辽宁白云金矿床成矿构造与成矿结构面特征浅析  

CHARACTERISTICS OF METALLOTECTONICS AND ORE-FORMING STRUCTURAL PLANE IN BAIYUN GOLD DEPOSIT,LIAONING

作　　者：李德东[1] 王玉往[1] 张志超 田野[1] 周国超 解洪晶[1] 石煜[1] LI Dedong;WANG Yuwang;ZHANG Zhichao;TIAN Ye;ZHOU Guochao;XIE Hongjing;SHI Yu(Beijing Institute of Geology for Mineral Resources,Beijing 100012,China)

机构地区：[1]北京矿产地质研究院

出　　处：《地质力学学报》2019年第A01期10-20,共11页Journal of Geomechanics

基　　金：国家重点研发计划项目(2018YFC0603804);中国地质调查局地质调查项目(12120115034001)

摘　　要：白云金矿是辽宁省青城子矿集区大型金矿床之一,文章根据矿山资料及野外详细调查,主要对矿区的成矿构造与成矿结构面进行了梳理。成矿构造主要为成矿期活动的断裂和褶皱,利用侵入其中的含矿岩脉(石英斑岩、花岗斑岩、闪长玢岩和煌斑岩)确定成矿期断裂主要为近东西向、北西向和北东向断裂,成矿期的褶皱主要为姚家岭—天桥岭—李家堡子倒转向斜,该倒转向斜是青城子一带印支期岩浆活动形成的推覆构造形成;成矿结构面主要分为四种,即侵入岩与围岩接触面、层间断裂面或接触面、围岩断裂或裂隙面和水压致裂结构面,并从力学角度分析了这四种结构面的产生机制。最后,讨论了在强烈的由南向北挤压应力作用下,含矿热液沿不同的张性裂隙侵位形成不同矿体样式。The Baiyun gold deposit is one of the largest ore deposits in the Qingchengzi ore concentrated area,Liaoning.Characteristics of metallotectonics and ore-forming structural planes have been studied comprehensively,based on mineral exploration data and field investigation.Active fractures and folds in ore-forming period become the metalotectonic structures.Fractures can be divided into EW-,NW-and NE-ward fractures based on the injected dikes(such as quartz porphyry,granite porphyry,diorite porphyrite and lamprophyre),and fold is the Yaojialing-Tianqiaoling-Lijiapuzi inverted syncline formed by the thrust derived from Indosinian magmatic activities in Qingchengzi area.Ore-forming structural planes can be divided into four types,namely the contact interface between intrusive rock and surrounding rock,interlayer fracture and lithologic contact interface in the stratum,rock fracture or fissure planes and hydraulic fracturing structure planes.Moreover,formation mechanism of these structural planes was discussed.Finally,it is summarized that ore-bearing hydrothermal fluids flowed along different tensile fracture and formed different ore body patterns under the intense pressure from the south to the north.

关 键 词：成矿构造 成矿结构面 白云金矿 辽宁青城子 

分 类 号：P618.51[天文地球—矿床学]