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Early Cretaceous sedimentary and tectonic development of the Dauphinois Basin (SE France).
| Wilpshaar, M., Leereveld, H. and Visscher, H. | |
| 1997 | |
| Cretaceous Research, vol.18, pp.: 457-468Cretaceous Research, vol.18, pp.: 457-468 | |
| Early Cretaceous sedimentary and tectonic development of the Dauphinois Basin (SE France). |
Wilpshaar, M., Leereveld, H. and Visscher, H. Early Cretaceous sedimentary and tectonic development of the Dauphinois Basin (SE France). Cretaceous Research (1997) vol.18, pp.: 457-468 A subsidence analysis is applied to two Valanginian-Albian composite columns of the Dauphinois Basin (SE France); one for the deeper part of the Dauphinois Basin (Vocontian Basin) and one for its marginal setting (Vercors Area). Within the Valanginian-Albian interval of both sequences, three phases of subsidence are recognized: (1) a Valanginian-Hauterivian phase characterized by relatively uniform tectonic subsidence patterns; (2) a Barremian-Gargasian phase characterized by profound shifts in subsidence; (3) a Clansayesian-Albian phase characterized by relatively small rates of tectonic subsidence or uplift. The Barremian-Gargasian phase can be further subdivided in three subphases viz. (1) uplift during the Early Barremian; (2) subsidence during the Late Barremian to early Bedoulian; (3) virtually no subsidence of the Vercors Area and subsidence of the Vocontian Basin during the late Bedoulian to Gargasian. This Barremian-Gargasian phase is related to compressional stress built up as a result of the changing tectonic regime of the Piemonte-Ligurian Ocean from extension to compression. As a consequence the Barremian-Gargasian tectonic phase forced the onset, progradation and eventual disappearance of extensive carbonate platforms at the margin of the Dauphinois Basin. It implies that these carbonate platforms document the very first sedimentary response to the changing tectonic regime. Vertical motions induced by such a changing tectonic regime in particular determine the regional sea-level curves established for these carbonate platforms and related basinal facies rather than global sea-level changes.