Browse > Article
http://dx.doi.org/10.9719/EEG.2014.47.4.395

Magnetic Characteristics of TA19-1 and TA19-2 Seamounts in the Lau Basin, the South Western Pacific  

Kim, Chang Hwan (Dokdo Research Center, East Sea Research Institute, Korea Institute Of Ocean Science & Technology)
Publication Information
Economic and Environmental Geology / v.47, no.4, 2014 , pp. 395-404 More about this Journal
Abstract
We conducted the geophysical survey of possible hydrothermal vent sites at 2009, in the Lau Basin, the south western Pacific and analyzed the magnetic characteristics of TA19-1 and TA19-2 seamounts. TA19-1 is a cone-shaped seamount with a caldera summit. TA19-2 seamount is bigger and shows more complicated topography than TA19-1 seamount. TA19-2 has a large caldera, a summit in the west side of the caldera and several crests. Simple dipole anomalies with a high over the north and a low over the south occur in TA19-1 seamount. High magnetic anomalies are located in the northern flank and the summit of TA19-2 seamount and low anomalies around the summit and the caldera. The results of bathymetry and magnetic data suggest that TA19-2 seamount might have more complicated magmatic process than TA19-1. Low magnetization zones are located over the summit, the calderas and the caldera rims. The magnetization lows indicate that submarine hydrothermal vents, along faults and fracture zones, could have caused an alteration of magnetic minerals. The magnetization highs over the summit and the calderas might have been related with later magmatisms like volcanic sills, intrusions.
Keywords
hydrothermal vent; seamount; magnetic characteristic; caldera; magnetization;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Arculus, R.J. (2005) Arc-backarc systems of northern Kermadec-Tonga. Proc. 2005 New Zealand Minerals Conference, p.45-50.
2 Baker, E.T. and German, C.R. (2004) On the global distribution of mid-ocean ridge hydrothermal vent-fields. In German, C.R., Lin, J., Parson, L.M. (ed.) The Thermal Structure of the Oceanic Crust and the Dynamics of Seafloor Hydrothermal Circulation. Geophys. Monogr. Ser. 148, AGU, Washington DC, p.245-266.
3 Baker, E.T., Resing, J.A., Walker, S.L., Martinez, F., Taylor, B. and Nakamura, K. (2006) Abundant hydrothermal venting along melt-rich and melt-free ridge segments in the Lau back-arc basin. Geophys. Res. Lett., v. 33, L07308, doi:10.1029/2005GL025283.   DOI   ScienceOn
4 De Ronde, E., Massoth, J.G.J., Baker, E.T. and Lupton, J.E. (2003) Submarine hydrothermal venting related to volcanic arc. Soc. Econ. Geol. Spec. Pub., v.10, p.91-110.
5 Hergt, J.M. and Woodhead, J.D. (2007) A critical evaluation of recent models for Lau-Tonga arc-backarc basin magmatic evolution. Chem. Geol., v.245, p.9-44.   DOI   ScienceOn
6 Ishibash, J. and Urabe, T. (1995) Hydrothermal activity related to arc-backarc magmatism in the Western Pacific. In Taylor, B. (ed.) Backarc Basins: Tectonics and Magmatism. Plenum Press, New York, p.451-495.
7 KIOST (2010) 2009 Exploration of deep sea hydrothermal vent in Tonga. Korea Institute Of Ocean Science & Technology, Seoul, 590p.
8 Kim, H.J., Jou, H.T., Lee, G.H., Na, J.H., Kim, H.S., Jang, U.G., Lee, K.Y., Kim, C.H., Lee, S.H., Park, C.H., Jung, S.K. and Suk, B.C. (2013) Caldera structure of submarine Volcano #1 on the Tonga Arc at $21^{\circ}09, southwestern Pacific: Analysis of multichannel seismic profiling. Earth Planets Space, v.65, p.893-900.   DOI
9 Kim, H.S., Jung, M.S., Kim, C.H., Kim, J.U. and Lee, K.Y. (2008) The Exploration Methodology of Seafloor Massive Sulfide Deposit by Use of Marine Geophysical Investigation. Mulli-Tamsa, v.11, p.167-176.
10 KIOST (2008) 2007 Exploration of deep sea hydrothermal vent in Tonga. Korea Institute Of Ocean Science & Technology, Seoul, 610p.
11 Nabighian, M.N. (1972) The analytic signal of two-dimensional magnetic bodies with polygonal cross-section: Its properties and use for automated anomaly interpretation. Geophy., v.37, p.507-517.   DOI
12 Nabighian, M.N. (1974) Additional comments on the analytic signal of two-dimensional magnetic bodies with polygonal cross-section. Geophy., v.39, p.85-92.   DOI
13 Nettletton, L.L. (1962) Gravity and magnetics for geologists and geophysicists. Bull. Am. Assoc. Petrol. Geol., v.48, p.1815-1838.
14 Parker, R.L. and Huestis, S.P. (1974) The inversion of magnetic anomalies in the presence of topography. Jour. Geophys. Res., v.79, p.1587-1593.   DOI
15 Sager, W.W., Lamarche, A.J. and Kopp, C. (2005) Paleomagnetic modeling of seamounts near the Hawaiian-Emperor bend. Tectonophy., v.405, p.121-140.   DOI   ScienceOn
16 Tivey, M.A. (1994) Fine-scale magnetic anomaly field over the southern Juan de Fuca Ridge: Axial magnetization low and implications for crustal structure. Jour. Geophs. Res., v.99, p.4833-4855.   DOI
17 Tivey, M.A. and Schouten, H. (2003) A near-bottom magnetic survey of the Mid-Atlantic Ridge axis at $26^{\circ}N$: Implications for the tectonic evolution of the TAG segment. Jour. Geophs. Res., v.108, n.B5, 2277.   DOI
18 Searle, R.C., Murton, B.J., Achenbach, K., Lebas, T., Tivey, M., Yeo, I., Cormier, M.H., Carlut, J., Ferreira, P., Mallows, C., Morris, K., Schroth, N., Calsteren, P. and Waters, C. (2010) Structure and development of an axial volcanic ridge: Mid-Atlantic Ridge, $45^{\circ}N$. Earth Planet. Sci. Lett., v.299, p.228-241.   DOI   ScienceOn
19 Smith, D.K., Tivey, M.A., Schouten, H. and Cann, J.R. (1999) Locating the spreading axis along 80 km of the Mid-Atlantic Ridge south of the Atlantis Transform. J. Geophys. Res., v.104, p.7599-7612.   DOI
20 Tivey, M.A., Rona, P.A. and Schouten, H. (1993) Reduced crustal magnetization beneath the active sulfide mound, TAG hydrothemal field, Mid-Atlantic Ridge $26^{\circ}N$. Earth Planet. Sci. Lett., v.115, p.101-115.   DOI   ScienceOn
21 Wormald, S.C., Wright, I.C., Bull, J.M., Lamarche, G., and Sanderson, D.J. (2012) Morphometric analysis of the submarine arc volcano Monowai(Tofua-Kermadec Arc) to decipher tectono-magmatic interactions. Jour. Vol. Geother. Res., v.239-240, p.69-82.   DOI   ScienceOn
22 Wright, D.J., Bloomer, S.H., Macleod, C.J., Taylor, B. and Goodlife, A.M. (2000) Bathymetry of the Tonga Trench and Forearc: a map series. Marine Geophy. Res., v.21, p.489-511.   DOI   ScienceOn
23 Zellmer, K. and Taylor, B. (2001) A three-plate kinematic model for Lau Basin opening. Geochem. Geophys. Geosyst., v.2, 200GC000106, ISSN: 1525-2027.
24 Schouten, H., Tivey, M.A., Fornari, D.J. and Cochran, J.R. (1999) Central anomaly magnetization high: constraints on the volcanic construction and architecture of seismic layer 2A at a fast-spreading mid-ocean ridge, the EPR at $9^{\circ}30-50'N. Earth Planet. Sci. Lett., v.169, p.37-50.   DOI   ScienceOn