Hydrothermal Alteration of Basalt by Seawater and Formation of Secondary Minerals – An Electron Microprobe Study
Hydrothermal Alteration of Basalt by Seawater and Formation of Secondary Minerals – An Electron Microprobe Study
复制标题
海水对玄武岩的热液蚀变和次生矿物的形成——电子显微探针研究
DOI:
10.1007/978-3-642-20018-2_7
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Garbe-Schönberg C-D
中科院分区:
文献类型:
--
作者:
Kusebauch Ch;Holzheid A;Garbe-Schönberg C-D
Submarine hydrothermalism with extensive alteration of oceanic crust is a major process governing energy and mass fluxes from Earth’s interior into the oceans. New estimates suggest that about 50% of hydrothermal crust alteration occurs along slow and ultra-slow spreading ridges in the deep sea (German et al. 2009). Hydrothermal systems in water depths >3,000m can run at extreme temperatures under pressure (p) and temperature (T) conditions above the critical two-phase curve of seawater if enough heat from magma injections is provided. Exactly this type of submarine hydrothermalism has recently been discovered (Koschinsky et al. 2008): a high-pressure system in 3,000m water depth at 5°S on the Mid Atlantic Ridge (MAR) characterized by extreme temperatures (>400°C) and high to very high concentrations of dissolved hydrogen, methane, transition metals (e.g., Cu, Fe), and unique rare earth element chemistry with LREE and HREE depletion and no Eu-anomaly (Schmidt et al. 2010). All processes during phase separation, ascent, and final venting of the hydrothermal fluids at the seafloor run entirely under p-T-conditions within the vapour-liquid two phase field above the critical seawater curve. New results from 2-D, three-phase models indicate that these high-pressure systems run very stable for long time periods and without the compositional fluctuations known from the East Pacific Rise (EPR) in ~2,500m water depth (Coumou et al. 2008, 2009).
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DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
A. Hajash
通讯作者:
A. Hajash
影响因子:
5.8
作者:
Koschinsky, Andrea;Garbe-Schoenberg, Dieter;Strauss, Harald
通讯作者:
Strauss, Harald
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
D. Coumou;T. Driesner;C. Heinrich
通讯作者:
C. Heinrich
DOI:
--
发表时间:
1982
期刊:
影响因子:
--
作者:
A. Hajash;G. W. Chandler
通讯作者:
G. W. Chandler
影响因子:
5
作者:
MOTTL, MJ;HOLLAND, HD
通讯作者:
HOLLAND, HD