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Journal article
Volcano-tectonic controls on the morphology and volcanic rift zone configuration on Bioko Island (Equatorial Guinea) derived from TanDEM-X data
Bulletin of volcanology, v 86(8), 76
03 Aug 2024
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Abstract
The morphology of the shield volcanoes on Bioko, a volcanic island in central Africa, is controlled both by tectonic and volcanic processes, but the complex interplay of these regional and local mechanisms is poorly understood. Using a TanDEM-X digital elevation model, we are able to create an inventory of 436 vents and monogenetic cones, and over 1330 structural elements and lineaments, and perform a comprehensive morphological and geospatial analysis. We provide detail on the general geomorphology of Bioko Island, and describe its flat top, apical graben-like structures, and the setting of the structural inventory created. Based on vent density and lineament mapping, we are able to identify volcanic rift zones that are governed by vent clustering and the asymmetry of associated monogenetic cones. Specifically, we find that eruption vents are not only clustered but aligned and follow the principal NE-SW axis, although we also highlight evidence for complex structures such as side-stepping alignments and en échelon patterns indicative of strike-slip contributions to the volcano-tectonic fabrics. We discuss possible volcano-tectonic and regional tectonic contributors, such as the Cameroon Volcanic Line and intersecting fracture zones, as well as gravity-tectonic processes dominant at Bioko Island. In this view, our results are relevant for understanding the past and recent volcanic activity and discuss the influence of regional and local volcano-tectonic architectures.
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Details
- Title
- Volcano-tectonic controls on the morphology and volcanic rift zone configuration on Bioko Island (Equatorial Guinea) derived from TanDEM-X data
- Creators
- Jacob Brauner (Corresponding Author) - Drexel University, Biodiversity, Earth, and Environmental Science (BEES)Thomas R. WalterOscar Ela - National University of Equatorial GuineaLoyc Vanderkluysen - Drexel University, Biodiversity, Earth, and Environmental Science (BEES)
- Publication Details
- Bulletin of volcanology, v 86(8), 76
- Publisher
- Springer Nature
- Number of pages
- 24
- Grant note
We acknowledge the provided datasets from the German Aerospace Center based on the proposal DEM_GEOL3419 to TRW. This work is part of the dissertation project of JB and the support of the Drexel University and the members of the dissertation committee is greatly appreciated. The authors thank the participants of the 2022 fieldwork campaign, namely Guillaume Boudoire and Christine R. Sealing, as well as partners from the Bioko Biodiversity Protection Program and the Universidad Nacional de Guinea Ecuatorial, namely David M. Montgomery, Maximiliano F. Mene, and Francisco M. Micha. We would also like to thank the two anonymous reviewers whose comments contributed significantly to the improvement of the manuscript.DAS:Original satellite data are available via DLR. All of our data, code, protocols, and in particular the maps are available at www.zenodo.org in the repository https://doi.org/10.5281/zenodo.11304183.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Biodiversity, Earth, and Environmental Science (BEES)
- Web of Science ID
- WOS:001283002700001
- Scopus ID
- 2-s2.0-85200390894
- Other Identifier
- 991021895615404721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Geosciences, Multidisciplinary