무안 지역, 삼보 광상의 금광화작용Hydrothermal Gold Mineralization of the Sambo Deposit in the Muan Area, Korea
- Other Titles
- Hydrothermal Gold Mineralization of the Sambo Deposit in the Muan Area, Korea
- Authors
- 박상준; 최선규
- Issue Date
- 2008
- Publisher
- 대한자원환경지질학회
- Keywords
- 삼보광상; 금광화작용; 광화 유체; 적철석; 천열수; Sambo deposit; gold mineralization; ore-forming fluids; hematite; epithermal
- Citation
- 자원환경지질, v.41, no.3, pp.275 - 286
- Indexed
- KCI
- Journal Title
- 자원환경지질
- Volume
- 41
- Number
- 3
- Start Page
- 275
- End Page
- 286
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/124763
- ISSN
- 1225-7281
- Abstract
- The Sambo gold deposit located nearby the Cretaceous Hampyeong basin is composed of gold quartz fine
vein(the Jija vein) within Cretaceous rhyolite showing N10~20W trends as well as N5~10E trending quartz
veins(the Pungja, Gwangsan and Pungjaji veins) in Precambrian gneiss. The gold vein typically displays the intermittent
and irregular fine veins within rhyolite. Electrum is disseminated in wallrock along the fine cracks as well
as coexists with hematite replacing pyrite. Ore-forming fluids from the mineralized vein(H2O/-NaCl system, Th;
340~200oC, Salinity <2.7 eq. wt.% NaCl) and NE-trending veins(H2O-NaCl/-CO2 system, Th; 400~190oC, salinity
<7.9 eq. wt.% NaCl) are featured by dissimilar physicochemical conditions but their fluid evolution trends(boiling
and mixing) are similar with each other. Gold veins of the Sambo deposit filled along NNW-trending tension crack
are related to pull-apart basin evolution. Selective gold mineralization of the deposit reflect to dissimilarity between
two ore-forming fluid sources. Consequently, gold veining of the Sambo deposit formed at shallow-crustal level and
could be categorized into epithermal-type gold deposit related to tensional fractures filling triggered by Cretaceous
geodynamics.
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