乌拉嘎金矿床地质地球化学特征研究  

Characteristics of geology and geochemistry in Wulaga Gold Deposit

作　　者：王永祥[1] 吴国学[1] 白士俊[1] 韩洪伟[1] 吕志刚[1] 汪振涌[2] 

机构地区：[1]吉林大学地球科学学院 [2]黑龙江乌拉嘎金矿,黑龙江嘉荫153221

出　　处：《世界地质》2005年第4期338-343,共6页World Geology

摘　　要：乌拉嘎金矿矿体赋存于燕山晚期的斜长花岗斑岩与黑龙江群下亚群接触带附近的近东西向展布的构造角砾岩中,围岩蚀变强烈;金矿化主要受角砾岩带控制。矿床成矿微量元素组合为Au、Hg、As、Sb,且含量均呈向下递增的趋势。LaN/YbN值变化范围为14.146～28.311,稀土元素配分模式为右傾的轻稀土富集型;∑LREE1:65.76～62.68;∑HREE4:5.82～15.2;LREE/HREE为6.09～4.124,为轻稀土富集型。岩体中流体包裹体以低盐、低压且有天水加入为特征,为典型的浅成低温热液型矿床。Wulaga gold ore body exists basically in the E-W trending structural breccia contact belts of late Yanshanian granite porphyry with the lower subgroup of Heilongjiang Group, where the wall rock strongly alterated. Gold mineralization is mainly controlled by the breccia belts. The combination of trace elements consists ofAu, Hg, As, Sb. LaN/YbN： 14.146-28.311. The lanthanon distribution pattern is characterized by rightinclining type with enrichment of light lanthanon; ∑REE; 165.76 -62.68; ∑ HREE：45.82 -15.2; LREE/HREE： 6.09 -4.124. The deposit shows typical epithermal gold ones with characteristics of low salt, low pressure, and accession oftural water according to the test result of fluid inclusion samples.

关 键 词：乌拉嘎金矿 地质地球化学特征 微量元素 稀土元素 流体包裹体 

分 类 号：P595[天文地球—地球化学] P618.51[天文地球—地质学]