Osl Dates and Heavy Mineral Analysis of Upper Quaternary Sediments from the Valleys of the Ér and Berettyó Rivers

Abstract

Abstract:The study of the evolution of the river network in the Great Hungarian Plain has been based on sedimentological, neotectonical, morphological investigations, heavy mineral analysis and complementary OSL dating. The study area extends from the Körös sub-basin into the Ér and Berettyó river valleys which are situated northeast from the subsiding basin and northwest from the uplifting Apuseni Mountains. The OSL ages provide evidence that a large river run in the Ér-valley at least from 46±4 to 39±4 ka. It deposited garnet and magnetite-ilmenite-rich sediments, similar to the recent Berettyó, Ér and SebesKörös rivers and less intensive the modern Tisza river. These sediments originated from the nearly located metamorphic and Neogene volcanic rocks and contain some reworked older clastic sedimentary rocks from the northern part of the Apuseni Mountains. These OSL ages fit the active tectonic phase of the Érmellék depression. Loess is 49-47, 44, 39 and 25 ka old and aeolian sands 10 to 9 ka were dated. Their heavy mineral composition and that of fluvial sands is similar.

Studying the development of fluvial landforms in the Berettyó-Körös Region using geoinformatic methods

“…1). The wide valley bottom found here was being cut by the Ancient Tisza and Ancient Szamos rivers for thousands of years, however, rivers left this area at around 13-14 thousand years BP due to the tectonic subsidence of the North Great Plain (Gábris -Nádor 2007;Thamó-Bozsó et al 2007). Today only the small channel of the Ér river runs across the area.…”

Multi-Tool (LA-ICPMS, EMPA and XRD) Investigation on Heavy Minerals from Selected Holocene Peat-Bog Deposits from the Upper Vistula River Valley, Poland

“…Analysis of heavy minerals in Quaternary sediments is used to determine local changes in transport direction e.g., [2,3], mode of sediment transport, as well as the depositional processes and the environment of accumulation [4][5][6][7][8]. For accurate interpretation of the heavy minerals present in Quaternary sediments, it is important to determine their resistance to chemical weathering and mechanical abrasion [9,10] due to the variable preservation of mineral grains [11][12][13][14].…”

Késő-pleisztocén és holocén eolikus formakincs és homokmozgások vizsgálata Belső-Somogyban

“…A fokozatosan nedvesebbé váló preboreális fázisban is fennállt még a homokmozgások lehetősége a Kárpát-medencében (Gábris 1995). A Vértes előteréből (Thamó-Bozsó et al 2007), a Gödöllői-dombságból (Ujházy et al 2003) és a Nyírségből több helyről is (Thamó-Bozsó et al 2007, Kiss et al 2008) datáltak ebben az időszakban lerakódott homokrétegeket.…”