CAJ | 학술논문

辛庄金矿位于山西陆台五台隆起西北侧与燕山沉降带西南缘两大构造单元相互嵌接的中生代构造岩浆活动带上，矿体产状受NNW和NW向断裂控制。根据脉体穿切关系和矿物交代关系，可以将辛庄金矿分为早、中、晚3个成矿阶段。本区流体包裹体主要以气液两相包裹体为主，成矿温度有两个峰值：320~340℃和220~260℃，分别对应石英?黄铁矿阶段和石英?多金属硫化物阶段，属于中高温的范围。包裹体气相成分以H2O和CO2为主，并含有一定量的CH4以及极少量的H2、C2H2和C2H6；液相成分主要有Ca2+、Mg2+、Na+、K+、SO42?、Cl?和F?。本区氢氧同位素组成表明成矿流体具有大气降水与深部岩浆流体混合特点。总体而言，辛庄金矿的初始流体具有中高温、富CO 2、低盐度的流体特征，晚成矿阶段流体演化为低温、低盐度水溶液流体，流体的不混溶导致了主成矿期矿质的大量沉淀。辛庄金矿为与燕山期岩浆活动有关的热液型金矿床。
신장금광위우산서륙태오태륭기서북측여연산침강대서남연량대구조단원상호감접적중생대구조암장활동대상，광체산상수NNW화NW향단렬공제。근거맥체천절관계화광물교대관계，가이장신장금광분위조、중、만3개성광계단。본구류체포과체주요이기액량상포과체위주，성광온도유량개봉치：320~340℃화220~260℃，분별대응석영?황철광계단화석영?다금속류화물계단，속우중고온적범위。포과체기상성분이H2O화CO2위주，병함유일정량적CH4이급겁소량적H2、C2H2화C2H6；액상성분주요유Ca2+、Mg2+、Na+、K+、SO42?、Cl?화F?。본구경양동위소조성표명성광류체구유대기강수여심부암장류체혼합특점。총체이언，신장금광적초시류체구유중고온、부CO 2、저염도적류체특정，만성광계단류체연화위저온、저염도수용액류체，류체적불혼용도치료주성광기광질적대량침정。신장금광위여연산기암장활동유관적열액형금광상。
Xinzhuang gold deposit is located in the Mesozoic tectonic-magma activation area which is embedded by the two tectonic units-the northwestern Wutai uplifts of Shanxi platform and the southwestern Yanshanian subsidence belt. The occurrence of the ore body is controlled by NNW and NW faults. The crosscutting relationships and mineral replacement suggest that the ore forming process includes the earlier, middle and later stages. The fluid inclusions of the ore in this deposit are mainly the gas-liquid inclusions. The ore-forming temperatures have two peak values: 320?340℃ and 220?260℃, corresponding to the quartz-pyrite-chalcopyrite stage and the quartz-polymetallic sulfide stage, respectively, which indicates that the deposit belongs to the hypo-mesothermal gold deposit. The gas compositions in the fluid inclusions mainly include H2O and CO2, with trace CH4 and H2, C2H2 and C2H6. The liquid phase mainly contain Ca2+, Mg2+, Na+, K+, Cl?, SO42?, Cl? and F?. The composition of hydrogen and oxygen means the mixing of meteoric water and deep magmatic fluid. In general, the ore fluids in the early and middle stages are characterized by meso-to hypothermal CO2-rich and low salinity, which are considered as the nature of metamorphic fluids, whereas the late-stage fluids are low temperature, low salinity and CO2-poor. The fluid immiscibility causes gold precipitation in the middle-stage. The Xinzhuang gold deposit belongs to the quartz vein type related to the Yanshanian mediosilicic-acid magma activities.