Publication: Internal Structure of a Seafloor Massive Sulfide Deposit by Electrical Resistivity Tomography, Okinawa Trough
2
Issued Date
2019-10-28
Resource Type
ISSN
19448007
00948276
00948276
Other identifier(s)
2-s2.0-85074540983
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Geophysical Research Letters. Vol.46, No.20 (2019), 11025-11034
Suggested Citation
K. Ishizu, T. Goto, Y. Ohta, T. Kasaya, H. Iwamoto, C. Vachiratienchai, W. Siripunvaraporn, T. Tsuji, H. Kumagai, K. Koike Internal Structure of a Seafloor Massive Sulfide Deposit by Electrical Resistivity Tomography, Okinawa Trough. Geophysical Research Letters. Vol.46, No.20 (2019), 11025-11034. doi:10.1029/2019GL083749 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/50751
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Internal Structure of a Seafloor Massive Sulfide Deposit by Electrical Resistivity Tomography, Okinawa Trough
Abstract
©2019. American Geophysical Union. All Rights Reserved. Although seafloor massive sulfide (SMS) deposits are crucially important metal resources that contain high-grade metals such as copper, lead, and zinc, their internal structures and generation mechanisms remain unclear. This study obtained detailed near-seafloor images of electrical resistivity in a hydrothermal field off Okinawa, southwestern Japan, using deep-towed marine electrical resistivity tomography. The image clarified a semi-layered resistivity structure, interpreted as SMS deposits exposed on the seafloor, and another deep-seated SMS layer at about 40-m depth below the seafloor. The images reinforce our inference of a new mechanism of SMS evolution: Upwelling hydrothermal fluid is trapped under less-permeable cap rock. The deeper embedded SMS accumulates there. Then hydrothermal fluids expelled on the seafloor form exposed SMS deposits.