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Bosiljka Glumac - Projects

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Stratigraphy and Geodynamic Context of Cretaceous Deposits in NE Adriatic Region
Project type: Ministry of Science, Education and Sports
Project ID: 181-1191152-2697

Project description:
A review of recent scientific literature reveals opposing interpretations of the geologic evolution of the northeastern Adriatic region. This reflects the complexity of the geologic history of the External Dinarides and NE part of the Adriatic foreland. Even though the present-day geomorphologic and structural makeup of the region was shaped by relatively recent geological processes, the understanding of its complex geologic history is dependent on reconstructing the succession of all events within the framework of regional geodynamic evolution. The pronounced lateral facies differentiation of Upper Cretaceous carbonates reflects synsedimentary processes, while recent position of certain formations implies vigorous post-Cretaceous geodynamic. Thus, understanding the stratigraphy and lateral distribution of these deposits is crucial for reconstructing the regional geologic evolution of this area. Recent dating of selected stratigraphic horizons using strontium isotopes provided better correlation between the Upper Cretaceous shallow-water carbonate deposits from this area and coeval globally deposited strata. The results indicate the need to revise traditional biostratigraphic interpretations of Upper Cretaceous deposits from the greater Adriatic region. Such revision should include compilation of information on stratigraphic ranges of micro- and macrofossils. Further application of strontium isotopes will provide better regional correlation and the establishment of a better chronostratigraphic framework for stratigraphic ranges of rudists and benthic foraminifera, and for a comparison with relevant ranges of planktonic foraminifera. Stable isotopes, especially of carbon and oxygen, are a useful correlation tool for certain Cretaceous horizons globally. Analysis of the isotopic record for selected successions of strata from the study area will allow for a better understanding of the deposition of these strata in relationship to some specific regional to global geologic events. Economic and societal benefits from the investigations are primarily reflected in making predictions about the distribution of petroleum-prospective strata in the subsurface. Such predictions serve as a basis for focused petroleum exploration of the Adriatic region. New lithostratigraphic units will be basic elements for construction of new lithostratigraphic map as a necessary first step in a meaningful managing with natural resources and environmental protection in the region.

Project head: Tvrtko Korbar

Institution: Hrvatski geološki institut
Duration: 2007 - danas