摘要
都龙锡锌铟多金属矿床位于华南板块西南缘之滇东南老君山矿集区南部,是中国重要的锡锌铟多金属资源产地,构造控矿特征明显。对铜街、曼家寨两个典型矿段及外围构造变形分析及控矿构造解析表明:区内各地质体之间均为构造接触,构造变形主要存在伸展滑脱及左行走滑等构造样式; F_0、F_1、F_2三条南北向断裂组成的早白垩世伸展滑脱构造控制了矿区的矿化蚀变及矿体空间产出形态,是矿区最主要的控矿构造;成矿后北西向马关—都龙左行走滑断裂为破矿构造,但其正断的性质使矿区受剥蚀程度相对较低,对矿床保存有利。根据控矿构造组合特征及区域构造背景建立了构造控矿模式,认为矿区南部深部、西部寒武系地层与新寨岩组深部为进一步寻找锡锌铟矿的有利区域,矿区深部找矿潜力较大。
The Dulong Sn-Zn-In polymetallic deposit is situated in the south of the Laojunshan deposit-accumulated area,southwestern margin of the South China block.It is an important source of Sn-Zn-In polymetallic resources and has obvious structural ore-controlling characteristics.Detailed field study of the Tongjie and Manjiazhai area showed that the contact relationship of strata is all tectonic contact,and the structural styles mainly include extensional slip and left strike slip.The Early Cretaceous extension slip structure is the most important ore-controlling structure in the mining area and consists of three north-south decollement faults:F0,F1 and F2,and the mineralization,alteration and characteristics of the ore-body are mainly controlled by these faults.The Maguan-Dulong faults are NW-trending strike slip faults.These faults are post-mineralization faults and they control the north boundary of the deposit.The property of normal faults make the erosion degree of the mining area relatively low,which plays an advantageous role in the preservation of the deposit.Based on the characteristics of ore-controlling structures and the regional tectonic setting,the ore-controlling model of the Dulong deposit is proposed.It is believed that the deep south of the Dulong area,the west of the Cambrian strata and the deep Xinzhaiyan formation are favorable areas for the further exploration for tin,zinc and indium ores and the deep mining areas have great prospecting potential.
作者
薛伟
张达
李成远
方烨
陈子丹
XUE Wei;ZHANG Da;LI Chengyuan;FANG Ye;CHEN Zidan(State Key Laboratory of Geo-Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China;School of Earth Sciences and Mineral Resources,China University of Geosciences,Beijing 100083,China)
出处
《地质力学学报》
CSCD
2019年第1期77-89,共13页
Journal of Geomechanics
基金
国家重点研发计划(2016YFC0600509)
中央高校基本科研业务费专项资金资助(2652017259)
关键词
都龙锡锌铟矿
控矿构造
构造解析
控矿模式
找矿方向
Dulong Sn-Zn-In deposit
ore-controlling structure
structural analysis
ore-controlling model
prospecting direction
作者简介
薛伟(1990-),男,在读博士,构造地质学专业。E-mail:xueweiwd@163.com;通讯作者:张达(1967-),男,教授,主要从事构造地质学与区域成矿规律研究。E-mail:zhangda@cugb.edu.cn.
