Heat, volume and chemical fluxes from submarine venting: A synthesis of results from the Rainbow hydrothermal field, 36°N MAR
Heat, volume and chemical fluxes from submarine venting: A synthesis of results from the Rainbow hydrothermal field, 36°N MAR
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DOI：
10.1016/j.dsr.2009.12.011
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发表时间：
2010-04-01
影响因子：
2.4
通讯作者：
Edmonds, H. N.
中科院分区：
文献类型：
--
作者：
German, C. R.;Thurnherr, A. M.;Edmonds, H. N.
高温热液活动发生在所有洋盆和沿着所有扩张速率的脊顶。虽然人们早就认识到，与这种通风相关的通量是大的，其对海洋地球化学的影响的精确量化已被证明是难以捉摸的。在这里，我们报告了一个全面的研究热，流体和化学通量从一个单一的海底热液场。为了实现这一目标，我们利用了彩虹热液场上方分散的非浮力羽流的整合性质，彩虹热液场是大西洋中脊上一个寿命长且受构造影响的高温喷口。我们的计算产生的热量和体积通量的高温流体离开海底的类似0.5 GW和450 Ls（-1），连同伴随的化学通量，铁。Mn和CH 4分别接近10、接近1和接近1 mol s（-1）。还计算了与富铁羽流颗粒有关的另外25种化学物质的伴随通量，这些化学物质在沉降到海底之前被运离Rainbow喷口。大西洋中脊上所有已知地点中有一半是长寿和构造托管系统，如果这些模式沿着所有慢速和超慢速扩张脊持续存在，这里报道的这种高温排放可以占轴上热液热通量的大约50%，沿着大约30，000 km，2010 Elsevier Ltd保留所有权利
High-temperature hydrothermal activity occurs in all ocean basins and along ridge crests of all spreading rates. While it has long been recognized that the fluxes associated with such venting are large, precise quantification of their impact on ocean biogeochemistry has proved elusive Here, we report a comprehensive study of heat, fluid and chemical fluxes from a single submarine hydrothermal field. To achieve this, we have exploited the integrating nature of the non-buoyant plume dispersing above the Rainbow hydrothermal field, a long-lived and tectonically hosted high-temperature vent site on the Mid-Atlantic Ridge. Our calculations yield heat and volume fluxes for high-temperature fluids exiting the seafloor of similar to 0.5 GW and 450 Ls(-1), together with accompanying chemical fluxes, for Fe. Mn and CH4 of similar to 10, similar to 1 and similar to 1 mol s(-1), respectively. Accompanying fluxes for 25 additional chemical species that are associated with Fe-rich plume particles have also been calculated as they are transported away from the Rainbow vent site before settling to the seabed High-temperature venting has been found to recur at least once every similar to 100 km along all slow-spreading ridges investigated to-date, with half of all known sites on the Mid-Atlantic Ridge occurring as long-lived and tectonically hosted systems If these patterns persist along all slow- and ultraslow-spreading ridges, high-temperature venting of the kind reported here could account for similar to 50% of the on-axis hydrothermal heat flux along similar to 30,000 km of the similar to 55,000 km global ridge crest (C) 2010 Elsevier Ltd All rights reserved