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Characteristics and Enrichment Genesis of the Platinum Group Elements (PGEs) in Organic Rich Shale of the Wufeng and Longmaxi Formations of Upper Ordovician and Lower Silurian in the Sichuan Basin.
- Source :
- Minerals (2075-163X); Nov2022, Vol. 12 Issue 11, p1363, 23p
- Publication Year :
- 2022
-
Abstract
- The petrology, mineralogy, elemental geochemistry, biology and PGEs characteristics of the black shale of the Wufeng and Longmaxi Formations in the CN outcrop of the Sichuan Basin are studied in this paper. The distribution and change in PGEs at different horizons are summarized, and the reasons for PGEs enrichment are discussed. The results show that the PGEs in the organic-rich shale segment are obviously enriched, which is positively correlated with the Total Organic Carbon (TOC) content and has a Pt–Pd distribution characteristic. δEu<subscript>N</subscript>, Pd/Pt, (Pt + Pd)/(Os + Ru + Ir), etc., and SiO<subscript>2</subscript>–Al<subscript>2</subscript>O<subscript>3</subscript> and It/Pt–Pd/Pt discrimination diagrams, indicate that they are not extraterrestrial sources, nor are they the origins of normal seawater deposition but they are related to hydrothermal deposition. The enrichment process of PGEs is relatively complicated and is controlled by the impact of the sedimentary environment in the restricted basin. The anoxic water environment and organic-rich environment are the main factors of PGEs enrichment. PGEs and TOC have a good positive correlation and can be used as index parameters for sedimentary environments and organic matter enrichment. [ABSTRACT FROM AUTHOR]
- Subjects :
- PLATINUM group
BLACK shales
ANOXIC waters
SHALE
GEOCHEMISTRY
PETROLOGY
Subjects
Details
- Language :
- English
- ISSN :
- 2075163X
- Volume :
- 12
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Minerals (2075-163X)
- Publication Type :
- Academic Journal
- Accession number :
- 160206905
- Full Text :
- https://doi.org/10.3390/min12111363