Display options
Cite
Fabin CE, Correia Filho OJ, Alencar ML, et al. Stratigraphic Relations of the Ipubi Formation: Siliciclastic-Evaporitic Succession of the Araripe Basin. An Acad Bras Cienc. 2018;90(2):2049-2071doi: 10.1590/0001-3765201820170526.
Fabin, C. E., Correia Filho, O. J., Alencar, M. L., Barbosa, J. A., Miranda, T. S., Neumann, V. H., Gomes, I. F., & Santana, F. R. (2018). Stratigraphic Relations of the Ipubi Formation: Siliciclastic-Evaporitic Succession of the Araripe Basin. Anais da Academia Brasileira de Ciencias, 90(2), 2049-2071. https://doi.org/10.1590/0001-3765201820170526
Fabin, Carlos E, et al. "Stratigraphic Relations of the Ipubi Formation: Siliciclastic-Evaporitic Succession of the Araripe Basin." Anais da Academia Brasileira de Ciencias vol. 90,2 (2018): 2049-2071. doi: https://doi.org/10.1590/0001-3765201820170526
Fabin CE, Correia Filho OJ, Alencar ML, Barbosa JA, Miranda TS, Neumann VH, Gomes IF, Santana FR. Stratigraphic Relations of the Ipubi Formation: Siliciclastic-Evaporitic Succession of the Araripe Basin. An Acad Bras Cienc. 2018 Aug;90(2):2049-2071. doi: 10.1590/0001-3765201820170526. Epub 2018 Jun 25. PMID: 29947671.
Copy Download .nbib Format: NLM
Share it on

An Acad Bras Cienc. 2018 Aug;90(2):2049-2071. doi: 10.1590/0001-3765201820170526. Epub 2018 Jun 25.

Stratigraphic Relations of the Ipubi Formation: Siliciclastic-Evaporitic Succession of the Araripe Basin.

Anais da Academia Brasileira de Ciencias

Carlos E Fabin, Osvaldo J Correia Filho, Márcio L Alencar, José A Barbosa, Tiago S DE Miranda, Virgínio H Neumann, Igor F Gomes, Felipe R DE Santana

Affiliations

  1. Programa de Pós-Graduação em Geociências, Universidade Federal de Pernambuco, Avenida Acadêmico Hélio Ramos, s/n, Cidade Universitária, 50740-530 Recife, PE, Brazil.
  2. Laboratório de Geologia Sedimentar e Ambiental, Departamento de Geologia, Universidade Federal de Pernambuco, Avenida Acadêmico Hélio Ramos, s/n, Cidade Universitária, 50740-530 Recife, PE, Brazil.
  3. Laboratório de Métodos Computacionais em Geomecânica, Departamento de Engenharia Civil, Universidade Federal de Pernambuco, Avenida Acadêmico Hélio Ramos, s/n, Cidade Universitária, 50740-530 Recife, PE, Brazil.

PMID: 29947671 DOI: 10.1590/0001-3765201820170526

Abstract

The Ipubi Formation represents the Aptian-Albian siliciclastic-evaporitic succession of Araripe Basin, NE Brazil. This succession comprises siliciclastic rocks (bituminous shales and claystones) and evaporites (gypsum and secondary anhydrite) and represents part of the lacustrine-shallow marine post-rift phase I. This study used sequence stratigraphy concepts to define the relations between changes in the relative lake level and the formation of Ipubi deposits. Results show that the organic-rich shales of the Ipubi Formation formed during a transgressive pulse that covered large areas of the proximal domains. These deposits overlie a regional unconformity that marks the end of the deposition of the underlying Crato Formation. A High Stand stage that followed the transgression influenced the formation of evaporitic deposits. Climate conditions played a major role in influencing the triggering and stopping of evaporite deposition. Thus, a new relative lake level fall event caused the exposure of the Ipubi Formation deposits, and created another regional subaerial unconformity accompanied by widespread karstification of evaporite beds. A posterior transgression caused the deposition of siliciclastic rocks of the Romualdo Formation over the Ipubi Formation strata, and also promoted a new event of karstification of the Ipubi upper evaporite beds.

Publication Types