气候变化领域集成服务门户(CCPortal): Application of tensor CSAMT with high-power orthogonal signal sources in Jiama porphyry copper deposit, South Tibet

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DOI	10.31035/cg2021065
	Application of tensor CSAMT with high-power orthogonal signal sources in Jiama porphyry copper deposit, South Tibet
	Yu, Peng-liang; Qu, Ting; He, Ri-zheng; Liu, Jian-li; Wang, Su-fen; Chen, Xiao-long
发表日期	2023
ISSN	2096-5192
起始页码	37
结束页码	49
卷号	6 期号:1
英文摘要	The Jiama porphyry copper deposit in Tibet is one of the proven supergiant copper deposits in the Qinghai-Tibet Plateau at present, with the reserves of geological resources equivalent to nearly 20x106 t. However, it features wavy and steep terrain, leading to extremely difficult field operation and heavy interference. This study attempts to determine the effects of the tensor controlled-source audiomagnetotellurics (CSAMT) with high-power orthogonal signal sources (also referred to as the high-power tensor CSAMT) when it is applied to the deep geophysical exploration in plateaus with complex terrain and mining areas with strong interference. The test results show that the high current provided by the highpower tensor CSAMT not only greatly improved the signal-to-noise ratio but also guaranteed that effective signals were received in the case of a long transmitter-receiver distance. Meanwhile, the tensor data better described the anisotropy of deep geologic bodies. In addition, the tests also show that when the transmitting current reaches 60 A, it is still guaranteed that strong enough signals can be received in the case of the transmitter-receiver distance of about 25 km, sounding curves show no near field effect, and effective exploration depth can reach 3 km. The 2D inversion results are roughly consistent with drilling results, indicating that the high-power tensor CSAMT can be used to achieve nearly actual characteristics of underground electrical structures. Therefore, this method has great potential for application in deep geophysical exploration in plateaus and mining areas with complex terrain and strong interference, respectively. This study not only serves as important guidance on the prospecting in the Qinghai-Tibet Plateau but also can be used as positive references for deep mineral exploration in other areas.
关键词	Jiama porphyry copper deposit Supergiant copper polymetallic deposit Tensor CSAMT of 150 kw High power 2D inversion Deep prospecting Mineral exploration engineering Xizang (Tibet)
英文关键词	POLYMETALLIC DEPOSIT
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:000962190400001
来源期刊	CHINA GEOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282784
作者单位	China Geological Survey; Chinese Academy of Geological Sciences
推荐引用方式 GB/T 7714	Yu, Peng-liang,Qu, Ting,He, Ri-zheng,et al. Application of tensor CSAMT with high-power orthogonal signal sources in Jiama porphyry copper deposit, South Tibet[J],2023,6(1).
APA	Yu, Peng-liang,Qu, Ting,He, Ri-zheng,Liu, Jian-li,Wang, Su-fen,&Chen, Xiao-long.(2023).Application of tensor CSAMT with high-power orthogonal signal sources in Jiama porphyry copper deposit, South Tibet.CHINA GEOLOGY,6(1).
MLA	Yu, Peng-liang,et al."Application of tensor CSAMT with high-power orthogonal signal sources in Jiama porphyry copper deposit, South Tibet".CHINA GEOLOGY 6.1(2023).