New cosmogenic nuclide burial-dating model indicates onset of major glaciation in the Alps during the Middle Pleistocene Transition

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F20%3A00531374" target="_blank" >RIV/67985530:_____/20:00531374 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S0012821X20304350" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0012821X20304350</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.epsl.2020.116491" target="_blank" >10.1016/j.epsl.2020.116491</a>

Jazyk výsledku

angličtina

Název v původním jazyce

New cosmogenic nuclide burial-dating model indicates onset of major glaciation in the Alps during the Middle Pleistocene Transition

Popis výsledku v původním jazyce

A set of four outwash terraces in the northern Alpine Foreland motivated Penck and Bruckner's classical scheme of four great Alpine ice ages: Giinz, Mindel, Riss, and Wiirm. While it is now established that the Wiirm corresponds to marine isotope stages (MIS) 5d-2 (similar to 117-14 ka) and the Riss type locality to MIS 6 (similar to 191-130 ka), there is no consensus regarding the age of the older glaciations. The two oldest terraces, known as TIOhere Deckenschotter (HDS) and Tiefere Deckenschotter (TDS) in Switzerland and neighbouring Germany, contain interbedded tills that directly indicate the first arrival of glaciers into the northern Alpine Foreland. Here, we set out to constrain the timing of the HDS, which signal the first major glaciations in the Alps. To achieve this goal, we devised a new burial-dating model tailored to glaciogenic sediments: P-PINI (Particle Pathway Inversion of Nuclide Inventories). The method applies a source-to-sink framework to a cosmogenic (BeAl)-Be-10-Al-26 inversion model accounting for variable cosmic-ray exposure and non-steady erosion. Taking published (BeAl)-Be-10-Al-26 data from five HDS sites (Feusi, Tromsberg, Siglistorf, Irchel Steig, and Irchel Hiltz) and one TDS site (Iberig), we obtain age distributions (+/- 1 sigma) that are especially well constrained for Feusi (0.93 +/- 0.13 Ma), Iberig (0.93 +/- 0.17 Ma), and Tromsberg (0.88 +/- 0.14 Ma), less well-constrained for Irchel Steig (0.69 +/- 0.25 Ma) and Siglistorf (0.94 +/- 0.27 Ma), and very poorly constrained for Irchel Hiltz (1.39 +/- 0.56 Ma). Consistent with the morphostratigraphy, which dictates that the TDS postdates the HDS, we implemented a Bayesian modelling framework, yielding an age of 0.69 +/- 0.12 Ma for Iberig (TDS) and a combined age of 0.95 +/- 0.07 Ma for the HDS sites.

Název v anglickém jazyce

New cosmogenic nuclide burial-dating model indicates onset of major glaciation in the Alps during the Middle Pleistocene Transition

Popis výsledku anglicky

A set of four outwash terraces in the northern Alpine Foreland motivated Penck and Bruckner's classical scheme of four great Alpine ice ages: Giinz, Mindel, Riss, and Wiirm. While it is now established that the Wiirm corresponds to marine isotope stages (MIS) 5d-2 (similar to 117-14 ka) and the Riss type locality to MIS 6 (similar to 191-130 ka), there is no consensus regarding the age of the older glaciations. The two oldest terraces, known as TIOhere Deckenschotter (HDS) and Tiefere Deckenschotter (TDS) in Switzerland and neighbouring Germany, contain interbedded tills that directly indicate the first arrival of glaciers into the northern Alpine Foreland. Here, we set out to constrain the timing of the HDS, which signal the first major glaciations in the Alps. To achieve this goal, we devised a new burial-dating model tailored to glaciogenic sediments: P-PINI (Particle Pathway Inversion of Nuclide Inventories). The method applies a source-to-sink framework to a cosmogenic (BeAl)-Be-10-Al-26 inversion model accounting for variable cosmic-ray exposure and non-steady erosion. Taking published (BeAl)-Be-10-Al-26 data from five HDS sites (Feusi, Tromsberg, Siglistorf, Irchel Steig, and Irchel Hiltz) and one TDS site (Iberig), we obtain age distributions (+/- 1 sigma) that are especially well constrained for Feusi (0.93 +/- 0.13 Ma), Iberig (0.93 +/- 0.17 Ma), and Tromsberg (0.88 +/- 0.14 Ma), less well-constrained for Irchel Steig (0.69 +/- 0.25 Ma) and Siglistorf (0.94 +/- 0.27 Ma), and very poorly constrained for Irchel Hiltz (1.39 +/- 0.56 Ma). Consistent with the morphostratigraphy, which dictates that the TDS postdates the HDS, we implemented a Bayesian modelling framework, yielding an age of 0.69 +/- 0.12 Ma for Iberig (TDS) and a combined age of 0.95 +/- 0.07 Ma for the HDS sites.

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

2020

Kód důvěrnosti údajů

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

Název periodika

Earth and Planetary Science Letters

ISSN

0012-821X

e-ISSN

—

Svazek periodika

549

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

116491

Kód UT WoS článku

000566576500004

EID výsledku v databázi Scopus

2-s2.0-85089153424