CAJ | 학술논문

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-热液叠加改造型矿床。
대횡로식고광상위우료길원고주렬곡대중부적로령금、다금속성광대중，시국내근년래발현화사명적신류형고광상。해류광상산우고원고대로령군부붕、탄천매암협석영암（규질암）건조지중；광체유함탄견운천매암、함전기석견운천매암、석영암、전영암조성，정층상、안상산출，산상여위암일치；광석중고정독립광물류고얼광、휘고광、방고광화함고황철광등산출。통과대광상층공특정、광체산상여광석조합、광석침적조구、용광암석지구화학、열수침적암、희토원소급동위소조성등궤방면적연구，증명해광상구유명현적해저열수침적성인특정,광상수후기열액개조첩가강렬。종이제출대횡로식고광상위해저열수침적-열액첩가개조형광상。
Existing in Laoling metallogenic zone of gold and polymetallicdeposits, 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.