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.
Suggested Citation
Simoneit, B.R., Peters, K.E., Rohrback, B.G., Brenner, S., Kaplan, I., 2004, Thermal alteration of Cretaceous black shale from the Eastern Atlantic. III: Laboratory simulations, chap. of Geochemical investigations in earth and space science: A tribute to Isaac R. Kaplan, v. 9, p. 321-340, https://doi.org/10.1016/S1873-9881(04)80023-3.
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 |