三维地质构造综合调查在辽宁瓦房店金刚石矿深部找矿中的应用  

Application of Comprehensive 3D Geology Survey in the Wafangdian Diamond Mine

作　　者：仲米山 张国仁 王海鹏 卢君实 刘正宏[1] 刘锦[1] 吴子杰 高福亮 高永钊 潘玉啟 万方来[4] 蒋丽丽 杨磊 孙桂涛 ZHONG Mishan;ZHANG Guoren;WANG Haipeng;LU Junshi;LIU Zhenghong;LIU Jin;WU Zijie;GAO Fuliang;GAO Yongzhao;PAN Yuqi;WAN Fanglai;JIANG Lili;YANG Lei;SUN Guitao(College of Earth Sciences,Jilin University,Changchun 130061,Jilin,China;Liaoning Provincial Institute of Geological Exploration Co.,Ltd,Dalian 116100,Liaoning,China;School of Geosciences,China University of Petroleum(East China),Qingdao 266580,Shandong,China;Liaoning Sixth Geological Brigade Co.,Ltd,Dalian 116200,Liaoning,China;Geophysical Measuring Exploration Institute of Liaoning Province Co.,Ltd,Shenyang 110121,Liaoning,China;Liaoning Seventh Geological Brigade Co.,Ltd,Dandong 118003,Liaoning,China)

机构地区：[1]吉林大学地球科学学院,吉林长春130061 [2]辽宁省地质勘查院有限责任公司,辽宁大连116100 [3]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [4]辽宁省第六地质大队有限责任公司,辽宁大连116200 [5]辽宁省物测勘查院有限责任公司,辽宁沈阳110121 [6]辽宁省第七地质大队有限责任公司,辽宁丹东118003

出　　处：《大地构造与成矿学》2023年第3期535-545,共11页Geotectonica et Metallogenia

基　　金：辽宁省2019年省级地质勘查项目“瓦房店金刚石整装勘查区增储示范工程”(LNZC2019-0078-11-1、LNZC2019-0078-1(1)、LNZC2019-0078-20);2020年省级地质勘查项目(JH20-210000-05760)联合资助。

摘　　要：辽宁省瓦房店地区金刚石成矿带是我国非常重要的金伯利岩型原生金刚石矿产区,该区已发现100多个金伯利岩体,探明的金刚石矿资源储量占全国的一半以上。区内影响金伯利岩体形态的主要因素是断裂构造,岩浆侵位时断裂构造控制了岩体形态,成矿后断裂构造对岩体形态进行了改造。逆冲推覆构造是影响区内金伯利岩体形态的最主要断裂构造。本文运用三维地质构造综合调查方法,以三维地质构造填图为基础,以研究区重点构造(逆冲推覆构造)为框架,以物探资料、钻孔资料为深部约束条件,以50号金伯利岩管为重点研究对象,基于3D Mine矿业工程软件平台,利用数字化地学信息建立工作区三维地质模型的工作过程和取得的成果。通过此次工作,证实了区内存在逆冲推覆构造,解释了部分金伯利岩体向下延深不大或突然消失的原因,提出了50号金伯利岩管SEE方向推覆构造面下盘可作为重点勘查区的认识,为瓦房店地区下一步金刚石找矿工作部署提供了依据。As an important ore district of primary kimberlite-type diamond,the Wafangdian diamond metallogenic belt preserves over 100 kimberlite intrusions,which contains more than half of the proven diamond resources/reserves in China.The main factor affecting the morphology of the kimberley pluton is fault.The fault formed before the kimberlite magma ascending could control the morphology,whereas the fault formed after the magma ascending modified the morphology.The thrust nappe structure in the study area is the most important type of fault that significantly influenced the morphology of the Kimberley plutons.Take the No.50 kimberlite pipe as a case,the comprehensive 3D geological survey was applied to prospect the deep diamond ores.The detailed methods include 3D geological mapping,structural analysis of the thrust nappe,and interpretation of geophysical and borehole data.Based on the 3D-Mine mining engineering software platform,the 3D geological model of the No.50 kimberlite pipe and adjacent area was established.Our results also show that the thrust nappe may be the main cause of the shallow downward extension or sudden disappearance of some kimberlite bodies.In addition,the SSE area of the No.50 kimberlite pipe located in the footwall of the thrust nappe structure should be the key area for the future exploration.To sum up,this paper provides critical basis for the future diamond ore exploration in the Wafangdian area.

关 键 词：三维地质调查 金刚石成矿带 逆冲推覆构造 三维地质模型 瓦房店地区 

分 类 号：P628[天文地球—地质矿产勘探]