Biomarkers in Source Rocks from Barreirinha Formation (Devonian): Distribution and Paleoenvironment Significance
AUTOR(ES)
Silva, Andrenilton F.; Barros, Artur L. C.; Sousa, Alek A. C.; Jarvie, Daniel M.; Calderón, Sebastian M.; Brito, Ailton S.; Nogueira, Afonso C. R.; Souza, Alexandre A. de; Lima, Sidney G. de
FONTE
Journal of the Brazilian Chemical Society
DATA DE PUBLICAÇÃO
2022
RESUMO
The Barreirinha Formation-Upper Devonian, is the main petroleum source rock of the Amazon Basin, deposited during the great Devonian Transgression, contributing to significant accumulations of organic matter (OM) in anoxic conditions, which allowed its preservation. The present work had the objective of characterizing the molecular composition of biomarkers in outcrops samples of the Barreirinha Formation, aiming to evaluate the paleoenvironment, thermal evolution, and the preservation of OM total organic carbon (TOC) and Rock-Eval pyrolysis indicate considerable amounts of immature OM deposited in a low oxygenation environment. Gas chromatography-mass spectrometry (GC-MS) and gas chromatography-tandem mass spectrometry (GC-MS/MS) data corroborate that the OM was deposited in a suboxic to the oxic environment and low salinity (absence or low relative abundance of β-carotane and gammacerane). 24-N-Propyl-cholestane was detected and identified by synthetic pattern co-injection. High concentrations of tetracyclic polyprenoids (TPPs) in ascending order from base to top, high hopane/sterane ratios, to suggest that the samples had a high molecular weight n-alkanes, C29 steranes, low thermal evolution, and anoxic depositional paleoenvironment.
Documentos Relacionados
- Mode of life of the macrofossils from the cabeças formation (Devonian), Parnaíba Basin, Brazil
- Source and significance of 5-nucleotidase in synovial fluid.
- Evaluation of biomarkers in plasma, blood, and urine samples from coke oven workers: significance of exposure to polycyclic aromatic hydrocarbons.
- Distribution and evolutionary significance of mitochondrial plasmids in Neurospora spp.
- AUX1 Promotes Lateral Root Formation by Facilitating Indole-3-Acetic Acid Distribution between Sink and Source Tissues in the Arabidopsis Seedling