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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
1986
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| Online Access: | https://doi.org/10.1594/PANGAEA.789695 |
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| _version_ | 1867169998253850624 |
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| author | Kastner, Miriam |
| author_facet | Kastner, Miriam |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Particles of red brown to yellow brown semiopaque oxides (RSO) dominate the insoluble residue fraction of the sediments at Site 597. Unlike the X-ray amorphous particles in the Bauer Deep sediments, these particles are composed of mainly goethite; the amount of X-ray amorphous ferric hydroxide and poorly crystalline ferromanganese oxyhydroxides is generally small relative to the amount of goethite. A qualitative goethite crystallinity index was established. The variations observed in the crystallinity of goethite with increasing depth and changes in lithology suggest that aging and long-term exposure to seawater in a high water/sediment regime influence and increase the rate of recrystallization of the Fe-oxyhydroxides of the RSO particles. The percentage of organic carbon is low in these sediments; it varies primarily between 0.2 and 0.4 wt.%. Phillipsite is present throughout the sediment column and is more concentrated in the youngest clay layer and in the oldest basal sediments. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_789695 |
| institution | PANGAEA |
| language | en |
| publishDate | 1986 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Calcium carbonate and <2 µm fractions of bulk sample and insoluble residue at DSDP Hole 92-597 Kastner, Miriam 92-597; Calcium carbonate; Deep Sea Drilling Project; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Leg92; Sample code/label; Selective dissolution in acetic acid Na acetate buffer solution; Size fraction < 0.002 mm, clay; South Pacific Ocean; UIC CO2-coulometer; X-ray diffraction (XRD) Particles of red brown to yellow brown semiopaque oxides (RSO) dominate the insoluble residue fraction of the sediments at Site 597. Unlike the X-ray amorphous particles in the Bauer Deep sediments, these particles are composed of mainly goethite; the amount of X-ray amorphous ferric hydroxide and poorly crystalline ferromanganese oxyhydroxides is generally small relative to the amount of goethite. A qualitative goethite crystallinity index was established. The variations observed in the crystallinity of goethite with increasing depth and changes in lithology suggest that aging and long-term exposure to seawater in a high water/sediment regime influence and increase the rate of recrystallization of the Fe-oxyhydroxides of the RSO particles. The percentage of organic carbon is low in these sediments; it varies primarily between 0.2 and 0.4 wt.%. Phillipsite is present throughout the sediment column and is more concentrated in the youngest clay layer and in the oldest basal sediments. |
| title | (Table 1) Calcium carbonate and <2 µm fractions of bulk sample and insoluble residue at DSDP Hole 92-597 |
| topic | 92-597; Calcium carbonate; Deep Sea Drilling Project; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Leg92; Sample code/label; Selective dissolution in acetic acid Na acetate buffer solution; Size fraction < 0.002 mm, clay; South Pacific Ocean; UIC CO2-coulometer; X-ray diffraction (XRD) |
| url | https://doi.org/10.1594/PANGAEA.789695 |