GSTDTAP  > 气候变化
DOI10.1002/2016GL072326
A fault-driven circulation model for the Lost City Hydrothermal Field
Lowell, Robert P.
2017-03-28
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2017
卷号44期号:6
文章类型Article
语种英语
国家USA
英文摘要

The Lost City Hydrothermal Field on the Atlantis Massif is an off-axis hydrothermal system, hosted in serpentinized ultramafic and metagabbroic rocks, that discharges through high-permeability faults and fractures. High-pH fluids vent through carbonate chimneys with temperatures ranging between 24 degrees C and 91 degrees C, and vent fluid geochemistry indicates quantitative removal of magnesium and water-rock reactions consistent with heating to between 250 degrees C and 300 degrees C, conductive cooling, and mixing with seawater. This paper develops a relatively simple, steady state, fault-controlled fluid circulation and crustal heat transfer model that is consistent with these observations. The model results predict that the (1) heat output at Lost City is similar to 4x10(4)W, (2) circulation depth is approximately 2.7km, and (3) permeability of the fault zone is similar to 10(-14)m(2). The model assumes that the hydrothermal system mines heat from the adjacent country rock, and it does not appear that heat from serpentinization reactions or cooling intrusions is needed to drive the system. Because it takes similar to 10(5)a for the current model to reach steady state, earlier episodes of hydrothermal activity at LCHF may have operated differently and vent temperatures may have been higher.


英文关键词Lost City Hydrothermal Field hydrothermal system modeling
领域气候变化
收录类别SCI-E
WOS记录号WOS:000399762700011
WOS关键词MID-ATLANTIC RIDGE ; VENT FIELD ; 30-DEGREES-N ; CONSTRAINTS ; SYSTEMS ; SERPENTINIZATION ; PERIDOTITE ; HYDRATION ; FLOW
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/28456
专题气候变化
作者单位Virginia Tech, Dept Geosci, Blacksburg, VA 24061 USA
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GB/T 7714
Lowell, Robert P.. A fault-driven circulation model for the Lost City Hydrothermal Field[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(6).
APA Lowell, Robert P..(2017).A fault-driven circulation model for the Lost City Hydrothermal Field.GEOPHYSICAL RESEARCH LETTERS,44(6).
MLA Lowell, Robert P.."A fault-driven circulation model for the Lost City Hydrothermal Field".GEOPHYSICAL RESEARCH LETTERS 44.6(2017).
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