Moktikanana, M.L.A. and Wibowo, H.E. and Rahayu, E. and Harijoko, A. (2021) Hummock size and alignment in Gadung debris avalanche deposit, Raung Volcanic Complex, East Java, Indonesia. In: International Conference on Geological Engineering and Geosciences.
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Abstract
Debris avalanche deposit is formed by the failure of volcanic edifice and has a high potential to directly impact human civilization. The famous characteristic landform of debris avalanche deposit is hummocky hills. To understand the dynamics of avalanche flow, we investigate the morphometric characters of debris avalanche hummocks from Gunung Gadung in Raung Volcanic Complex. The collapse of Gunung Gadung follows two main flow direction with two different kinds of debris avalanche, i.e., freely spreading and valley filling. Our study recorded that there is no significant correlation between hummock size and distance from the source. The distribution of Gadung hummock size is mainly controlled by pre-existing morphologic feature such as Iyang-Argapura Volcanic Complex and Meru Betiri Mountains. We identify four domains area of Gadung debris avalanche flow based on hummock size distribution, which are Toreva domain, Hummock domain, Collision domain, and Oblique collision domain. Hummock orientation and displacement angle of Gadung debris avalanche deposit depend on structural regime existed in certain area. Compressional regime may occur because of collision between Gadung avalanche flow and Iyang-Argapura Volcanic Complex, or shifting of main flow direction. Meanwhile, extensional regime may happen due to decreasing in slope and spreading of avalanche flow. © Published under licence by IOP Publishing Ltd.
Item Type: | Conference or Workshop Item (Paper) |
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Additional Information: | Cited by: 3; Conference name: 2021 International Conference on Geological Engineering and Geosciences, ICGoES 2021; Conference date: 16 March 2021 through 18 March 2021; Conference code: 173383; All Open Access, Gold Open Access |
Subjects: | Q Science > QE Geology |
Divisions: | Faculty of Engineering > Geological Engineering Department |
Depositing User: | Sri JUNANDI |
Date Deposited: | 09 Oct 2024 02:54 |
Last Modified: | 09 Oct 2024 02:54 |
URI: | https://ir.lib.ugm.ac.id/id/eprint/5137 |