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Sphalerite geobarometry and arsenopyrite geothermometry applied to metamorphosed sulfide ores in the Swedish Caledonides
Geological Survey of Sweden.
Geological Survey of Sweden.
Institute of Geology, University of Uppsala.
Luleå tekniska universitet.
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1984 (English)In: Economic geology and the bulletin of the Society of Economic Geologists, ISSN 0361-0128, E-ISSN 1554-0774, Vol. 79, no 7, p. 1660-1668Article in journal (Refereed) Published
Abstract [en]

Metamorphosed massive sulfide deposits in the Swedish Caledonides were investigated using sphalerite geobarometry and arsenopyrite geothermometry. The sphalerite investigations yield pressure estimates of 3 to 5 kb for six deposits from host rocks of greenschist-lower amphibolite facies. A bimodal FeS distribution is apparent for the chlorite-grade deposits whereas the FeS distribution in biotite-grade deposits is unimodal. The arsenopyrite geothermometry is apparently sensitive to high contents (>0.2 wt %) of either of the trace elements Co and Ni, and possibly also of Sb. Temperature estimates for six deposits from the chlorite zone of greenschist facies yield 371 degrees + or - 45 degrees C, whereas one deposit from the biotite zone gives a temperature of 422 degrees + or - 25 degrees C. The pressure and temperature data obtained for the deposits correspond excellently with the metamorphic grade of the host rocks. Thus, sphalerite geobarometry and arsenopyrite geothermometry can be applied successfully to metamorphosed sulfide orebodies if attention is paid to textural relationships and minor element distribution in the minerals investigated

Place, publisher, year, edition, pages
1984. Vol. 79, no 7, p. 1660-1668
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-6526Local ID: 4c03ab60-cecd-11de-b769-000ea68e967bOAI: oai:DiVA.org:ltu-6526DiVA, id: diva2:979412
Note
Godkänd; 1984; 20091111 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-21Bibliographically approved

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