Venting sites along the Fonualei and Northeast Lau Spreading Centers and evidence of hydrothermal activity at an off-axis caldera in the northeastern Lau Basin
SCIE
SCOPUS
Cited 43 time in
WEB OF SCIENCE
Cited 37 time in
Scopus
-
Title
- Venting sites along the Fonualei and Northeast Lau Spreading Centers and evidence of hydrothermal activity at an off-axis caldera in the northeastern Lau Basin
-
Author(s)
- Kim, Jonguk; Son, Seung-Kyu; Son, Ju-Won; Kim, Kyeong-Hong; Shim, Won Joon; Kim, Chang Hwan; Lee, Kyeong-Yong
- KIOST Author(s)
- Kim, Jonguk(김종욱); Son, Seung Kyu(손승규); Kim, Kyeong Hong(김경홍); Shim, Won Joon(심원준); Kim, Chang Hwan(김창환)
-
Alternative Author(s)
- 김종욱; 손승규; 손주원; 김경홍; 심원준; 김창환; 이경용
-
Publication Year
- 2009
-
Abstract
- The regional distribution of hydrothermal vent activity in the northeastern (NE) Lau Basin was recently reported by the Ridge 2000 program; however, active venting sources have yet to be located. Here, we report geological and hydrological evidence that indicates the presence of three active hydrothermal venting sources in the NE Lau Basin: the Fonualei Rift and Spreading Center (FRSC), the Northeast Lau Spreading Center (NELSC), and an off-axis caldera (MTJ-1). These examples of hydrothermal activity were recognized by the appearance of hydrothermal plume signals in the water column, including anomalies in light-transmission, methane, adenosine 5'-triphosphate (ATP), and trace metal concentrations (TDMn and TDFe). Three active venting sources were identified by the observation of possible buoyant plumes during conductivity-temperature-depth (CTD) tow-yo surveys and by the recovery of hydrothermal precipitates (chimneys and altered rocks). The strongest light-transmission anomaly, an order of magnitude greater than those at other sites, was observed at the central cone of the MTJ-1 caldera. The recovery of eruption debris at a central volcanic cone, including molten sulfur, volcanic ash, and lapilli, indicates an active volcanic eruption and hydrothermal venting at the MTJ-1 caldera. Our results suggest extensive and various hydrothermal activity in the NE Lau Basin, thereby providing valuable insight into hydrothermal and volcanic processes in back-arc environments.
-
ISSN
- 0016-7002
-
URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/4396
-
DOI
- 10.2343/geochemj.0.0164
-
Bibliographic Citation
- GEOCHEMICAL JOURNAL, v.43, no.1, pp.1 - 13, 2009
-
Publisher
- GEOCHEMICAL SOC JAPAN
-
Keywords
- NE Lau Basin; SW Pacific; hydrothermal venting; back-arc spreading; off-axis caldera
-
Type
- Article
-
Language
- English
-
Document Type
- Article
- Files in This Item:
-
There are no files associated with this item.
Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.