Palaeoredox conditions and sequence stratigraphy of the Cretaceous storm-dominated, mixed siliciclastic-carbonate ramp in the Eastern Cordillera Basin (Colombia): Evidence from sedimentary geochemical proxies and facies analysis

Simple item page
dc.contributor.authorRivera, Huber A.
dc.contributor.authorLe Roux, Jacobus P.
dc.contributor.authorSánchez, L. Katherine
dc.contributor.authorMariño-Martínez, Jorge E.
dc.contributor.authorSalazar, Christian
dc.contributor.authorBarragán, J. Carolina
dc.date.accessioned2022-05-31T20:56:07Z
dc.date.available2022-05-31T20:56:07Z
dc.date.issued2018
dc.description.abstractThe Cretaceous black shales of Colombia are among the most important successions in the north of South America and have attracted the attention of many geoscientists and exploration companies over the last few decades, because of their high hydrocarbon potential and the presence of emerald deposits. However, many uncertainties still remain with regard to their tectonic setting, sequence stratigraphy, depositional environments, palaeoxygenation conditions, and organic matter preservation. In order to develop a more integrated picture of these different processes and conditions, we conducted a detailed sedimentological, inorganic geochemical (U, V, Ni, Zn, Mn, Fe, Ti, Mo, Cu, Cr, Cd, Ba) and sequence stratigraphic analysis of the Cretaceous black shales in the Magdalena-Tablazo Sub-Basin (Eastern Cordillera Basin) of Colombia. Eleven lithofacies and five lithofacies associations of a storm-dominated, siliciclastic-carbonate ramp were identified, which range from basin to shallow inner ramp environments. These facies were grouped into six third-order stratigraphic sequences showing high-order cycles of marine transgression with constrained regressive pulses during the late Valanginian to early Coniacian. The black shales succession represents deposition under anoxic bottom water with some intervals representing dysoxic-suboxic conditions. The evolution of the sedimentary environments and their palaeoxygenation history reflect tectonic and eustatic sea-level controls that 1) produced a variable orientation and position of the coastline throughout the Cretaceous; 2) conditioned the low-gradient ramp geometry (b0.3°) and 3) modified the oxygenation conditions in the Magdalena-Tablazo Sub-Basin. An improved under- standing of the sedimentary setting during deposition of the Cretaceous black shales in the Magdalena-Tablazo Sub-Basin assists in highlighting the interplay between the mechanism of sedimentation and continuum anoxic conditions prevailing in a basin, as well the important role of nutrient input from continental runoff as a trigger of high productivity and extended anoxia conditions.es
dc.description.versionVersión Publicadaes
dc.identifier.citationuber A. Rivera, Jacobus P. Le Roux, L. Katherine Sánchez, Jorge E. Mariño-Martínez, Christian Salazar, J. Carolina Barragán, Palaeoredox conditions and sequence stratigraphy of the Cretaceous storm-dominated, mixed siliciclastic-carbonate ramp in the Eastern Cordillera Basin (Colombia): Evidence from sedimentary geochemical proxies and facies analysis, Sedimentary Geology, Volume 372, 2018, Pages 1-24, ISSN 0037-0738, https://doi.org/10.1016/j.sedgeo.2018.05.003.es
dc.identifier.urihttps://doi.org/10.1016/j.sedgeo.2018.05.003es
dc.identifier.urihttp://hdl.handle.net/11447/6165
dc.language.isoenes
dc.subjectSiliciclastic carbonate rampes
dc.subjectTempestiteses
dc.subjectRedox-sensitive elementses
dc.subjectPalaeoproductivityes
dc.subjectBlack shaleses
dc.titlePalaeoredox conditions and sequence stratigraphy of the Cretaceous storm-dominated, mixed siliciclastic-carbonate ramp in the Eastern Cordillera Basin (Colombia): Evidence from sedimentary geochemical proxies and facies analysises
dc.typeArticlees
dcterms.sourceSedimentary Geologyes

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Palaeoredox-conditions.pdf
Size:
13.19 MB
Format:
Adobe Portable Document Format
Description:
Texto completo
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Artículos Ingeniería

Implementado por OpenGeek Services