TY - JOUR
T1 - Structural control and geochronology of Cretaceous carbonate breccia pipes, Crato Formation, Araripe Basin, NE Brazil
AU - Celestino, Maria Alcione Lima
AU - Miranda, Tiago Siqueira
AU - Mariano, Gorki
AU - Alencar, Marcio Lima
AU - Buckman, Jim
AU - Roberts, Nick M. W.
AU - Barbosa, José Antonio
AU - Neumann, Virginio H. M. L.
AU - Braz Souza, Jorge André
AU - Roemers-Oliveira, Eduardo
N1 - Funding Information:
We thank the Editor Nicolas E. Beaudoin, the reviewer Geoffrey Motte and the three anonymous reviewers for their suggestions, which improved the early version of this manuscript. We thank Petrobras, the National Petroleum Agency, Natural Gas and Biofuels of Brazil (ANP), which financed the Pseudopoços Project - Petrobras/Federal University of Pernambuco (UFPE). We are grateful to the Department of Geology UFPE and Geolab who prepared all the samples that served as the basis for this research. We thank the Institute for GeoEnergy Engineering, Heriot-Watt University and the Geochronology and Tracers Facility, British Geological Survey for their assistance in the analyzes carried out. We thank Casa da Pedra – UFRJ , located in Satana do Cariri, CE, which provided crucial logistic support to fieldwork. This work is part of a MSc of Maria Alcione under the postgraduate program in Geosciences of the Federal University of Pernambuco (PPGEOC- UFPE) and represents the contribution N. 03 of the Laboratório de Modelagem de Bacias (ModLad-UFPE).
Funding Information:
We thank the Editor Nicolas E. Beaudoin, the reviewer Geoffrey Motte and the three anonymous reviewers for their suggestions, which improved the early version of this manuscript. We thank Petrobras, the National Petroleum Agency, Natural Gas and Biofuels of Brazil (ANP), which financed the Pseudopo?os Project - Petrobras/Federal University of Pernambuco (UFPE). We are grateful to the Department of Geology UFPE and Geolab who prepared all the samples that served as the basis for this research. We thank the Institute for GeoEnergy Engineering, Heriot-Watt University and the Geochronology and Tracers Facility, British Geological Survey for their assistance in the analyzes carried out. We thank Casa da Pedra ? UFRJ, located in Satana do Cariri, CE, which provided crucial logistic support to fieldwork. This work is part of a MSc of Maria Alcione under the postgraduate program in Geosciences of the Federal University of Pernambuco (PPGEOC- UFPE) and represents the contribution N. 03 of the Laborat?rio de Modelagem de Bacias (ModLad-UFPE).
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/10
Y1 - 2021/10
N2 - The laminated limestones of the Crato Formation, Araripe Basin (NE of Brazil) have been investigated, as they are analogous to facies of the carbonate reservoirs of the pre-salt sequence of the Brazilian marginal basins. The Early Cretaceous Crato laminites comprise a complex range of structures that may play an important role in the porosity and permeability distribution in carbonate reservoirs. This work aims to (1) understand the control of a boundary fault zone (the Triunfo Fault, Lower Cretaceous) on the development in carbonate breccia pipes of the Crato Formation, and (2) constrain the timing of brittle deformation, based on field observations, microstructural investigation and U–Pb carbonate geochronology. The breccia pipes are observed surrounding both normal and strike-slip faults. The brittle deformation superimposed on the pipes is characterized by brecciation and veining that show multiples phases of mineralization. Our results propose the circulation of fluid along the pre-existing faults and pipes, these fluids are responsible for polyphasic deformation in the pipes. We report two U–Pb ages from carbonate-vein mineralization of 94.9 ± 3.8 Ma (Cenomanian to Turonian) and 80.2 ± 3.0 Ma (2σ) (Campanian), which provide time constraints on the brittle reactivations of the Triunfo Fault Zone, during the post-rift phase of the Araripe Basin.
AB - The laminated limestones of the Crato Formation, Araripe Basin (NE of Brazil) have been investigated, as they are analogous to facies of the carbonate reservoirs of the pre-salt sequence of the Brazilian marginal basins. The Early Cretaceous Crato laminites comprise a complex range of structures that may play an important role in the porosity and permeability distribution in carbonate reservoirs. This work aims to (1) understand the control of a boundary fault zone (the Triunfo Fault, Lower Cretaceous) on the development in carbonate breccia pipes of the Crato Formation, and (2) constrain the timing of brittle deformation, based on field observations, microstructural investigation and U–Pb carbonate geochronology. The breccia pipes are observed surrounding both normal and strike-slip faults. The brittle deformation superimposed on the pipes is characterized by brecciation and veining that show multiples phases of mineralization. Our results propose the circulation of fluid along the pre-existing faults and pipes, these fluids are responsible for polyphasic deformation in the pipes. We report two U–Pb ages from carbonate-vein mineralization of 94.9 ± 3.8 Ma (Cenomanian to Turonian) and 80.2 ± 3.0 Ma (2σ) (Campanian), which provide time constraints on the brittle reactivations of the Triunfo Fault Zone, during the post-rift phase of the Araripe Basin.
KW - Araripe basin
KW - Breccia pipe
KW - Dolomitization
KW - Fault reactivation
KW - U–Pb geochronology
UR - http://www.scopus.com/inward/record.url?scp=85108340805&partnerID=8YFLogxK
U2 - 10.1016/j.marpetgeo.2021.105190
DO - 10.1016/j.marpetgeo.2021.105190
M3 - Article
AN - SCOPUS:85108340805
SN - 0264-8172
VL - 132
JO - Marine and Petroleum Geology
JF - Marine and Petroleum Geology
M1 - 105190
ER -