Crustal balanced cross sections and post-Jurassic evolution of the Pyrenees

Conference · Mon Aug 01 04:00:00 EDT 1988 · AAPG Bull.; (United States)

OSTI ID:5718499

Desegaulx, P; Roure, F; Villien, A

The ECORS deep seismic profile shows constraints on the crustal geometry of the Pyrenees, from the Ebro basin to the Aquitaine including the axial zone. Both forelands are flexed toward the axis of the belt, whereas nappes are north verging in the north and south verging in the south, giving a superficial V-shape to the Pyrenees. At depth the Pyrenees are disymmetric. The lower Iberian crust plunges slightly northward underneath a wedge of the European lithosphere. This deforms the ancient plate boundary, with the north Pyrenean fault being cut by north-verging thrust planes. Different models have been tested to restore previous geometries of the Pyrenees. They imply about 100 km of shortening since the Late Cretaceous. Two initial configurations are discussed to account for the left slip of Iberia during the opening of the Bay of Biscaye, Albian pullapart basins, and Pyrenean metamorphism.

• Research Organization: Institut Francais du Petrole, Rueil-Malmaison (France)
• OSTI ID: 5718499
• Report Number(s): CONF-8809346-
• Conference Information: Journal Name: AAPG Bull.; (United States) Journal Volume: 72:8
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
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CRETACEOUS PERIOD
CROSS SECTIONS
DEVELOPING COUNTRIES
EUROPE
GEOLOGIC AGES
GEOLOGIC HISTORY
GEOLOGIC MODELS
GEOLOGIC STRUCTURES
GEOPHYSICAL SURVEYS
MESOZOIC ERA
METAMORPHISM
SEDIMENTARY BASINS
SEISMIC SURVEYS
SPAIN
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WESTERN EUROPE