Tavui

sopka – Caldera, Papua New Guinea, Southwestern Pacific Volcanic Regions

Kde

Papua New Guinea, Southwestern Pacific Volcanic Regions

Typ (GVP)

Caldera

Nadmořská výška

200 m

Tektonické prostředí

Subduction zone / Continental crust (> 25 km)

Poslední známá erupce

4 946 př. n. l.

Poloha

-4,109°, 152,213°

The mostly submarine Tavui caldera lies off the NE tip of the Gazelle Peninsula north of Rabaul caldera. The caldera was first discovered during a bathymetric cruise in 1985. The SW wall of the roughly 10 x 12 km caldera cuts the NE end of the peninsula and extends from Tavui Point at the northern tip of the peninsula SE to Laweo Point. The 7,100-year-old Raluan Ignimbrite, initially thought to have originated from Rabaul, is now thought to have been produced by an eruption of Tavui. A basaltic scoria layer immediately underlies the rhyolitic ignimbrite, and the introduction of basaltic magma was considered to have triggered the rhyolitic eruption. The lack of a major low-velocity region detectable beneath the caldera during a seismic tomography survey suggests that it is not currently active.

Text: Smithsonian Global Volcanism Program.

Údaje o sopce: Smithsonian Global Volcanism Program. Další sopky a průduchy.