CAJ | 학술논문

陕西省铧厂沟金矿床位于勉略缝合带以南，矿体受控于近东西向逆冲断层和韧脆性剪切带。本文以细碧岩矿带为例，系统研究了围岩蚀变分带及蚀变矿物组合，总结了矿床的蚀变分带模式。围岩蚀变以穿切细碧岩透镜体的剪切带为中心向外依次可划分为黄铁绢英岩化带、绢云碳酸盐化带和绿泥赤铁矿化带。蚀变矿物组合分别为黄铁矿+铁白云石+铬云母+绢云母+钠长石+石英+方解石、铁白云石+绢云母+钠长石+石英±黄铁矿、(铁)绿泥石+钠长石+铁白云石+赤铁矿+钛铁氧化物+石英±绿帘石。蚀变岩石组分迁移分析表明，在围岩蚀变过程中， SiO2、Na2O、Fe2O3T、MgO与Y等组分发生不同程度的迁出， K2O、CaO、Ba、Rb、Sr、Cr、Cu、Pb和挥发组分等迁入，并以黄铁绢英岩化带最为显著。金在成矿流体中以Au(HS)–2络合物迁移，成矿流体与富铁细碧岩之间的反应是金沉淀重要机制。
합서성화엄구금광상위우면략봉합대이남，광체수공우근동서향역충단층화인취성전절대。본문이세벽암광대위례，계통연구료위암식변분대급식변광물조합，총결료광상적식변분대모식。위암식변이천절세벽암투경체적전절대위중심향외의차가화분위황철견영암화대、견운탄산염화대화록니적철광화대。식변광물조합분별위황철광+철백운석+락운모+견운모+납장석+석영+방해석、철백운석+견운모+납장석+석영±황철광、(철)록니석+납장석+철백운석+적철광+태철양화물+석영±록렴석。식변암석조분천이분석표명，재위암식변과정중， SiO2、Na2O、Fe2O3T、MgO여Y등조분발생불동정도적천출， K2O、CaO、Ba、Rb、Sr、Cr、Cu、Pb화휘발조분등천입，병이황철견영암화대최위현저。금재성광류체중이Au(HS)–2락합물천이，성광류체여부철세벽암지간적반응시금침정중요궤제。
The Huachanggou gold deposit in Shaanxi province is located to the south of Mianlue suture zone. The ore bodies are mainly controlled by EW trending reverse faults and ductile-brittle shear zones. Based on detailed study of alteration mineral association in the main ore zone that hosted in the spilite tectonic lens, an alteration zoning model has been established. The wall rock alteration can be divided into three alteration zones outward from the shear center: pyrite - phyllic alteration zone, sericite - carbonate alteration zone, chlorite - hematite alteration zone. The alteration mineral associations are pyrite + ankerite + fuchsite + sericite + albite + quartz +calcite, ankerite+sericite+albite+quartz ± pyrite, and chlorite+albite+ankerite+hematite+ilmenite oxide+quartz ± epidote, respectively. The elements migration analysis showed that SiO2, Na2O, Fe2O3T, MgO and Y occur to move out in varying degrees, while K2O, CaO, Ba, Rb, Sr, Cr, Cu, Pb and volatile components move in during alteration. The most intensive migration occurred in the pyrite phyllic alteration zone. Gold is mainly transported as Au(HS)–2 complex in the hydrothermal fluids. It seems that fluid-rock interaction between ore-forming fluid and Fe-rich spilite plays an important role in gold precipitation.