Caldera structure of submarine Volcano #1 on the Tonga Arc at 21 degrees 09 ' S, southwestern Pacific: Analysis of multichannel seismic profiling SCIE SCOPUS

Cited 4 time in WEB OF SCIENCE Cited 4 time in Scopus
Title
Caldera structure of submarine Volcano #1 on the Tonga Arc at 21 degrees 09 ' S, southwestern Pacific: Analysis of multichannel seismic profiling
Author(s)
Kim, Han-Joon; Jou, Hyeong-Tae; Lee, Gwang-Hoon; Na, Ji-Hoon; Kim, Hyun-Sub; Jang, Ugeun; Lee, Kyeong-Yong; Kim, Chang-Hwan; Lee, Sang Hoon; Park, Chan-Hong; Jung, Seom-Kyu; Suk, Bong-Cool
KIOST Author(s)
Kim, Han Joon(김한준)Jou, Hyeong Tae(주형태)Kim, Hyun Sub(김현섭)Lee, Sang Hoon(이상훈)
Publication Year
2013
Abstract
Volcano #1 is a large submarine stratovolcano with a summit caldera in the south central part of the Tonga Arc. We collected and analyzed multichannel seismic profiles in conjunction with magnetic data from Volcano #1 to investigate the structure of the intracaldera fill and processes of caldera formation. The intracaldera fill, exhibiting stratified units with a maximum thickness of 2 km, consists of at least four seismic units and a thick wedge of landslide debris derived from the caldera wall. The structural caldera floor, deepening toward the northwestern rim, suggests asymmetric collapse in the initial stage, which, in turn, appears to have contributed to the creation of a caldera elongated to the northwest by enhancing gravitational instability along the northwestern caldera boundary. Occasional, but repeated, eruptions resulted in a thick accumulation of the intracaldera fill and further subsidence in the mode of piston collapse. Magnetization lows are well-defined along the structural rim of the caldera that is interpreted as the inner principal ring fault. The magnetization lows indicate sites of submarine hydrothermal vents that caused an alteration of magnetic minerals. Faults recognized on the outer slope of the volcano are interpreted to be involved in hydrothermal fluid circulation.
ISSN
1343-8832
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3347
DOI
10.5047/eps.2013.01.002
Bibliographic Citation
EARTH PLANETS AND SPACE, v.65, no.8, pp.893 - 900, 2013
Publisher
TERRA SCIENTIFIC PUBL CO
Keywords
Tonga Arc; Volcano #1; multichannel seismic sections; caldera infill; seismic unit; magnetic anomaly; hydrothermal activity
Type
Article
Language
English
Document Type
Article
Publisher
TERRA SCIENTIFIC PUBL CO
Related Researcher
Research Interests

hydrothermal deposits,geophysical prospecting,underwater seismic,해저열수광상,지구물리탐사,수중음향

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