Application of audio magnetotelluric method in prospecting for deep hidden manganese ore: A case study in the Pujue manganese mine in Songtao, Guizhou, China
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摘要:
普觉锰矿是黔东地区典型的南华纪"大塘坡式"沉积型锰矿床。区内一系列后期构造对早期形成的沉积型锰矿的埋藏和保存具有重要影响，深部构造格架及其与含锰岩系之间关系的勘查分析对区内找矿预测和深部锰矿勘查十分关键。为了查明普觉锰矿区成矿地质体和断裂构造的空间分布及其相互关系，采用音频大地电磁法（简称AMT）对区内地下电性结构特征和构造格架进行研究。在物性分析的基础上，构建了与测区地电结构大致相似的构造理论模型，通过开展不同模式的理论模型反演计算，优选出了适宜于研究区的Occam-TE一维反演为初始模型的非线性共轭梯度TM模式二维反演方法。运用上述反演方法对区内实测数据进行反演，识别了区内构造格架和含锰岩系的空间展布特征及二者的接触关系，查明了断层F0在深部未对含锰岩系造成破坏。应用研究结果表明，AMT对指导普觉锰矿区及毗邻地区开展深部找矿预测意义重大。
Abstract:The Pujue manganese deposit is a typical Datangpo-type sedimentary deposit of Nanhua period in eastern Guizhou. In the Pujue mining area the early-formed sedimentary manganese deposits were significantly influenced by the subsequent structures in aspects of burial and preservation. Analyzing the deep tectonic framework and its relationship with the manganese-bearing rock series is of great importance to the ore-prospecting prediction and deep exploration of the manganese deposits in the area as well. Our aim is to find out the spatial distribution of metallogenic geological bodies and fault structures and their relationship in the Pujue Manganese mining area. We used audio magnetotelluric method to study the characteristics of underground electrical structure and tectonic framework in the area, and built a theoretical model similar to the geoelectric structure of the study area based on the physical property analysis. Through inversion calculation under different schemas, we gave preference to a two-dimensional inversion method of nonlinear conjugate gradient TM model, which is suitable for Occam-TE one-dimensional inversion as the initial model. We used the above inversion method to invert the measured data from the area, and thus identified the spatial distribution characteristics between the tectonic framework and the manganese-bearing rock series and their contact relationship. It demonstrates that the fault F0 hasn't damaged the manganese-bearing rock series in the deep. Our research results show that AMT is of great significance in guiding the deep prospecting prediction in the Pujue manganese mining area and its adjacent areas.
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Key words:
- Pujue manganese deposit /
- audio magnetotelluric method /
- inversion /
- tectonic framework
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图 1 黔东及毗邻区南华纪早期武陵次级裂谷盆地结构与构造古地理图(周琦等, 2016b)
Figure 1.
图 2 黔渝湘毗邻区南华纪两界河-大塘坡期南华裂谷盆地复原(周琦等, 2016b)
Figure 2.
表 1 岩(矿)矿物性特征统计
Table 1. Statistics of physical properties of rocks (minerals)
岩性名称 地层代号 样点数/点 电阻率平均值/(Ω·m) 极化率平均值/% 地表黏土 Q 31 135.71 1.62 白云岩 €3-4ls、€2q、Z1d、Nh2l 52 3203.29 1.86 灰岩 €2q 38 5121.47 1.67 砂岩 €2p、€2b 40 1677.38 1.88 页岩 Nh2d2、€2jm 35 540.98 2.30 炭质页岩 Nh2d1 41 24.41 20.28 含砾砂岩 Nh3n、Nh2t 45 1662.41 2.76 板岩 Pt3h 68 1382.70 2.22 氧化锰矿石 Nh2d1 30 49.86 8.27 块状锰矿石 Nh2d1 35 19.04 11.98 
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CHAVE A D, JONES A G, 2012. The magnetotelluric method[M]. Cambridge: Cambridge University Press.
DAI C G, ZHANG H, HUANG Q H, 2008. Typical tectonic styles and their geologic significance in eastern Guizhou province[J]. Journal of Geomechanics, 14(4): 339-345. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTotal-DZLX200804004.htm
DAI C G, CHEN J S, LU D B, et al., 2010. Wuling orogeny in eastern Guizhou and its adjacent regions and its geological significance[J]. Journal of Geomechanics, 16(1): 78-84. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-DZLX201001011.htm
DE GROOT-HEDLIN C, CONSTABLE S C, 1990. Occam's inversion to generate smooth, two-dimensional models from magnetotelluric data[J]. Geophysics, 55(12): 1613-1624. doi: 10.1190/1.1442813
DI Q Y, ZHU R X, XUE G Q, et al., 2019. New development of the Electromagnetic (EM) methods for deep exploration[J]. Chinese Journal of Geophysics, 62(6): 2128-2138. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTotal-DQWX201906012.htm
HAN Q, HU X Y, CHENG Z P, et al., 2015. A study of two-dimensional MT inversion with steep topography using the adaptive unstructured finite element method[J]. Chinese Journal of Geophysics, 58(12): 4675-4684. (in Chinese with English abstract) http://www.researchgate.net/publication/292801505_A_study_of_two-dimensional_MT_inversion_with_steep_topography_using_the_adaptive_unstructured_finite_element_method
HE M X, PEI F G, FANG H, et al., 2017. The application of audio frequency magnetotelluric sounding to the investigation of gas hydrate in the Hala Lake depression of the Qilian Mountain[J]. Geophysical and Geochemical Exploration, 41(6): 1167-1174. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-WTYH201706024.htm
HE S, YANG B N, LI H L, et al., 2019. Identification of Ⅳ Graben tectonics of southeast Chongqing by AMT method and its significance[J]. Geological Science and Technology Information, 38(1): 270-276. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTotal-DZKQ201901031.htm
JIRACEK G R, 1990. Near-surface and topographic distortions in electromagnetic induction[J]. Surveys in Geophysics, 11(2): 163-203. http://pdfs.semanticscholar.org/9d9d/96c46845e79e64b79aeb3fe9eda6c7b69a5e.pdf
KANG M, HU X Y, KANG J, et al., 2017. Compared of magnetotelluric 2D inversion methods[J]. Progress in Geophysics, 32(2): 476-486. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-DQWJ201702005.htm
LI J M, 2004. Technical guide for induced polarization method[M]. Beijing: Geological Publishing House. (in Chinese)
LI J W, ZHAO X F, DENG X D, et al., 2019. An overview of the advance on the study of China's ore deposits during the last seventy years in China[J]. Scientia Sinica (Terrae), 49(11): 1720-1771. (in Chinese with English abstract) http://www.researchgate.net/publication/339199131_xinzhongguochengliyilaizhongguokuangchuangxueyanjiuruoganzhongyaojinzhan_An_overview_of_the_advance_on_the_study_of_China's_ore_deposits_during_the_last_seventy_years_in_Chinese
LI X, 2014. Experience and enlightenment of great prospecting achievements in Tongren Songtao manganese ore exploration area, Guizhou[J]. Mineral Deposits, 33(S1): 893-894. (in Chinese with English abstract)
LI Z, WU Z H, WANG J M, et al., 2021. Using EH4 audio-magnetotelluric sounder to detect the gigantic Qiaojia paleo-landslide and its structural characteristics[J]. Journal of Geomechanics, 27(2): 317-325. (in Chinese with English abstract) http://qikan.cqvip.com/Qikan/Article/Detail?id=7105927807
LIU X C, 2019. Finite-element simulations of structure-fluid coupling: a case study in vein-type tungsten deposits[J]. Journal of Geomechanics, 25(S1): 163-169. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTotal-DZLX2019S1028.htm
MI H Z, 2019. Research status and development thinking of underground geophysical exploration techniques for metal deposits[J]. Mineral exploration, 10(3): 601-605. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTotal-YSJS201903025.htm
QIN Y, AN Z Z, WANG J W, et al., 2013. The discovery and geological characteristics of the super-large sized Daotuo manganese deposit in Songtao, Guizhou[J]. Mineral Exploration, 4(4): 345-355. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-YSJS201304016.htm
RODI W, MACKIE R L, 2001. Nonlinear conjugate gradients algorithm for 2-D magnetotelluric inversion[J]. Geophysics, 66(1): 174-187. doi: 10.1190/1.1444893
SMITH J T, BOOKER J R, 1991. Rapid inversion of two- and three-dimensional magnetotelluric data[J]. Journal of Geophysical Research: Solid Earth, 96(B3): 3905-3922. doi: 10.1029/90JB02416
XIONG G C, 1994. Development of magnetic exploration searching for metallic ore deposits in China[J]. Chinese Journal of Geophysics, 37(S1): 437-443. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-DQWX4S1.040.htm
XUE G Q, 2004. On surveying depth by transient electromagnetic sounding method[J]. Oil Geophysical Prospecting, 39(5): 575-578. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-SYDQ200405015.htm
YAN S, SHI X X, CHEN M S, 2009. The probing depth of transient electromagnetic field method[J]. Chinese Journal of Geophysics, 52(6): 1583-1591. (in Chinese with English abstract) http://www.oalib.com/paper/1568938
YANG B N, HU X Y, ZHOU Q, et al., 2018. An audio-frequency magnetotellurics method study on the exploration technology of ancient natural gas seepage sedimentary-type manganese deposit of Nanhua period in South China[J]. Acta Geologica Sinica, 35(4): 369-375. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTotal-GZDZ201804016.htm
YANG S T, TU F F, 2017. A major breakthrough has been made in manganese ore prospecting in China[J]. Management and Research on Scientific & Technological Achievements (7): 74-75. (in Chinese) http://en.cnki.com.cn/Article_en/CJFDTOTAL-GZDZ201702001.htm
YANG Y R, ZHANG Y P, MIAO Y S, et al., 2012. Relationship between prospecting line length and measured depth in high-density electric method[J]. Coal Geology of China, 24(6): 63-67. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZGMT201206017.htm
ZHANG C H, 1985. The problem of magnetic prospecting[M]. Beijing: Geological Publishing House. (in Chinese)
ZHANG S, ZHOU Q, ZHANG P Y, et al., 2018. Geological characteristics and prospecting practice of Pujue super-large manganese deposit in Songtao, Guizhou[J]. Guizhou Geology, 35(4): 304-313. (in Chinese with English abstract)
ZHOU Q, 1985. A simple inversion of 1D magnetotelluric sounding curve: Bostick inversion method and its application[J]. Oil Geophysical Prospecting, 20(1): 80-88. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-SYDQ198501008.htm
ZHOU Q, DU Y S, QIN Y, 2013. Ancient natural gas seepage sedimentary-type manganese metallogenic system and ore-forming model: A case study of 'Datangpo type' manganese deposits formed in rift basin of Nanhua period along Guizhou-Hunan-Chongqing border area[J]. Mineral Deposits, 32(3): 457-466. (in Chinese with English abstract) http://www.researchgate.net/publication/290485249_Ancient_natural_gas_seepage_sedimentary_type_manganese_metallogenic_system_and_ore_forming_model_A_case_study_of_'Datangpo_type'_manganese_deposits_formed_in_rift_basin_of_Nanhua_period_along_Guizhou-
ZHOU Q, DU Y S, YUAN L J, et al., 2016a. Prediction of geologic exploration in Songtao manganese national fully equipped exploration district in Tongren, Guizhou[J]. Guizhou Geology, 33(4): 237-244. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-GZDZ201604001.htm
ZHOU Q, DU Y S, YUAN L J, et al., 2016b. The structure of the Wuling rift basin and its control on the manganese deposit during the Nanhua period in Guizhou-Hunan-Chongqing border area, South China[J]. Earth Science-Journal of China University of Geosciences, 41(2): 177-188. (in Chinese with English abstract) doi: 10.3799/dqkx.2016.014
ZHOU Q, DU Y S, YUAN L J, et al., 2017. Exploration models of ancient natural gas seep sedimentary-type manganese ore deposit: A case study of the Nanhua period "Datangpo" type manganese ore in the conjunction area of Guizhou, Hunan and Chongqing[J]. Acta Geologica Sinica, 91(10): 2285-2298. (in Chinese with English abstract)
ZHOU Q, DU Y S, 2019. Ancient natural gas seepage sedimentary-type manganese deposit in South China[M]. Beijing: Science Press. (in Chinese)
戴传固, 张慧, 黄清华, 2008. 黔东地区典型构造样式特征及其地质意义[J]. 地质力学学报, 14(4): 339-345. doi: 10.3969/j.issn.1006-6616.2008.04.004 https://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=20080404&journal_id=dzlxxb
戴传固, 陈建书, 卢定彪, 等, 2010. 黔东及邻区武陵运动及其地质意义[J]. 地质力学学报, 16(1): 78-84. doi: 10.3969/j.issn.1006-6616.2010.01.010 https://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=20100110&journal_id=dzlxxb
底青云, 朱日祥, 薛国强, 等, 2019. 我国深地资源电磁探测新技术研究进展[J]. 地球物理学报, 62(6): 2128-2138. https://www.cnki.com.cn/Article/CJFDTOTAL-DQWX201906012.htm
韩骑, 胡祥云, 程正璞, 等, 2015. 自适应非结构有限元MT二维起伏地形正反演研究[J]. 地球物理学报, 58(12): 4675-4684. doi: 10.6038/cjg20151228
何梅兴, 裴发根, 方慧, 等, 2017. 音频大地电磁测深在祁连山哈拉湖坳陷天然气水合物调查中的应用[J]. 物探与化探, 41(6): 1167-1174. https://www.cnki.com.cn/Article/CJFDTOTAL-WTYH201706024.htm
何帅, 杨炳南, 李核良, 等, 2019. 音频大地电磁法对渝东南Ⅳ级地堑构造的识别及意义[J]. 地质科技情报, 38(1): 270-276. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201901031.htm
康敏, 胡祥云, 康健, 等, 2017. 大地电磁二维反演方法分析对比[J]. 地球物理学进展, 32(2): 476-486. https://www.cnki.com.cn/Article/CJFDTOTAL-DQWJ201702005.htm
李金铭, 2004. 激发极化法方法技术指南[M]. 北京: 地质出版社.
李建威, 赵新福, 邓晓东, 等, 2019. 新中国成立以来中国矿床学研究若干重要进展[J]. 中国科学: 地球科学, 49(11): 1720-1771. https://www.cnki.com.cn/Article/CJFDTOTAL-JDXK201911003.htm
李啸, 2014. 贵州铜仁松桃锰矿整装勘查区找矿重大成果的经验与启示[J]. 矿床地质, 33(S1): 893-894. https://www.cnki.com.cn/Article/CJFDTOTAL-KCDZ2014S1449.htm
李忠, 吴中海, 汪金明, 等, 2021. 利用EH4音频大地电磁测深仪探测巧家巨型古滑坡及其结构面特征[J]. 地质力学学报, 27(2): 317-325. https://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=20210214&journal_id=dzlxxb
刘向冲, 2019. 构造-流体耦合有限元模拟: 以石英脉型钨矿为例[J]. 地质力学学报, 25(S1): 163-169. https://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=2019S128&journal_id=dzlxxb
米宏泽, 2019. 金属矿地下地球物理勘查技术的研究现状与发展思考[J]. 矿产勘查, 10(3): 601-605. doi: 10.3969/j.issn.1674-7801.2019.03.024
覃英, 安正泽, 王佳武, 等, 2013. 贵州松桃锰矿整装勘查区道坨隐伏超大型锰矿床的发现及地质特征[J]. 矿产勘查, 4(4): 345-355. doi: 10.3969/j.issn.1674-7801.2013.04.001
熊光楚, 1994. 金属矿区磁法勘探的进展与展望[J]. 地球物理学报, 37(S1): 437-443. https://www.cnki.com.cn/Article/CJFDTOTAL-DQWX4S1.040.htm
薛国强, 2004. 论瞬变电磁测深法的探测深度[J]. 石油地球物理勘探, 39(5): 575-578. doi: 10.3321/j.issn:1000-7210.2004.05.015
闫述, 石显新, 陈明生, 2009. 瞬变电磁法的探测深度问题[J]. 地球物理学报, 52(6): 1583-1591. doi: 10.3969/j.issn.0001-5733.2009.06.020
杨炳南, 胡祥云, 周琦, 等, 2018. 华南南华纪古天然气渗漏沉积型锰矿AMT勘查技术方法研究[J]. 贵州地质, 35(4): 369-375. doi: 10.3969/j.issn.1000-5943.2018.04.016
杨胜堂, 涂飞飞, 2017. 我国锰矿找矿获得重大突破[J]. 科技成果管理与研究 (7): 74-75. doi: 10.3772/j.issn.1673-6516.2017.07.029
杨玉蕊, 张义平, 缪玉松, 等, 2012. 高密度电法中勘探线长度与测深关系浅析[J]. 中国煤炭地质, 24(6): 63-67. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGMT201206017.htm
张传华, 1985. 磁法勘探问题[M]. 北京: 地质出版社.
张遂, 周琦, 张平壹, 等, 2018. 贵州松桃普觉超大型锰矿床主要特征与找矿实践[J]. 贵州地质, 35(4): 304-313. doi: 10.3969/j.issn.1000-5943.2018.04.007
周虬, 1985. 一种简易的一维大地电磁测深反演方法: 博斯蒂克法反演及其应用[J]. 石油地球物理勘探, 20(1): 80-88. https://www.cnki.com.cn/Article/CJFDTOTAL-SYDQ198501008.htm
周琦, 杜远生, 覃英, 2013. 古天然气渗漏沉积型锰矿床成矿系统与成矿模式: 以黔湘渝毗邻区南华纪"大塘坡式"锰矿为例[J]. 矿床地质, 32(3): 457-466. doi: 10.3969/j.issn.0258-7106.2013.03.001
周琦, 杜远生, 袁良军, 等, 2016a. 贵州铜仁松桃锰矿国家整装勘查区地质找矿主要进展及潜力预测[J]. 贵州地质, 33(4): 237-244. https://www.cnki.com.cn/Article/CJFDTOTAL-GZDZ201604001.htm
周琦, 杜远生, 袁良军, 等, 2016b. 黔湘渝毗邻区南华纪武陵裂谷盆地结构及其对锰矿的控制作用[J]. 地球科学, 41(2): 177-188. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201602001.htm
周琦, 杜远生, 袁良军, 等, 2017. 古天然气渗漏沉积型锰矿床找矿模型: 以黔湘渝毗邻区南华纪"大塘坡式"锰矿为例[J]. 地质学报, 91(10): 2285-2298. doi: 10.3969/j.issn.0001-5717.2017.10.010
周琦, 杜远生, 2019. 华南古天然气渗漏沉积型锰矿[M]. 北京: 科学出版社.
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