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U-Pb age of the Yxsjoberg tungsten-skarn deposit, Sweden
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
1994 (English)In: GFF, ISSN 1103-5897, E-ISSN 2000-0863, Vol. 116, no 3, p. 161-166Article in journal (Refereed) Published
Abstract [en]

The Yxsjoberg scheelite-skarn deposit of western Bergslagen (south-central Sweden) formed in Palaeoproterozoic time when aqueous fluids migrating along lithologic discontinuities replaced limestones in acid volcanic rocks. The age of the mineralization and, thus, the source of the fluids are controversial. U-Pb dating of titanite that formed during the skarnification of the limestones yields an age of 1789+ or -2 Ma. This age is not compatible with an exhalative origin of the deposit or a genetic relation to Svecofennian arc magmatism, as has been suggested. Instead, the U-Pb titanite age corresponds to the age of Y, Rb, F, and Nb-rich post-kinematic granitoids from the Bergslagen area and granitoids of the Transscandinavian Igneous Belt (TIB) farther to the west. As the TIB granitoids are not fertile with respect to W-mineralizations, the U-Pb titanite age indicates that the post-kinematic granitoids were the source of heat, metals, and probably fluids for the formation of the Yxsjoberg scheelite-skarn deposit

Place, publisher, year, edition, pages
1994. Vol. 116, no 3, p. 161-166
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-10583DOI: 10.1080/11035899409546179Scopus ID: 2-s2.0-0028563327Local ID: 967f1450-c798-11dd-941d-000ea68e967bOAI: oai:DiVA.org:ltu-10583DiVA, id: diva2:983528
Note

Godkänd; 1994; 20081211 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Öhlander, Björn

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