Thermal evolution of the Ordovician in the western margin of the East-European Platform: CAl and Ro data

Authors

  • Maria Nehring-Lefeld Polish Geological Institute, Rakowiecka 4, PL-00-975 Warszawa
  • Zdzisław Modliński Polish Geological Institute, Rakowiecka 4, PL-00-975 Warszawa
  • Elżbieta Swadowska Polish Geological Institute, Rakowiecka 4, PL-00-975 Warszawa

Abstract

Values of colour alteration index of conodonts (CAI), based on collections from Ordovician strata of 40 boreholes, have been established for the area of the pre-Vendian Platform in northeastern Poland and adjacent southwestern areas of younger consolidation. Changes of the CAI are shown on maps. Six zones of similar CAI values are distinguished. Their presumed ranges beyond the boundaries of Poland are outlined basing on data from the adjacent countries. A spatial distribution of paleotemperatures was achieved in this way yielding new data which may serve to interpret the thermal history of the Early Palaeozoic deposits in the western slope of the East-European Platform. The changes of CAI are correlated with the results of vitrinite reflectance measurements (Ro) from selected profiles.

Downloads

Published

2013-02-20

Issue

Vol. 41 No. 2 (1997)

Section

Articles

License

Authors who publish with this journal agree to the following terms:
  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as this can lead to productive exchanges and earlier and more frequent citation of the published work (See The Effect of Open Access).