| Titre | The response of the rivers of NW Greece to late Quaternary neotectonics, as interpreted from detrital petrology |
| |
| Auteur | Piper, D J W ;
Pe-Piper, G |
| Source | Geosciences vol. 12, issue 392, 2022 p. 1-23, https://doi.org/10.3390/geosciences12110392  Accès ouvert |
| Image |  |
| Année | 2022 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20210029 |
| Éditeur | MDPI |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.3390/geosciences12110392 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Lat/Long OENS | 20.0000 22.0000 39.5000 38.0000 |
| Sujets | tectonique de plaques; rivières; zone détritique; minéraux détritiques; minéraux lourds; systèmes fluviaux; origine; tectonique; pétrologie ignée et métamorphique; Quaternaire |
| Illustrations | cartes de localisation; coupes transversales; photographies; tableaux; diagrammes de distribution des éléments; graphiques; images |
| Diffusé | 2022 10 25 |
| Résumé | (disponible en anglais seulement)
The modern drainage systems of the fold and thrust belt of the external Hellenide orogen of NW Greece are principally orogen-parallel. Late Quaternary changes
in river courses have resulted from neotectonic deformation associated with the Katouna-Stamna fault and with footwall uplift in developing transverse grabens. This study assesses the impact of neotectonic deformation on river patterns and basin
deposition. River sands show differences in modal abundance and varietal geochemistry of heavy minerals and fine sand lithic clasts, determined by scanning electron microscope, that allow identification of past river supply to raised fluvial terrace
and beach deposits. In the past 200 ka, footwall uplift south of developing grabens at Lake Trichonis and the Amvrakikos Gulf promoted orogen-transverse flow, diverting the Arachthos-Louros rivers to the west, causing reversal of drainage to the
north in the lower reach of the Acheloos River. A raised terrace gravel south of Preveza records the southwestward flow of a large paleo-Arachthos river, confirmed by sand petrology in beaches farther south on the Echinadon Sea coast. The use of
varietal heavy minerals and lithic clasts is a rapid and powerful tool for tracking tectonically-induced changes in river patterns. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Des études sur les minéraux des sables fluviaux sont utilisées pour montrer les changements dans le cours des rivières en réponse à des failles
actives |
| GEOSCAN ID | 328265 |
|
|