青海托莫尔日特金矿区断裂构造地球化学特征  

Study on tectono-geochemistry of ore-controlling faults in Tomorite gold deposit region,Qinghai province

作　　者：张拴宏[1] 周显强[1] 田晓娟[1] 宋友贵[1] 于宏东[2] 

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]中国地质大学地球科学与资源环境学院,北京100083

出　　处：《黄金地质》2001年第1期33-38,共6页Gold Geology

基　　金：原地质矿产部定向科研基金!资助项目 (地科定 97 2 2 )

摘　　要：从异常分布、成矿元素及微量元素在断裂带中的分布规律 ,对青海托莫尔日特金矿区控矿断裂带构造地球化学特征进行了详细研究。NW—NWW向断裂带控矿作用非常明显 ,特别是横穿乌达热乎、赛坝沟延伸到嘎顺一带的韧 脆性剪切带是区内最为主要的控矿构造之一。该带不但控制异常的平面分布 ,而且对成矿元素及微量元素的空间分布都有明显的影响。系统的构造地球化学剖面和不同变形类型岩石中成矿元素及微量元素含量的对比表明 ,NW—NWW向韧 脆性剪切带内Au、Cu等成矿元素的富集非常明显 ,并且有一定的相关性 ;微量元素的分布也表现出一定的规律 ,断裂带的韧性和脆性变形对微量元素的分布与聚集有不同的影响。On the base of the distribution of geochemical anomalies, ore forming elements and minor elements, tectono geochemistry of ore controlling faults in Tomorite gold deposit region in Qinghai province have been studied in this paper. The results show that the NW—NWW trend fault zones play an important role on the enrichment of ore forming elements and formation of the ore bodies, especially the ductile brittle shear zones from Wudarehu to Gashun, which are the most important ore controlling structures in the area. The shear zones not only control the location of geochemical anomalies but also have much effect on the distribution of ore forming elements and minor elements.Study on tectono geochemical sections and comparison of ore forming elements and minor elements from rocks with different kinds of deformation shows that the enrichment of ore forming elements such as Au and Cu in the brittle ductile shear zones is very apparent, and variation of Au and Cu contents is harmonious. It also shows that the distribution of minor elements has certain rules, and different kinds of deformation (such as ductile deformation and brittle deformation) have different influence on the distribution and enrichment of elements.

关 键 词：金矿床 构造地球化学 韧-脆性剪切带 青海 成矿元素 微量元素 聚集规律 

分 类 号：P618.51[天文地球—矿床学] P59[天文地球—地质学]