斑岩型铜矿床地球化学勘查中岩石化学指标  

PETROCHEMICAL INDICES IN GEOCHEMICAL EXPLORATION OF PORPHYRY TYPE COPPER DEPOSITS

作　　者：弓秋丽[1] 朱立新[2] 马生明[1] 席明杰[1] 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [2]中国地质科学院,北京100037

出　　处：《物探与化探》2009年第1期31-34,共4页Geophysical and Geochemical Exploration

基　　金：国家科技支撑计划课题(2006BAB01A10);中国地质调查局地质大调查项目(1212010660404)联合资助

摘　　要：依据江西城门山和内蒙古乌努格吐山2个斑岩型铜矿床试验资料,探讨了用于斑岩型铜矿床勘查的岩石化学指标。结果表明,常量化学组分MgO、CaO和Na2O等在斑岩型矿化体中的含量显著低于其在中酸性岩中的丰度值,w(Na2O)/w(K2O)、w(CaO)/w(MgO)值随Cu矿化强度增强有规律地变化,可以有效指示斑岩型矿化体的存在及其矿化强度。此项成果丰富了地球化学勘查指标。Based on data obtained from the Chengmenshan porphyry copper deposit in Jiangxi and the Wunugetushan porphyry copper deposit in Inner Mongolia, the authors investigated the petrochemical indices for the exploration of porphyry copper deposits. It is shown that the contents of such common chemical components as MgO, CaO and Na2O are obviously lower than their abundances in immediate-acid rocks, whereas w （ Na2O ）/w （ K2O ） and w （ CaO ）/w （ MgO ） ratios vary regularly with the increasing Cu mineralization intensity. These results can effectively indicate the existence of porphyry mineralized bodies and their mineralization intensity and greatly enrich the geochemical exploration indices.

关 键 词：斑岩型铜矿床 地球化学勘查 岩石化学指标 

分 类 号：P632[天文地球—地质矿产勘探]