Conference
Far-field interplay between the intra-Ordovician compressional tectonics along the northeastern Gondwana active margin and Gondwana interior: insights from the central Lybia Ordovician succession
| العنوان: | Far-field interplay between the intra-Ordovician compressional tectonics along the northeastern Gondwana active margin and Gondwana interior: insights from the central Lybia Ordovician succession |
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| المؤلفون: | Spahić, Darko, Cocco, Fabrizio, Tančić, Pavle |
| المصدر: | Congresso congiunto SGI-SIMP - Geology for a sustainable management of our Planet; September 2-5, 2024; Bari, Italia |
| بيانات النشر: | Società Geologica Italiana |
| سنة النشر: | 2024 |
| المجموعة: | CeR - Central Repository ICTM (Institute of Chemistry, Technology and Metallurgy, University of Belgrade) / CER - Centralni Repozitorijum IHTM-a (Institut za hemiju, tehnologiju i metalurgiju, Univerzitet u Beogradu) |
| مصطلحات موضوعية: | Intra-Arenigian unconformity, Sardic phase, Sarrabese pahse, Cenerian Orogeny |
| الوصف: | The Variscan basement of southern Europe, the Alps, and the Carpathian-Balkans belt hold clues about the pre-Upper Ordovician tectonics along the northeastern Gondwana margin. The folds mapped at the peripheral south European terrane are vital indicators of the compressional northeastern Gondwana event. In addition, intra-Ordovician events likely affected the remote parts of widespread Cambrian-Lower Ordovician shalfal siliciclastic succession (Sardic and Sarrabese unconformities). In turn to southern Europe, just a few reports explain the pre-Hirnantian mid-Ordovician compressional-type tectonics that affected Saharan's north Gondwanan interior basins. Several hundred-meter-thick conglomerates, often followed by widespread North African ironstone sequences, rest on the angular unconformity, providing evidence of a critical intra-Ordovician erosional event. The constraints on tectonomagmatic imprints show signals of peripheral magmatic activity, characterized by calk-alkaline mafic intrusive and volcanic rocks Middle-Upper Ordovician in age. These south European inclusive Cambrian-Ordovican truncations of interior basins are interpreted as a convergent margin leading to a late Lower Ordovician folding event (Sardic and Sarrabese phases), mid-Ordovician uplift and erosion, and the development of a volcanic arc in a peripheral northeastern Gondwana subduction zone. The Lower to mid-Ordovician compressional-type tectonics with no crustal thickening having a relatively mild effect on the northeast cratonic margin is called the Cenerian(Sardic) Orogeny. In this abstract we present data supporting the idea that the Ordovician geodynamics along the northeastern Gondwana margin had a far-field tectonic effect on the Gondwana interior, now detectable in North Africa. A combination of literature review and field mapping provides first-order constraints between the Cambro-Ordovician features of central Libya and peri-Gondwanan Ordovician geodynamics recorded in south-European and Alpine-Carpathian-Balkan basements. In ... |
| نوع الوثيقة: | conference object |
| اللغة: | English |
| Relation: | info:eu-repo/grantAgreement/MESTD/inst-2020/200026/RS//; https://cer.ihtm.bg.ac.rs/handle/123456789/7898; http://cer.ihtm.bg.ac.rs/bitstream/id/31175/bitstream_31175.pdf |
| DOI: | 10.3301/ABSGI.2024.02 |
| الاتاحة: | https://cer.ihtm.bg.ac.rs/handle/123456789/7898 https://doi.org/10.3301/ABSGI.2024.02 http://cer.ihtm.bg.ac.rs/bitstream/id/31175/bitstream_31175.pdf |
| Rights: | openAccess ; https://creativecommons.org/licenses/by/4.0/ ; BY ; Società Geologica Italiana |
| رقم الانضمام: | edsbas.C3D00A6C |
| قاعدة البيانات: | BASE |
| DOI: | 10.3301/ABSGI.2024.02 |
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