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| Detailed Seamount Information |
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| Upolu Island |    |
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| Index | SMNT-139S-1718W |
Classification | Very Large C3 Island |
| Location | 13º 54.02' S
171º 50.07' W |
Elongation
Irregularity | 2.43 ± 0.10
1.46 ± 0.08 |
| Plate Age | |
Oceanic Province | Abyssal Plain |
| Region | Samoan Hotspot Trail |
Alternative Names | |
| Plate | Pacific Plate |
Age | |
| Tectonic Setting | Hotspot Trail |
Seamount Top | 0 m |
| Volume | 30673 km3 |
Ocean Bottom | 3865 m |
Shelf Edge
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Volcanic Activity | Extinct |
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| | Description | | Upolu Island is located at 13¿ 54' S, 171¿ 50.1' W and is part of the Samoan Hotspot Trail on the Pacific Plate. The Island is 3865 m tall from sealevel to the ocean bottom at -3865 m. It is very large with a volume of 30673 km3. It is moderately elongated in an east west direction with an azimuth of approximately 105¿. The edges of the seamount are moderately irregular. |
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Upolu Island -- Multibeam data merged with predicted satellite bathymetry |
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Upolu Island -- Multibeam bathymetry |
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Upolu Island -- Predicted satellite bathymetry |
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Upolu Island -- Residual bathymetry |
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American Samoa -- Multibeam data merged with predicted satellite bathymetry |
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American Samoa -- Multibeam bathymetry |
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American Samoa -- Predicted satellite bathymetry |
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American Samoa -- Residual bathymetry |
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Samoan Hotspot Trail -- Multibeam bathymetry |
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Samoan Hotspot Trail -- Predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 1 -- Multibeam data merged with predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 1 -- Multibeam bathymetry |
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Samoan Hotspot Trail -- Tile 1 -- Predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 1 -- Residual bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Multibeam data merged with predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Multibeam bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Residual bathymetry |
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Upolu Island -- Multibeam data merged with predicted satellite bathymetry |
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Upolu Island -- Multibeam bathymetry |
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Upolu Island -- Predicted satellite bathymetry |
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Upolu Island -- Residual bathymetry |
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American Samoa -- Multibeam data merged with predicted satellite bathymetry |
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American Samoa -- Multibeam bathymetry |
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American Samoa -- Predicted satellite bathymetry |
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American Samoa -- Residual bathymetry |
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Samoan Hotspot Trail -- Multibeam bathymetry |
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Samoan Hotspot Trail -- Predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 1 -- Multibeam data merged with predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 1 -- Multibeam bathymetry |
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Samoan Hotspot Trail -- Tile 1 -- Predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 1 -- Residual bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Multibeam data merged with predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Multibeam bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Residual bathymetry |
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Brocher, T.M. (1985). On the age progression of the seamounts west of the Samoan Islands, SW Pacific. In: Investigations of the Northern Melanesian Borderland. Brocher, T.M. (Editors), Circum-Pacific Council for Energy and Mineral Resources, Houston. 3: 173-185. |
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Clouard, V. and Bonneville, A. (2001). Ages of seamounts, islands and plateaus on the Pacific plate. 1-42. |
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Duncan, R.A. (1985). Radiometric ages from volcanic rocks along the New Hebrides-Samoa Lineament. In: Investigations of the northern Melanesian Borderland. Brocher, T.M. (Editors), Circum-Pacific Council for Energy and Mineral Resources, Houston. 3: 67-76. |
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Hart, S.R. (2004). Collaborative research: The Samoan Hotspot, Past and Present. In: Collaborative research: The Samoan Hotspot, Past and Present. Woods Hole Oceanographic Institution, Woods Hole, MA. |
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Hill, P.J. and Tiffin, D.L. (1993). Geology, sediment patterns, and widespread deformation on the sea floor off Western Samoa revealed by wide-swath imagery. Geo-Marine Letters 13(2): 116-125. |
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Keating, B.H. (1987). Summary of radiometric ages from the Pacific. In: Intergovernmental Oceanographic Comission technical series. UNESCO. 32. |
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Natland, J.H. (1980). The progression of volcanism in the Samoan linear volcanic chain. In: The Jackson Volume. Irving, A.J. and Dungan, M.A. (Editors), Kline Geology Laboratory, Yale University, New Haven. 280-A(2): 709-735. |
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Palacz, Z.A. and Saunders, A.D. (1986). Coupled trace element and isotope enrichment in the Cook-Austral-Samoa islands, Southwest Pacific. Earth and Planetary Science Letters 79(3-4): 270-280. doi: 10.1016/0012-821X(86)90185-8. |
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Wright, E. and White, W.M. (1987). The origin of Samoa; new evidence from Sr, Nd, and Pb isotopes. Earth and Planetary Science Letters 81(2-3): 151-162. doi: 10.1016/0012-821X(87)90152-X. |
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Workman, R.K., Hart, S.R., Jackson, M., Regelous, M., Farley, K.A., Blusztajn, J., Kurz, M. and Staudigel, H. (2004). Recycled metasomatized lithosphere as the origin of the Enriched Mantle II (EM2) end-member: Evidence from the Samoan Volcanic Chain. Geochemistry Geophysics Geosystems 5: doi: 10.1029/2003GC000623. issn: 1525-2027. |
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Hart, S., Coetzee, M., Workman, R., Blusztajn, J., Johnson, K., Sinton, J., Steinberger, B. and Hawkins, J. (2004). Genesis of the Western Samoa seamount province: age, geochemical fingerprint and tectonics. Earth and Planetary Science Letters 227(1-2): 37-56. doi: 10.1016/j.epsl.2004.08.005. |
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| Depth |
Azimuth |
Area |
Length |
Width |
Elongation |
Contour |
Ellipse |
Irregularity |
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| m |
degrees |
km2 |
km |
km |
ratio |
km |
km |
ratio |
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| 1546 |
105.9 |
2798.4 |
133.7 |
54.6 |
2.448 |
332.0 |
215.6 |
1.540 |
| 1933 |
105.4 |
3399.2 |
145.7 |
62.7 |
2.325 |
343.6 |
234.1 |
1.468 |
| 2319 |
105.2 |
4132.0 |
170.4 |
67.5 |
2.524 |
363.1 |
264.3 |
1.374 |
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| 47 % Multibeam Coverage |
2.43 ± 0.10 |
1.46 ± 0.08 |
| 3865 m High |
| 1 Summit |
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