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| Main Authors: | , , , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
1994
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.707989 |
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| _version_ | 1867172311587618816 |
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| author | You, Chen-Feng Morris, J D Gieskes, Joris M Rosenbauer, Robert J Zheng, S H Xu, X Ku, Teh-Lung Bischoff, James L |
| author_facet | You, Chen-Feng Morris, J D Gieskes, Joris M Rosenbauer, Robert J Zheng, S H Xu, X Ku, Teh-Lung Bischoff, James L |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Studies of Be distributions in subduction zone sediments will help to understand questions regarding the enrichments of cosmogenic Be-10 in arc volcanic rocks. Analyses of Be-10 and Be-9 in sediments of Ocean Drilling Program Site 808, Nankai Trough and Be-9 in porewaters of Site 808 and Sites 671 and 672, Barbados ridge complex, show significant decreases in solid phase Be-10 and large increases of porewater Be-9 at the location of the décollement zone and below or at potential flow conduits. These data imply the potential mobilization of Be during pore fluid expulsion upon sediment burial. Experiments involving reaction between a décollement sediment and a synthetic NaCl-CaCl2 solution at elevated pressure and temperatures were conducted in an attempt to mimic early subduction zone processes. The results demonstrate that Be is mobilized under elevated pressure and temperature with a strong pH dependence. The Be mobilization provides an explanation of Be-10 enrichment in arc volcanic rocks and supports the argument of the importance of the fluid processes in subduction zones at convergent margins. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_707989 |
| institution | PANGAEA |
| language | en |
| publishDate | 1994 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Chemical compositions of beryllium in sediments and pore waters of ODP Hole 131-808 You, Chen-Feng Morris, J D Gieskes, Joris M Rosenbauer, Robert J Zheng, S H Xu, X Ku, Teh-Lung Bischoff, James L 131-808; Accelerator mass spectrometry (AMS); Age model; Beryllium-10; Beryllium-9; Calculated; Coefficient; COMPCORE; Composite Core; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; EIectron capture detection gas chromatography (ECD-GC); Elevation of event; Joides Resolution; Latitude of event; Leg131; Longitude of event; Ocean Drilling Program; ODP; Philippine Sea; Sample code/label Studies of Be distributions in subduction zone sediments will help to understand questions regarding the enrichments of cosmogenic Be-10 in arc volcanic rocks. Analyses of Be-10 and Be-9 in sediments of Ocean Drilling Program Site 808, Nankai Trough and Be-9 in porewaters of Site 808 and Sites 671 and 672, Barbados ridge complex, show significant decreases in solid phase Be-10 and large increases of porewater Be-9 at the location of the décollement zone and below or at potential flow conduits. These data imply the potential mobilization of Be during pore fluid expulsion upon sediment burial. Experiments involving reaction between a décollement sediment and a synthetic NaCl-CaCl2 solution at elevated pressure and temperatures were conducted in an attempt to mimic early subduction zone processes. The results demonstrate that Be is mobilized under elevated pressure and temperature with a strong pH dependence. The Be mobilization provides an explanation of Be-10 enrichment in arc volcanic rocks and supports the argument of the importance of the fluid processes in subduction zones at convergent margins. |
| title | (Table 1) Chemical compositions of beryllium in sediments and pore waters of ODP Hole 131-808 |
| topic | 131-808; Accelerator mass spectrometry (AMS); Age model; Beryllium-10; Beryllium-9; Calculated; Coefficient; COMPCORE; Composite Core; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; EIectron capture detection gas chromatography (ECD-GC); Elevation of event; Joides Resolution; Latitude of event; Leg131; Longitude of event; Ocean Drilling Program; ODP; Philippine Sea; Sample code/label |
| url | https://doi.org/10.1594/PANGAEA.707989 |