Sulfur isotope composition of pore fluids at ODP Sites 128-798 and 128-799
Fuente:
PANGAEA
Enregistré dans:
| Auteurs principaux: | , , , |
|---|---|
| Format: | Dataset Open Access |
| Langue: | en |
| Publié: |
PANGAEA
1996
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1867169497508478976 |
|---|---|
| author | Torres, Marta E Brumsack, Hans-Jürgen Bohrmann, Gerhard Emeis, Kay-Christian |
| author_facet | Torres, Marta E Brumsack, Hans-Jürgen Bohrmann, Gerhard Emeis, Kay-Christian |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Micro-crystalline barites recovered by deep-sea drilling from Site 684 on the Peru margin and Site 799 in the Japan Sea are highly enriched in the heavy sulfur isotope relative to seawater ( d34S up to +84‰). This isotopic composition is consistent with remobilization of biogenic barite triggered by sulfate reduction, and subsequent reprecipitation as a diagenetic barite front. The high levels of barium sulfate in these deposits (10-50%) cannot be explained by a diffusive transport model in sediments experiencing a constant rate of sedimentation. When sedimentation rates change radically, the barite front will remain at a given depth interval leading to large accumulations of barium sulfate. Such conditions may have generated the barite deposits at Site 799. At Site 684, on the other hand, there is evidence that the barite deposits are a result of the tectonically-driven advection of sulfate-bearing fluids through the sediment column. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_704809 |
| institution | PANGAEA |
| language | en |
| publishDate | 1996 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Sulfur isotope composition of pore fluids at ODP Sites 128-798 and 128-799 Torres, Marta E Brumsack, Hans-Jürgen Bohrmann, Gerhard Emeis, Kay-Christian 128-798; 128-799; COMPCORE; Composite Core; Japan Sea; Joides Resolution; Leg128; Ocean Drilling Program; ODP Micro-crystalline barites recovered by deep-sea drilling from Site 684 on the Peru margin and Site 799 in the Japan Sea are highly enriched in the heavy sulfur isotope relative to seawater ( d34S up to +84‰). This isotopic composition is consistent with remobilization of biogenic barite triggered by sulfate reduction, and subsequent reprecipitation as a diagenetic barite front. The high levels of barium sulfate in these deposits (10-50%) cannot be explained by a diffusive transport model in sediments experiencing a constant rate of sedimentation. When sedimentation rates change radically, the barite front will remain at a given depth interval leading to large accumulations of barium sulfate. Such conditions may have generated the barite deposits at Site 799. At Site 684, on the other hand, there is evidence that the barite deposits are a result of the tectonically-driven advection of sulfate-bearing fluids through the sediment column. |
| title | Sulfur isotope composition of pore fluids at ODP Sites 128-798 and 128-799 |
| topic | 128-798; 128-799; COMPCORE; Composite Core; Japan Sea; Joides Resolution; Leg128; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.704809 |