中蒙边境及邻区斑岩型铜矿床地质特征及成因  

Geological Features and Origin of Porphyry Copper Deposits in China-Mongolia Border Region and Its Neighboring Areas

作　　者：聂凤军[1] 江思宏[1] 张义[1] 刘妍[1] 胡朋[1] 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037

出　　处：《矿床地质》2004年第2期176-189,共14页Mineral Deposits

基　　金：国家自然科学基金项目 (编号 :40 0 73 0 15 );国家地质调查项目 (编号 :K1.3 .3 2和 2 0 0 3 10 2 0 0 0 0 1_0 1)部分研究成果

摘　　要：依据金属矿床围岩岩性组合和成矿作用特征 ,将中蒙边境及邻区分布的斑岩铜矿床 (点 )划分为 3种类型 :①加里东期经典型斑岩铜矿床 (点 ) ;②海西期经典型和火山岩型斑岩铜矿床 ;③燕山期深成岩型和火山岩型斑岩铜矿床。在较详细剖析各类金属矿床 (点 )基本地质特征的基础上 ,划分了 9个矿化集中区 ,并讨论了区域地壳演化与金属成矿作用的关系。研究结果表明 ,尽管研究区内的金属矿床 (点 )成矿作用分别发生在加里东期、海西期和燕山期 ,但是大规模成矿作用发生的时间与海西期板块构造活动的高峰期相吻合 ,是地壳特定演化阶段构造_岩浆活动的产物。The China-Mongolia border region and its neighboring areas are located at the convergence zone of Siberian platform, Tarim plate and North China craton, and serve as one of the most important copper metallogenic provinces in the world. Deep-seated faults, Paleozoic igneous rocks and porphyry copper deposits (ore spots) are well developed in this region due to the multiphase Paleozoic orogenic events. The porphyry copper deposits there can be classified into three types in terms of their host rocks and ore-forming periods: (1) Caledonian classic porphyry copper deposits, (2) Hercynian classic and volcanic porphyry copper deposits, and (3) Yanshanian plutonic and volcanic porphyry copper deposits. Based on systematic studies of the representative porphyry copper deposits, the authors have recognized nine mineralization concentration camps, i.e., southern margin of Altay Mountain (A), Kuruktag (B), Beishan Mountain (C), Oyu Tolgoi-Tsagaan Suvarga (D), Bainaimiao-Gunawusu (E), Erenhot-Dong Ujimqin Qi (F), Duobaoshan-Tongshan (G), Wunugetu-Badaguan (H) and Lianhuashan-Budunhua (I). Among these nine camps, porphyry copper deposits occurring within Camps D and G are spatially and temporally associated with Caledonian granitoid porphyry intrusions, whereas the deposits located in Camps A, B, C, D and F are related to Hercynian granitoid porphyry intrusions. In contrast, the porphyry copper deposits of Camps H and I occur generally within the Yanshanian granitod porphyry intrusions and their wall rocks. The relationship between the crustal evolution and the metallogney can be summarized as follows: (1) in Early Paleozoic stage, Caledonian tectono-magmatism caused by early subduction of ancient Mongolian oceanic plate and North China craton resulted in the formation of several classic porphyry copper deposits; (2) in Late Paleozoic stage, a great number of classic and volcanic porphyry copper deposits were formed by Hercynian tectono-magmatism due to the multiple collision and subduction of various plates and blocks; (3) i

关 键 词：地质学 斑岩铜矿 床矿床地质特征 岩浆活动 成矿作用 时空分布 中蒙边境 

分 类 号：P618.41[天文地球—矿床学]