Bounty Seamount | |
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| |
Summit depth | 420 metres (1,380 ft) |
Location | |
Coordinates | 25°11′S 129°23′W / 25.183°S 129.383°W [1] |
Bounty Seamount is a seamount in the Pacific Ocean, which reaches a depth of 420 metres (1,380 ft) [2] or 450 metres (1,480 ft). It is about 3,950 metres (12,960 ft) high. [3]
The seamount is part of a group of seamounts about 100 kilometres (62 mi) away from Pitcairn Island, which includes several small seamounts and the large Adams Seamount. [4] These seamounts were discovered in 1989. [2]
Bounty has a conical shape, with three summit cones and several rift zones. Pillow lavas and hyaloclastite cover its slopes, [5] and parasitic vents can be observed as well. [6] The volcano has a volume of about 310 cubic kilometres (74 cu mi) and has a width of 19 kilometres (12 mi) at its foot. [7] Bounty has erupted rocks with compositions of alkali basalt, trachyandesite and trachyte. [8]
Bounty Seamount was formed in several stages, [2] and it could have developed over a time of 58,000 years. [6] Alkali basalts from Bounty have been dated by potassium-argon dating to be 344,000 ± 32,000 years before present. [9] Nevertheless, traces of recent volcanic activity and of hydrothermal venting have been found. [2]
This hydrothermal venting manifests itself by the release of low-temperature fluids and the formation of iron-rich crusts. [2] Temperatures of vented fluids amount to 14–19 °C (57–66 °F). [10]
Bounty Seamount | |
---|---|
| |
Summit depth | 420 metres (1,380 ft) |
Location | |
Coordinates | 25°11′S 129°23′W / 25.183°S 129.383°W [1] |
Bounty Seamount is a seamount in the Pacific Ocean, which reaches a depth of 420 metres (1,380 ft) [2] or 450 metres (1,480 ft). It is about 3,950 metres (12,960 ft) high. [3]
The seamount is part of a group of seamounts about 100 kilometres (62 mi) away from Pitcairn Island, which includes several small seamounts and the large Adams Seamount. [4] These seamounts were discovered in 1989. [2]
Bounty has a conical shape, with three summit cones and several rift zones. Pillow lavas and hyaloclastite cover its slopes, [5] and parasitic vents can be observed as well. [6] The volcano has a volume of about 310 cubic kilometres (74 cu mi) and has a width of 19 kilometres (12 mi) at its foot. [7] Bounty has erupted rocks with compositions of alkali basalt, trachyandesite and trachyte. [8]
Bounty Seamount was formed in several stages, [2] and it could have developed over a time of 58,000 years. [6] Alkali basalts from Bounty have been dated by potassium-argon dating to be 344,000 ± 32,000 years before present. [9] Nevertheless, traces of recent volcanic activity and of hydrothermal venting have been found. [2]
This hydrothermal venting manifests itself by the release of low-temperature fluids and the formation of iron-rich crusts. [2] Temperatures of vented fluids amount to 14–19 °C (57–66 °F). [10]