内蒙古扎木敖包晶质石墨矿床地质特征及成因探讨  

Geological characteristics and genesis discussion of Zhamuaobao crystalline graphite deposit in Inner Mongolia

作　　者：张冲 ZHANG Chong(The Fourth Geological Brigade of North China Geological Survey Bureau,Qinhuangdao 066000,Hebei,China)

机构地区：[1]华北地质勘查局第四地质大队,河北秦皇岛066000

出　　处：《矿产与地质》2020年第5期905-910,共6页Mineral Resources and Geology

摘　　要：为了查明扎木敖包晶质石墨矿床地质特征及成因,对扎木敖包石墨矿床区域地质背景、矿区地质特征、矿体特征等方面进行了分析。结合区域地质背景、矿区地质特征、矿体特征三方面的研究,对矿床成因进行了探讨。研究认为扎木敖包晶质石墨矿床赋存于中太古界乌拉山岩群中上岩群含石墨片岩夹大理岩中。矿区共圈定29条晶质石墨矿体,矿床规模已达超大型,矿体均为隐伏矿体,多与地层产状一致,呈囊状、透镜体状、似层状、扁豆状等形态产出,局部地段出现分枝复合、膨胀、收缩、舒缓波状弯曲的变化。矿体与围岩界限较清晰。结果表明,该晶质石墨矿体受变质表壳岩控制,矿床成因类型为沉积变质型矿床。In order to find out the geological characteristics and genesis of zhamuaobao crystalline graphite deposit,this paper analyzes the regional geology background,geological characteristics of mining area and ore body characteristics of zhamuaobao graphite deposit.The deposit genesis is also discussed in this paper.It is considered that Zhamuaobao crystalline graphite deposit is hosted in the graphite-bearing schist intercalated with marble of the middle and upper rock formations of the middle Archean Wulashan Group.A total of 29 crystalline graphite orebodies have been delineated in the mining area.The deposit scale has reached a super large scale.The orebodies are all concealed under the surface,which are mostly consistent with the trending direction of the strata.They occur in the cystic,lenticular,lamellar,and lentil-like shapes,etc.Locally,there are changes of branching and compounding,expansion,contraction and slow wave bending for the orebodies.The boundary between the orebody and surrounding rock is relatively clear.The result shows that the crystalline graphite orebody is controlled by the metamorphic supracrustal rocks,and the deposit genesis belongs to the sedimentary metamorphic type.

关 键 词：晶质石墨矿 地质特征 矿床成因 内蒙古 

分 类 号：P619.252[天文地球—矿床学]