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| Detailed Reference Information |
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Staudigel, H., Hart, S.R., Koppers, A., Constable, C., Workman, R., Kurz, M. and Baker, E.T. (2004). Hydrothermal venting at Vailulu'u Seamount: the smoking end of the Samoan chain. Geochemistry, Geophysics, Geosystems 5(2): |
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EarthRef Digital Archive |
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| BACKGROUND DATA FILES |
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Abstract |
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Appendix A : Supplemental Data |
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Table A1 |
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Table A2 |
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Table A2 (continued) |
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Appendix B: Supplemental Data |
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Table B1 |
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Data Aquisition & Methods |
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Keywords
Hydrothermal, seamount, hot spots, Oceanography, Biological and Chemical, Hydrothermal systems, Information Related to Geographic Region, Pacific Ocean, Marine Geology and Geophysics, Heat flowand hydrothermal processes |
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Project -- Other Projects -- Vailulu'u: the Active Samoan Hotspot Volcano
Vailulu'u Seamount is identified as an active volcano marking the current location of the Samoan hotspot. This seamount is located 45 km east of Ta¿u Island, Samoa, at 169¿03.5¿W, 14¿12.9¿S. Vailulu'u defines the easternmost edge of the Samoan Swell, rising from 5000m ocean floor to a summit depth of 590m, and marked by a 400m deep and 2 km wide summit crater. Its broad western rift and stellate morphology brand it as a juvenile progeny of Ta¿u. Seven dredges, ranging from the summit to the SE Rift zone at 4200m, recovered only alkali basalts and picrites. Isotopically, the volcano is strongly EM2 in character and clearly of Samoan pedigree (87Sr/86Sr: 0.7052-0.7067; 143Nd/144Nd: 0.51267-0.51277; 206Pb/204Pb: 19.19-19.40). 210Po-210Pb data on two summit basalts indicate ages younger than 50 years; all of the recovered rocks are extremely fresh, and veneered with glass. An earthquake swarm in early 1995 may attest to a recent eruption cycle. |
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