Fluid inclusion gas analysis of hydrothermal vein molybdenum deposits associated with the Drammen granite in the Permian Oslo Rift, Norway

Composition and evolution of crustal, geothermal and hydrothermal fluids interpreted using quantitative fluid inclusion gas analysis

“…One issue of the Journal of Geochemical Exploration was dedicated to fluid inclusion gases, their techniques, and exploration case histories (Bray et al, 1991;Burlinson, 1991;Graney et al, 1991;Landis and Hofstra, 1991;Moon, 1991;Norman et al, 1991;Shepherd et al, 1991;Takenouchi, 1991;Walder et al, 1991;Wilkins and Jenatton, 1991). However, it became apparent that bulk analytical methods could not avoid potential contamination from multiple fluid inclusion populations.…”

The Spar Lake Strata-Bound Cu-Ag Deposit Formed Across a Mixing Zone Between Trapped Natural Gas and Metals-Bearing Brine

“…Sample 31-666.4, from just outside and below the southwestern fringe of the Upper East orebody, had high concentrations (18 to >36%) of CH 4 and yielded less than 50 mol % H 2 O (nonaqueous fluid) in all three runs. In fluid inclusion gas analyses of metals deposits (Norman and Sawkins, 1985;Norman et al, , 1991Landis and Hofstra, 1991;Walder et al, 1991;Boer et al, 1995;Mavrogenes et al, 1995;Sherlock et al, 1995;Landis and Rye, 2005;Camprubi et al, 2006), only samples from orogenic gold deposits hosted in lower greenschist facies host rocks and from pre-ore paragenetic stages from Jerritt Canyon have had CH 4 concentrations greater than 10 mol %. In Figure 6, H 2 O-CO 2 -CH 4 proportions of fluid inclusion volatiles from most of the methane-rich fluid inclusions from ore deposits studied to date by quadrupole mass spectrometry are plotted for comparison with the new results from Spar Lake.…”