Effects of superficial layers on coseismic displacements for a dip-slip fault and geophysical implications     

R. Cattin  P. Briole  H. Lyon-Caen  P. Bernard  & P. Pinettes 《Geophysical Journal International》1999,137(1):149-158

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Knowledge of the three French underground laboratory sites   总被引：1，自引：0，他引：1  

Patrick Lebon  Bernard Mouroux 《Engineering Geology》1999,52(3-4):251-256

From March 1994 to August 1996, ANDRA conducted a large reconnaissance work on three sites for possible underground research laboratories. These surveys highlighted for each site the presence of a geological formation, the properties of which meet the requirements of the French Fundamental Safety Rules. On the East site, the selected formation is a 130 m thick argillite layer. On the Gard site the layer is composed of close-packed siltites which are 200–400 m thick. On the Vienne site a hercynian granodiorite batholith was found under a 160 m thick jurassic overdurden.  相似文献   

The complex frequencies of long-period seismic events as probes of fluid composition beneath volcanoes   总被引：2，自引：0，他引：2  

Hiroyuki Kumagai  & Bernard A. Chouet 《Geophysical Journal International》1999,138(2):F7-F12

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On the small-scale fractal geometrical structure of a living coral reef barrier     

Damien Sous  Frédéric Bouchette  Erik Doerflinger  Samuel Meulé  Raphael Certain  Gwladys Toulemonde  Benjamin Dubarbier  Bernard Salvat 《地球表面变化过程与地形》2020,45(12):3042-3054

The topographical complexity of coral reefs is of primary importance for a number of hydrodynamical and ecological processes. The present study is based on a series of high-resolution seabottom elevation measurements along the Maupiti Barrier Reef, French Polynesia. Several statistical metrics and spectral analysis are used to characterize the spatial evolution of the coral geometrical structure from the reef crest to the backreef. A consistent fractal-like power law exists in the spectral density of bottom elevation for length scales between 0.1 and 7 m, while at larger scale, the reef structure shows a different pattern. Such a fine characterization of the reef geometrical structure provides key elements to reconstruct the reef history, to improve the representation of reef roughness in hydrodynamical models and to monitor the evolution of coral reef systems in the context of global change. © 2020 John Wiley & Sons, Ltd.  相似文献   

Laboratory Modeling of Aftershock Sequences: Stress Dependences of the Omori and Gutenberg–Richter Parameters     

Smirnov  V. B.  Ponomarev  A. V.  Stanchits  S. A.  Potanina  M. G.  Patonin  A. V.  Dresen  G.  Narteau  C.  Bernard  P.  Stroganova  S. M. 《Izvestiya Physics of the Solid Earth》2019,55(1):124-137

Izvestiya, Physics of the Solid Earth - Laboratory experiments on studying the aftershock regime are carried out on sandstone specimens at different levels of axial loading and uniform compression...  相似文献   

Better constrained selection of the Paleozoic West Gondwana (South America) paleomagnetic poles for the APWP determination     

Bernard Henry  Mohamed E. M. Derder  Mohamed Amenna  Said Maouche  Boualem Bayou 《Studia Geophysica et Geodaetica》2017,61(2):185-198

The reliability of an Apparent Polar Wander Path (APWP) obviously depends on the paleomagnetic poles used to determine it. The APWP of Africa and South America are fairly well defined for the 330–260 Ma interval. However, this study pointed out a moderate shift between these two curves, and an incoherency of the South American data, contrary to the African ones, which are homogeneous. A number of South American pole positions were re-evaluated in an effort to better constrain the APWP for the entire continent. Most of discarded poles correspond to sites at the area of the junction of Cordillera with the stable craton. That could have structural implications for the evolution of the western margin of the Gondwana. A new criterion for the evaluation of paleomagnetic poles reliability for APWP is presented. Based on comparison of data from different continents and labeled “coherence” criterion, it is independent from Van der Voo’s ones.  相似文献   

Active tectonics,seismicity and geomorphology with special reference to Normandy (France)     

Jean‐Louis Lagarde  Stphane Baize  Daniel Amorese  Bernard Delcaillau  Marianne Font  Philippe Volant 《第四纪科学杂志》2000,15(7):745-758

Integrated studies based on tectonic, seismotectonic and geomorphological analyses indicate that Normandy (northwest France) has been an active area during the Quaternary. Topography and landform discontinuities reflect the dislocation and differential uplift of a late Cenozoic platform. The tectonic activity is represented by (i) active faults, indicated by linear scarps and seismic activity, (ii) offsetting of pre‐existing surfaces, (iii) Plio‐Pleistocene sedimentation restricted within narrow subsiding zones, and (iv) morphometric properties of drainage basins that indicate zones of differential uplift. The inferred strain pattern involves (i) a shortening direction that strikes NW–SE as expected in the European context of Alpine compression, and (ii) a NE–SW trending extension accommodated by NW–SE normal faults. The geomorphological systems encountered in Normandy preferentially record differential vertical displacements. Copyright © 2000 John Wiley & Sons, Ltd.  相似文献   

Accelerated sediment delivery to continental margins during post-orogenic rebound of mountain ranges     

Thomas Bernard  Hugh D. Sinclair 《Basin Research》2023,35(2):642-661

Changes in sediment flux to continental margins are commonly interpreted in terms of tectonic growth of topography or climatic change. Here, we show that variations in sediment yield from orogenic systems, previously considered as resulting from climate change, drainage reorganisation or mantle processes can be explained by intrinsic mechanisms of mountain belt/foreland basin systems naturally evolving during post-orogenic decay. Numerical modelling indicates an increase of sediment flux leaving the orogenic system synchronous with the cessation of deposition in the foreland basin and the transition from late syn- to post-orogenesis. Experiments highlight the importance of lithospheric flexure that causes the post-orogenic isostatic rebound of the foreland basin. Erosion of the rebounding foreland basin combined with continued sediment flux from the thrust wedge drives an acceleration in sediment outflux towards continental margins. Sediment budget records in natural settings such as the Northern Pyrenees or Western European Alps also indicate accelerated post-orogenic sediment delivery to the Bay of Biscay and Rhône Delta respectively. These intrinsic processes that determine sediment yield to continental margins must be accounted for prior to consideration of additional external tectonic or climatic controls.  相似文献   

Late Tournaisian (Carboniferous) brachiopods from Mouydir (Central Sahara,Algeria)     

Bernard Mottequin  Marie Legrand‐Blain 《Geological Journal》2010,45(4):353-374

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Professor Robert M. Shackleton FRS (1909–2001)     

Bernard Elgey Leake 《Geological Journal》2003,38(2):107-108

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