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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >An internally consistent, probabilistic, determination of ridge-axis hydrothermal fluxes from basalt-hosted systems
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An internally consistent, probabilistic, determination of ridge-axis hydrothermal fluxes from basalt-hosted systems

机译：内部一致，概率确定玄武岩托管系统的脊轴热液通量

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摘要

High-temperature hydrothermal systems at mid-ocean ridges play a critical role in global geochemical cycles. Most of the magmatic heat driving hydrothermal circulation along the global mid-ocean ridge system is released into basalt-hosted systems exemplified by intermediate- to fast-spreading ridges. Constraints on the fluid and chemical fluxes associated with these systems come from the compositions of high-temperature hydrothermal vent fluids and the compositions of altered sheeted dikes. Global data compilations of both of these data types, including 20 mineral components, 10 major fluid species, 13 trace elements and 6 isotope ratios, have been jointly fit using a numerical Bayesian inversion procedure. This new approach provides the first internally consistent estimates of fluid and chemical fluxes, with rigorously quantified uncertainties, for a broad suite of elements. The resulting global fluid flux is 8.0±2.1×10~(12)kgyr~(-1), at a water-dike mass ratio of 0.92, sufficient to cool the sheeted dike complex from magmatic to hydrothermal temperatures and remove ~50% of the latent heat of crystallization of the plutonic complex. For conservative elements, the fluxes represent inputs into the ocean and should allow more accurate models of the controls on modern and paleo-seawater chemistry to be developed.
机译：大洋中脊的高温热液系统在全球地球化学循环中起着至关重要的作用。沿着全球中海脊系统的大部分岩浆热驱动热液循环被释放到玄武岩为主的系统中，例如中度到快速扩散的海脊。与这些系统相关的流体和化学通量的约束来自于高温热液排放流体的成分和改变的片状堤防的成分。这两种数据类型的全球数据汇编，包括20种矿物成分，10种主要流体种类，13种微量元素和6种同位素比，均已通过数值贝叶斯反演程序进行了拟合。对于大量元素，这种新方法提供了流体和化学通量的第一个内部一致估计，并具有严格量化的不确定性。在0.92的水-堤坝质量比下，产生的总流体通量为8.0±2.1×10〜（12）kgyr〜（-1），足以将片状堤防复合体从岩浆温度降至热液温度，并去除〜50％的深部复合物结晶的潜热。对于保守元素而言，通量代表向海洋的输入，应允许开发出更精确的现代和古海水化学控制模型。

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