Lower–Middle Jurassic facies patterns in the NW Afghan–Tajik Basin of southern Uzbekistan and their geodynamic context
| Autor: | Franz T. Fürsich, Marie-Françoise Brunet, Jean-Luc Auxietre, Hermann Munsch |
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| Přispěvatelé: | Fachgruppe PaläoUmwelt, GeoZentrum Nordbayern, Friedrich-Alexander Universität Erlangen-Nürnberg (FAU)-Friedrich-Alexander Universität Erlangen-Nürnberg (FAU), Institut des Sciences de la Terre de Paris (iSTeP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), TOTAL S.A. |
| Rok vydání: | 2015 |
| Předmět: |
010504 meteorology & atmospheric sciences
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Geology Ocean Engineering Context (language use) Structural basin 010502 geochemistry & geophysics 01 natural sciences Paleontology Afghan 13. Climate action Facies Petrology 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Geological Society Special Publication Geological Society Special Publication, 2015, In: Brunet, M.-F., McCann, T. & Sobel, E. R. (eds) Geological Evolution of Central Asian Basins and the Western Tien Shan Range, 427, pp.SP427.9. ⟨10.1144/SP427.9⟩ Geological Society Special Publication, 2017, In: Brunet, M.-F., McCann, T. & Sobel, E. R. (eds) Geological Evolution of Central Asian Basins and the Western Tien Shan Range, 427, pp.SP427.9. ⟨10.1144/SP427.9⟩ |
| ISSN: | 2041-4927 0305-8719 |
| DOI: | 10.1144/sp427.9 |
| Popis: | International audience; Based on 11 sections, the palaeoenvironments and depositional history of the NW Afghan–Tajik Basin in southern Uzbekistan have been reconstructed for the time interval of the Early Jurassic–Early Callovian. The earliest sediments, resting on Palaeozoic basement rocks, date from the Early Jurassic Period. Up to the end of the Early Bajocian time, more than 500 m of non-marine sediments accumulated as a result of extensional tectonics inducing active subsidence. In the Late Bajocian time interval, transgression led to the establishment of siliciclastic ramps that were influenced by storm processes. After a condensed unit in the Middle Bathonian, sedimentation resumed in an outer carbonate ramp–basinal setting as the subsidence rate outpaced the diminished siliciclastic sediment supply. The change from siliciclastic to carbonate sedimentation in the Middle Jurassic Period is thought to be multifactorial, reflecting levelling of relief in the hinterland, the subsidence moving to a thermally more quiet stage and a change from humid to arid climatic conditions. These features are also observed in the area of present-day Iran. Similarly, the timing of the transgression coincides with that in eastern and northern Iran, stressing the regional significance of this event. |
| Databáze: | OpenAIRE |
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