When tableland flows: Insights from the east Patagonian landslide inventory

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F25%3AA26039OD" target="_blank" >RIV/61988987:17310/25:A26039OD - isvavai.cz</a>

Výsledek na webu

<a href="https://linkinghub.elsevier.com/retrieve/pii/S0169555X24005191" target="_blank" >https://linkinghub.elsevier.com/retrieve/pii/S0169555X24005191</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.geomorph.2024.109567" target="_blank" >10.1016/j.geomorph.2024.109567</a>

Jazyk výsledku

angličtina

Název v původním jazyce

When tableland flows: Insights from the east Patagonian landslide inventory

Popis výsledku v původním jazyce

Landslides in volcanic and sedimentary tablelands encompass some of the world's largest subaerial landslide areas, yet the controls on their distribution and dominant landslide types remain unclear. Our landslide inventory across 517,000 km2 of volcanic tableland in extra-Andean Patagonia reveals that, alongside common rotational slides and spreads forming nearly continuous fringes around plateaus, flow-type landslides dominated by earthflows are very common. Most of these flows are concentrated in the highest and most humid western part of the tableland, formerly covered by the Pleistocene Patagonian Ice Sheet (PIS), where they constitute three-quarters of the landslide area. Nevertheless, many of the longest flows (>10 km) are located in the steepest parts of the tableland outside the PIS limits, paradoxically often in the driest areas. This suggests that these flows are inherited landforms originating during more humid Quaternary or older periods. Multivariate statistical analysis highlights that the distribution of flow-type landslides is largely influenced by caprock thickness. Decreasing caprock exposes larger areas of weak sub-caprock units such as sedimentary rocks and volcaniclastics on escarpments, thereby increasing the potential for viscoplastic flows. Future studies will require detailed exploration of the geomechanical properties of weak layers within sub-caprock units to achieve a comprehensive understanding of the lithological predisposition of flow-type landslides in the Patagonian tableland.

Název v anglickém jazyce

When tableland flows: Insights from the east Patagonian landslide inventory

Popis výsledku anglicky

Landslides in volcanic and sedimentary tablelands encompass some of the world's largest subaerial landslide areas, yet the controls on their distribution and dominant landslide types remain unclear. Our landslide inventory across 517,000 km2 of volcanic tableland in extra-Andean Patagonia reveals that, alongside common rotational slides and spreads forming nearly continuous fringes around plateaus, flow-type landslides dominated by earthflows are very common. Most of these flows are concentrated in the highest and most humid western part of the tableland, formerly covered by the Pleistocene Patagonian Ice Sheet (PIS), where they constitute three-quarters of the landslide area. Nevertheless, many of the longest flows (>10 km) are located in the steepest parts of the tableland outside the PIS limits, paradoxically often in the driest areas. This suggests that these flows are inherited landforms originating during more humid Quaternary or older periods. Multivariate statistical analysis highlights that the distribution of flow-type landslides is largely influenced by caprock thickness. Decreasing caprock exposes larger areas of weak sub-caprock units such as sedimentary rocks and volcaniclastics on escarpments, thereby increasing the potential for viscoplastic flows. Future studies will require detailed exploration of the geomechanical properties of weak layers within sub-caprock units to achieve a comprehensive understanding of the lithological predisposition of flow-type landslides in the Patagonian tableland.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10508 - Physical geography

Projekt

<a href="/cs/project/GA23-07310S" target="_blank" >GA23-07310S: Největší rozsedání skalního masivu na Zemi: proč v aridní Patagonii?</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

GEOMORPHOLOGY

ISSN

0169-555X

e-ISSN

1872-695X

Svazek periodika

—

Číslo periodika v rámci svazku

15 February 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

—

Kód UT WoS článku

001382898500001

EID výsledku v databázi Scopus

2-s2.0-85211373570