Distribution characteristics of structural units in Xincai iron ore area based on gravity and magnetic field characteristics
ZHANG Lei1,2,3(), WANG Wan-Yin2,3, ZHAO Xiu-Jun1, ZHANG Yi-Mi2,3
1. Aero Geophysical and Remote Sensing Center of Henan Province,Zhengzhou 450053,China 2. Institute of Gravity and Magnetic Technology,Chang'an University,Xi'an 710054,China 3. College of Geological Engineering and Geomatics,Chang'an University,Xi'an 710054,China
The Xincai iron ore district is located in the southeast of Wuyang Xincai iron ore metallogenic belt in Henan Province. It is covered with thick Cenozoic strata. The magnetite orebody mainly occurs in the Archean Taihua Group. Due to the underutilization of large-scale geophysical data and other reasons, the division of structural units in the area remains in the result of small-scale division, which restricts the deep exploration breakthrough in this area. In this paper, through the processing and interpretation of large-scale gravity and magnetic data, the spatial distribution characteristics of fault structures and strata in the area were studied. The study shows that there are six main faults in the Xincai iron ore district, which strike NW and NE, and control the basement structural framework; the basement depression area is V-shaped, and the center and both sides of V-shaped are the basement uplift areas. Among the structures, Chendian uplift and Liancun fanghudian uplift were caused by Archean Taihua rock group. The study of magnetic anomalies in this area will help to realize the deep iron ore prospecting breakthrough and hence is of great significance.
张磊, 王万银, 赵修军, 张义蜜. 基于重磁场特征的新蔡铁矿区构造单元分布特征[J]. 物探与化探, 2020, 44(4): 975-984.
ZHANG Lei, WANG Wan-Yin, ZHAO Xiu-Jun, ZHANG Yi-Mi. Distribution characteristics of structural units in Xincai iron ore area based on gravity and magnetic field characteristics. Geophysical and Geochemical Exploration, 2020, 44(4): 975-984.
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