This paper investigates the hyper-enrichments of molybdenum (Mo), uranium (U), and vanadium (V) in the lower Paleozoic, Alum Shale of Denmark, Sweden, Norway, and Estonia. Molybdenum and U are mainly associated with organic matter and the highest contents are found in the Furongian part of the Alum Shale. This Furongian hyper-enrichment of Mo and U commenced with the Steptoean Positive Carbon Isotope Excursion (SPICE) event. The temporal distribution of V content increases moderately from the Miaolingian to the Furongian, followed by a significant increase in the Early Ordovician. In addition, the vanadium content generally increases towards the offshore, distal part of the Alum Shale basin. The geochemical affinity of V seems to change from organic matter in the Cambrian to minerals in the Early Ordovician. The hyper-enrichment of V in the Lower Ordovician succession appears to result from upwelling of deep oceanic water. The spatial distribution of V in the Alum Shale indicates that the highest concentrations are located in Scania, southernmost Sweden.
Authors
- Dr Leibo Bian,
- Niels H. Schovsbo,
- Anthony Chappaz,
- Xiaowei Zheng,
- Arne Thorshøj Nielsen,
- Thomas Ulrich,
- Xibo Wang,
- Shifeng Dai,
- Jennifer M. Galloway,
- dr inż. Aleksandra Małachowska link open in new tab ,
- Xuhui Xu,
- Hamed Sanei
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1016/j.coal.2021.103730
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2021
