CAJ | 학술논문

马拉乌铅锌矿床为印度尼西亚西加里曼丹（Kalimantan）省吉打邦县近年来发现的铅锌银矿床。该矿矿体顶板为黄铁矿化含碳质泥砂岩,矿体底板为玉髓状硅质岩。矿体呈侧羽状、脉状及透镜状。矿区通常发育的蚀变有硅化、泥化和绿泥石化等。主要矿物组合有方铅矿、闪锌矿、黄铁矿、磁黄铁矿、黄铜矿、斑铜矿、辉锑矿以及自然金、银金矿、辉银矿等,通过对矿石组构等综合分析,表明该矿床的成因是岩浆期后热液充填交代矿床。
마랍오연자광상위인도니서아서가리만단（Kalimantan）성길타방현근년래발현적연자은광상。해광광체정판위황철광화함탄질니사암,광체저판위옥수상규질암。광체정측우상、맥상급투경상。광구통상발육적식변유규화、니화화록니석화등。주요광물조합유방연광、섬자광、황철광、자황철광、황동광、반동광、휘제광이급자연금、은금광、휘은광등,통과대광석조구등종합분석,표명해광상적성인시암장기후열액충전교대광상。
The Marau deposit is a newly discovered lead-zinc ore deposit in Ketapang of Kalimantan Province in Indonesia.The deposit is distinctly controlled by fissures in the Mesozoic-Cenozoic volcanics.The hanging wall of the deposit is formed of pyritized carbargilites,and the bottom wall of chalcedonized silicalites.The ore bodies show pinnate,vein and lenticular shapes.The main wall rock alterations of the deposit are silication,argillization and chloritization.The mineral assemblages are complex and are composed of galena,sphalerite,pyrite,pyrrhotite,chalcopyrite,bornite,stibnite,gold,electrum and argentite.Basing on the analyses of mineral assemblages and chemical compositions of ores,it is clarified that the ore bodies obviously show a zonation in both horizontal and vertical directions,indicating that the formation of the deposit is related to the hydrothermal alteration,caused by intrusion（injection） of subvolcanic rocks,and the hydrothermal solution is derived from late calc-alkaline volcanic rock formations.