Browsing by Author "Cramez, Carlos"
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- Allochthonous salt, structure and stratigraphy of the north-eastern Gulf of Mexico. Part I: StratigraphyPublication . Wu, Shengyu; Vail, Peter R.; Cramez, CarlosMajor sequences boundaries associated with eustatic sea level changes are correlated to the general stratigraphy of the north-eastern Gulf of Mexico.
- Allochthonous salt, structure and stratigraphy of the north-eastern Gulf of Mexico. Part II: StructurePublication . Wu, Shengyu; Bally, Albert W.; Cramez, CarlosThe Kinematic evolution of allochthonous salt in the north-eastern Gulf of Mexico proceeds in three stages. (1) Since the Middle Jurassic deposition, the Louann Salt was loaded by sediments causing episodic basinwartd movement of the salt, ultimately leading to large concentrations of salt masses in a slope environment by the end of the Lower Cretaceous. (2) A regime of starved sedimentation during Late Cretaceous and Early Oligocene is responsible for the stabilization of these early salt accumulations. (3) With renewed rapid accumulation of sediments, during the Neogene and pliocene, extensive allochthonous salt tongues and shetts formed by gravity spreading within the younger sediments of the slope. Autochthonous salt,allochthonous salt and detached allochthonous salt are typical stages of evolution. Major down to the basin growth faults separate allochthonous salt sheets from their original feeder stocks. Extension along down to the basin master growth faults in compensated mainly by salt withdrawal and partly by basinward shortening.
- Atlantic Ocean OpeningPublication . Cramez, CarlosA new model for the opening of the Atlantic is proposed. Subaerial lava flows were emplaced since the breakup of the lithosphere till subaerial spreading centres became immersed. Twined evaporitic basins, with brines enriched by spilitisation of the basalt of the lava flows, developed in each side of the mid-oceanic ridge. The Iberia offshore, and probably also the Newfoundland offshore, had particular geologic histories. In northern area, the breakup took place in a deepwater environment, so SDRs were not developed. In Iberia offshore, an incipient Benioff subduction zone could be the chiefly responsible for the compressional tectonic regime that took place since Upper Miocene (?).
- Atlantic-Type Divergent MarginsPublication . Cramez, Carlos
- Atlas of typical deep water seismic linesPublication . Cramez, CarlosIn this atlas, commented tentative geological interpretations, mainly, of Canvas autotraces of worldwide typical deep water seismic lines are proposed. The Bally and Snelson’s (1980) sedimentary basin classification was adopted. Remind: (i) Rift-Type basins, Cratonic basins and Atlantic-type Divergent Margins are sedimentary basins not associated with the formation of Megasutures ; (ii) Episutural and Perisutural basins are associated with the formation of Megasutures ; (iii) Forearcs, foredeeps and Chinese-type basins are perisutural bsins, the firsts associated with B-type subduction zones, the second with A-type subduction zones and the thirds with tilted blocks, normally developed by megasutures but, where the subduction zone A is not evident ; (iv) Backarcs and non Atlantic-type divergent margins are episutural basins associated with B-type subduction zones, the firsts without oceanization behind the volcanic arc, the seconds with oceanization ; (v) Panonnian-type and Mediterranean-type basins are episutural basins associated with A-Type subduction zones, the firsts without oceanization and the seconds when there is breakup and oceanization of the underlying fold belt ; (vi) The Great Basin and Californian-type basins are episutural associated with significant strike slip faulting ; (vii) Fold belts are developed inside the megasutures in connection with A or B-type subduction zones.
- Basic principles in tectonicsPublication . Cramez, Carlos; Letouzey, Jean
- Basic principles of scientific seismic interpretationPublication . Cramez, Carlos
- Bassins sédimentaires & systèmes pétroliersPublication . Cramez, Carlos
- Campos Gigantes de Finales de los 80 Asociados con Subducción Tipo "A" en SuraméricaPublication . Cramez, Carlos
- Can the South Atlantic Opening Model be Applied to the India Margins?Publication . Cramez, Carlos; Talwani, Manik; Jackson, M. P. A.The presence of SDRs (seawrd dipping reflectors) on the regional lines around the Indian continent strongly suggest the breakup of the lithosphere and the onset of the sea-floor spreading were similar to those proposed and described for the South Atlantic, which, in fact, is quite similar to the opening of the North Atlantic.