Provenance and paleoenvironmental context of the Late Pleistocene thin aeolian silt mantles in southwestern Poland – A widespread parent material for soils

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F21%3A00000089" target="_blank" >RIV/00025798:_____/21:00000089 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0341816221002368" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0341816221002368</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.catena.2021.105377" target="_blank" >10.1016/j.catena.2021.105377</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Provenance and paleoenvironmental context of the Late Pleistocene thin aeolian silt mantles in southwestern Poland – A widespread parent material for soils

Popis výsledku v původním jazyce

Thin loess deposits are widespread soil parent materials and important archives for paleoenvironmentalreconstruction. The origin of loess in SW Poland is attributed to the Great Odra Valley (GOV), following thegeneral concept that large rivers play a major role in regional silt supply. Yet, the precise provenance (glaciersources and/or local rocks) of silts, possibly deflated from dry GOV braided riverbeds, is not clear. Our study ofthin and thick loess mantles in SW Poland for the first time indicates the provenance of thin loess based onmineralogical (MLA-SEM) and isotopic analyses (143Nd/144Nd, 87Sr/86Sr). Luminescence ages of five localitiespoint to thin loess mantle formation during and shortly (23.0 to 17.7 ka yr) after the Last Glacial Maximum(LGM). Our isotopic data indicate that thin loess deposits in SW Poland are the mixtures of two main components– local Sudetic and Scandinavian, the latter delivered by the Fennoscandian ice sheet (FIS). Also, detailed analysesof heavy minerals show that a single mineral (e.g., hornblende) may come from both Sudetic and Scandinaviansources. This research highlights the role of the (Pleistocene) GOV in collecting and homogenizingmaterials, while supplying the region with fine particles to be deflated by paleowinds from open surfaces.Anomalies in mineralogy and isotopic composition are connected with influence of Sudetic mountain rivers andlocally blowing silt material by katabatic winds. Regional grain size differentiation of thin loess mantles explainstransport distance and altitude.

Název v anglickém jazyce

Provenance and paleoenvironmental context of the Late Pleistocene thin aeolian silt mantles in southwestern Poland – A widespread parent material for soils

Popis výsledku anglicky

Thin loess deposits are widespread soil parent materials and important archives for paleoenvironmentalreconstruction. The origin of loess in SW Poland is attributed to the Great Odra Valley (GOV), following thegeneral concept that large rivers play a major role in regional silt supply. Yet, the precise provenance (glaciersources and/or local rocks) of silts, possibly deflated from dry GOV braided riverbeds, is not clear. Our study ofthin and thick loess mantles in SW Poland for the first time indicates the provenance of thin loess based onmineralogical (MLA-SEM) and isotopic analyses (143Nd/144Nd, 87Sr/86Sr). Luminescence ages of five localitiespoint to thin loess mantle formation during and shortly (23.0 to 17.7 ka yr) after the Last Glacial Maximum(LGM). Our isotopic data indicate that thin loess deposits in SW Poland are the mixtures of two main components– local Sudetic and Scandinavian, the latter delivered by the Fennoscandian ice sheet (FIS). Also, detailed analysesof heavy minerals show that a single mineral (e.g., hornblende) may come from both Sudetic and Scandinaviansources. This research highlights the role of the (Pleistocene) GOV in collecting and homogenizingmaterials, while supplying the region with fine particles to be deflated by paleowinds from open surfaces.Anomalies in mineralogy and isotopic composition are connected with influence of Sudetic mountain rivers andlocally blowing silt material by katabatic winds. Regional grain size differentiation of thin loess mantles explainstransport distance and altitude.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Catena

ISSN

0341-8162

e-ISSN

—

Svazek periodika

204

Číslo periodika v rámci svazku

September : 105377

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

13

Strana od-do

nestránkováno

Kód UT WoS článku

000657369600003

EID výsledku v databázi Scopus

2-s2.0-85104823500