Cadamosto Seamount
| Cadamosto | |
|---|---|
  Cadamosto 20 km southwest of Brava, Cape Verde | |
| Highest point | |
| Elevation | −1,500 m (−4,900 ft) |
| Listing | Seamounts |
| Coordinates | 14°40′0″N 24°55′0″W / 14.66667°N 24.91667°WCoordinates: 14°40′0″N 24°55′0″W / 14.66667°N 24.91667°W |
| Geography | |
| Location | 20 km southwest of Brava, Cape Verde |
| Geology | |
| Mountain type | Stratovolcano |
| Last eruption | unknown |
The Cadamosto Seamount is a seamount in the North Atlantic Ocean just 20 km southwest of the island of Brava, Cape Verde.
The seamount is named after the explorer Alvise Cadamosto who explored Cape Verde in 1456.
Geography and geology
The seamount is at the southwestern end of the Cape Verde Rise and is located near the Cape Verde Basin. It forms a part of the Fogo-Brava Platform which also includes Ilhéus do Rombo. The lowest point is 4,400 below sea level at the ocean floor. The flattened tip is at 2,900 meters below sea level. The highest point is about 1,500 meters below sea level.
Rock formations composes of phonolithic rocks, a part makes up of crystallized nephelite. Other rocks includes clinopyroxene, titanite, apatite and feldspar.[1]
The seamount's magma is about 206Pb/204Pb ratio of 19.5 isotope moderately to depleted mantle with a very high εNd component.[2]
Earthquakes
Earthquakes occurred at the seamount between 1998 and 2004 and shook the island of Brava. The last earthquake measured at 4.3 on the Richter magnitude scale.[3]
References
- ↑ Barker, K. Abigail (2011). Magmatic Evolution of the Cadamosto Seamount, Cape Verde. Beyond the Spatial Extent of EM1. Contributions to Mineralogy and Petrology. 163. pp. 949–955. doi:10.1007/s00410-011-0708-2.
- ↑ Dupré, Bernard; Allére, Claude J. (1980). "Pb-Sr-Nd Isotopic Correlation and the Chemistry of the North Atlantic Mantle". Nature. pp. 17–22. doi:10.1038/286017a0. Retrieved November 3, 2016.
- ↑ Grevemeyer, Ingo (2010). Seismic Activity at Cadamosto Seamount near Fogo Island, Cape Verdes — Formation of a New Ocean Island?. 180. Geophysical Journal International. pp. 552–558. doi:10.1111/j.1365-246X.2009.04440.x.