Complex geochemical evolution of hydrothermal fluids related to breccia pipe Cu-W mineralization of the Dalseong mine, Korea
DC Field | Value | Language |
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dc.contributor.author | Heo, CH | - |
dc.contributor.author | Yun, ST | - |
dc.contributor.author | So, CS | - |
dc.contributor.author | Choi, SH | - |
dc.contributor.author | Youm, SJ | - |
dc.date.accessioned | 2021-09-09T12:33:55Z | - |
dc.date.available | 2021-09-09T12:33:55Z | - |
dc.date.created | 2021-06-18 | - |
dc.date.issued | 2001-06 | - |
dc.identifier.issn | 0077-7757 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/124396 | - |
dc.description.abstract | The Cu-W deposit of the Dalseong mine, Korea, occurs within a steeply plunging, pipe-like breccia zone (40-90 m by 120-240 m in horizontal dimension) of intensely altered andesitic rocks and lies about 1.5 km of a Cretaceous quartz monzonite stock. The hydrothermal mineralization occurs mainly as two stages (stages 1 and 2) of open space filling in breccia blocks (mainly, <1 to 30 cm in size). Stage 1 mineralization is classified into early matrix mineralization and late ore zone mineralization. The ore zone mineralization of stage 1 consists of quartz, tungstates, base-metal sulfides and carbonates, and is further divided into three mineralization periods: early W-Mo; middle base-metal sulfides; and late Bi-bearing sulfides and sulfosalts. Stage 2 mineralization occurs as barren carbonate veins. Fluid inclusion data indicate a complex evolution of the hydrothermal fluids. The earliest recorded fluid in quartz of the matrix mineralization of stage 1 is found as hypersaline (31-42 wt.% equiv. NaCl) fluid inclusions that are homogenized totally at high temperatures (440-550<degrees>C), and was likely formed by condensation of an immiscible magmatic vapor phase. Later fluids trapped in quartz of the early to middle periods of stage 1 ore zone mineralization occur as lower salinity (<20 wt.% equiv. NaCl), lower temperature (T-h-tot = 250-400 <degrees>C) fluid inclusions that consist of various types (aqueous vapor-rich, aqueous liquid-rich, liquid CO2-bearing, and halite-bearing). These fluid inclusions suggest the presence of compositionally heterogeneous fluids formed by fluid boiling and associated CO2 immiscibility. Fluid inclusions in quartz of the middle to late periods of stage 1 ore zone mineralization are aqueous liquid-rich and very low in total homogenization temperature (250-330 degreesC) and salinity (down to 12 wt.% equiv. NaCl), and record the history of mixing with cooler meteoric groundwater. Measured and calculated O and H isotope compositions of hydrothermal fluids gradually decrease with time (and decreasing temperature): delta O-18(H2O) values, from 6.3 to -1.0 parts per thousand; and deltaD(H2O) values, from -73 to -99 parts per thousand. This indicates the influx of progressively increasing amounts of meteoric groundwater into an early, W-Mo-depositing magmatic hydrothermal system. This increasing influx of meteoric water resulted in successive deposition of base-metal sulfides, Bi-bearing minerals, and finally carbonates. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | E SCHWEIZERBARTSCHE VERLAGS | - |
dc.subject | REPUBLIC-OF-KOREA | - |
dc.subject | VEIN DEPOSITS | - |
dc.subject | SYSTEM H2O-CO2-NACL | - |
dc.subject | GEOLOGIC SYSTEMS | - |
dc.subject | PHASE-RELATIONS | - |
dc.subject | STABLE ISOTOPE | - |
dc.subject | HIGH-PRESSURES | - |
dc.subject | ORE | - |
dc.subject | INCLUSIONS | - |
dc.subject | PORPHYRY | - |
dc.title | Complex geochemical evolution of hydrothermal fluids related to breccia pipe Cu-W mineralization of the Dalseong mine, Korea | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Yun, ST | - |
dc.contributor.affiliatedAuthor | So, CS | - |
dc.identifier.scopusid | 2-s2.0-0035632420 | - |
dc.identifier.wosid | 000169681200002 | - |
dc.identifier.bibliographicCitation | NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN, v.176, no.2, pp.127 - 151 | - |
dc.relation.isPartOf | NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN | - |
dc.citation.title | NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN | - |
dc.citation.volume | 176 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 127 | - |
dc.citation.endPage | 151 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Mineralogy | - |
dc.relation.journalWebOfScienceCategory | Mineralogy | - |
dc.subject.keywordPlus | REPUBLIC-OF-KOREA | - |
dc.subject.keywordPlus | VEIN DEPOSITS | - |
dc.subject.keywordPlus | SYSTEM H2O-CO2-NACL | - |
dc.subject.keywordPlus | GEOLOGIC SYSTEMS | - |
dc.subject.keywordPlus | PHASE-RELATIONS | - |
dc.subject.keywordPlus | STABLE ISOTOPE | - |
dc.subject.keywordPlus | HIGH-PRESSURES | - |
dc.subject.keywordPlus | ORE | - |
dc.subject.keywordPlus | INCLUSIONS | - |
dc.subject.keywordPlus | PORPHYRY | - |
dc.subject.keywordAuthor | Dalseong mine | - |
dc.subject.keywordAuthor | Korea | - |
dc.subject.keywordAuthor | breccia pipe Cu-W mineralization | - |
dc.subject.keywordAuthor | fluid inclusions | - |
dc.subject.keywordAuthor | O-H isotopes | - |
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