Study on the faults structure and granite body distribution in Pangushan area of Yudu-Ganxian ore district using gravity and magnetic data
WANG Wan-Yin1, WANG Yun-Peng1, LI Jian-Guo2, LIU Jin-Lan1, ZHAO Bin2, ZHOU Xin-Peng2
1. Institute of Gravity and Magnetic Technology, Chang'an University, College of Geology Engineering and Geomatics, Chang'an University, Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Chang'an University, Xi'an 710054, China; 2. Shanxi Institute of Geophysical and Geochemical Survey, Yuncheng 044004, China
Abstract：Pangushan area is an important mining area inYudu-Ganxian ore district in which tungsten and tin formed, and the faults structure and granite body have great influnce in orebody formed in this mining area. The purpose of this study in which the faults structure and granite body distribution of the study area are researched useing gravity and magnetic data is to provide geophysical basis for deep prospecting. We, in this paper, have done the following work: ① the plane position of the faults structure is inferred using the technique of normalizing the total horizontal derivative of vertical derivative of the gravity anomaly; ② the vertical first derivative of gravity anomaly is inversed using Euler deconvolution method, and the average depth of the faults structure is inferred; ③ the plane position of the granite body is inferred using the vertical first derivative of gravity and magnetic anomalies; ④ the intersection position of the granite body is inferred using the forward and inversion techniques of 2.5D gravity and magnetic profile data in human-computer interaction by RGIS software, and the correctness of interpretation results is verified using borehole data; ⑤ the spatial position of the granite body is showed using the model editing module of 3D gravity and magnetic anomalies area data by RGIS software. The results show that Pangushan area has exposed faults, buried faults, exposed low density and weak magnetic granite body, buried low density and strong magnetic granite body. The granite body distribution is controlled by the faults structure, and the orebody distribution is jointly controlled by the faults structure and granite body.
王万银, 王云鹏, 李建国, 刘金兰, 赵斌, 周新鹏. 利用重、磁资料研究于都—赣县矿集区盘古山地区断裂构造及花岗岩体分布[J]. 物探与化探, 2014, 38(4): 825-834.
WANG Wan-Yin, WANG Yun-Peng, LI Jian-Guo, LIU Jin-Lan, ZHAO Bin, ZHOU Xin-Peng. Study on the faults structure and granite body distribution in Pangushan area of Yudu-Ganxian ore district using gravity and magnetic data. Geophysical and Geochemical Exploration, 2014, 38(4): 825-834.
[1] 梅勇文. 江西南部推(滑)覆构造系统研究[J]. 江西地质,1997,11(3):51-59. [2] 全淦. 赣南贵、有色金属矿床成矿地质条件初步分析[J]. 江西地质,1998,12(1):27-35. [3] 蒋金元. 赣中南东部综合物探异常推断构造格架及找银矿模式[J]. 华东铀矿地质,1996(1):20-25. [4] 叶际,邓国政,皮俊明,等. 盘古山钨矿深部矿床赋存特征分析及找矿前景[J]. 中国钨业,2000,15(4):17-19. [5] 王旭东,倪培,张伯声,等. 江西盘古山石英脉型钨矿床流体包裹体研究[J]. 岩石矿物学杂志,2010,29(5):539-550. [6] 吕古贤,韩璐,童启荃,等. 盘古山构造控矿的垂向变化特征[J]. 矿物学报,2011,(增刊):76-77. [7] 曾广胜. 盘古山钨矿容矿裂隙及盲矿预测[J]. 地质与勘探,1980,24(12):13-16. [8] 陈祥. 赣南黄沙脉状钨矿床容矿断裂构造系统成因探讨. 中国地质大学(北京),2007. [9] 魏祥荣. 遥感在南岭带赣南段构造研究中的应用[J]. 华东铀矿地质,2001(1):21-30. [10] 王定生,张声波,郭家松,等. 江西省国有钨矿山资源现状与潜力分析[J].中国钨业,2005,20(4):15-17. [11] 任英忱. 江西盘古山—黄沙黑钨矿石英脉矿床铋硫盐矿物再研究[J].地质找矿论丛,1998,13(4):1-17. [12] 王万银,邱之云,杨永,等. 位场边缘识别方法研究进展[J]. 地球物理学进展,2010,25(1):196-210. [13] Wang W Y, Pan Y, Qiu Z Y. A new edge recognition technology based on the normalized vertical derivative of the total horizontal derivative for potential field data[J]. Applied Geophysics, 2009, 6(3): 226-233. [14] Hood P, McClure D J. Gradient measurements in ground magnetic prospecting[J]. Geophysics, 1965, 30(3): 403-410.
