Organic facies variations in the Mesozoic South Atlantic DSDP Holes
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
1984
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| _version_ | 1867167669968437248 |
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| author | Gilbert, Deborah |
| author_facet | Gilbert, Deborah |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Visual kerogen and total organic carbon determinations indicate that there are two periods of organic enrichment events in the Mesozoic sediments of the South Atlantic. The first period, from the Late Jurassic through the late Aptian, is recorded in sediments from the Falkland Plateau, the Cape Basin, and the Angola Basin. Apparently, salinity stratification in the restricted basin, coupled with rising sea level, led to bottom water anoxia and organic enrichment. The second event, from the late Albian to the Santonian period, is recorded in sediments from the Angola Basin and the Sao Paulo Plateau. It appears to have been caused by development of an anoxic oxygen minimum zone at midwater depths. Organic matter sedimentation in the Mesozoic South Atlantic is controlled by geologic, climatic, eustatic, and Oceanographic factors. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_810223 |
| institution | PANGAEA |
| language | en |
| publishDate | 1984 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Organic facies variations in the Mesozoic South Atlantic DSDP Holes Gilbert, Deborah 36-327; 36-330; 39-356; 39-357; 40-361; 40-363; 40-364; 71-511; 75-530A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg36; Leg39; Leg40; Leg71; Leg75; South Atlantic/CONT RISE; South Atlantic/PLATEAU; South Atlantic/RIDGE; South Atlantic/SYNCLINE; South Atlantic Ocean Visual kerogen and total organic carbon determinations indicate that there are two periods of organic enrichment events in the Mesozoic sediments of the South Atlantic. The first period, from the Late Jurassic through the late Aptian, is recorded in sediments from the Falkland Plateau, the Cape Basin, and the Angola Basin. Apparently, salinity stratification in the restricted basin, coupled with rising sea level, led to bottom water anoxia and organic enrichment. The second event, from the late Albian to the Santonian period, is recorded in sediments from the Angola Basin and the Sao Paulo Plateau. It appears to have been caused by development of an anoxic oxygen minimum zone at midwater depths. Organic matter sedimentation in the Mesozoic South Atlantic is controlled by geologic, climatic, eustatic, and Oceanographic factors. |
| title | Organic facies variations in the Mesozoic South Atlantic DSDP Holes |
| topic | 36-327; 36-330; 39-356; 39-357; 40-361; 40-363; 40-364; 71-511; 75-530A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg36; Leg39; Leg40; Leg71; Leg75; South Atlantic/CONT RISE; South Atlantic/PLATEAU; South Atlantic/RIDGE; South Atlantic/SYNCLINE; South Atlantic Ocean |
| url | https://doi.org/10.1594/PANGAEA.810223 |