| Title |
Geochemical peculiarities of sandy sediments from the late pleistocene and holocene of lithuania / |
| Translation of Title |
Lietuvos vėlyvojo pleistoceno ir holoceno smėlingų nuosėdų geocheminiai ypatumai. |
| Authors |
Same Fakam, Jessica Cindy |
| Full Text |
|
| Pages |
47 |
| Keywords [eng] |
Geochemistry, Late Pleistocene, Holocene, European Shale (EUS) normalization, Europium anomaly, ratio proxy, Chemical Index of Alteration(CIA), sediment provenance, paleoenvironment, Lithuania. |
| Abstract [eng] |
This master's thesis explored the geochemical composition of Late Pleistocene to Holocene sediments from two outcrops (Krokšlys and Dengtiltis) and one borehole (Šventoji-46766) in Lithuania. The analysis revealed a consistent light rare earth element (LREE) composition, with variable Europium (Eu) anomalies ranging from moderately negative (0.5) to strongly positive (1.60) signifying differences in source material and feldspar weathering. Geochemical indices such as Si/Al, Zr/Rb, Ti/Al and Chemical Index of Alteration (CIA) highlighted shifts in grain size and weathering intensity across stratigraphic layers. The results suggest that the sediments were primarily derived from felsic continental crust that has been altered by glacial processes and changing environmental conditions. The presence of Eu anomalies is indicative of mineral input or localized sedimentary events, which in turn demonstrate paleoclimatic dynamics. This study demonstrates the value of combining elemental ratio proxies with REE patterns in reconstructing sediment provenance and paleoenvironmental conditions. Furthermore, it provides a fundamental geochemical framework for future paleoenvironmental research in glaciated regions of the Baltic. |
| Dissertation Institution |
Vilniaus universitetas. |
| Type |
Master thesis |
| Language |
English |
| Publication date |
2025 |
