High Resolution Mineralogical Characterization of Sediments - Lake Bolătău-Feredeu (Romania)

Abstract

The catchment (bedrock and soil) and sediments of lake Bolătău, Romania were studied by high resolution multi-methodological investigations to characterize paleoenvironmental and formation conditions. Particle size analyses, optical and cathodoluminescence microscopy, FTIR-ATR and Raman spectroscopy, X-ray powder diffraction, and XRF were applied for microtextural, chemical, micro-mineralogical and embedded organic material characterization and distribution of the sediments, especially concerning geochemical conditions, like pH and redox potential change. Our results support physical and chemical weathering in the process of soil formation with appearance of the new minerals appear (10Å sized phyllosilicates and clay minerals). Comparison of these studies offer possible differentiation of syn- and diagenetic mineralization, the clarification of debris contribution, microbial mediation and complex mineralization via decomposition of cell and extracellular polymeric substance. Based on the analyses on the abrasives, a suboxic environment prevailed in the depositional area and considerable microbial contribution is proposed via accumulation of lake sediments.

Provenance of sediments from Barra del Tordo and Tesoro beaches, Tamaulipas State, northwestern Gulf of Mexico

“…The mineralogical and geochemical compositions of detrital sediments are commonly used to investigate the provenance, weathering, and tectonic setting of source area (e.g. Cullers et al 1988;Chaudhuri et al 2018Chaudhuri et al , 2020Critelli 2018;Al-Kaaby and Albadran 2020;Banerjee et al 2020;Rivera-Gómez et al 2020;Critelli et al 2021;Karlik et al 2021). Although detrital sediments are influenced by diagenesis and recycling, their mineral and geochemistry composition is primarily depended on source rocks.…”

Natural and anthropogenic impacts reflected by paleoclimate proxy parameters in a lake-forest system in Bukovina, Romania

“…The study site selected for this analysis is located in Bukovina region, Romania, where historical records documented substantial landscape changes throughout the past centuries, including mainly deforestation and subsequent land cover / land use shifts (Barbu, I. et al 2016). Lake Bolătău-Feredeu is regarded as one of the Bukovinian Millenial lakes and is suitable for high-resolution analysis, based on the findings of previous studies at this site and in the neighbouring area (Mîndrescu, M. et al 2013(Mîndrescu, M. et al , 2016Florescu, G. et al 2017;Karlik, M. et al 2018Karlik, M. et al , 2021.…”

The environmental change in the Lake Bolătău

“…The study site selected for this analysis is located in Bukovina region, Romania, where historical records documented substantial landscape changes throughout the past centuries, including mainly deforestation and subsequent land cover / land use shifts (Barbu et al 2016). Lake Bolătău-Feredeu is regarded as one of the Bukovinian Millenial lakes and is suitable for high-resolution analysis, based on the findings of previous studies at this site and in the neighbouring area (Mîndrescu et al 2013& 2016Karlik et al 2018Karlik et al & 2021.…”