Fluid-rock interaction in the Mo-bearing Nebelstein Greisen Complex, Bohemian Massif (Austria)

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Authors:Koller, F.; Hogelsberger, H.; Koeberl, C.
Author Affiliations:Primary:
University of Vienna, Institute of Petrology, Vienna, Austria
Volume Title:Metamorphic fluids and minerals deposits; proceedings of the IGCP 291 Project symposium
Volume Authors:Stumpfl, E. F., editor
Source:Mineralogy and Petrology, 45(3-4), p.261-276; Metamorphic fluids and minerals deposits; IGCP 291 Project symposium, Zurich, Switzerland, March, 1991, edited by E. F. Stumpfl. Publisher: Springer-Verlag, Vienna, Austria. ISSN: 0930-0708
Publication Date:1992
Note:In English with German summary. 32 refs.; illus., incl. 3 tables, geol. sketch map
Summary:In this area molybdenite-bearing greisens occur with peraluminous leucogranites. The progressive alteration of granites to greisens is reflected by lower homogenization T and increasing salinity in aqueous fluid inclusions. Prior to greisenization the fluid regime was water-dominated with low salt contents, while the early greisen development stage was characterized by a mixed fluid containing CO2 and water. This was followed by a moderately saline aqueous fluid which caused the mineralization by exchange of metal ions for Na+ (Ca2+, K+). A minimum fluid-rock ratio of approx 2:1 is suggested and it seems that greisenization occurred at a minimum P of 180 MPa and at T of 200- < 400 degrees C. [R.E.S.]
Subjects:Alteration; Chemical composition; Chemical reactions; Granites; Greisen; Greisenization; IGCP; Igneous rocks; Mass balance; Metal ores; Metamorphic rocks; Metasomatic rocks; Metasomatism; Mineral deposits, genesis; Molybdenum ores; Ore-forming fluids; P-T conditions; Plutonic rocks; Salinity; Temperature; Water-rock interaction; Austria; Bohemian Massif; Central Europe; Europe; Nebelstein Austria; Nebelstein Greisen Complex
Coordinates:N484000 N490000 E0154000 E0150000
Abstract Numbers:93M/834
Record ID:1995009978
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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