摘要
通过对四个典型矿床 (二密、西岔—金厂沟、正岔、荒沟山 )的地质、地球化学等综合信息对比 ,发现它们在形成时间—空间—成因上既相互联系 ,又相互区别 ,共同构成斑岩—热液成矿系统。该系统包括“三大”成矿体系 ,即 :幔源岩浆体系、深穿透断裂构造体系、含矿气液流体体系。其中 ,二密铜矿产于中生代塌陷式火山机构内的斑岩体内外接触带 ,为斑岩型矿床 ;西岔—金厂沟金矿产于深穿透性构造控制的斑岩体边部 ,属斑岩—热液脉型金矿 ;正岔铅锌矿产于中生代斑岩体与早元古宙地层的外接触带 ,属热液矽卡岩型多金属矿 ;而荒沟山金矿则受控于北东向鸭绿江断裂体系与中生代斑岩共存的构造带中 ,属热液脉型金矿。在区域成矿上构成斑岩型、斑岩—浅成热液脉型和浅成热液脉型金多金属成矿模式。
Based on the comparative study of geologic and geochemical characters of four typical deposits, i.e. Ermi, Xicha-Jinchanggou, Zhengcha and Huanggoushan, it is found that they are both related to and distinguished from each other in time, space and genesis. The mineralization system has three giant system, namely mantle magmatic system, penetrability deep-fault and ore- bearing pneumato-hydrothermal system. The Ermi copper deposit occurs in the inside or/and outside contact zone of porphyry body on the Mesozoic volcanic-tectonic subsidence structure, and can be named porphyry deposit. The Xicha-Jinchanggou gold deposits, named porphyry- hydrothermal deposit, form in the side zone of porphyry body by deep fault control. Other type of the Zhengcha lead-zinc deposit occurs in the outside contact zone between Mesozoic porphyry body and wall rock of lower Proterozoic epirock or stratum, being of hydrothermal skarn- multiple metallogenic deposits. One other type of the Huanggoushan gold deposits brings the co-inside structure belt with the northeast Yalujiang fault system and Mesozoic porphyry controls. From the porphyry to the porphyry-epithermal, and then the epithermal vein, deposits constitute a multiple metallogenic model in regional in south Jilin province.
出处
《地质与勘探》
CAS
CSCD
北大核心
2002年第2期28-32,共5页
Geology and Exploration
