 |
| Titel |
On possible sources of loess deposits in the Carpathian Basin: an isotopic approach |
| VerfasserIn |
Gábor Újvári, Frank C. Ramos, Corey Dimond, János Kovács, György Varga, Andrea Varga |
| Konferenz |
EGU General Assembly 2010
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250034882
|
|
|
|
|
|
| Zusammenfassung |
| Origin and formation characteristics of loess deposits in the Carpathian Basin have long been
debated and remain unresolved. Previous work [1, 2] identified 3 main sources of loess
deposits in this region: (I) glacial materials carried through the Moravian Depression by
glacial floodwaters, (II) weathering products of the Carpathian Flysch deposits,
and (III) glacial materials from the Alpine region. In addition, Pannonian deposits
(ca. 1.8 to 12 Ma age) could theoretically contribute materials to loess deposits in
Hungary [3]. Most recently, some [4] have emphasized the significance of fluvial
action in loess formation, although aeolian entrainment played an essential role
as well and provides material (large dust, coarse and very coarse silt: 16-62 μm)
from the Alps and Carpathians to loess deposits in the basin. Others [5] have gone
further and suggest that small dust (fine and very fine silt: 2-8 μm), originating
from North Africa, could provide a silty admixture to the soil/loess system in this
region.
We measured Sr isotopes on several loess samples (bulk loess and grain size fractions:
63-31 μm, |
|
|
|
|
|
|