Basin Dynamics Research Papers - Academia.edu (original) (raw)

The methodological and practical issues in respect of assessment of the flood-plain and stream-way complex of the Berezhnytsya river are presented in the article. Researched river is one of the Ukrainian Carpathians minor rivers and... more

The methodological and practical issues in respect of assessment of the flood-plain and stream-way complex of the Berezhnytsya river are presented in the article. Researched river is one of the Ukrainian Carpathians minor rivers and constituted the right-bank tributary of the Dniester river. The presented study typify the stream-way segments. Furthermore were shown identification of the reasons of decreasing the qualitative characteristics of the Berezhnytsya flood-plain and stream-way complex. The set of works to stop processes that are destructive for the river and its ecosystem should be made.

The formation of rifted continental margins has long been explained by numerous physical models. However, field observations are still lacking to validate or constrain these models. This study presents major new observations on the broad... more

The formation of rifted continental margins has long been explained by numerous physical models. However, field observations are still lacking to validate or constrain these models. This study presents major new observations on the broad continental margin of the Gulf of Lions, based on a large amount of varied data. Two contrasting regions characterize the thinned continental crust of this

Though the late Miocene “Messinian Salinity Crisis” has been intensely researched along the circum-Mediterranean basins, few studies have focused on the central part of the Mediterranean Basin and, especially, the pre-salt deposits. To... more

Though the late Miocene “Messinian Salinity Crisis” has been intensely researched along the circum-Mediterranean basins, few studies have focused on the central part of the Mediterranean Basin and, especially, the pre-salt deposits. To improve our knowledge of the Messinian events, it is imperative to better understand this domain. In this study, we provide a more complete understanding of this central domain in the Provence Basin. We were able to recognize: a) thick marine detrital series (up to 1000 m) derived from the Messinian subaerial erosion which is partly prolongated in the distal part by b) a thick unit of deep marine deposits (up to 800 m) prior to the evaporites; c) a thick presumed alternation of detritals and evaporites (1500 m) below the mobile halite; and d) a two-step transgression at the end of the Messinian. Spatially, we document the eroded shelf to the deep basin (and from the western to the eastern parts of the Gulf of Lions), and temporally, we extend the inte...

Two-dimensional pre-stack depth migrated seismic reflection data, gravity and velocity models are used to assess the nature and origin of a prominent, buried ridge, the Porcupine Median Volcanic Ridge (PMVR) within the Porcupine Basin,... more

Two-dimensional pre-stack depth migrated seismic reflection data, gravity and velocity models are used to assess the nature and origin of a prominent, buried ridge, the Porcupine Median Volcanic Ridge (PMVR) within the Porcupine Basin, offshore Ireland. The debate on the origin of the PMVR during the past 30 years has followed the evolution of the concept of continental margin genesis. In this paper, the origin of the ridge is evaluated on the basis of the internal geometry and velocity structure, revealed by the seismic data. Implication of the presence of these type of ridges in hyper-extensional rifted margins is discussed and compared with other margins. The analysis indicates that the ridge is an extrusive volcanic ridge, probably tholeiitic in composition, constructed by stacked hyaloclastite deltas and topped by carbonate platforms. The results invalidate previously proposed models involving highly rotated fault blocks and the serpentinite mud volcanism. The extension magnitude analysis suggests a highly stretched setting where limited mantle serpentinization may have occurred, but the architecture and velocity of the PMVR demonstrates that it is made of lower velocity materials than serpentinite. During the opening of the North Atlantic, the PMVR represents the northern time-equivalent magmatic event expressed along the Newfoundland-Iberia-Galicia, recorded by the J anomaly that originate from Cretaceous volcanic deposits.

The formation of rifted continental margins has long been explained by numerous physical models. However, field observations are still lacking to validate or constrain these models. This study presents major new observations on the broad... more

The formation of rifted continental margins has long been explained by numerous physical models. However, field observations are still lacking to validate or constrain these models. This study presents major new observations on the broad continental margin of the Gulf of Lions, based on a large amount of varied data. Two contrasting regions characterize the thinned continental crust of this margin. One of these regions corresponds to a narrow rift zone (40–50 km wide) that was highly thinned and stretched during rifting. In contrast with this domain, a large part of the margin subsided slowly during rifting and then rapidly after rifting. The thinning of this domain cannot be explained by stretching of the upper crust. We can thus recognize a zonation of the stretching in both time and space. In addition, the Provencal Basin is characterized by a segmentation of the order of 100–150 km. These observations have important consequences on the formation and evolution of the Gulf of Lions margin. Independently of the geodynamic context, we can propose some general features that characterize the formation of rifted continental margins.

Terra Nova, 23, 11–18, 2011Terra Nova, 23, 11–18, 2011AbstractAn investigation into the sedimentation pattern along the Dhofar margin allows us to describe its late-stage evolution. After the accumulation of a thick post-rift sedimentary... more

Terra Nova, 23, 11–18, 2011Terra Nova, 23, 11–18, 2011AbstractAn investigation into the sedimentation pattern along the Dhofar margin allows us to describe its late-stage evolution. After the accumulation of a thick post-rift sedimentary succession, two units characterized by mass transport deposits (MTD) mark a major change in sedimentation. The first MTD occurrence could be the result of a climatic change. The second MTD occurrence is associated with a shift of sedimentation from the slope towards the basin. An uplift phase, characterized by two distinct deformational styles in the eastern and western parts of the Dhofar margin, can be highlighted. Both events occurred very late in the history of the margin, at least 7.6 Ma after the end of the rifting phase (35–17.6 Ma). The evolution of this basin stresses the importance of post-rift deformation in the Dhofar margin.An investigation into the sedimentation pattern along the Dhofar margin allows us to describe its late-stage evolution. After the accumulation of a thick post-rift sedimentary succession, two units characterized by mass transport deposits (MTD) mark a major change in sedimentation. The first MTD occurrence could be the result of a climatic change. The second MTD occurrence is associated with a shift of sedimentation from the slope towards the basin. An uplift phase, characterized by two distinct deformational styles in the eastern and western parts of the Dhofar margin, can be highlighted. Both events occurred very late in the history of the margin, at least 7.6 Ma after the end of the rifting phase (35–17.6 Ma). The evolution of this basin stresses the importance of post-rift deformation in the Dhofar margin.

The methodological and practical issues in respect of assessment of the flood-plain and stream-way complex of<br> the Berezhnytsya river are presented in the article. Researched river is one of the Ukrainian Carpathians minor rivers... more

The methodological and practical issues in respect of assessment of the flood-plain and stream-way complex of<br> the Berezhnytsya river are presented in the article. Researched river is one of the Ukrainian Carpathians minor rivers and<br> constituted the right-bank tributary of the Dniester river. The presented study typify the stream-way segments. Furthermore<br> were shown identification of the reasons of decreasing the qualitative characteristics of the Berezhnytsya flood-plain<br> and stream-way complex. The set of works to stop processes that are destructive for the river and its ecosystem should be<br> made.

Terra Nova, 23, 11–18, 2011Terra Nova, 23, 11–18, 2011AbstractAn investigation into the sedimentation pattern along the Dhofar margin allows us to describe its late-stage evolution. After the accumulation of a thick post-rift sedimentary... more

Terra Nova, 23, 11–18, 2011Terra Nova, 23, 11–18, 2011AbstractAn investigation into the sedimentation pattern along the Dhofar margin allows us to describe its late-stage evolution. After the accumulation of a thick post-rift sedimentary succession, two units characterized by mass transport deposits (MTD) mark a major change in sedimentation. The first MTD occurrence could be the result of a climatic change. The second MTD occurrence is associated with a shift of sedimentation from the slope towards the basin. An uplift phase, characterized by two distinct deformational styles in the eastern and western parts of the Dhofar margin, can be highlighted. Both events occurred very late in the history of the margin, at least 7.6 Ma after the end of the rifting phase (35–17.6 Ma). The evolution of this basin stresses the importance of post-rift deformation in the Dhofar margin.An investigation into the sedimentation pattern along the Dhofar margin allows us to describe its late-stage evolu...