DOI: 10.1002/2014GL062791
论文题名: Absolute magnetization of the seafloor at a basalt-hosted hydrothermal site: Insights from a deep-sea submersible survey
作者: Szitkar F. ; Dyment J. ; Fouquet Y. ; Choi Y. ; Honsho C.
刊名: Geophysical Research Letters
ISSN: 0094-8938
EISSN: 1944-8669
出版年: 2015
卷: 42, 期: 4 起始页码: 1046
结束页码: 1052
语种: 英语
英文关键词: absolute magnetization
; basalt-hosted hydrothermal site
; near-seafloor magnetic
Scopus关键词: Autonomous underwater vehicles
; Basalt
; Magnetic polarity
; Magnetization
; Basalt-hosted
; Bathymetric data
; Deep-sea submersibles
; High resolution
; Magnetic signals
; Magnetization intensities
; Sea floor
; Sulfide deposit
; Submersibles
; altitude
; autonomous underwater vehicle
; basalt
; bathymetric survey
; data acquisition
; deep sea
; hydrothermal system
; lava flow
; magnetization
; seafloor
; submersible
; sulfide
; vector
英文摘要: The analysis of high-resolution vector magnetic data acquired by deep-sea submersibles (DSSs) requires the development of specific approaches adapted to their uneven tracks. We present a method that takes advantage of (1) the varying altitude of the DSS above the seafloor and (2) high-resolution multibeam bathymetric data acquired separately, at higher altitude, by an Autonomous Underwater Vehicle, to estimate the absolute magnetization intensity and the magnetic polarity of the shallow subseafloor along the DSS path. We apply this method to data collected by DSS Nautile on a small active basalt-hosted hydrothermal site. The site is associated with a lack of magnetization, in agreement with previous findings at the same kind of sites: the contrast between nonmagnetic sulfide deposits/stockwork zone and strongly magnetized basalt is sufficient to explain the magnetic signal observed at such a low altitude. Both normal and reversed polarities are observed in the lava flows surrounding the site, suggesting complex history of accumulating volcanic flows. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84924916018&doi=10.1002%2f2014GL062791&partnerID=40&md5=e687ddf2f5ff6ed38508f3107596a763
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8554
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Institut de Physique du Globe de Paris, Université Paris Diderot, CNRS UMR 7154, Paris, France
Recommended Citation:
Szitkar F.,Dyment J.,Fouquet Y.,et al. Absolute magnetization of the seafloor at a basalt-hosted hydrothermal site: Insights from a deep-sea submersible survey[J]. Geophysical Research Letters,2015-01-01,42(4).