DOI: 10.1002/2015GL067335
论文题名: Modes of crustal accretion and their implications for hydrothermal circulation
作者: Theissen-Krah S. ; Rüpke L.H. ; Hasenclever J.
刊名: Geophysical Research Letters
ISSN: 0094-9399
EISSN: 1944-9130
出版年: 2016
卷: 43, 期: 3 起始页码: 1124
结束页码: 1131
语种: 英语
英文关键词: finite elements
; gabbro glacier
; mid-ocean ridges
; sheeted sill
Scopus关键词: Finite element method
; Ore deposits
; Submarine geology
; Chemical evolution
; Hydrothermal circulation
; Hydrothermal convection
; Hydrothermal ore deposit
; Mid-ocean ridges
; sheeted sill
; Spreading ridge
; Thermal structure
; Structural geology
; accretion
; crystallization
; finite element method
; hydrothermal circulation
; in situ measurement
; lower crust
; mid-ocean ridge
; numerical model
; ore deposit
英文摘要: Hydrothermal convection at mid-ocean ridges links the ocean's long-term chemical evolution to solid earth processes, forms hydrothermal ore deposits, and sustains the unique chemosynthetic vent fauna. Yet the depth extent of hydrothermal cooling and the inseparably connected question of how the lower crust accretes remain poorly constrained. Here based on coupled models of crustal accretion and hydrothermal circulation, we provide new insights into which modes of lower crust formation and hydrothermal cooling are thermally viable and most consistent with observations at fast-spreading ridges. We integrate numerical models with observations of melt lens depth, thermal structure, and melt fraction. Models matching all these observations always require a deep crustal-scale hydrothermal flow component and less than 50% of the lower crust crystallizing in situ. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959440853&doi=10.1002%2f2015GL067335&partnerID=40&md5=f609757c9d83608580dd4cdb37d4ea60
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10362
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: GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Recommended Citation:
Theissen-Krah S.,Rüpke L.H.,Hasenclever J.. Modes of crustal accretion and their implications for hydrothermal circulation[J]. Geophysical Research Letters,2016-01-01,43(3).