Thermal alteration of Cretaceous black shale from the Eastern Atlantic. III: Laboratory simulations
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Abstract
Laboratory thermal alteration (pyrolysis) experiments were carried out on composited Cretaceous black shale samples from DSDP Hole 368. Dried rock samples (low water-rock ratio) were heated in an inert atmosphere in the range of 250–500°C and the resultant bitumen and kerogen concentrates were characterized. Pyrobitumen forms initially (250°C), then major hydrocarbon generation occurs from 300–360°C and oxygenated products (e.g. alkanoic acids) have a maximum yield at 330–360°C with minor generation to 500°C. Dealkylation of the aromatic hydrocarbons to the parent polynuclear aromatic hydrocarbons occurs above 400°C. The kerogens become more aromatic with increasing pyrolysis temperature (atomic H/C decreases from 1.2 to 0.5 and vitrinite reflectance increases to 3%). The temperature ranges of pyrobitumen, bitumen, and PAH formation in dry pyrolysis experiments are of utility in correlating with field data on ore genesis.
Study Area
| Publication type | Book chapter |
|---|---|
| Publication Subtype | Book Chapter |
| Title | Thermal alteration of Cretaceous black shale from the Eastern Atlantic. III: Laboratory simulations |
| DOI | 10.1016/S1873-9881(04)80023-3 |
| Volume | 9 |
| Year Published | 2004 |
| Language | English |
| Publisher | Elsevier |
| Description | 20 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Monograph |
| Larger Work Title | Geochemical investigations in earth and space science: A tribute to Isaac R. Kaplan |
| First page | 321 |
| Last page | 340 |
| Country | Cape Verde, Mauritania, Senegal |
| Other Geospatial | Atlantic Ocean, Cape Verde Rise |
| Google Analytic Metrics | Metrics page |