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Todoko-Ranu

Caldera · Indonesia · 979 m

The twin caldera complex of Todoko-Ranu appears in this NASA Landsat image of western Halmahera Island (with north to the top). Todoko caldera (the circular feature just left of center) lies SW of nested calderas at Ranu, the northern of which contains a lake, faintly visible above the clouds above and to the right of the center of the image. No historical eruptions have been reported from the complex, but fumaroles and hot springs are present, and youthful-looking lava flows have reached the sea.
The twin caldera complex of Todoko-Ranu appears in this NASA Landsat image of western Halmahera Island (with north to the top). Todoko caldera (the circular feature just left of center) lies SW of nested calderas at Ranu, the northern of which contains a lake, faintly visible above the clouds above and to the right of the center of the image. No historical eruptions have been reported from the complex, but fumaroles and hot springs are present, and youthful-looking lava flows have reached the sea. · Foto: NASA Landsat 7 image (worldwind.arc.nasa.gov) · Wikimedia Commons
Tipo
Caldera
País
Indonesia
Región
Western Pacific Volcanic Regions / Halmahera Volcanic Arc
Altitud
979 m
Coordenadas
1.239, 127.456
Última erupción
Desconocido
Contexto tectónico
Subduction zone / Oceanic crust (< 15 km)
Forma volcánica
Composite
Roca principal
Andesite / Basaltic Andesite
Resumen geológico

Todoko-Ranu is a large volcanic complex south of Gamkonora in North Maluku, Halmahera, that includes two calderas. The 2 x 2.8 km nested Ranu calderas on the north contains a caldera lake in the smaller one. The lava-filled Todoko caldera is south of the Ranu calderas. The post-caldera Sahu cone, on the S flank of Todoko, is the high point of the complex. Gunung Onu, NW of Ranu caldera, lies at the northern end of the complex. No eruptions have been reported, but it was mapped as Holocene (Supriatna, 1980). Fumaroles are present at Ranu caldera and hot springs are found on Mt. Sahu. Youthful-looking lava flows reach the sea from several locations within the complex.

Resumen de Wikipedia

Resumen en inglés

Todoko-Ranu is a twin caldera complex on Halmahera island, Indonesia. The 2 km wide of lava-filled Todoko caldera is at the south of the 2 × 2.8 km wide of Ranu caldera. The Ranu caldera contains a volcanic cone Sahu and a caldera lake at the north side. No historical records are found from the caldera complex.

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