 |
| Detailed Seamount Information |
|---|
| Pasco Seamount |    |
 |
| Index | SMNT-131S-1744W |
Classification | Intermediate D3 Seamount |
| Location | 13º 05.99' S
174º 28.12' W |
Elongation
Irregularity | 2.17 ± 0.12
1.68 ± 0.12 |
| Plate Age | |
Oceanic Province | Abyssal Plain |
| Region | Samoan Hotspot Trail |
Alternative Names | |
| Plate | Pacific Plate |
Age | |
| Tectonic Setting | Hotspot Trail |
Seamount Top | 395 m |
| Volume | 5223 km3 |
Ocean Bottom | 3305 m |
Shelf Edge
| |
Volcanic Activity | Extinct |
|
| | Description | | Pasco Seamount is located at 13¿ 6'S, 174¿ 28.1' W and is part of the Samoan Hotspot Trail on the Pacific Plate. The seamount is 2910 m high with the top at -395 m and ocean bottom at -3305 m. It is intermediate in size with a volume of 5222 km3. It has a shallow saucer shaped bank and is about 30-100 km across. The seamount lies along the trend of the Savaii-Upolu post erosional rift zone and is elongated in that direction with an azimuth of approximately 80¿. Olivine nephelinites were recovered from Pasco's banks which had a similar composition to the post-erosional lavas of the Samoan Islands. |
| |
|
|
 |
Pasco Seamount -- Multibeam data merged with predicted satellite bathymetry |
 |
|
Pasco Seamount -- Multibeam bathymetry |
|
|
Pasco Seamount -- Predicted satellite bathymetry |
|
|
Pasco Seamount -- Residual bathymetry |
|
|
|
Samoan Hotspot Trail -- Multibeam bathymetry |
|
|
Samoan Hotspot Trail -- Predicted satellite bathymetry |
|
|
Samoan Hotspot Trail -- Tile 2 -- Multibeam data merged with predicted satellite bathymetry |
|
|
Samoan Hotspot Trail -- Tile 2 -- Multibeam bathymetry |
|
|
Samoan Hotspot Trail -- Tile 2 -- Predicted satellite bathymetry |
|
|
Samoan Hotspot Trail -- Tile 2 -- Residual bathymetry |
|
|
Samoan Hotspot Trail -- Tile 3 -- Multibeam data merged with predicted satellite bathymetry |
|
|
Samoan Hotspot Trail -- Tile 3 -- Multibeam bathymetry |
|
|
Samoan Hotspot Trail -- Tile 3 -- Predicted satellite bathymetry |
|
|
Samoan Hotspot Trail -- Tile 3 -- Residual bathymetry |
|
|
|
|
|
|
Pasco Seamount -- Multibeam data merged with predicted satellite bathymetry |
|
|
Pasco Seamount -- Multibeam bathymetry |
|
|
Pasco Seamount -- Predicted satellite bathymetry |
|
|
Pasco Seamount -- Residual bathymetry |
|
|
|
Samoan Hotspot Trail -- Multibeam bathymetry |
|
|
Samoan Hotspot Trail -- Predicted satellite bathymetry |
|
|
Samoan Hotspot Trail -- Tile 2 -- Multibeam data merged with predicted satellite bathymetry |
|
|
Samoan Hotspot Trail -- Tile 2 -- Multibeam bathymetry |
|
|
Samoan Hotspot Trail -- Tile 2 -- Predicted satellite bathymetry |
|
|
Samoan Hotspot Trail -- Tile 2 -- Residual bathymetry |
|
|
Samoan Hotspot Trail -- Tile 3 -- Multibeam data merged with predicted satellite bathymetry |
|
|
Samoan Hotspot Trail -- Tile 3 -- Multibeam bathymetry |
|
|
Samoan Hotspot Trail -- Tile 3 -- Predicted satellite bathymetry |
|
|
Samoan Hotspot Trail -- Tile 3 -- Residual bathymetry |
|
|
|
|
|
|
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. |
|
|
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. |
|
|
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. |
|
|
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. |
|
|
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. |
|
|
|
|
|
| Depth |
Azimuth |
Area |
Length |
Width |
Elongation |
Contour |
Ellipse |
Irregularity |
|
| m |
degrees |
km2 |
km |
km |
ratio |
km |
km |
ratio |
|
|
| 1559 |
80.2 |
744.8 |
61.9 |
30.3 |
2.042 |
191.9 |
106.0 |
1.811 |
| 1850 |
81.0 |
979.0 |
69.3 |
30.6 |
2.265 |
196.3 |
124.7 |
1.574 |
| 2141 |
79.3 |
1228.1 |
75.0 |
33.9 |
2.211 |
227.8 |
138.8 |
1.641 |
|
| 41 % Multibeam Coverage |
2.17 ± 0.12 |
1.68 ± 0.12 |
| 2910 m High |
| 2 Summits |
|
|
|
|
|
|