Fluid inclusion studies of the Drammen Granite, Oslo Paleorift, Norway - II. Gas- and leachate analyses of miarolytic quartz

K. I. Olsen*, W. L. Griffin

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The Drammen Granite is a subvolcanic complex, intruded during the Permian igneous activity in the Oslo Paleorift. Molybdenite deposits occur within the complex in large discrete quartz veins, accompanied by moderate alteration of the granite. Microchemical and Sr-isotopic studies of fluids trapped in quartz from miarolytic cavities allow characterization of fluids in the granite. The results compare well with compositions interpreted from microthermometry studies. The observed range in K/Na, Ca/Na and the calculated concentrations of metals in the original fluids suggest that different stages of development are represented. Some of the fluids probably represent early magmatic stages. K/Rb results and the average Sr-isotope composition indicate equilibrium between the fluids and the granite magma.

Original languageEnglish
Pages (from-to)15-23
Number of pages9
JournalContributions to Mineralogy and Petrology
Volume87
Issue number1
DOIs
Publication statusPublished - Aug 1984
Externally publishedYes

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