昆山钼铜矿床酸性侵入岩的岩石化学特征及地质意义  

Petrochemistry Characteristics and Geological Significance of Acidic Intrusive Rocks in Kunshan Molybdenum Copper Deposit

作　　者：江丽[1] 潘家永[1] 江媛媛[1] 程建兵 JIANG Li;PAN Jiayong;JIANG Yuanyuan;CHENG Jianbing(College of Earth Sciences, East China Institute of Technology, Nanchang 330013, China;The People's court of Yugan, Shangrao 335100, Jiangxi, China)

机构地区：[1]东华理工大学地球科学学院,南昌330013 [2]余干人民法院,江西上饶335100

出　　处：《能源研究与管理》2016年第4期11-18,共8页Energy Research and Management

摘　　要：昆山钼铜矿床属于石英脉带型铜钼矿床，成矿元素铜、钼、钨互为伴生出现，在空间上常常互相交替和重叠出现，构成复合矿体。岩石化学特征研究表明：(Al2O3)为11.75%～17.93%，均值14.81%，高于中国花岗岩平均值14%，A/NK比值范围为3.469%～1.604%，均值2.023%，A/CNK变化范围1.162%～3.272%，均值1.682%。(K2O)/(Na2O)为1.076%～5.884%，均值2.277%；里特曼指数值为1.350%～2.953%，结果表明该岩体属高钾过铝质钙碱性花岗岩。一般幔源未分异的原生岩浆的(Si)逸40%，而(Si)＜40%的都是幔源岩浆经分异而成，昆山钼铜矿床(Si)为2.544%～14.401%，平均值6.548%，固结指数迅速降低，岩浆结晶分异彻底，说明岩性的酸性程度要高。通过利用主量元素特征来投图并分析花岗岩的形成环境可得成构造环境主要为活动大陆边缘岩浆弧和（或）岛弧环境（太平洋区），花岗岩属于I型花岗岩。Kunshan molybdenum copper deposit belongs to quartz vein zone type of copper molybdenum deposit, ore-forming elements copper, molybdenum and tungsten are associated, alternate and overlapping each other often appear in the space,constitute a complex ore body. According to the study of the chemical characteristics of rocks show that the (Al2O3) content 11.75%-17.93% , the average of 14.81%, higher than the average Chinese granite 14%, A/CNK area ratio 3.469%-1.604%,the average of 2.023%, A/CNK range 1.162%-3.272% , the average of 1.682%. (K2O)/ (Na2O) content 1.076%-5.884% ,the average 2.277%. Terman index value is 1.350%-2.953% , the results show that the rock mass is a high potassium calcium alkaline peraluminous granite. Original basaltic magma consolidation index (Si) as the crystallization differentiation,residual magma evolution in the direction of the lean MgO style, average from 2.544% -14.401% , reduce rapidly.Consolidation index falling rapidly, the lithology of the acid degree is higher. By taking advantage of the characteristics of the main elements to cast graph and analysis of the forming environment of granite can get into magmatic arc tectonic environment mainly for active continental margin and (or) island arc environment (Pacific area), belongs to the type I granites.

关 键 词：昆山钼铜矿 酸性岩 岩石化学特征 I型花岗岩 江西 

分 类 号：P618.65[天文地球—矿床学]