CAJ | 학술논문

鸭子沟矿床是青海祁漫塔格地区新近发现的铜、钼、铅、锌多金属矿床。笔者基于详细野外地质调查，开展了地质地球化学研究，分析了找矿前景。该矿床产出2种矿化类型：一种为矽卡岩型铜铅锌矿，矿体主要产于印支期二长花岗岩与滩间山群大理岩接触部位的矽卡岩带中；另一种为产于印支期花岗斑岩中的斑岩型铜钼矿。通过对侵入岩岩石地球化学分析，并结合区域地质构造演化分析，表明与矽卡岩型矿化密切相关的花岗闪长岩和二长花岗岩，以及与斑岩型成矿密切相关的钾长花岗斑岩均属弱过铝质的高钾钙碱性花岗岩类，形成于碰撞后构造环境。基于矿区成矿地质条件和地球物理、地球化学特征综合分析，认为该区具有良好的找矿前景。
압자구광상시청해기만탑격지구신근발현적동、목、연、자다금속광상。필자기우상세야외지질조사，개전료지질지구화학연구，분석료조광전경。해광상산출2충광화류형：일충위석잡암형동연자광，광체주요산우인지기이장화강암여탄간산군대리암접촉부위적석잡암대중；령일충위산우인지기화강반암중적반암형동목광。통과대침입암암석지구화학분석，병결합구역지질구조연화분석，표명여석잡암형광화밀절상관적화강섬장암화이장화강암，이급여반암형성광밀절상관적갑장화강반암균속약과려질적고갑개감성화강암류，형성우팽당후구조배경。기우광구성광지질조건화지구물리、지구화학특정종합분석，인위해구구유량호적조광전경。
Yazigou polymetallic deposit in Qimantage of Qinghai is a newly discovered copper-molybdenum lead-zinc deposit.Based on detailed field survey,this paper studied geological and geochemical characteristics of Yazigou deposit and analyzed its prospecting potential. Two mineralization types have been found,i.e.,skarn copper-lead-zinc ore bodies mainly occurred in skarn between the Triassic monzogranite and the marbles of Tanjianshan group,and copper-molybdenum porphyry ore bodies mainly occurred in the Triassic granitic porphyry.Geochemical results and regional tectonic evolution analysis showed that granodiorite and monzogranite closely associated with skarn mineralization and granitic porphyry strongly related to porphyry mineralization are all weakly peraluminous high K calc-alkaline granites that formed in the post-collision tectonic setting. According to metallogenic geological conditions, geophysical and geochemical characteristics of the Yazigou deposit, this area still has favorable exploration prospects.