摘要
BIF型铁矿是发育于华北克拉通内的主要铁矿类型之一,在鲁西南多地也发育该类型铁矿.通过收集以往地质、物探、矿产等成果资料,本次研究工作优选了成武—曹县航磁异常区开展1∶2.5万高精度磁法测量,同时在磁异常重点地段辅以大比例尺重磁精测剖面来进行异常综合解译;上述测量成果查明了研究区磁异常特征和异常较高部位分布范围,即该区磁场表现为"南东、北西低;中部、西部高"的特点,同时该重、磁异常具有同源的特征,与区域上已勘查发现的单县铁矿床物探异常形态相类似.物探数据解译推断了研究区内的构造格架(NW向和NE向2条基岩断裂,分别为曹县断裂和王集断裂),圈定了泰山岩群山草峪组及古近纪地层的分布范围,前者分布于研究区北部地区,后者分布于研究区南侧和西侧地区.本次物探解译工作共圈出了4处磁异常(分别为冉堌镇磁异常、普连集磁异常、九女集磁异常、安仁集磁异常);通过对以上磁异常的对比分析和综合研究,本次研究工作共在该4处磁异常中进一步圈定了4处找矿靶区(分别为冉堌镇找矿靶区、普连集找矿靶区、九女集找矿靶区、安仁集找矿靶区).综合分析上述找矿靶区的勘查前景认为以上找矿靶区具有一定的勘查价值,其中安仁集找矿靶区的铁矿勘查前景较好.
BIF（ Banded Iron Formation） is one of the main types of iron ore deposits that distributed in the North China Craton,and in many places of the southwest region in Shandong province. By systematically collecting the previous achievements（ including geological,geophysical,mineral deposits,etc）,this study selected the southwest aeromagnetic anomaly area of Chengwu county and Caoxian county to carry out the 1： 25000 high-precision magnetic measurement,moreover,supplemented with the large scale highprecision gravity and magnetic survey profile measurement in important sector of the magnetic abnormal areas to interpret the anomalies. Geophysical survey results showed that the characteristics of the magnetic anomaly and distribution range of the higher magnetic anomaly in the region,and the magnetic field is shown as＂lower in the Southeast and Northwest; higher in the central and western＂characteristics. Besides,it has been indicated that the study area has the characteristics of gravity and magnetic anomaly caused by the same source,and the characteristics is similar to the geophysical abnormal shape of the BIF iron deposit which has been prospected in the Shanxian County. By means of the analysis and interpretation of the correlative data, the distribution range of Shancaoyu formation of the Taishan group and Paleogene strata has been identified,the former is located in the northern part of the study area and the latter is located in the southern side and western side of the study area. The tectonic framework has been inferred in the region（ 2 NW and NE trending basement faults are Caoxian fracture and Wangji fracture）. 4 magnetic anomalies have been delineated,which are Rangu magnetic anomaly,Pulianji magnetic anomaly,Jiunvji magnetic anomaly and Anrenji magnetic anomaly.With the contrastive analysis and comprehensive study of the magnetic anomalies,in this study,4 prospecting target areas are delineated in the further of the above 4 magnetic anomalies（ respectively Rangu prospecting target area,P
作者
郝兴中
杨毅恒
李英平
王巧云
HAO Xing-zhong;YANG Yi-heng;LI Ying-ping;WANG Qiao-yun(Shandong Institute of Geological Survey, Jinan 250013, China;School of Earth Sciences and Resources, China University of Geoscienees（ Beijing） , Beijing 100083, China;School of Applied Sciences, Beijing Information Science and Technology University, Belling 100192, China)
出处
《地球物理学进展》
CSCD
北大核心
2018年第2期613-619,共7页
Progress in Geophysics
基金
地质矿产调查评价专项“山东单县地区铁矿调查评价(1212011085305)
山东单县-曹县地区矿产地质调查(12120114030701)
山东省齐河-禹城矿集区找矿预测(DD2016005223)”联合资助
关键词
成武
曹县
BIF
铁矿
磁异常
找矿靶区
Chengwu county
Caoxian county
BIF
iron ore
magnetic anomaly
prospecting target
