CAJ | 학술논문

鹿儿坝金矿床是西秦岭地区的一处中型金矿床，赋矿围岩主要为中三叠统光盖山组长英砂岩、粉砂岩及粉砂质板岩等。在对矿床野外地质特征、矿石矿物组成、矿石结构构造、成矿元素组合详细研究的基础上，认为该区金矿体主要受近EW向脆性断裂构造控制，与闪长玢岩脉关系密切；矿石中金属矿物主要为黄铁矿、毒砂、辉锑矿、闪锌矿；石英、黄铁矿、毒砂为主要载金矿物，矿石类型主要有蚀变构造角砾岩型、蚀变闪长玢岩型、脉状及浸染状硫化物型、褐铁矿化碎裂岩型；流体测温、矿物组合及蚀变特征显示本区为中低温热液金矿床；硫、铅同位素研究结果表明，成矿物质具有深源特征。结合区域矿床研究结果，认为鹿儿坝金矿床形成于印支末期，为与闪长岩脉有关的斑岩型－蚀变岩型金矿床，矿床剥蚀深度较浅，目前所见到金矿体可能大部分为闪长玢岩脉（体）上部破碎带中的蚀变岩型金矿床，深部具有较大的成矿和找矿潜力。
록인패금광상시서진령지구적일처중형금광상，부광위암주요위중삼첩통광개산조장영사암、분사암급분사질판암등。재대광상야외지질특정、광석광물조성、광석결구구조、성광원소조합상세연구적기출상，인위해구금광체주요수근EW향취성단렬구조공제，여섬장분암맥관계밀절；광석중금속광물주요위황철광、독사、휘제광、섬자광；석영、황철광、독사위주요재금광물，광석류형주요유식변구조각력암형、식변섬장분암형、맥상급침염상류화물형、갈철광화쇄렬암형；류체측온、광물조합급식변특정현시본구위중저온열액금광상；류、연동위소연구결과표명，성광물질구유심원특정。결합구역광상연구결과，인위록인패금광상형성우인지말기，위여섬장암맥유관적반암형－식변암형금광상，광상박식심도교천，목전소견도금광체가능대부분위섬장분암맥（체）상부파쇄대중적식변암형금광상，심부구유교대적성광화조광잠력。
Lu'erba Gold Deposit in Min County is a middle gold deposit in western Qinling region.The deposit mainly lies in sandstones,siltstones and silty slates of middle triassic felsic Guanggaishan group.This paper based on the detailed study of Lu'erba Gold Deposit's field geological characteristics,ore mineral constituents,ore textures and structures and ore element association,identifies that the gold deposit is mainly controlled by EW brittle faults and has close relations with diorite-porphyrite;The main ore minerals are pyrite,arsenopyrite,stibnite and sphalerite.Pyrite, arsenopyrite and quartz are the main gold-bearing minerals.The types of ore are altered tectonic breccia,altered diori te-porphyrite,veined and disseminated sulfide ores and cataclastic rock of ferritization;Fluid temperature,mineral as-semblages and alteration features indicate that the area is characterized by low-temperature hydrothermal gold deposit;Study of sulfur and lead isotopes indicates that Lu'erba Gold Deposit is a medium-low temperature hydrothermal depos-it.Combined with the findings of the regional metallogenesis,the deposit is thought to be formed in the end period of Indosinian Movement and be a porphyry-altered rock type gold deposit which is related to the diorite-porphyrite,and the deposit's disintegrated thickness is thin.For now the seen gold orebodies mostly may be alteration type gold depos-its in upper broken belt of diorite-porphyrite veins( body) .There are great potentials for mineralization and prospec-ting.