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DOI | 10.1002/2016GL072326 |
A fault-driven circulation model for the Lost City Hydrothermal Field | |
Lowell, Robert P. | |
2017-03-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
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 |
推荐引用方式 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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