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Physico-chemical analysis of Albian (Lower Cretaceous) amber from San Just (Spain): implications for palaeoenvironmental and palaeoecological studies

Geologica acta, 2013, Vol.11 (3), p.359-370 [Peer Reviewed Journal]

(c) Dal Corso, J. et al., 2013 info:eu-repo/semantics/openAccess ;LICENCIA DE USO: Los documentos a texto completo incluidos en Dialnet son de acceso libre y propiedad de sus autores y/o editores. Por tanto, cualquier acto de reproducción, distribución, comunicación pública y/o transformación total o parcial requiere el consentimiento expreso y escrito de aquéllos. Cualquier enlace al texto completo de estos documentos deberá hacerse a través de la URL oficial de éstos en Dialnet. Más información: https://dialnet.unirioja.es/info/derechosOAI | INTELLECTUAL PROPERTY RIGHTS STATEMENT: Full text documents hosted by Dialnet are protected by copyright and/or related rights. This digital object is accessible without charge, but its use is subject to the licensing conditions set by its authors or editors. Unless expressly stated otherwise in the licensing conditions, you are free to linking, browsing, printing and making a copy for your own personal purposes. All other acts of reproduction and communication to the public are subject to the licensing conditions expressed by editors and authors and require consent from them. Any link to this document should be made using its official URL in Dialnet. More info: https://dialnet.unirioja.es/info/derechosOAI ;ISSN: 1695-6133 ;EISSN: 1696-5728 ;DOI: 10.1344/105.000001871

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  • Title:
    Physico-chemical analysis of Albian (Lower Cretaceous) amber from San Just (Spain): implications for palaeoenvironmental and palaeoecological studies
  • Author: Dal Corso, J. ; Roghi, G. ; Ragazzi, E. ; Angelini, I. ; Giaretta, A. ; Soriano, C. ; Delclòs Martínez, Xavier ; Jenkyns, H. C.
  • Subjects: Amber ; Ambre ; C-isotopes ; Cretaceous ; Espanya ; Infra-red spectroscopy ; Paleoclimatologia ; Paleoclimatology ; Paleoecologia ; Paleoecology ; Spain ; Thermogravimetric analyses
  • Is Part Of: Geologica acta, 2013, Vol.11 (3), p.359-370
  • Description: Amber from a Lower Cretaceous outcrop at San Just, located in the Eastern Iberian Peninsula (Escucha Formation, Maestrat Basin), was investigated to evaluate its physico-chemical properties. Thermogravimetric (TG) and Differential Thermogravimetric (DTG) analyses, infra-red spectroscopy, elemental and C-isotope analyses were performed. Physico-chemical differences between the internal light nuclei and the peripheral darker portions of San Just amber can be attributed to processes of diagenetic alteration that preferentially took place in the external amber border colonized by microorganisms (fungi or bacteria) when the resin was still liquid or slightly polymerized. δ13Camber values of different pieces of the same sample, from the nucleus to the external part, are remarkably homogeneous, as are δ13Camber values of the darker peripheral portions and lighter inner parts of the same samples. Hence, neither invasive microorganisms, nor diagenetic alteration changed the bulk isotopic composition of the amber. δ13C values of different amber samples range from -21.1‰ to -24‰, as expected for C3 plant-derived material. C-isotope analysis, coupled to palaeobotanical, TG and DTG data and infra-red spectra, suggests that San Just amber was exuded by only one conifer species, belonging to either the Cheirolepidiaceae or Aracauriaceae, coniferous families probably living under stable palaeoenvironmental and palaeoecological conditions.
  • Publisher: Universitat de Barcelona
  • Language: Catalan;English
  • Identifier: ISSN: 1695-6133
    EISSN: 1696-5728
    DOI: 10.1344/105.000001871
  • Source: Recercat
    DOAJ Directory of Open Access Journals
    Revistes Catalanes amb Accés Obert (RACO)
    Dialnet
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