Geomorpho-tectonic evolution of the Jamaican restraining bend

Domínguez-González, Leomaris; Andreani, Louis; Stanek, Klaus; Gloaguen, Richard

doi:10.1016/j.geomorph.2014.09.019

Cited by 26 publications

(8 citation statements)

References 53 publications

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“…In the Jamaica Passage area, no drilling data are available, making it difficult to provide an age for the uppermost folded unit, deposited during the activity of the EPGFZ [ Corbeau et al ., ]. Based on conventional field geology and the identification of local unconformities, the onset of activity of the EPGFZ is estimated to be middle Miocene to late Miocene [ Draper , ; Mann et al ., , ; James‐Williamson et al ., ; Domínguez‐González et al ., ] in Jamaica and early Miocene in Haiti [ Calmus , ]. A geodynamical reconstruction based on a synthesis of geological data provides a younger age of 7 Ma for the development of EPGFZ [ Leroy et al ., ].…”

Section: Discussionmentioning

confidence: 99%

How transpressive is the northern Caribbean plate boundary?

et al. 2016

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International audienceTranspressive deformation at the northern Caribbean plate boundary is accommodated mostly by two major strikeslipfaults, but the amount and location of accommodation of the compressional component of deformation is still debated.We collected marine geophysical data including multi-beam bathymetry and multichannel seismic reflection profiles alongthis plate boundary around Hispaniola, in the Jamaica Passage and in the Gulf of Gonâve. The data set allows us to imagethe offshore active strike-slip faults as well as the compressional structures. We confirm that the Enriquillo-Plantain-GardenFault Zone (EPGFZ) in the Jamaica Passage has a primary strike-slip motion, as indicated by active left-lateral strike-sliprelatedstructures, i.e.: restraining bend, asymmetrical basin, en echelon pressures ridges and horsetail splay. Based ontopographic cross-sections across the EPGFZ, we image a very limited compressional component, if any, for at least thewestern part of the Jamaica Passage. Toward the east of the Jamaica Passage, the fault trace becomes more complex and weidentify adjacent compressional structures. In the Gulf of Gonâve, distributed folding and thrust faulting of the most recentsediments indicate active pervasive compressional tectonics. Estimates of shortening in the Jamaica Passage and in the Gulfof Gonâve indicate an increase of the compressional component of deformation towards the east, which nonetheless remainsvery small compared to that inferred from block modelling based on GPS measurement

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Section: Discussionmentioning

confidence: 99%

How transpressive is the northern Caribbean plate boundary?

et al. 2016

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“…Inferences on the geologic evolution and development of landscape can be drawn from a wide variety of indices ( [38,39]). Morphometric indices can give important information on the surface expression of different rock types, which result in different morphologic landforms [40].…”

Section: Morphometric Analysismentioning

confidence: 99%

Remote Sensing Exploration of Nb-Ta-LREE-Enriched Carbonatite (Epembe/Namibia)

et al. 2016

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Abstract:On the example of the Epembe carbonatite-hosted Nb-Ta-LREE deposit, we demonstrate the use of hyperspectral reflectance data and geomorphic indicators for improving the accuracy of remote sensing exploration data of structurally-controlled critical raw material deposits. The results further show how exploration can benefit from a combination of expert knowledge and remotely-sensed relief, as well as imaging data. In the first stage, multi-source remote sensing data were used in lithological mapping based on Kohonen Self-Organizing Maps (SOM). We exemplify that morphological indices, such as Topographic Position Index (TPI), and spatial coordinates are crucial parameters to improve the accuracy of carbonate classification as much as 10%. The resulting lithological map shows the spatial distribution of the ridge forming carbonatite dyke, the fenitization zone, syenite plugs and mafic intrusions. In a second step, the internal zones of the carbonatite complex were identified using the Multi-Range Spectral Feature Fitting (MRSFF) algorithm and a specific decision tree. This approach allowed detecting potential enrichment zones characterized by an abundance of fluorapatite and pyroxene, as well as dolomite-carbonatite (beforsite). Cross-validation of the mineral map with field observations and radiometric data confirms the accuracy of the proposed method.

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“…However, results are difficult to interpret, as they point to broad domains that do not always coincide with mapped tectonic features. Both drainage network and surface analyses have been successfully used to evaluate active tectonics in areas subjected to high deformation rates (e.g., [16,[27][28][29]). However, only a few works were done in intra-plate settings or in areas with low deformation rates (e.g., [12,[30][31][32][33]).…”

Section: Introductionmentioning

confidence: 99%

DEM-Based Analysis of Interactions between Tectonics and Landscapes in the Ore Mountains and Eger Rift (East Germany and NW Czech Republic)

et al. 2014

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Tectonics modify the base-level of rivers and result in the progressive erosion of landscapes. We propose here a new method to classify landscapes according to their erosional stages. This method is based on the combination of two DEM-based geomorphic indices: the hypsometric integral, which highlights elevated surfaces, and surface roughness, which increases with the topographic elevation and the incision by the drainage network. The combination of these two indices allows one to produce a map of erosional discontinuities that can be easily compared with the known structural framework. In addition, this method can be easily implemented (e.g., in MATLAB) and provides a quick way to analyze regional-scale landscapes. We propose here an example of a region where this approach becomes extremely valuable: the Ore Mountains and adjacent regions. The lack of young stratigraphic markers prevents a detailed analysis of recent fault activity. However, discontinuities in mapped geomorphic indices coupled to the analysis of river longitudinal profiles suggest a tight relationship between erosional discontinuities and main tectonic lineaments.Remote Sens. 2014, 6 7972

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Geomorpho-tectonic evolution of the Jamaican restraining bend

Cited by 26 publications

References 53 publications

How transpressive is the northern Caribbean plate boundary?

How transpressive is the northern Caribbean plate boundary?

Remote Sensing Exploration of Nb-Ta-LREE-Enriched Carbonatite (Epembe/Namibia)

DEM-Based Analysis of Interactions between Tectonics and Landscapes in the Ore Mountains and Eger Rift (East Germany and NW Czech Republic)

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