Hydrocarbon-bearing fluid inclusions in the Drau Range (Eastern Alps, Austria): implications for the genesis of Bleiberg-type Pb-Zn deposits

Authors
Rantitsch, G Jochum, J Sachsenhofer, RF Russegger, B Schroll, E Horsfield, B
Citation
G. Rantitsch et al., Hydrocarbon-bearing fluid inclusions in the Drau Range (Eastern Alps, Austria): implications for the genesis of Bleiberg-type Pb-Zn deposits, MINER PETR, 65(3-4), 1999, pp. 141-159
Citations number
65
Categorie Soggetti
Earth Sciences
Journal title
MINERALOGY AND PETROLOGY
ISSN journal
09300708 → ACNP
Volume
65
Issue
3-4
Year of publication
1999
Pages
141 - 159
Database
ISI
SICI code
0930-0708(1999)65:3-4<141:HFIITD>2.0.ZU;2-9
Abstract
Hydrocarbons in ore minerals of Bleiberg-type Pb-Zn deposits and in authige nic quartz of the Drau Range (Eastern Alps) have been analysed by bulk-samp le gas chromatography and fluorescence microscopy. Microthermometric data a nd the molecular composition of the hydrocarbons indicate a hot (120 degree s to 130 degrees C) pulse of migrating condensate-like hydrocarbons within Late Triassic sediments during Middle Cretaceous to Early Tertiary times. T he molecular composition of hydrocarbons enclosed in authigenic quartz corr esponds to the composition of hydrocarbons trapped in Bleiberg-type ore min erals, therefore a common fluid source is assumed. The hydrocarbons possibl y played an important role as reducing agents in the late stage of sulfide precipitation.