摘要
通过对陕南钢厂铜矿的地球化学研究，笔者认为钢厂矿区对应的大地构造环境应为岛弧及其活动大陆边缘，细碧岩的原岩为钙碱性大陆系列，随着海西早期闪长岩的侵入，带来了汽液、热动力和部分成矿物质，形成富含CI、Na+和K+岩浆热液与天水的混合效液，在这种混合热液的作用下，使地层——晚元古代郭家沟组细碧岩和海西早期间长岩中Cu等成矿物质活化，并以CI等络合物形式搬运，在闪长岩体内外接触带的构造片理化带中富集成矿，本矿床属于与闪长岩（次火山岩）有关的中低温铜矿床，并建议该矿的找矿标志为：（1）绢云母化；（2）包裹体特征；（3）F和CI含量；（4）黄铁矿的热电系数。
Tongchang deposit is a very important copper deposit type in south of Shanxi province. Bystudying the geochemical feature of the deposit, we discuss the source of hydrothermal ore-form-ing solution and mineralization mass, and conclude the metallogenic model. The prototype ofspilite, which is the main outcropping stratum (Pt29 9O3~908Ma) in mine area, belongs to cale-alkaline volcanic suite. After Upper Proterozoic, the instrusive of Hercynian diorite brought gas-liquid, thermdynamic and some mineralization mass, formed the mixing hydrothermal solutionrich in CI, Na+ and K+ which mixed by magmatic hydrothermal solutinn and rain water. Themetallogenic elements in spilite and diorite were activated were by the mixing hydrothermal solu-tion and transported by Cl-complex and enriched mineralization in the endocontact and exocontactof diorite. The deposit belongs to low-to-mederate temPerature type which can be correlated withsubvolcanic rock.
出处
《地质找矿论丛》
CAS
CSCD
1997年第4期17-22,共6页
Contributions to Geology and Mineral Resources Research
关键词
地球化学
成矿模式
稳定同位素
成矿热液
铜矿床
Tongchang copper deposit forhemisical feature hydrothermal solution isotopic element
