摘要
毕力赫金矿田受晚古生代古亚洲地球动力学体系控制。矿田整体位于早期近东西向和北东向断裂围限形成的古破火山口范围内,控制矿床(体)产出的主要构造单元包括断裂构造、火山机构以及岩浆侵入接触构造系统。断裂构造呈近东西、北东和北西向,其中北东、北西向断裂及其交汇部位控制了火山活动中心、次火山岩及相关矿体的分布,空间上形成"结点"控岩、控矿模式。石英脉型及构造蚀变岩型金矿(化)体多受北西向断裂构造控制;角砾岩型矿体受火山机构以及次火山活动中心控制;斑岩型矿体则主要受次火山活动中心控制,矿体空间分布受含矿斑岩体的接触带、原生裂隙、各种成因的角砾岩及叠加的构造裂隙等联合控制,常集中在岩体接触带构造顶部,产状缓倾斜部位(上盘)或接触带的偏转和转折部位,以及局部岩枝突出部位。利用建立的矿田构造及矿体构造控矿模型,预测找矿靶区,取得找矿突破。
The Bilihe goldfield was controlled by Pal-Asiatic geodynamic system in Late Paleozoic.The goldfield is located in an ancient caldera which is defined by nearly EW and NE striking faults.The faults,caldera and the contacts of intrusions control the occurrence of the ore deposit.The nearly EW,NE and NW striking faults,especially the intersections of the NE and NW triking faults controlled the distribution of volcanism centers,the sub-volcanic rocks and related orebodies.Quartz vein and tectonite type gold mineralization（orebody） are usually controlled by NW striking faults;breccia type orebody is controlled by the caldera and sub-volcanism center;porphyry type orebody is controlled mainly by sub-volcanism center,distributions of orebodies were co-controlled by contact zone of ore-bearing porphyry,pre-existing fractures,breccia and overlapping structural fissures.Usually,the concentrated upper contacted structural zone of orebodies occur in gently inclined part（hanging wall）,deflection and transition parts of contacted zone and local apophyses protrusion parts.By building structural comprehensive ore-controlling model,the authors predicted the mineralization targets and made a breakthrough in ore prospecting.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2011年第4期567-575,共9页
Geotectonica et Metallogenia
基金
国家危机矿山接替资源找矿项目"内蒙古自治区苏尼特右旗金曦金矿接替资源勘查"(项目编号200715011)
"晋东北-内蒙古中部地区火山岩型金多金属矿床成矿规律总结研究"(项目编号20089925)资助
关键词
构造系统
构造控矿模型
控矿规律
毕力赫金矿田
内蒙古苏尼特右旗
structural system
ore-controlling regularities
structural ore-controlling model
Bilihe goldfield
Sunite You City of Inner Mongolia
