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Caledonian upgrading of Proterozoic low-grade base-metal deposits in northern Sweden
Luleå tekniska universitet.
1994 (English)In: Mineralogy and Petrology, ISSN 0930-0708, E-ISSN 1438-1168, Vol. 50, no 4, p. 271-285Article in journal (Refereed) Published
Abstract [en]

Proterozoic sulfide deposits within the basement of northern Sweden have lead isotopic compositions that fall on a mixing line in the206Pb/204Pb-207Pb/204Pb diagram. These deposits contain a highly radiogenic Phanerozoic lead component that was leached from the Proterozoic basement at around 0.4 Ga during the Caledonian orogeny. Within the Proterozoic deposits, the less radiogenic lead isotopic compositions occur in undeformed and little deformed sections, while the more radiogenic lead isotopic compositions are observed along fault, fracture, and shear zones. These zones with radiogenic Phanerozoic lead also have higher contents of lead, zinc, and gold, respectively, than the other parts of the deposits, which suggests that these metals were introduced together with the radiogenic lead at a much later event than the metals in the unaltered Proterozoic deposit. The Proterozoic deposits acted as traps for metal additions along Caledonian reactivated fault and shear zones in the Proterozoic basement.

Place, publisher, year, edition, pages
1994. Vol. 50, no 4, p. 271-285
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-6541DOI: 10.1007/BF01164610ISI: A1994NF13400006Scopus ID: 2-s2.0-0042280838Local ID: 4c52f000-cb57-11dd-9935-000ea68e967bOAI: oai:DiVA.org:ltu-6541DiVA, id: diva2:979427
Note

Godkänd; 1994; 20081216 (andbra)

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

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