摘要
辽南地区从太古宙到显生宙先后经历了四次大的构造变动，从老到新可相对划分出鞍山旋回、辽河旋回、印支旋回和燕山旋回四个构造旋回。该区金矿控矿构造主要是中生代前的东西向基底构造与中生代的北东—北北东向断裂构造复合控矿，故其金矿成矿带表现为东西成带、北东成行的构造控矿格局。叠加构造控矿是该地区最主要的构造控矿型式。该区金矿形成与燕山早期同熔型花岗岩密切相关，基本上属于岩浆热液成因类型。矿体或矿化体多赋存在与成矿期构造有关的脆性破裂构造内。矿化类型主要为含金石英脉型和碎裂蚀变岩型。构造控矿型式主要有脆、韧性剪切带叠加控矿、层间破碎带控矿、构造复合控矿和脆－韧性剪切带构造控矿四种型式。
South Liaoing is a major base of gold producing in China,where there are tens of gold deposits of different types and different scales. Based on the relation between the tectonic evolution and gold deposits,the paper analyses the tectonic evolution history, discusses the genetic relation between the tectonic evolution and the ore forming evolution, analyses the features of structural ore controling and builds the model of the structural ore control.
关键词
辽南
金矿
构造演化
构造控矿
South Liaoning, gold deposit, tectonic evolution, structural ore controlling
