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- Title
UNCOVERING THE PRE-MIOCENE "HERITAGE" THE CARPATHIANS OBLITERATED IN THEIR RISE.
- Authors
TUDOR, EUGEN; MUNTEANU, IOAN; AVRAM, VICTOR
- Abstract
Foreland basins are dependent on two key parts, a „moving part" (the fold and thrust belt) and a relatively „stationary part" (the pre-existing basins). Throughout the study area multiple wells drilled the pre-Miocene stratigraphy from multiple basins (East European Platform, Bârlad Depression, North Dobrogea Promontory, East Moesian Platform) and each basin had a different response for the E-ward advancing Carpathians. The older and colder the plates, the more rigidly they responded to the advancement of the nappes and a new pre-foreland setup was established through creation of multiple depocenters across the basin. The pre-existing topography played an important role for foreland geometry and fill. Main findings show that the Northern foreland didn't advance too far away as the East European Platform broke apart on long N-S fault zones rather than flexing and creating too much accommodation space for the Miocene fill. Further to the South we observe that the nappes had more space to advance, and this seems to be related to the response of the Bârlad Depression, as weaker plate flexing easily under the load and generating a rapid subsiding foreland basin. This area shows the highest subsidence rate for the Sarmatian section (Bacau area). Further to the South as the Carpathians hit the toughest block, the Nord Dobrogea Promontory (made up of Palaeozoic sediments and metamorphic basement rocks), the advancement of the thrust belt found advancing to the East as difficult as it can possibly be, thus the weakest link in the area (East Moesia), started flexing and creating large accommodation space starting with Sarmatian and through time until Romanian-Quaternary times.
- Subjects
THRUST belts (Geology); FAULT zones; OROGENIC belts; METAMORPHIC rocks; TOPOGRAPHY; LAND subsidence
- Publication
GeoEcoMarina, 2021, Vol 27, p105
- ISSN
1224-6808
- Publication type
Article
- DOI
10.5281/zenodo.5795054