Hydrothermal Activity and Mineralization in Submarine Volcanoes of the Tonga Arc, Western Pacific

DC Field Value Language
dc.contributor.author 김종욱 -
dc.contributor.author 박상준 -
dc.contributor.author 김현섭 -
dc.contributor.author 형기성 -
dc.contributor.author 이경용 -
dc.contributor.author 문재운 -
dc.date.accessioned 2020-07-16T19:30:55Z -
dc.date.available 2020-07-16T19:30:55Z -
dc.date.created 2020-02-11 -
dc.date.issued 2010-10-06 -
dc.identifier.uri https://sciwatch.kiost.ac.kr/handle/2020.kiost/28756 -
dc.description.abstract Submarine hydrothermal activity and mineralization related to island arc volcanism along the Tonga arc were explored during two research cruises in October 2009 (KODOS 09H) and February 2010 (KODOS 10H), respectively. In KODOS 09H cruise, geophysical survey, including multi-beam bathymetry, marine seismic and magnetic investigations, was performed on 10 volcanoes to find out possible structural discontinuity that can act as fluid pathway for formation of hydrothermal deposits at submarine caldera system. The result provided acoustic and seismic image maps and magnetic anomaly maps of targeted volcanoes. Then, detailed seafloor observation and sampling as well as deep tow side scan sonar survey were performed in KODOS 10H cruise on 5 volcanoes which are selected as targeted areas from the previous cruise. Among 5 targeted volcanoes, TA26 shows most extensive hydrothermal activity. Hydrothermal vents and alteration zone were observed on western caldera and summit of eastern cone of the TA26. Although only weak hydrothermal alteration was observed on eastern cone, mineralized fragments of chimney and mound were sampled from western wall of central caldera on TA25 volcano. On TA12 volcano, strong hydrothermal plume and alteration zone was detected during video tows operated between SW scoria cone and small ridge. However, only small amount of hydrothermal altered rocks were collected from TA12. Although hydrothermal activity and mineralization might be formed, supported by plume detection and result of geophysical survey, only weak alteration zones were observed on other two volcanoes (TA19 and TA22). The exploration area generally show shallow depth up to several tens of meters on summit where subsurface boiling of hydrothermal fluid might occur due to low hydraulic pressure, which can affect on styles of hydrothermal venting and mineralization process observed on Tonga submarine arc volcanoes. -
dc.description.uri 1 -
dc.language English -
dc.publisher International Marine MIneral Society -
dc.relation.isPartOf 39th Underwater Mining Institute -
dc.title Hydrothermal Activity and Mineralization in Submarine Volcanoes of the Tonga Arc, Western Pacific -
dc.type Conference -
dc.citation.conferencePlace RU -
dc.citation.title 39th Underwater Mining Institute -
dc.contributor.alternativeName 김종욱 -
dc.contributor.alternativeName 박상준 -
dc.contributor.alternativeName 김현섭 -
dc.contributor.alternativeName 형기성 -
dc.contributor.alternativeName 이경용 -
dc.contributor.alternativeName 문재운 -
dc.identifier.bibliographicCitation 39th Underwater Mining Institute -
dc.description.journalClass 1 -
Appears in Collections:
Marine Resources & Environment Research Division > Ocean Georesources Research Department > 2. Conference Papers
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