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Geomorphology and geological controls of an active paraglacial rockslide in the New Zealand Southern Alps

Title data

Cody, Emma ; Draebing, Daniel ; McColl, Samuel ; Cook, Simon ; Brideau, Marc-Andre:
Geomorphology and geological controls of an active paraglacial rockslide in the New Zealand Southern Alps.
In: Landslides. (2019) .
ISSN 1612-5118
DOI: https://doi.org/10.1007/s10346-019-01316-2

Official URL: Volltext

Project information

Project title:
Project's official titleProject's id
Predicting the effects of climate change on alpine rock slopes: Evaluation of paraglacial and periglacial drivers of rockfall in the European AlpsNo information

Project financing: Massey University Research Grant (MR19350) Brian Mason Trust (2017/24) Deutsche Forschungsgemeinschaft (DR 1070/1-1)

Abstract in another language

Geological structures precondition hillslope stability as well as the processes and landslide mechanisms which develop in response to deglaciation. In areas experiencing glacier retreat and debuttressing, identifying landslide preconditions is fundamental for anticipating landslide development. Herein, the ~ 150 M m3 Mueller Rockslide in Aoraki/Mount Cook National Park, New Zealand, is described; and we document how preconditions have controlled its morphology and development in response to thinning of the adjacent Mueller Glacier. A combination of geomorphological and geotechnical mapping---based on field, geophysical and remote sensing data---was used to characterise the rock mass and morphology of the rockslide and surrounding hillslope. Mueller Rockslide is identified as a rock compound slide, undergoing dominantly translational failure on a dip slope. The crown of the rockslide is bounded by several discontinuous, stepped scarps whose orientation is controlled by joint sets; these scarps form a zone of toppling that is delivering rock debris to the main rockslide body. Surface and subsurface discontinuity mapping above the crown identified numerous joints, fractures and several scarps that may facilitate continued retrogressive enlargement of the rockslide. The presence of lateral release structures, debuttressing of the rockslide toe and steeply dipping bedding suggest that the rockslide may be capable of evolving to a rapid failure.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Paraglacial; Rockslide; Landslide preconditions; UAV; Natural hazard
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Geomorphology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Geomorphology > Chair Geomorphology - Univ.-Prof. Dr. Oliver Sass
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 550 Earth sciences, geology
Date Deposited: 05 Dec 2019 11:26
Last Modified: 05 Dec 2019 11:26
URI: https://eref.uni-bayreuth.de/id/eprint/53489