naa a22 4500 510753906 CHVBK 20180411083115.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s13131-013-0392-3 doi (NATIONALLICENCE)springer-10.1007/s13131-013-0392-3 TEM investigations of South Atlantic Ridge 13.2°S hydrothermal area [Elektronische Daten] [Chunhui Tao, Wei Xiong, Zhenzhu Xi, Xianming Deng, Yixian Xu] According to the exploration contract about polymetallic sulfides in the SWIR (Southwest Indian Ridge) signed by China with the International Seabed Authority, to delineate sulfide minerals and estimate resource quantity are urgent tasks. We independently developed our first coincident loop Transient Electromagnetic Method (TEM) device in 2010, and gained the TEM data for seafloor sulfide at South Atlantic Ridge 13.2°S in June 2011. In contrast with the widely applied CSEM (Marine controlled-source electromagnetic) method, whose goal is to explore hydrocarbons (oil/gas) of higher resistivity than seawater from 102 to 103 m below the sea floor, the TEM is for low resistivity minerals, and the target depth is from 0 to 100 m below the sea floor. Based on the development of complex sulfide geoelectrial models, this paper analyzed the TEM data obtained, proposing a new method for seafloor sulfide detection. We present the preliminary trial results, in the form of apparent resistivity sections for both half-space and full-space conditions. The results correspond well with the observations of the actual hydrothermal vent area, and the detection depth reached 50-100m below the bed, which verified the capability of the equipment. The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg, 2013 transient electromagnetic method nationallicence mid-ocean ridge hydrothermal activity nationallicence seafloor polymetallic sulfides nationallicence South Atlantic Ridge nationallicence Tao Chunhui The Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut Xiong Wei The Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut Xi Zhenzhu School of Geosciences and Info Physics, Central South University, 410083, Changsha, China aut Deng Xianming The Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut Xu Yixian Institute of Geophysics and Geomatics, China University of Geosciences, 430074, Wuhan, China aut Acta Oceanologica Sinica Springer Berlin Heidelberg 32/12(2013-12-01), 68-74 0253-505X 32:12<68 2013 32 13131 https://doi.org/10.1007/s13131-013-0392-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s13131-013-0392-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tao Chunhui The Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut NATIONALLICENCE 700 1- Xiong Wei The Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut NATIONALLICENCE 700 1- Xi Zhenzhu School of Geosciences and Info Physics, Central South University, 410083, Changsha, China aut NATIONALLICENCE 700 1- Deng Xianming The Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut NATIONALLICENCE 700 1- Xu Yixian Institute of Geophysics and Geomatics, China University of Geosciences, 430074, Wuhan, China aut NATIONALLICENCE 773 0- Acta Oceanologica Sinica Springer Berlin Heidelberg 32/12(2013-12-01), 68-74 0253-505X 32:12<68 2013 32 13131 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer