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Description
Vailulu'u marks the current location of the Samoan hotspot and has an active hydrothermal system. This Microsoft Excel file contains all temperature data and some display utilities for the Fee, Lefa, Sasa and Mafuie temperature recorders. |
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Geological Age Range and Timescale
1 - 0 Ma, Holocene |
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Location
14º 12.73' S 169º 03.44' W, Pacific Ocean, American Samoa, Vailulu'u Volcano, Rockne Seamount, Samoan Islands, Samoan Hotspot Trail |
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Instructions
The data are presented as Excel spreadsheets with useful plotting utilities to display the temperature data at any scale. Use the right-left-up-down buttons to navigate through the data and use the plus-minus buttons to zoom in or out of the data. You can also smooth the data by selecting a smoothing factor in the pulldown list. |
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Keywords
Underwater Volcano, Volcanic Crater, Hydrothermal System, Seamount, Hotspot, Minilog Temperature Recorders, Fee, Lefa, Sasa, Mafuie |
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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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