Primary study on transient electromagnetic induced polarization effects of deep-sea polymetallic sulfides

Li Ze; Tao Chunhui; Zhu Zhongmin; Deng Xianming

doi:10.3969/j.issn.0253-4193.2019.12.004

Volume 41 Issue 12

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Li Ze，Tao Chunhui，Zhu Zhongmin, et al. Primary study on transient electromagnetic induced polarization effects of deep-sea polymetallic sulfides[J]. Haiyang Xuebao，2019, 41(12)：39–50，doi:10.3969/j.issn.0253−4193.2019.12.004

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Primary study on transient electromagnetic induced polarization effects of deep-sea polymetallic sulfides

doi: 10.3969/j.issn.0253-4193.2019.12.004

Li Ze^{1, 2
,},
Tao Chunhui^{1, 2, 3
,
,},
Zhu Zhongmin^{1, 2, 4},
Deng Xianming^{1, 2}

1.
Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
2.
Key Laboratory of Submarine Geoscience, State Ocenic Administration,Hangzhou 310012, China
3.
School of Oceanography, Shanghai Jiao Tong University, Shanghai 200240, China
4.
College of Geophysics, China University of Petroleum, Beijing 102249, China

Received Date: 2018-12-15
Rev Recd Date: 2019-03-13

Available Online: 2021-04-21

Publish Date: 2019-12-25

Abstract

Abstract

Transient electromagnetic method (TEM) is an effective method for deep-sea polymetallic sulfide exploration. High-grade metal components in seafloor polymetallic sulfides cause extremely strong induced polarization effects and have a significant impact on transient electromagnetic response. In this paper, the inductive effects of deep-sea polymetallic sulfides were analyzed through laboratory measurement and numerical simulation. First, systematic electrical tests were carried out on rock ore samples from the hydrothermal vent fields on the southwest Indian Ocean Ridge. The complex resistivity of typical sulfides has a phase shift of up to 160 mrad in the frequency domain. The time domain and frequency domain measurements show that the polarizability parameter is a good indicator to distinguish sulfide minerals and surrounding rocks. Using the Cole-Cole model to interpret the complex resistivity to obtain the characteristic parameters of complex resistivity, the relationship between parameters and the composition and structure of the massive sulfide was analyzed, and the typical sulfides were classified based on the polarizability parameter. The induced polarization parameters of the typical sulfides were used to calculate the transient electromagnetic response of the layered medium, which show that the influence of induced polarization effect can be observed simultaneously in the best observation window of the TEM response of the deep-sea polymetallic sulfide deposit. Although the transient response is distorted in the late stage of the acquisition window, in the early stage of signal reception, the induced polarization effect effectively enhances the detection capability of the TEM for deep-sea polymetallic sulfides, which provides an explanation basis for the transient electromagnetic measurement data.
- transient electromagnetic method,
- induced polarization effects,
- Cole-Cole model,
- deep-sea polymetallic sulfide

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References(13)

References

[1]	Rona P A. Resources of the sea floor[J]. Science, 2003, 299(5607): 673−674. doi: 10.1126/science.1080679
[2]	Cathles L M. What processes at mid-ocean ridges tell us about volcanogenic massive sulfide deposits[J]. Mineralium Deposita, 2011, 46(5/6): 639−657.
[3]	Hannington M, Jamieson J, Monecke T, et al. The abundance of seafloor massive sulfide deposits[J]. Geology, 2011, 39(12): 1155−1158. doi: 10.1130/G32468.1
[4]	Tao Chunhui, Lin Jian, Guo Shiqin, et al. First active hydrothermal vents on an ultraslow-spreading center: Southwest Indian Ridge[J]. Geology, 2012, 40(1): 47−50. doi: 10.1130/G32389.1
[5]	Tao Chunhui, Wu Tao, Jin Xiaobing, et al. Petrophysical characteristics of rocks and sulfides from the SWIR hydrothermal field[J]. Acta Oceanologica Sinica, 2013, 32(12): 118−125. doi: 10.1007/s13131-013-0367-4
[6]	Spagnoli G, Hannington M, Bairlein K, et al. Electrical properties of seafloor massive sulfides[J]. Geo-Marine Letters, 2016, 36(3): 235−245. doi: 10.1007/s00367-016-0439-5
[7]	Revil A, Florsch N, Mao Deqiang. Induced polarization response of porous media with metallic particles—Part 1: a theory for disseminated semiconductors[J]. Geophysics, 2015, 80(5): D525−D538. doi: 10.1190/geo2014-0577.1
[8]	Komori S, Masaki Y, Tanikawa W, et al. Depth profiles of resistivity and spectral IP for active modern submarine hydrothermal deposits: a case study from the Iheya North Knoll and the Iheya Minor Ridge in Okinawa Trough, Japan[J]. Earth, Planets and Space, 2017, 69(1): 114. doi: 10.1186/s40623-017-0691-6
[9]	Zhdanov M S, Burtman V, Endo M, et al. Complex resistivity of mineral rocks in the context of the generalised effective-medium theory of the induced polarisation effect[J]. Geophysical Prospecting, 2018, 66(4): 798−817. doi: 10.1111/1365-2478.12581
[10]	Liao Shili, Tao Chunhui, Li Huaiming, et al. Bulk geochemistry, sulfur isotope characteristics of the Yuhuang-1 hydrothermal field on the ultraslow-spreading Southwest Indian Ridge[J]. Ore Geology Reviews, 2018, 96: 13−27. doi: 10.1016/j.oregeorev.2018.04.007
[11]	Archie G E. The electrical resistivity log as an aid in determining some reservoir characteristics[J]. Petroleum Transactions of the AIME, 2007, 146(1): 54−62.
[12]	Dias F B, Plomp L, Veldhuis J B J. Trends in polymer electrolytes for secondary lithium batteries[J]. Journal of Power Sources, 2000, 88(2): 169−191. doi: 10.1016/S0378-7753(99)00529-7
[13]	Swidinsky A, Hölz S, Jegen M. On mapping seafloor mineral deposits with central loop transient electromagnetics[J]. Geophysics, 2012, 77(3): E171−E184. doi: 10.1190/geo2011-0242.1