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夏家店金矿床和拉尔玛金矿床均产于南秦岭地块古生代裂陷海槽沉积区,矿床赋存于上震旦统—下寒武统碳泥硅质沉积岩系中,矿床表现出微细粒浸染状特征。研究认为,两者在成矿地质背景、矿床地质地球化学、控矿构造、成矿时代、矿床成因、矿床类型等方面具有相似性和相应差别:两矿床分别产于东、西秦岭,各居一方;由氢氧同位素特征可知,夏家店金矿床成矿流体显示大气降水特征而拉尔玛金矿床成矿流体表现混合水特征;两矿床铅同位素均投点于造山带与上地壳演化线之间,表明成矿动力来自大陆造山作用;两矿床稀土元素配分模式均为轻微右倾,显示成矿物质对容矿围岩组分的继承;两矿床均为产于寒武系的类卡林型金矿床。
Both Xiajiadian gold deposit and Lalma gold deposit are produced in the Paleozoic rift trough depositional area of the South Qinling massif. The deposits occur in the Upper Sinian-Lower Cambrian carbonaceous siliceous sedimentary rock series, and the deposit shows Fine-grained disseminated features. The study shows that both of them have similarities and corresponding differences in the aspects of metallogenic geological background, geology and geochemistry of ore deposit, ore-controlling structure, metallogenic era, genesis of ore deposit, type of deposit, etc. The two deposits are respectively produced in the east and west Qinling, On the one hand, it can be seen from the characteristics of hydrogen and oxygen isotopes that the ore-forming fluid of Xiajiadian gold deposit shows the characteristics of atmospheric precipitation and the ore-forming fluid of Lalma gold deposit shows the features of mixed water. The lead isotopes of both deposits cast in either the orogenic belt and the upper crust evolution line , Indicating that the ore-forming motive force comes from the orogeny in the mainland; the REE patterns of both deposits are slightly rightward dip, indicating the succession of metallogenic materials to the ore-bearing wall rock components; both deposits are carlin Type gold deposit.