Ore prospecting on northwestern margin of Hengyang Basin using geophysical and geochemical information
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摘要: 衡阳盆地是华南扬子板块和华夏板块的拼接带,因其复杂的地质构造运动历史造就了其具有丰富的矿产资源潜力。为深入解剖衡阳盆地西北缘地层构架,探讨矿床就位机制,首先利用跨越紫云山岩体和南岳岩体的多方法长剖面进行综合探测,分析了衡阳盆地西北缘盆地结构;其次选择剖面经过重点区段的精测剖面采用激电测深进行大比例尺精细探测,分析了长寿—衡阳—观音阁断裂的激电响应特征,探讨了其成因与成矿远景;最后结合区域地质、重力异常等综合信息研究了此区内的成矿物质运移规律,证实了衡阳盆地属于典型的“亚幔柱—幔枝体系。
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关键词:
- 衡阳盆地西北缘 /
- 可控源音频大地电磁法 /
- 广域电磁测深 /
- 综合物化探方法 /
- 亚幔柱—幔枝体系
Abstract: The Hengyang Basin is a junction zone between the Yangtze Plate in South China and the Cathaysian Plate. It is expected to have great potential for rich mineral resources given its complex geological tectonic movement history. This paper aims to deeply analyze and explore the stratigraphic framework and deposit occurrence mechanisms on the northwestern margin of the Hengyang Basin. To this end, a series of geophysical surveys in this area were carried out. Firstly, a multi-method survey of a long section spanning the Ziyunshan and Nanyue rock masses was conducted and the structure of the northwestern margin of the Hengyang Basin was accordingly analyzed. Secondary, large-scale fine detections of subsections in the key sections/blocks were carried out using induced polarization (IP) sounding. Meanwhile, the characteristics of the IP response of the Changshou-Hengyang-Guanyin’ge fault were analyzed especially, and the genesis and metallogenic prospect of the fault were explored. Finally, the migration rules of ore-forming materials on the margin were investigated based on comprehensive information such as regional geological and gravity anomalies. The combined results confirmed that the Hengyang Basin is a typical sub-mantle plume-mantle branch system. -
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[1] 湖南省地质调查院. 湖南省区域地质志[M]. 北京: 地质出版社, 2017.
[2] Hunan Geological Survey Institute. Regional geology of Hunan Province[M]. Beijing: Geology Press, 2017.
[3] 湖南省地质调查院. 1;20万衡阳幅区域重力调查技术说明书[R]. 2001.
[4] Hunan Geological Survey Institute. 1;200,000 regional gravity survey technical specification for the Hengyang Plate[R]. 2001.
[5] 王敏, 王雨豪, 赵亚娟, 等. 衡阳盆地与周边重力异常的分析[J]. 国土资源刊, 2015, 12(4):30-34.
[6] Wang M, Wang Y H, Zhao Y J, et al. Analysis of gravity anomalies in the Hengyang Basin and surrounding areas[J]. Land Resources Guide, 2015, 12(4):30-34.
[7] 曾华霖, 程业勋, 管志宁, 等. 重力场与重力勘探[M]. 北京: 地质出版社, 2005.
[8] Zeng H L, Cheng Y X, Guan Z N, et al. Gravity field and gravity exploration [M]. Beijing: Geological Publishing House, 2005.
[9] 何友宇, 姜必广, 周锡平, 等. 衡阳盆地盐田桥矿区地质—物化探综合找矿效果[J]. 物探与化探, 2016, 40(4):681-687.
[10] He Y Y, Jiang B G, Zhou X P, et al. The comprehensive prospecting effect of geology-physical and geochemical exploration in Yantianqiao mining area in Hengyang Basin[J]. Physical and Geochemical Exploration, 2016, 40(4):681-687.
[11] 周厚祥, 杨贵花, 蒋中和, 等. 大义山锡矿田矿床地质特征及矿床成因[J]. 华南地质与矿产, 2005(2):87-94.
[12] Zhou H X, Yang G H, Jiang Z H, et al. Geological characteristics and genesis of the Dayishan tin ore field[J]. Geology and Mineral Resources of South China, 2005(2):87-94.
[13] 冯雨周, 邵拥军, 葛超, 等. 湖南衡阳柏枋铜矿矿床地质特征及成因分析[J]. 南方金属, 2017(2):29-31.
[14] Feng Y Z, Shao Y J, Ge C, et al. Geological characteristics and genetic analysis of Baifang copper deposit in Hengyang, Hunan[J]. Southern Metals, 2017(2):29-31.
[15] 饶家荣, 王纪恒, 曹一中. 湖南深部构造[J]. 湖南地质, 1993(s1):10.
[16] Rao J R, Wang J H, Cao Y Z. Deep structure of Hunan[J]. Hunan Geology, 1993(s1):10.
[17] 李福顺. 钦杭成矿带衡阳盆地找矿方向及前景分析[J]. 华南地质与矿产, 2012, 28(4):360-368.
[18] Li F S. The prospecting direction and prospect analysis of Hengyang Basin in Qinhang metallogenic belt[J]. Geology and Mineral Resources of South China, 2012, 28(4):360-368.
[19] 何继善. 广域电磁法和伪随机信号电法[M]. 北京: 高等教育出版社, 2010.
[20] He J S. Wide-area electromagnetic method and pseudo-random signal electrical method [M]. Beijing: Higher Education Press, 2010.
[21] 何继善, 柳建新. 伪随机多频相位法及其应用简介[J]. 中国有色金属学报, 2002, 12(2):374-376.
[22] He J S, Liu J X. Pseudo-random multi-frequency phase method and its application[J]. The Chinese Journal of Nonferrous Metals, 2002, 12(2):374-376.
[23] 何继善. 可控源音频大地电磁法[M]. 长沙: 中南工业大学出版社, 1990.
[24] He J S. Control source audio magnetotellurics [M]. Changsha: Central South University Press, 1990.
[25] 汤井田, 何继善. 可控源音频大地电磁法及其应用[M]. 长沙: 中南大学出版社, 2005.
[26] Tang J T, He J S. The apply of control source audio magnetotellurics [M]. Changsha: Central South University Press, 2005.
[27] 刘耀文, 蒋永芳, 冯绍平, 等. 广域电磁法在上宫金矿集区的应用研究[J]. 物探与化探, 2020, 44(5):1085-1092.
[28] Liu Y W, Jiang Y F, Feng S P, et al. The application of the wide field electromagnetic method to the Shanggong gold ore concentration area[J]. Geophysical and Geochemical Exploration, 2020, 44(5):1085-1092.
[29] 柳建新, 郭振威, 童孝忠, 等. 地面高精度磁法在新疆哈密地区磁铁矿勘查中的应用[J]. 地质与勘探, 2011, 47(3):432-438.
[30] Liu J X, Guo Z W, Tong X Z, et al. Application of the ground high-precision magnetic method to magnetite survey in the Hami area, Xinjiang[J]. Geology and Exploration, 2011, 47(3):432-438.
[31] 王峰, 吴志春, 陈凯, 等. CSAMT法在深部地质结构探测中的应用——以相山铀矿田邹家山地区为例[J]. 物探与化探, 2016, 40(1):17-20.
[32] Wang F, Wu Z C, Chen K, et al. The application of CSAMT to detecting deep geological structures in the Zoujiashan area of the Xiangshan uranium orefield[J]. Geophysical and Geochemical Exploration, 2016, 40(1):17-20.
[33] 刘俊峰, 程云涛, 邓志强, 等. CSAMT与AMT数据“拼接处理——以湖南仁里铌钽矿床7号剖面为例[J]. 物探与化探, 2021, 45(1):68-75.
[34] Liu J F, Cheng Y T, Deng Z Q, et al. CSAMT and AMT data “splicing processing: A case study of No.7 profile of the Renli niobium tantalum deposit in Hunan Province[J]. Geophysical and Geochemical Exploration, 2021, 45(1):68-75.
[35] 李茂平, 黄富年. 南岭成矿带坪宝矿田地质物化探异常综合研究及找矿预测[J]. 湖南有色金属, 2020, 36(4):5-8.
[36] Li M P, Huang F N. A comprehensive study of geophysical and geochemical anomalies and its prospecting prediction in Pingbao ore field of Nanling metallogenic belt[J]. Hunan Nonferrous Metals, 2020, 36(4):5-8.
[37] 温佩琳, 赵秋梅. 大深度激发极化法初步探讨[J]. 物探与化探, 1996, 20(5):329-330.
[38] Wen P L, Zhao Q M. A preliminary discussion on the great drpth induced polarization method[J]. Geophysical and Geochemical Exploration, 1996, 20(5):329-330.
[39] 赵增霞, 徐兆文, 缪柏虎, 等. 湖南衡阳关帝庙花岗岩岩基形成时代及物质来源探讨[J]. 地质学报, 2015, 89(7):1219-1230.
[40] Zhao Z X, Xu Z W, Miao B H, et al. Diageneticage and material source of the Guandimiao granitic batholith, Hengyang City, Hunan Province[J]. Acta Geologica Sinica, 2015, 89(7):1219-1230.
[41] 秦锦华, 王登红, 陈毓川, 等. 试论湖南衡阳盆地与地幔柱的关系及其对关键矿产深部探测的意义[J]. 地质学报, 2019, 93(6):1501-1513.
[42] Qin J H, Wang D H, Chen Y C, et al. Discussion on the relationship between Hengyang basin and mantle plume and its implication for the deep prospecting of key minerals[J]. Acta Geologica Sinica, 2019, 93(6):1501-1513.
[43] 赵斌, 高红芳, 张衡, 等. 基于深度域地震成像的中沙海槽盆地东北部结构构造研究[J]. 热带海洋学报, 2019, 38(2):95-102.
[44] Zhao B, Gao H F, Zhang H, et al. Structure study of the northeastern Zhongsha Trough Basin in the South China Sea based on prestack depth migration seismic imaging[J]. Journal of Tropical Oceanography, 2019, 38(2):95-102.
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