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Geochemical characteristics of granites associated with Proterozoic molybdenite mineralization in northern Sweden
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
1985 (English)In: Chemical Geology, ISSN 0009-2541, E-ISSN 1872-6836, Vol. 51, no 3-4, p. 247-263Article in journal (Refereed) Published
Abstract [en]

Proterozoic molybdenite occurrences in northern Sweden are associated with small plutons of intrusive character located in supracrustal belts whereas large granite areas are barren. In this study, 152 samples of granites associated with molybdenite mineralization, mineralized aplites, granites not known to be associated with molybdenite occurrences but located in supracrustal belts and granites from the large granite areas have been analysed for major elements and the selected trace elements Mo, Sn, Be, Ba, Rb, Sr, Cu, Zn, Zr, V, Y, Nb, F, Cl and S. The study showed that major-element geochemistry and modal composition are not useful for distinguishing between potentially molybdenite-mineralizing and barren granites in northern Sweden. Enriched contents of Sn, Be, Y, Rb and F are most useful for identifying ore-associated granites in the supracrustal belts. The granites from the large granite areas have very low contents of Sn, Mo, Be, Nb, Y, F, Cl and S. It is proposed that the granites associated with molybdenite occurrences were probably generated by partial melting of earlier igneous rocks, or they may be of subcrustal origin, the large granite bodies originated by partial melting of Archean continental crust.

Place, publisher, year, edition, pages
1985. Vol. 51, no 3-4, p. 247-263
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-8079DOI: 10.1016/0009-2541(85)90136-6ISI: A1985AVL6400008Scopus ID: 2-s2.0-0022167875Local ID: 684c2920-e548-11dc-bcb4-000ea68e967bOAI: oai:DiVA.org:ltu-8079DiVA, id: diva2:980969
Note
Godkänd; 1985; 20080227 (ysko)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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