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Generation of compositionally atypical hydrocarbons in CO2-rich geologic environments.

Gize, Andrew and Macdonald, Ray (1993) Generation of compositionally atypical hydrocarbons in CO2-rich geologic environments. Geology, 21 (2). pp. 129-132.

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Abstract

Bitumen seepages from a trachyte flow on the Suswa volcano (East African Rift) are anomalously enriched in O and N heteroatomic organic compounds and depleted in aliphatics. Compositional and geologic data suggest that the biogenically derived bitumens were extracted and/or transported by liquid or supercritical CO2, rather than H2O, possibly from caldera-lake sediments. Compositionally atypical hydrocarbons and reduced carbon associated with other alkaline-peralkaline igneous complexes, as well as Hg and Au deposits, may also reflect CO2, fluids. Hydrocarbon extraction and migration in CO2-rich fluids are considered realistic mechanisms in certain geologic environments.

Item Type: Article
Journal or Publication Title: Geology
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: UNSPECIFIED
ID Code: 22615
Deposited By: ep_ss_importer
Deposited On: 22 Jan 2009 14:17
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:03
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/22615

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