Cl stable isotopes in subduction zones: Implications for the ocean Cl isotope cycle
Chlorine stable isotope ratios (δ37Cl) in pore fluids, serpentines, and solid samples from three subduction zones, the Nankai Trough (Ocean Drilling Program Legs 131 and 190), Costa Rica (ODP Legs 170 and 205), and Mariana Forearc (ODP Leg 195) provide critical information on fluid sources, flow paths, and reaction conditions at subduction zones. The δ37Cl values of pore fluids at the Nankai and Costa Rica subduction zones are significantly more negative (up to -7.8‰, 2σ± 0.3‰) than the seawater value (0‰). In contrast, the δ37Cl values in the pore fluids at the Mariana mud volcanoes range from +0.3‰ to+1.8‰, which, together with ridge crest hydrothermal fluids, having δ37Cl up to 4.1‰, constitute positive 37Cl fluxes into the ocean that compensate the negative δ37Cl fluid fluxes at subduction zones.
W.Wei M.Kastner A.Spivack
Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, USA Graduate School of Oceanography, University of Rhode Island, Narragansett, RI, USA
国际会议
第十二届水-岩相互作用国际研讨会(P0roceedings of the 12th International Symposium on Water-Rock Interaction)
昆明
英文
807-810
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）