Energy yields from chemolithotrophic metabolisms in igneous basement of the Juan de Fuca ridge flank system
Energy yields from chemolithotrophic metabolisms in igneous basement of the Juan de Fuca ridge flank system
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DOI：
10.1016/j.chemgeo.2012.10.053
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发表时间：
2013-01-28
期刊：
影响因子：
3.9
通讯作者：
Amend, Jan P.
中科院分区：
文献类型：
--
作者：
Boettger, Jason;Lin, Huei-Ting;Amend, Jan P.
上层海洋基底的渗透性岩石含有海水来源的流体，估计相当于全球海洋体积的2%。这代表了一个非常大的潜在地下生物圈支持的化学合成。最近收集的高完整性样品的沉积年轻的玄武岩基底上的胡安德富卡脊侧翼，关闭海岸的温哥华岛（加拿大）和华盛顿（美国），和随后的化学分析允许代谢氧化还原反应能量的数值模拟。在这里，吉布斯自由能的值为潜在的化能无机营养净反应计算在基底流体和基底流体和夹带的海水可能混合的区域;能量产量报告每摩尔电子转移和每公斤的基底流体的基础上。在纯基底流体中，所研究的无氧呼吸过程的能量产量是贫血的，
The permeable rocks of the upper oceanic basement contain seawater-sourced fluids estimated to be similar to 2% of the global ocean volume. This represents a very large potential subsurface biosphere supported by chemosynthesis. Recent collection of high integrity samples of basement fluid from the sedimented young basaltic basement on the Juan de Fuca Ridge flanks, off the coasts of Vancouver Island (Canada) and Washington (USA), and subsequent chemical analyses permit numerical modeling of metabolic redox reaction energetics. Here, values of Gibbs free energy for potential chemolithotrophic net reactions were calculated in basement fluid and in zones where basement fluid and entrained seawater may mix; the energy yields are reported both on a per mole electrons transferred and on a per kg of basement fluid basis. In pure basement fluid, energy yields from the anaerobic respiration processes investigated are anemic, releasing