内蒙东部红花沟金矿田早中生代构造-岩浆活动及对金成矿的控制作用  

TECTONIC AND MAGMATIC ACTIVITIES IN EARLY MESOZOIC AND THEIR CONTROLLING ON GOLD MINERALIZATION IN HONGHUAGOU GOLD ORE FIELD, INNER MONGOLIA

作　　者：佘宏全[1] 徐贵忠[1] 周瑞[1] 王艺芬[1] 颜丹平[2] 杨振德[1] 杨忆[3] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国地质大学地球科学与资源学院,北京100083 [3]中国科技大学研究生院,北京100039

出　　处：《现代地质》2000年第4期408-416,共9页Geoscience

基　　金：国家重点基础研究项目!(编号 :G19990 432 0 7);国家攀登计划预选项目!(编号 :95 -预 -2 5 )

摘　　要：根据红花沟金矿田早中生代的韧性变形带、闪长质岩浆岩和中基性岩墙群的特点 ,提出早中生代时研究区总体上处于伸展隆升状态 ,并可细分为两个阶段 ,早阶段以韧性变形为主 ,晚阶段以闪长质岩浆活动为主。闪长质岩浆是在地幔热隆起构造背景下 ,地幔底侵作用引起太古界变质岩中的基性岩石发生部分熔融而形成的。早中生代的构造 -岩浆活动为金成矿提供了流体和成矿物质来源及容矿空间 ,金成矿主要与早中生代的构造 -岩浆作用有关。Based on the studies of the ductile zone, diorite and mafic intermediate dyke swarms of Early Mesozoic, the authors present that the studied area was in extensional uplift state in Early Mesozoic. The extension procession could be divided into two stages, dominated by ductile metamorphose at early stage, featured by the intrusion of diorite and the emplacement of dyke swarms at late stage. Diorite magma was resulted from the partial melting of Archean plagio amphibolite, caused by the magmatic underplating in the condition of mantle upheaval. The tectonic and magmatic activities in Early Mesozoic provided the fluids and minerogenetic materials for the gold deposits as well as the space for the precipitation and concentration of gold ores. The formation of gold deposits were related with tectonic and magmatic activities in Early Mesozioc.

关 键 词：金矿床 早中生代 构造-岩浆活动 成因 闪长岩 

分 类 号：P618.510.1[天文地球—矿床学] P534.5[天文地球—地质学]