【摘要】 依据金属矿床围岩岩性组合和成矿作用特征,将内蒙古北山及邻区分布的各类金属矿床(点)划分为6种类型,即①斑岩型钼-金和铜矿床(点);②夕卡岩型铁-铜矿床(点);③火山气液型铁和锑矿床(点);④热液脉型钨、锡和稀有金属矿床(点);⑤岩浆岩型铬和钒-钛-铁矿床(点)和⑥变质热液型金和铁矿床(点)。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4个成矿带和9个矿化集中区,并且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:尽管本区金属矿床(点)成矿作用分别发生在前寒武纪和晚古生代,但是大规模成矿作用发生的时间与海西期板块活动高峰期相吻合,是地壳特定演化阶段构造-岩浆活动的产物。更多还原

【Abstract】 The Beishan Mountains, Inner Mongolia, and its neighbouring region is located at the convergence area of the Siberian, Kazakhstanian, Tarim and North China paleo - plates, and is one of the most important metallogenic provinces in China. Deep faults, Paleozoic igneous rocks and metallic deposits (prospects) are well developed in the region due to the multiphase Paleozoic orogenic events. All these metallic deposits can be classified into six types in term of their host rocks- (1) porphyry Mo (Au) and Cu deposits; (2) skarn Fe -Cu and Cu deposits; (3) Fe and Sb deposits occurring within volcanic terrain; (4) vein type W, Sn and rare metal deposits related to granitoids; (5) Cr, V, Ti and Fe deposits related to basic - ultrabasic intrusions; (6) Au, Fe and Cu deposits hosted by metamorphic rocks. Based on a systematic studies of the representative metallic deposits, four mineralization concentration camps have been outlined. They include (1) eastern Mazongshan Fe, Cu and Au camp; (2) Yueyashan-Xiaohuangshan Fe, V and Cr camp; (3) Heiyingshan-Jiaochagou Fe and Au camp, and (4) Elegengwulanwula - Wuzhuergashun Fe and Cu camp. Among all these four camps, the first one occurs within the ancient continent, and the other three are located along the active margin of the ancient continent. The relationship between the crust evolution and the metallogney can be summarized as follow: (1) Pre -orogenic stage: rift - faulting resulted in the formation of the banded iron formation (BIF) and quartz vein type gold deposits within the ancient continent; (2) closing stage of the oceanic crust: igneous activities on the sea floor produced the Fe, Cr, and V deposits; (3) collision and orogenic stage: a number of porphyry Mo (Au), Cu as well as skarn Fe -Cu deposits are formed; (4) Post - orogenic stage; W, Sn and rare metal deposits genetically related to the emplacement of crust - derived granitoids. Systematic geological investigations on the mineral resources of the region indicate that the wall rocks of these metal deposits vary from one place to place, but most of them show an intimate relation with the Hercynian tectonism and magmatism. Geological and geochemical features of these deposits have attracted the domestic and international geologists’ attentions. The integrated analyses of he geological setting, geological and geochemical features of these deposits will greatly upgrade the understanding of the ore-forming processes of the deposits. Meanwhile, the genetic model and mineral exploration criteria of these metal deposits can also be used during the comprehensive evaluation of the concealed metal deposits in the Inner Mongolian Beishan and its neighbouring region.更多还原