Publication Date:
2023-12-09
Description:
Abstract
Description:
This data set includes videos depicting the surface evolution (time-lapse photography, topography data and Digital Image Correlation [DIC] analysis) of 11 analogue models, divided in three model series (A, B and C), simulating rifting and subsequent inversion tectonics. In these models we test how orthogonal or oblique extension, followed by either orthogonal or oblique compression, as well as syn-rift sedimentation, influenced the reactivation of rift structures and the development of new inversion structures. We compare these models with an intracontinental inverted basin in NE Brazil (Araripe Basin). All experiments were performed at the Tectonic Modelling Laboratory of the University of Bern (UB).
We used an experimental set-up involving two long mobile sidewalls, two rubber sidewalls (fixed between the mobile walls, closing the short model ends), and a mobile and a fixed base plate. We positioned a 5 cm high block consisting of an intercalation of foam (1 cm thick) and Plexiglas (0.5 cm thick) bars on the top of the base plates. Then we added layers of viscous and brittle analogue materials representing the ductile and brittle lower and upper crust in our experiments, which were 3 cm and 6 cm thick, respectively. A seed made of the same viscous material was positioned at the base of the brittle layer, in order to localize the formation of an initial graben in our models. The standard model deformation rate was 20 mm/h, over a duration of 2 hours for a total of 40 mm of divergence, followed by 2 hours of convergence at the same rate (except for Models B3 and C3, since the oblique rifting did not create space for 40 mm of orthogonal inversion). For syn-rift sedimentation, we applied an intercalation of feldspar and quartz sand in the graben. Model parameters and detailed description of model set-up are summarized in Table 1, and results and their interpretation can be found in Richetti et al. (2023).
Keywords:
Basin inversion
;
EPOS
;
multi-scale laboratories
;
analogue models of geologic processes
;
analogue modelling results
;
Digital Image Correlation (DIC) / Particle Image Velocimetry (PIV)
;
earth interior setting 〉 crust setting 〉 continental-crustal setting
;
EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 PLATE TECTONICS 〉 CRUSTAL MOTION 〉 CRUSTAL MOTION DIRECTION
;
EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 PLATE TECTONICS 〉 FAULT MOVEMENT 〉 FAULT MOVEMENT DIRECTION
;
EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 PLATE TECTONICS 〉 FAULT MOVEMENT 〉 FAULT MOVEMENT RATE
;
EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 PLATE TECTONICS 〉 LITHOSPHERIC PLATE MOTION 〉 PLATE MOTION DIRECTION
;
EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 PLATE TECTONICS 〉 STRAIN
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Electric engine (mm/hr)
;
fault 〉 reverse fault
;
fault 〉 strike-slip fault
;
Generic camera
;
graben
;
graben
;
horst
;
normal fault
;
rift valley
;
rifting
;
Sand 〉 Corundum Sand
;
Sand 〉 Feldspar Sand
;
Sand 〉 Quartz Sand
;
Sandbox 〉 Sandbox (cm scale)
;
Sectioning
;
sedimentary process
;
Silicon/Silly putty/PDMS
;
SLR camera
;
StereoScan (Agisoft)
;
Surface image
;
tectonic and structural features
;
tectonic setting 〉 extended terrane setting 〉 continental rift setting
;
tectonic setting 〉 intraplate tectonic setting
;
tectonic uplift
;
thrust fault
Type:
Dataset
,
Dataset
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