摘要
青海循化地区位于祁连造山带与西秦岭造山带接合部,为揭示区内的构造形态,确定重点成矿远景区,开展了1∶5万高精度磁法测量,测线方位北东向30°,采集岩(矿)石磁性标本391块。通过磁性参数分析、磁异常特征分析和解释可知,区内宗务隆—天水断裂逆冲断裂F1的空间走向为NW50°,重点成矿远景区主要分布于测区东北部,由加里东期的积石山超基性闪长岩和雷积山基性花岗岩侵入岩体引起,矿物含量高。研究表明,高精度磁法测量是区域地质调查及矿产普查中重要的基本手段之一,为调查区下一步的矿产调查提供了地球物理依据。
Xunhua region of Qinghai is located in the joints of the Qilian orogenic belt and the west Qinling orogenic belt. In order to reveal the structural feature,and determine the key metallogenic prospect areas,the 150 000 high precision magnetic survey was carried out in the selected area. The azimuth of survey lines is north east to 30°,391 pieces rock（mineral） magnetic specimens were cellected. through the analysis of the magnetic parameters,characteristics analysis and interpretation of magnetic anomaly,the Zong Wu Longtianshui thrust fault F1 towards NW50°. The key metallogenic prospect areas are mainly distributed in the northeast of the surveyed area,by caledonian period intrusive mass of Ji Shi Shan ultrabasic diorite and Lei Ji Shan basite granite,and have high mineral content. This work shows that the high-precision magnetic survey is one of the important basic methods in regional geological survey and mineral survey,provides geophysical basis for the next step of mineral survey in the investigated area.
作者
王美丁
马见青
WANG Mei-Ding;MA Jian-Qing(Geophysical and Geochemical Exploration Corporation, Bureau of Geological Exploration for Nonferrous Metals in Northwest China, Xi＇an 710068,China;School of Geological Engineering and Surveying, Chang＇an University, Xi＇an 710054,China)
出处
《物探与化探》
CAS
CSCD
北大核心
2018年第3期491-498,共8页
Geophysical and Geochemical Exploration
基金
中国地质调查局地质调查项目(12120114018219)
长安大学中央高校基本科研业务费专项资金(310826161008)
关键词
青海循化地区
高精度磁测
磁异常
磁性参数
成矿远景区
Xunhua region of Qinghai
high precision magnetic survey
magnetic anomaly
magnetic parameters
metallogenic pros-pect areas
