Lithium, boron, and their isotopes in sediments and pore waters of Ocean Drilling Program Site 808, Nankai Trough: Implications for fluid expulsion in accretionary prisms

Abstract

Research Article| January 01, 1995 Lithium, boron, and their isotopes in sediments and pore waters of Ocean Drilling Program Site 808, Nankai Trough: Implications for fluid expulsion in accretionary prisms C.-F. You; C.-F. You 1Department of Geology and Geophysics, Louisiana State University, Baton Rouge, Louisiana 70803-4101 Search for other works by this author on: GSW Google Scholar L. H. Chan; L. H. Chan 2Scripps Institution of Oceanography, La Jolla, California 92093-0215 Search for other works by this author on: GSW Google Scholar A. J. Spivack; A. J. Spivack 1Department of Geology and Geophysics, Louisiana State University, Baton Rouge, Louisiana 70803-4101 Search for other works by this author on: GSW Google Scholar J. M. Gieskes J. M. Gieskes 1Department of Geology and Geophysics, Louisiana State University, Baton Rouge, Louisiana 70803-4101 Search for other works by this author on: GSW Google Scholar Geology (1995) 23 (1): 37–40. https://doi.org/10.1130/0091-7613(1995)023<0037:LBATII>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation C.-F. You, L. H. Chan, A. J. Spivack, J. M. Gieskes; Lithium, boron, and their isotopes in sediments and pore waters of Ocean Drilling Program Site 808, Nankai Trough: Implications for fluid expulsion in accretionary prisms. Geology 1995;; 23 (1): 37–40. doi: https://doi.org/10.1130/0091-7613(1995)023<0037:LBATII>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Results from a comprehensive study of B, δ11B, Li, and δ6Li distributions in both sediment and pore-water samples of Ocean Drilling Program Site 808, Nankai Trough, Japan, show a strong correlation between Li and B concentrations, in agreement with previously published information from surface-marine sediments, suggesting similar geochemical behavior in sedimentary environments. The δ6Li and δ11B analyses provide additional data on the systematics of Li and B in marine sediments. Our results provide information on fluid-expulsion activity that has occurred at this drill site. Anomalies in all these constituents in the vicinity of the decollement zone (∼960 m below sea floor [m bsf]) suggest an influx of deeply generated fluids having distinct chemical compositions. The maximum concentrations of B and Li in bulk sediment, as well as their corresponding isotopic compositions, suggest uptake of both elements via chemisorption or secondary-mineral formation near the fluid conduit associated with the decollement zone. The low δ11B in pore waters suggests contribution of exchangeable plus lattice-bound B from greater depths. The corresponding high δ6Li similarly indicates mobilization from sediment under high-temperature conditions. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.