Where Andean Subduction margin
Atacama Desert North Chile Scales Time: 5 Myrs
Space: 700 km x 150 km Techniques Geomorphological and geological mapping
Topographic data and satellite imagery analyses River drainage extraction and analysis Numerical landscape evolution modeling Results Geomorphic threshold controlled by precipitation distribution
Drainage incision is controlled by tectonic uplift over the last 5 Myrs The andean orogen is growing westwards Publications Coudurier-Curveur A, Lacassin R, Armijo R., 2015.
Andean growth and monsoon winds drive landscape evolution at SW margin of South America. Earth and Planetary Science Letters. 414:87-99. Armijo R. , Lacassin R,, Coudurier-Curveur A, Carrizo D. 2015 Coupled tectonic evolution of Andean orogeny and global climate, Earth-Science Reviews 143 (2015): 1-35. |
Andean Subduction margin, North Chile. (a) Topography, (b) rainfall pattern, (c) working hypothesis showing canyon incision is driven primarily by uniform uplift and secondarily by rainfall gradient over the northern margin. Coudurier Curveur et al., EPSL, 2015
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Where Assam, NE India
Arakan Plate Boundary, Bangladesh Himalayan foothills, Central Nepal Scales Time: 100 to 1000 yrs
Space: m to 100 kms Techniques Quantitative geomorphology,
Paleoseismology, Topographic data acquisition Rock sampling for 14C and 10Be dating methods Results The 1950 Assam earthquake has ruptured 2 sub- orthogonal thrust planes
We identified and characterised a >200 km long surface rupture for that earthquake Similar M8+ earthquakes seems to occur every 1500 to 2000 yrs Publications Coudurier-Curveur, A., Tapponnier, P., Okal, E., van der Woerd, J., Kali, E., Choudhury, S., Baruah S., Etchebes, M.,
Karakas, C. , 2019, A composite rupture model for the great 1950 Assam earthquake across the cusp of the Eastern Himalayan Syntaxis, EPSL. Coudurier-Curveur, A., Kali, E., Tapponnier, P. Karakas C., Baruah S., Choudhury S., Ildefonso S, van der Woerd J., Repetitive great earthquakes shape the landscape of the Eastern Himalayan Syntaxis over the last 9 ky., in prep |
Eastern Himalayan Syntaxis and context of the study
Topographic survey in the field, surrounded by curious children
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Where Bali, Indonesia
South East Asia Scales Time: 100 to 1000 yrs
Space: m to 1 kms Techniques ROI-based processing (Region Of Interest)
Satellite images analysis Aerial photographs Results In Bali, the cooperative management of rice terraces extends beyond villages to whole watersheds.
We show how cooperation can propagate from pairs of individuals to extended groups, creating a resilient system of bottom-up management Publications Lansing J. S., Thurner S., Ning Ning Chung, Coudurier
Curveur A., Karakas C., Fesenmyer K.A and Lock Yue Chew, Adaptive self-organization of Bali’s ancient rice terraces, Proceedings of the National Academy of Sciences, 114(25), 6504–6509, 2017 |
Bali Island, Indonesia and sites of the study
ROI classification of rice paddies in Mengwi
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Where Wharton Basin
Indian Ocean Scales Time: 10 yrs to 1 kyrs
Space: 100 m to 100 kms Techniques Bathymetric analyses
Topographic stacks Results One of the reactivated Fracture Zones (FZ) in the Wharton Basin displays 60 well-
developed pull-apart basins which record vertical and horizontal deformation over the last 2 Ma. The estimated slip rate along F6a is comparable to those identified along world- wide plate boundaries suggesting that this FZ could be a nascent plate boundary thus challenging our understanding of oceanic plate tectonics. Publications Coudurier Curveur A., Ç. Karakaş, S. Singh, P.
Tapponnier, H. Carton and N. Hananto. Is There a Nascent Plate Boundary in the Northern Indian Ocean? Geophysical Research Letters, 47, 2020 https://doi.org/10.1029/2020GL087362 |
View of the detailed bathymetry of the Wharton Basin acquired during the MIRAGE experiment (S. Singh)
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