摘要
白云鄂博群和渣尔泰山群是华北板块北缘中新元古代裂陷谷沉积的陆缘碎屑岩、泥页岩、碳酸盐岩及少量火山岩建造,赋存的典型金矿床有白云鄂博北部金矿床、朱拉扎嘎、浩尧尔忽洞等成型金矿床。从区域成矿角度看,由西向东构成了一个巨大的Au-Cu-Pb-Zn-S(Fe)-Mn-Au-REE-Nb-Fe热水沉积成矿系统。地质特征表明金矿床均具有明显的层控型特点;元素地球化学特征显示金的来源主要与中元古代火山活动及沉积地层有关;同位素年龄暗示一期重要成矿时代与华力西晚期的岩浆-构造事件相耦合。认为金矿床成因可概括为热水喷流沉积-热液叠加改造复合型。显示具有较大的找矿潜力。
Bayan obo group and Zhaertaishan group are the main stratum in middle - new Proterozoic era in the north margin of North China platform, which were consisted of metamorphic calcareous sihstone and slate, carbonate rocks and a few volcanic rocks. There are a series of Representative gold deposits such as North Bayan Obo gold deposit, Zhulazhaga gold deposi, Haoyaoerhudong gold deposit in them. On the views of metallogenic tectonic setting, there is giant west - east direction Au - Cu - Pb - Zn - S（Fe） - Mn - Au - REE - Nb - Fe hydrothermal - sedimentary metallogenic system, the geological characteristics indicate that it is apparent features of the layer - control type, the geochemical features imply that metallogenic materials origin is mainly related to middle proterozoic volcanism and sedimentary rocks. The isotopic dates indicate that the Au ore - forming epoch coincide with the events of magma - tectonics in late Variscan, It is considered that genesis of deposits are concluded as the combinative type of sedex - hydrothermal superimposion.
出处
《地质与勘探》
CAS
CSCD
北大核心
2008年第1期9-14,共6页
Geology and Exploration
基金
内蒙古自治区国土资源厅1∶5万矿产地质调查项目(编号:内地勘计审2005矿调-16)资助
关键词
金矿床
成矿征
成因探讨
裂谷系
华北板块北缘西段
gold deposit, metallogenic characteristics, genesis, rift zone, the Northern Margin of North China platform
