The Brecy depocenter as part of a new northern Massif Central Carboniferous-Permian Basin (France)

被引:0
|
作者
Beccaletto, Laurent [1 ]
Bourquin, Sylvie [2 ]
机构
[1] Bur Rech Geol & Minieres, F-45060 Orleans, France
[2] Univ Rennes, CNRS, Geosci Rennes, UMR 6118, F-35000 Rennes, France
关键词
Late Carboniferous; Permian; Paris Basin; Deep well; Seismic interpretation; Regional correlation; SAAR-NAHE BASIN; LODEVE BASIN; EXTENSIONAL TECTONICS; MONTAGNE NOIRE; COAL-BASIN; EVOLUTION; WESTERN; COLLAPSE; CLIMATE; GERMANY;
D O I
10.5802/crgeos.246
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The reinterpretation of deep wells and the reprocessing and interpretation of 115 km of industrial seismic lines can be used to update the geometry, depositional environments and tectonic evolution of the Carboniferous-Permian Brecy depocenter (southwest Paris Basin). The presentday geometry of the Brecy depocenter is controlled by several eastward dipping normal faults, some of which possibly connected to deep detachments that were active during the late Carboniferous-Permian history. It is estimated that the maximum thickness of the Brecy depocenter is 3900 m. The filling provides evidence for a thick late Carboniferous-lower Permian syn-rift stage overlain by a thin post-rift stage, probably similar to the tectonic evolution of the northeastward basins in the Lorraine region of France and Germany and thus attributed to the lower-middle Permian. The facies generally characterize lake environments, with occurrences of sediment supply attributed to fluvial, alluvial fan and delta fan deposits. They mainly display a retrogradational-progradational pattern during the synrift stage, and a retrogradational pattern during the post-rift stage. The Brecy area was part of a larger late Variscan basin during the latest Carboniferous-early Permian times in the northernMassif Central region.
引用
收藏
页码:163 / 190
页数:28
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