摘要
云南大红山基底地层中的层状铜矿的硫同位素、微量元素表明其成因与基性岩有关，包裹体测试显示其沉积成矿时海水的温度和盐度相当高．与此对应，层状铜矿的主要含矿地层的化学成分、微量元素和稀土元素特征也都介于正常沉积变质岩和本区的喷流热水沉积变质岩之间．而本区的变质基性熔岩及次火山岩也有被循环海底热液交代过的证据．因此认为层状铜矿及其含矿地层主要是海底循环热液从下部地层交代带出的物质（其中Ｃｕ，Ｆｅ和部分Ｎａ，Ｓｉ，Ｃａ可能来自基性熔岩及次火山岩）和陆源物质在适当的物理化学条件下一同沉积形成的．
Compositions of statabound Cu deposits sulfer isotope and trace elements show that its origin is concerned with basic rocks,and enclousers measured value shows that when the deposit settled,the sea waters temperature and salinity were very high.Corresponding to these,major Ore bearing statums chemical,trace elements and REE compositions are something between ordinary matamophic sediments and matamophic sedimentation exhalation rocks in Dahongshan area.Evidence also indicats that the matamorphic basis rocks had been metasomat by submarine hydrothemal solution.Because of these,It is regarded that material metasomated by the submarine hydrothemal solution from the lower formations(Cu,Fe and parts of the Na,Si,Ca were from mainly the basic rocks),and terrigenous material settled at the same time in proper physical chemistry condition and mixed,which formed the original Cu deposit and its ore bearing stratum.
出处
《昆明理工大学学报（理工版）》
1999年第1期137-144,共8页
Journal of Kunming University of Science and Technology(Natural Science Edition)
关键词
铜矿
含矿地层
成因
云南
基底地层
层状铜矿
Cu deposit
Ore bearing stratum
origin
submarine hydrothemal solution,Dahongshan area
Yunnan
