摘要
通过对宁夏卫宁北山地区多金属矿床地质特征的认识,综合前人研究成果,深入分析了多金属矿的成矿规律,依据物化探、磁异常等信息,建立了找矿标志.研究发现:卫宁北山地区多金属矿主要产于早石炭世前黑山组、臭牛沟组下段及晚石炭世土坡组第一,第二段中.在以南北向挤压为主作用下,形成了控制该地区构造格局和演化的近东西向展布的断裂和褶皱,以及多金属矿的空间分布.多金属矿主要产于规模较大构造破碎带的次级构造及裂隙中,矿体受构造作用控制明显.该地区多金属矿的形成主要与燕山期侵入的中酸性岩浆关系密切,矿床类型可能为中-低温热液矿床.同时,卫宁北山地区近东西向的次级构造、"硅钙面"附近以及规模较大褶皱的转折端部位是寻找多金属矿的较有利部位,金场子及二人山等矿段,物化探、磁异常明显,在其深部具有很大的找矿潜力.
Based on the understanding of geological characteristics and the information obtained from previous studies and geophysical and geochemical exploration,the metallogenic regularities of polymetallic deposit and the prospecting criteria were analyzed in detail. The polymetallic deposits were mainly produced in Qianheishan,lower segment of the Chouniugou and member 1 and 2 of Tupo formation in Carboniferous. The region tectonic pattern and evolution,as well as the spatial distribution of the polymetallic deposit,were controlled by the near East-West fractures and folds formed by North-South extrusion. The ore bodies were mainly produced in the secondary structures and fractures of the larger structural broken belt,which were controlled by the structures obviously. The formation of polymetallic deposit was closely related to the intrusion of acidic magma in Yanshan period,and the genetic type of deposit was medium-low temperature hydrothermal deposit. The near East-West secondary fractures,hinge zone of the larger folds and the near " silicon calcium surface " were the favorable position for ore formation. The geophysical and geochemical information and magnetic anomalies were obvious in Er’renshan-Jinchangzi,which was a great potential position for prospecting.
作者
海连富
刘金科
李海峰
路学忠
柴德亮
Hai Lianfu;Liu Jinke;Li Haifeng;Lu Xuezhong;Chai Deliang(College of Resources,China University of Geosciences,Wuhan 430074,China;Ningxia Mineral and Geological Survey Institute,Yinchuan 750021,China)
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2020年第1期30-39,共10页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
宁夏回族自治区重点研发计划重大(重点)项目(2018BFG02013)
宁夏地质矿产资源勘查开发创新团队项目(2017-1-4)。
关键词
卫宁北山
多金属矿
成矿规律
找矿方向
Weiningbeishan
polymetallic deposit
mineralization regularity
prospecting direction
