Selective copper diffusion into quartz-hosted vapor inclusions: Evidence from other host minerals, driving forces, and consequences for Cu-Au ore formation

Title
Selective copper diffusion into quartz-hosted vapor inclusions: Evidence from other host minerals, driving forces, and consequences for Cu-Au ore formation
Authors
서정훈
Issue Date
2013
Publisher
GEOCHIMICA ET COSMOCHIMICA ACTA
Series/Report no.
GEOCHIMICA ET COSMOCHIMICA ACTA; vol.113 startpage 60 endpage 69
Abstract
Recent experimental studies have raised concerns that Cu concentrations in quartz-hosted fluid inclusions from magmatic? hydrothermal ore deposits do not represent pristine concentrations in the trapped fluids, but are modified by postentrapment diffusional exchange through the host quartz. New microanalyses of fluid inclusions hosted in topaz show significantly lower Cu concentrations in vapor inclusions, compared to otherwise identical inclusions hosted by coexisting quartz, whereas coeval brine (hypersaline liquid) inclusions are very similar independent of host mineral in one sample. Sulfur is present as a major component in all vapor inclusions, as in most porphyry-related vapor inclusions, and Cu never exceeds S, but commonly matches the S content at a molar ratio of Cu:S 6 2 in vapor inclusions hosted by quartz. Univalent ions with a radius smaller than 1 A˚ are known to diffuse rapidly through the channels of the quartz structure, parallel to its crystallographic c axis. Since
URI
http://dx.doi.org/10.1016/j.gca.2013.03.016
http://dspace.inha.ac.kr/handle/10505/32868
ISSN
0016-7037
Appears in Collections:
College of Engineering(공과대학) > Energy Resource Engineering (에너지자원공학) > Journal Papers, Reports(에너지자원공학 논문, 보고서)
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