CAJ | 학술논문

金山沟金矿床是新疆典型的陆相火山岩型金矿床之一，赋存于一套以粗面安山岩和玄武质粗面安山岩为主的早石炭世火山岩中，对火山岩的构造地质背景的研究是重建地质过程的关键。对矿区火山岩进行岩石地球化学特征和成矿物质来源、成矿温度等方面的研究和总结，进而探讨火山岩形成的构造环境与金矿床的成矿模式。地球化学特征表明，大多数火山岩的化学成分从钙碱性、高钾钙碱性变化到钾玄岩系列，属于富钠钙碱性安山质火山岩类，属于大陆边缘弧环境。同位素207 Pb/204 Pb的值与上地幔一致，S同位素也表明矿区火山岩为幔源岩，结合区域地质资料，认为金山沟金矿区出露的火山岩可能属于造山伸展期大陆边缘火山作用下的产物。包裹体测温数据和C、H同位素表明，金山沟金矿床成因类型为中低温浅成热液型金矿床。在以上研究基础上，结合成矿过程，将该矿床成矿模式总结为“两阶段三期次”的“两层楼式”。
금산구금광상시신강전형적륙상화산암형금광상지일，부존우일투이조면안산암화현무질조면안산암위주적조석탄세화산암중，대화산암적구조지질배경적연구시중건지질과정적관건。대광구화산암진행암석지구화학특정화성광물질래원、성광온도등방면적연구화총결，진이탐토화산암형성적구조배경여금광상적성광모식。지구화학특정표명，대다수화산암적화학성분종개감성、고갑개감성변화도갑현암계렬，속우부납개감성안산질화산암류，속우대륙변연호배경。동위소207 Pb/204 Pb적치여상지만일치，S동위소야표명광구화산암위만원암，결합구역지질자료，인위금산구금광구출로적화산암가능속우조산신전기대륙변연화산작용하적산물。포과체측온수거화C、H동위소표명，금산구금광상성인류형위중저온천성열액형금광상。재이상연구기출상，결합성광과정，장해광상성광모식총결위“량계단삼기차”적“량층루식”。
Jianshangou Gold Deposit is one of the typical continental volcanic type gold deposits,hosted primarily in the late Carboniferous volcanic rocks,which mainly contain a set of trachyandesite and basaltic trachyandesite.The study on tectonic settings of the volcanic rocks is crucial for the reconstruction of the genesis.The paper studies and summarizes geochemistry of the deposit,the sources of metallogenic materials and mineralization temperature and other aspects of the volcanic rocks to discuss the tectonic setting of volcanic rock formation and mineralization pattern.Geo-chemical data indicate that the volcanic rocks range in composition from calc-alkaline,high-K calc-alkaline to shos-honite,which belongs to Na-rich calc-alkaline andesitic volcanic rocks and continental margin arc environment. 207Pb/204Pb isotope values are consistent with the mantle,S isotopes also show that volcanic rocks in the region are mantle source rocks.Combined with regional geological data, this paper considers that volcanic outcrops in Jinshan Gold Mine District may be the result of the extension of the continental margin orogenic volcanism.Inclusion tempera-ture data and C,H isotopes indicate that the genesis is medium-low temperature epithermal type gold deposit.In the a-bove study,based on the combination of the mineralization process,the metallogenic pattern is summed up as "two-stage three times,"the"two-story style.