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Nuova Zelanda · Stratovulcano

Clark Seamount

Clark

Tipo
Stratovulcano
Altitudine
860 m (sottomarino)
Ultima eruzione
Sconosciuto
Diffuse hydrothermal venting and sulfide chimneys were observed near the summit of Clark volcano during a New Zealand-American NOAA Vents Program expedition in 2005. Hot water (221°C, 430°F) was sampled at the base of this sulfide chimney, which is almost 6 m high. Clark submarine volcano lies near the lower end of the Southern Kermadec Arc and is the southernmost volcano of the submarine chain that displays known hydrothermal activity.
Diffuse hydrothermal venting and sulfide chimneys were observed near the summit of Clark volcano during a New Zealand-American NOAA Vents Program expedition in 2005. Hot water (221°C, 430°F) was sampled at the base of this sulfide chimney, which is almost 6 m high. Clark submarine volcano lies near the lower end of the Southern Kermadec Arc and is the southernmost volcano of the submarine chain that displays known hydrothermal activity. · Foto: Image courtesy of New Zealand-American Submarine Ring of Fire 2005 Exploration, NOAA Vents Program.
Tipo
Stratovulcano
Paese
Nuova Zelanda
Regione
Tonga e Kermadec / Southern Kermadec Volcanic Arc
Altitudine
860 m (sottomarino)
Coordinate
-36.446, 177.839
Ultima eruzione
Sconosciuto
Contesto tettonico
Zona di subduzione / Crosta oceanica (< 15 km)
Forma vulcanica
Composito
Roccia principale
Basalto / Picrobasalto
Sintesi geologica

The submarine Clark stratovolcano lies near the southern end of the Southern Kermadec arc. This basaltic and dacitic edifice consists of a basal substrate of massive lava flows, pillow lavas, and pillow tubes overlain by volcaniclastic sediments. Craters are present along the complex crest. Clark is the southernmost volcano of the submarine chain that displays hydrothermal activity. Diffuse hydrothermal venting and sulfide chimneys were observed near the summit during a New Zealand-American NOAA Vents Program expedition in 2006.

Sintesi da Wikipedia

Riassunto in inglese

Clark is a dormant submarine volcano located off the northern coast of New Zealand and is one of the South Kermadec Ridge Seamounts.

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