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Rare earth elements (REEs) geochemistry of Sinian-Cambrian reservoir solid bitumens in Sichuan Basin, SW China: potential application to petroleum exploration.
- Source :
-
Geological Journal . Mar/Apr2017, Vol. 52 Issue 2, p298-316. 19p. - Publication Year :
- 2017
-
Abstract
- In order to evaluate rare earth elements (REEs) as a potential proxy for solid bitumen classification, we employed traditional correlation approaches, such as carbon isotopes and V/(V + Ni) ratios, to infer the source rocks of Sinian-Cambrian reservoir solid bitumens in the Sichuan Basin and analyse solid bitumens for their REE compositions by inductively coupled plasma-mass spectrometry. Our data suggested that Sinian-Cambrian reservoir solid bitumens were primarily sourced from the lower Cambrian shales deposited under anoxic-euxinic conditions. REE and their associated parameters seemed to be more sensitive to classify solid bitumens than traditional correlation approaches. REE concentrations played a dominant role and fractionation degree between light and heavy REE and played a secondary role in solid bitumen classification. REE concentration and pattern in solid bitumens might be controlled by two processes, including inheritance from source rocks and water-rock interaction. The major factor controlling REE concentrations in solid bitumens was the type of organic matter of source rocks. Authigenic minerals in solid bitumens formed by water-rock interaction appeared to have little influence on REE compositions of solid bitumens because of their trace contents. Overall, REE could be used as a novel complementary approach to solid bitumen classification in complicated petroleum systems. Copyright © 2015 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
- Subjects :
- *RARE earth metals
*GEOCHEMISTRY
*RESERVOIRS
*PETROLEUM prospecting
Subjects
Details
- Language :
- English
- ISSN :
- 00721050
- Volume :
- 52
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Geological Journal
- Publication Type :
- Academic Journal
- Accession number :
- 121776221
- Full Text :
- https://doi.org/10.1002/gj.2757