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Minerals 2012, 2(3), 169-207; doi:10.3390/min2030169

Zn-Pb Ores of Mississippi Valley Type in the Lycksele-Storuman District, Northern Sweden: A Possible Rift-Related Cambrian Mineralisation Event

1
Laboratory for Isotope Geology, Swedish Museum of Natural History, Stockholm SE-10405, Sweden
2
Department of Geological Sciences, Stockholm University, Stockholm SE-10691, Sweden
3
Freiberg School of Mines, Freiberg 09596, Germany
4
Specialized Geological Mapping Ltd., Catlin Cottage, Station Rd, Urquhart Moray, Elgin IV30 8LQ, UK
5
Björka Mineral AB, Björkaverken, Glanshammar SE-705 97, Sweden
*
Author to whom correspondence should be addressed.
Received: 30 March 2012 / Revised: 7 June 2012 / Accepted: 20 June 2012 / Published: 29 June 2012
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Abstract

The epigenetic Zn-Pb deposits in the Lycksele-Storuman ore district, northern Sweden, are hosted by Paleoproterozoic basement near the margin of the Caledonian mountains. A paleogeographic reconstruction suggests that platform sediments, including Cambrian shales, overlaid the mineralised basement. The mineralisation type, containing sphalerite, galena, calcite and fluorite, is confined to veins and breccias and interpreted to be of Mississippi Valley Type (MVT) style. There is no appreciable wall rock alteration. Fluid inclusion work reveals coexisting aqueous and hydrocarbon fluids. Ore deposition is interpreted to have occurred during mixing of two fluids; a cool ( View Full-Text
Keywords: Zn-Pb mineralisation; cambrian; rifting; fluid inclusions; ages; isotopic tracers Zn-Pb mineralisation; cambrian; rifting; fluid inclusions; ages; isotopic tracers
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Billström, K.; Broman, C.; Schneider, J.; Pratt, W.; Skogsmo, G. Zn-Pb Ores of Mississippi Valley Type in the Lycksele-Storuman District, Northern Sweden: A Possible Rift-Related Cambrian Mineralisation Event. Minerals 2012, 2, 169-207.

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