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

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

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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 (
Keywords: Zn-Pb mineralisation; cambrian; rifting; fluid inclusions; ages; isotopic tracers Zn-Pb mineralisation; cambrian; rifting; fluid inclusions; ages; isotopic tracers
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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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