Geological Summary

The low Sukadana Plateau, 30 x 11 km wide, is a volcanic expression of the Sukadana Basalts of Pleistocene age (Barber et al., 2005). The plateau itself covers an area of approximately 1000 km² and contains fissure-fed lava flows 2-3 m thick issued from NW-SE trending fissures (Barber et al., 2005; van Bemmelen 1949b). The basaltic region may be over 200 m thick in areas, localized around eruptive centers, but no deposits greater than 10 m have been observed. Some columnar jointing is present. K-Ar dating gave ages ranging from 0.44 Ma to 1.15 Ma for the oldest samples (Soeria-Atmadja et al., 1985 in Barber et al., 2005), but more recent ages measured from more well-preserved flows and spatter cones are around 0.01 to 0.8 million years. Sukadana is technically part of the back-arc region of the Sumatra Volcanic Arc Segment, evidenced by notable textural and compositional differences from the arc volcanics, as well as a similarity to the back-arc Bukit Telor basalts (Barber et al., 2005).

References

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography.

Barber A J, Crow M J, Milsom J S, 2005. Sumatra: Geology, Resources and Tectonic Evolution. Geological Society, London, Memoirs, v. 31.

Latter J H, 1975. The history and geography of active and dormant volcanoes. A worldwide catalogue and index of active and potentially active volcanoes, with an outline of their eruptions.. Unpublished manuscript, unpaginated.

Mangga S A, 1994. Geologi Lembar Tanjung Karang, Sumatera. Pusat penelitian & Pengembangan Geologi. Bandung.

Nishimura S, Nishida J, Yokoyama T, Hehuwat F, 1986. Neo-Tectonics of the Straight of Sunda, Indonesia. Journal of Southeast Asian Earth Sciences, v. 1, no. 2, p. 81-91.

van Bemmelen R W, 1949. The Geology of Indonesia. The Hague: Government Printing Office, v 1, 732 p.