Journal
JOURNAL OF GEOCHEMICAL EXPLORATION
Volume 148, Issue -, Pages 169-173Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.gexplo.2014.09.006
Keywords
Selenium; Tellurium; Biodegradation; Oil reservoirs; Microbial sulfate reduction
Categories
Funding
- NERC Security of Supply programme [NE/L001764/1]
- NERC [NE/L001764/1, NE/M010848/1] Funding Source: UKRI
- Natural Environment Research Council [NE/L001764/1, NE/M010848/1] Funding Source: researchfish
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The exploration for selenium (Se) and tellurium (Te) will become intensified as the technological demand for these elements grows. It is known that they are enriched in organic-rich sedimentary rocks over crustal mean values. LA-ICP-MS measurement of pyrite in two biodegraded palaeo-oil reservoirs in central England shows that Se and Te are enriched in them, but not in other sulfide samples from the region and elsewhere. The Carboniferous source rock shales in the region are Se-rich, implying that this enrichment was conferred to the oil generated from them. The Se and Te are located in pyrite precipitated in the palaeo-reservoirs by microbial activity. Exhumed oil reservoirs merit further investigation for concentrations of these elements. (C) 2014 Elsevier B.V. All rights reserved.
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