吉林老岭大横路式热水沉积叠加改造型钴矿床  

DAHENGLU TYPE OF COBALT DEPOSIT IN LAOLING AREA,JILIN PROVINCEA SEDEX DEPOSIT WITH LATE REFORMATION

作　　者：杨言辰[1] 冯本智[1] 刘鹏鹗[1] 

机构地区：[1]吉林大学地球科学学院,吉林长春130026

出　　处：《长春科技大学学报》2001年第1期40-45,共6页Journal of Changchun University of Science and Technology

基　　金：原地质矿产部定向基金资助项目 !( 96 - 0 7);高等学校博士点基金资助项目! ( 941870 3)

摘　　要：大横路式钴矿床位于辽吉元古宙裂谷带中部的老岭金、多金属成矿带中 ,是国内近年来发现和查明的新类型钴矿床。该类矿床产于古元古代老岭群富硼、碳千枚岩夹石英岩 (硅质岩 )建造之中 ;矿体由含碳绢云千枚岩、含电气石绢云千枚岩、石英岩、电英岩组成 ,呈层状、鞍状产出 ,产状与围岩一致 ;矿石中钴呈独立矿物硫钴镍矿、辉钴矿、方钴矿和含钴黄铁矿等产出。通过对矿床层控特征、矿体产状与矿石组合、矿石沉积组构、容矿岩石地球化学、热水沉积岩、稀土元素及同位素组成等几方面的研究 ,证明该矿床具有明显的海底热水沉积成因特征 ,矿床受后期热液改造叠加强烈。从而提出大横路式钴矿床为海底热水沉积Existing in Laoling metallogenic zone of gold and polymetallic deposits, Dahenglu type cobalt deposit is a newly found new type deposit,which is located in the middle section of Liaoji Proterozoic rifting zone This type deposit is formed in the formation of B-rich and C-rich phyllite with quartzite (siliceous rocks) as intercalated beds,which belongs to early Proterozoic Laoling group;the orebodies are composed of C-bearing sericite phyllite,tourmaline-bearing sericite phyllite,quartzite and tourmalite,and existed in the forms of bed and saddle whose occurances concordant with wall rocks The author find that the cobalt in ore is in the form of indepent minerals,such as siegenite,cobaltite, skutterudite and Co-bearing pyrite etc Studies on the aspects of strata bound characteristics,occurances of orebodies,sedimentary fabrics of ore,geochemistry of ore-bearing rocks,hot water sedimentary rocks,rare earth elements and isotope etc,indicate that this deposit has obvious genetic characteristics of submarine hot water desposition and was intensely refouned by later thermal solutions Based on all the above said the author suggests Dahenglu type cobalt deposit has genesis of submarine hot water deposition,superimposed by late thermal solutions

关 键 词：富硼建造热水沉积 叠加改造 钴矿床 地球化学特征 成矿地质 成因 

分 类 号：P618.62[天文地球—矿床学]