Lithology and organic geochemistry at DSDP Hole 77-535
Fuente:
PANGAEA
Gespeichert in:
| Hauptverfasser: | , , , |
|---|---|
| Format: | Dataset Open Access |
| Sprache: | en |
| Veröffentlicht: |
PANGAEA
1984
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1867171365327470592 |
|---|---|
| author | Palacas, James G King, J David Claypool, George E Magoon, Leslie B |
| author_facet | Palacas, James G King, J David Claypool, George E Magoon, Leslie B |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Analyses of extractable organic matter from selected core samples obtained at DSDP Site 535 in the eastern Gulf of Mexico show that the asphalt (or tar) and adjacent oil stains in Lower Cretaceous fractured limestones have a common origin and are not derived from the surrounding organic-matter-rich limestones. Organic matter indigenous to those surrounding limestones was shown to be thermally immature and incapable of yielding the hydrocarbon mixture discovered. In contrast, the oil-stained and asphaltic material appears to be a post-migration alteration product of a mature oil that has migrated from source rocks deeper in the section, or from stratigraphically equivalent but compositionally different source-facies down-dip from the drill site. Further, hydrocarbons of the altered petroleum residues were shown to be similar to Sunniland-type oils found in Lower Cretaceous rocks of South Florida. The results suggest that shallowwater, platform-type source-rock facies similar to those that generated Sunniland-type oils, or deeper-water facies having comparable oil-generating material, are present in this deep-water (> 3000 m) environment. These findings have important implications for the petroleum potential in the eastern Gulf of Mexico and for certain types of deep-sea sediments. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_809516 |
| institution | PANGAEA |
| language | en |
| publishDate | 1984 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Lithology and organic geochemistry at DSDP Hole 77-535 Palacas, James G King, J David Claypool, George E Magoon, Leslie B 77-535; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Gulf of Mexico/BASIN; Leg77 Analyses of extractable organic matter from selected core samples obtained at DSDP Site 535 in the eastern Gulf of Mexico show that the asphalt (or tar) and adjacent oil stains in Lower Cretaceous fractured limestones have a common origin and are not derived from the surrounding organic-matter-rich limestones. Organic matter indigenous to those surrounding limestones was shown to be thermally immature and incapable of yielding the hydrocarbon mixture discovered. In contrast, the oil-stained and asphaltic material appears to be a post-migration alteration product of a mature oil that has migrated from source rocks deeper in the section, or from stratigraphically equivalent but compositionally different source-facies down-dip from the drill site. Further, hydrocarbons of the altered petroleum residues were shown to be similar to Sunniland-type oils found in Lower Cretaceous rocks of South Florida. The results suggest that shallowwater, platform-type source-rock facies similar to those that generated Sunniland-type oils, or deeper-water facies having comparable oil-generating material, are present in this deep-water (> 3000 m) environment. These findings have important implications for the petroleum potential in the eastern Gulf of Mexico and for certain types of deep-sea sediments. |
| title | Lithology and organic geochemistry at DSDP Hole 77-535 |
| topic | 77-535; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Gulf of Mexico/BASIN; Leg77 |
| url | https://doi.org/10.1594/PANGAEA.809516 |