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Geosciences 2018, 8(4), 111; https://doi.org/10.3390/geosciences8040111

Geochemistry and Structure of Krakatoa Volcano in the Sunda Strait, Indonesia

1
Department of Geology, Bandung Institute of Technology, Bandung 40132, Indonesia
2
Global Geophysics Research Group, Bandung Institute of Technology, Bandung 40132, Indonesia
3
Department of Geology, Mineral Technology College of Indonesia, Bandung 40263, Indonesia
*
Author to whom correspondence should be addressed.
Received: 12 February 2018 / Revised: 23 March 2018 / Accepted: 23 March 2018 / Published: 26 March 2018
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Abstract

The violent eruption of Krakatoa Volcano located in the Sunda Strait, Indonesia, in 1883 represents one of the deadliest eruptions in human civilization. Although lots of data have been reported, the trajectory of the subducted slab and the upper mantle structure beneath this volcano are still rather poorly known. We combined geochemical data, major, trace and rare earth elements with seismic tomograms to characterize the deep structure of Krakatoa Volcano at the junction of Sumatra and Java subduction systems. Geochemical data are in agreement with the partial melting of mantle wedge in these subduction systems, based on previous studies, and this conclusion is also supported by inferences from P-wave tomographic model. Whereas, the tomographic image of S-wave suggests that subducted slab has been intruded by hot material of mantle upwelling. The presence of both partial melting of mantle wedge and mantle upwelling in the upper mantle might be caused by the thinning of subducted slab beneath Krakatoa Volcano. View Full-Text
Keywords: geochemistry; seismic tomogram; Krakatoa Volcano; Indonesia geochemistry; seismic tomogram; Krakatoa Volcano; Indonesia
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Abdurrachman, M.; Widiyantoro, S.; Priadi, B.; Ismail, T. Geochemistry and Structure of Krakatoa Volcano in the Sunda Strait, Indonesia. Geosciences 2018, 8, 111.

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