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Contourite depositional systems offshore Madeira Island: Decoding the deepwater circulation since the Late Cretaceous to the Quaternary in the NE-Central Atlantic by C. Roque; J. Hernández-Molina; P. Brito; P. Madureira; R. Quartau; V. Magalhães; G. Carrara is a Earth and Planetary Sciences article available to read on EtoBox.
What is Contourite depositional systems offshore Madeira Island: Decoding the deepwater circulation since the Late Cretaceous to the Quaternary in the NE-Central Atlantic about?
There is still a great unawareness about the deep-water circulation in the NE-Central Atlantic since the Late Cretaceous. The morphology, sedimentary stacking pattern and distribution of contourite depositional systems have been widely used as paleoceanographic indicators, given clues about the relative velocity and pathways of bottom currents past-circulation. We present here evidence of a new contourite features developed in the NE-Central Atlantic offshore Madeira Island between ∼3000 m and ∼ 4950 m water depth. These features allowed us to define two Contourite Depositional Systems (CDSs). The dataset used in our work is composed of multichannel reflection seismic profiles and DSDP and ODP sites for the chronostratigraphic framework. The seismic stratigraphy analysis allowed the identification of six seismic units (U1–U6) and a sub-unit (U6a) separated by erosional discontinuities (D1–D6). The acoustic basement corresponds to oceanic crust located in the Cretaceous Magnetic Quite Zone (∼120 Ma to 84 Ma), but basalts drilled at DSDP Site 136 near Madeira Island, indicate an age of about 106 Ma. Sedimentary deposits from seismic units are interpreted as pelagic (unit U1; Early Cr
Who reads Contourite depositional systems offshore Madeira Island: Decoding the deepwater circulation since the Late Cretaceous to the Quaternary in the NE-Central Atlantic?
It is typically read by researchers, students, and practitioners in Earth and Planetary Sciences.
- Author
- C. Roque; J. Hernández-Molina; P. Brito; P. Madureira; R. Quartau; V. Magalhães; G. Carrara
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Earth and Planetary Sciences (Physical Sciences)