Petrography of thoriferous hydrocarbon nodules in sandstones, and their significance for petroleum exploration

Autor:	B. Monson, John Parnell, R. J. Tosswill
Rok vydání:	1990
Předmět:	Nodule (geology) chemistry.chemical_classification Mineral Heavy mineral Mineralogy Geology engineering.material Thorite Petrography Hydrocarbon chemistry Monazite engineering Energy source
Zdroj:	Journal of the Geological Society. 147:837-842
ISSN:	2041-479X 0016-7649
DOI:	10.1144/gsjgs.147.5.0837
Popis:	Nodules of thorium-rich hydrocarbon are recorded in sandstone sequences from several basins. The hydrocarbon nodules contain mineral inclusions, particularly of thorite or monazite. There is evidence both for accretion of hydrocarbons around detrital heavy mineral grains and for epigenetic growth by interaction of hydrocarbons with thorium-bearing fluids. Both mechanisms depend upon the precipitation of solid hydrocarbons induced by irradiation from thorium. The nodules exhibit aggressive replacement of other grains, a characteristic of radioanomalous hydrocarbons. The occurrence of the nodules is dependent upon an appropriate (plutonic) source for the thorium, but given this constraint they are important evidence for hydrocarbon migration pathways.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::741c7c19370f45f324a861c3f10aec5f https://doi.org/10.1144/gsjgs.147.5.0837 Zobrazit plný text záznamu