Ag-As-Sb元素组合、矿石矿物组合和蚀变矿物组合等诸多方面具有一定的相似性,显示矿床具有"低温热液成矿"的特点,因此,白马山金矿床更接近于卡林型金矿,而与造山带金矿、岩浆热液型金矿区别较大。结合南秦岭区域地质背景和卡林型金矿的最新研究进展,推测白马山金矿床可能为断层型(类)卡林型矿床,建议下一步工作应重点围绕NE向次级断裂开展。The Baimashan gold deposit is located in the south ore-forming sub-beh of the southern Qinling Moutains area.Moutains The Ore body is en echelon distribution taking on NE,and compoundly cot^trolled by the stratum （limestone,slate） and NE to the second-order faults,which is the main ore-controlling factors（structure）. Ore bodies occur in contact regions of the limestone and marble and the slate.Hydrothel-mal alterations are mainly pyrite, marbleization and chloritization.Gold is given priority to with microscopic gold,accidentally see natural gohl. By comparing the t^atures of Baimashan gold deposit with the carlin-type gold deposit of Daqiao,Luerba and Shuiyindong,l}mnd that these deposits have a certain similarity in Au-Ag-As-Sb elements combination,ore mineral composition and altered mineral combination,and showed the deposit with the epithermal ore forming characteristics.Therel}）re,Baimashan gold deposits is more close to the carlin-type gold deposit,and has a big dill）fence for the orogenic gold doposit and the magmatic-hydrothermal gold deposits.Combined with the geological

关 键 词：浅成低温 矿床成因 卡林型金矿 白马山金矿 甘肃省 

分 类 号：P618.51[天文地球—矿床学]