El registro del Evento Anóxico Oceánico del Aptiense inferior (OAE 1a) en la sección de Carbonero (Subbético, sur de España)estratigrafía de isótopos de carbono, biomarcadores y composición elemental

  1. J.M. Castro 1
  2. S. Froehner 2
  3. R. Aguado 1
  4. G.A. de Gea 1
  5. M.L. Quijano 1
  6. B.D.A. Naafs 3
  7. R.D. Pancost 3
  1. 1 Universidad de Jaén
    info

    Universidad de Jaén

    Jaén, España

    ROR https://ror.org/0122p5f64

  2. 2 Universidade Federal de Santa Catarina
    info

    Universidade Federal de Santa Catarina

    Florianópolis, Brasil

    ROR https://ror.org/041akq887

  3. 3 University of Bristol
    info

    University of Bristol

    Brístol, Reino Unido

    ROR https://ror.org/0524sp257

Erakutsi afiliazioak +
Aldizkaria:
Geotemas (Madrid)

ISSN: 1576-5172

Argitalpen urtea: 2016

Zenbakien izenburua: IX CONGRESO GEOLÓGICO DE ESPAÑA

Zenbakia: 16

Orrialdeak: 201-204

Mota: Artikulua

DIALNET GOOGLE SCHOLAR lock_openSarbide irekia editor

Beste argitalpen batzuk: Geotemas (Madrid)

Laburpena

The early Aptian Oceanic Anoxic Event (OAE 1a) represents a major perturbation in the global carbon cycle and is linked to environmental, biotic and sedimentary changes. The signature of this event is a global positive 13C excursion, associated with widespread deposition of organic-rich marine sediments. This study presents the stratigrahic and geochemical characterization of an expanded pelagic marine section from the western Tethys. A multiproxy approach, including C-isotope stratigraphy, biomarkers and elemental geochemistry has been carried out. Our results reveal that the previously defined C-isotope segments 2 to 7 are clearly recorded in the studied section. The biomarker study has revealed that organic matter is thermally mature, mainly composed of marine organic matter. The biomarker association along with redox-sensitive trace elements suggest that sedimentation took place under generally well oxygenated waters only punctuated by short episodes of anoxia/dysoxia in a general context of increased primary marine productivity. Our results suggest that a high primary productivity was the main control on the deposition of organic-rich sediments during OEA 1a in the studied section.

Datuen iturria: Dialnet