东川落雪式铜矿的含铜“礁一硅岩组合”与海底喷流热液成矿  

COPPER-BEARING“REEF-SILICILIH ASSOCIATION”AND SEA-FLOOR SPOUTING HYDROTHERMAL MINERALIZATION OF THE DONGCHUAN LUOXUE TYPE OF COPPER DEPOSIT

作　　者：吴健民[1] 黄永平[1] 

机构地区：[1]中国有色金属工业总公司矿产地质研究院

出　　处：《矿产与地质》1995年第3期168-173,共6页Mineral Resources and Geology

摘　　要：从区域地质背景、岩石学、岩石化学、微量元素、氧同位素及稀土元素组成等方面论证东川铜矿含铜“礁—硅岩组合”中的含铜硅质条带—硅质白云岩为海底喷流热水沉积成因；提出了该类层状铜矿的深源含铜富硅混合热液海底喷流—生物富集的沉积成岩成矿模式。并提出东川落雪式层状“马尾丝”铜矿含矿岩系为“含铜礁—硅岩组合”的新观点。It is demonstrated that the Cu-bearing siliceous banding-siliceous dolomite in the Cu-bearing “reef-silicilith association”in the Dongchuan copper deposit was origined from sea-floor spouting hydrothermal sedimentation, based upon the study of regional geological background,petrology,petrochemistry,trace element,Oxygen isotope and REE etc..A metallogenic model of sedimentary diagenesis was built for this stratiform copper deposit to be formed in Cu-bearing,silica-enriching mixed hydrothermal solution from sea-floor spout-ing-organic enrichment.And a new viewpoint is suggested that the ore-bearing rock series in the Luoxie type of stratiform “horse tail”copper deposit in the Dongchuan was Cu-bearing reef silicilith association.

关 键 词：铜矿床 含铜礁 硅岩组合 热液成矿 海底喷流 

分 类 号：P618.410.5[天文地球—矿床学]