Palaeoseismicity recorded in soft-sediment deformation structures within a 166-m-long drill core from Diexi Palaeolake, eastern Tibetan Plateau

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F25%3A00642827" target="_blank" >RIV/67985530:_____/25:00642827 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s11629-025-9874-y" target="_blank" >https://link.springer.com/article/10.1007/s11629-025-9874-y</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11629-025-9874-y" target="_blank" >10.1007/s11629-025-9874-y</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Palaeoseismicity recorded in soft-sediment deformation structures within a 166-m-long drill core from Diexi Palaeolake, eastern Tibetan Plateau

Popis výsledku v původním jazyce

Soft-sediment deformation structures (SSDS) in water-saturated, unconsolidated sediments are the product of various causes and provide a valuable record of environmental and geological perturbations. We report a record of SSDS preserved in a ~166 m-long drill core (DX-2) extracted from the Late Pleistocene Diexi Palaeolake, eastern Tibetan Plateau. Two factors make this an outstanding site for studying SSDS: (1) it is among the most seismically active regions on Earth, and (2) it has experienced extremely fast sedimentation rates (~15 mm/yr) thanks to the prodigious sediment supply from seismically perturbed hillslopes and rivers upstream. We describe and interpret 13 SSDS types within the DX-2 based on detailed sedimentological, morphological, and lithological analysis. We consider the genesis of the abundant SSDS observed in the DX- 2 core with several possibilities: mass movement, rock avalanche-driven tsunamis, rapid sedimentation, and seismic shaking as the most probable triggering mechanisms. We suggest high intensity earthquakes of VI (Modified Mercalli Intensity) or greater as drivers of SSDS in the DX-2. Based on our observations, we propose a conceptual model that attempts to explain the transition from ductile to brittle SSDS behaviour with progressive accumulation and consolidation of the sediment pile. This paper highlights the value of SSDS analysis in palaeo-earthquake identification, aiming to improve the applicability of SSDS as a palaeo-earthquake marker in alpine and canyon areas

Název v anglickém jazyce

Palaeoseismicity recorded in soft-sediment deformation structures within a 166-m-long drill core from Diexi Palaeolake, eastern Tibetan Plateau

Popis výsledku anglicky

Soft-sediment deformation structures (SSDS) in water-saturated, unconsolidated sediments are the product of various causes and provide a valuable record of environmental and geological perturbations. We report a record of SSDS preserved in a ~166 m-long drill core (DX-2) extracted from the Late Pleistocene Diexi Palaeolake, eastern Tibetan Plateau. Two factors make this an outstanding site for studying SSDS: (1) it is among the most seismically active regions on Earth, and (2) it has experienced extremely fast sedimentation rates (~15 mm/yr) thanks to the prodigious sediment supply from seismically perturbed hillslopes and rivers upstream. We describe and interpret 13 SSDS types within the DX-2 based on detailed sedimentological, morphological, and lithological analysis. We consider the genesis of the abundant SSDS observed in the DX- 2 core with several possibilities: mass movement, rock avalanche-driven tsunamis, rapid sedimentation, and seismic shaking as the most probable triggering mechanisms. We suggest high intensity earthquakes of VI (Modified Mercalli Intensity) or greater as drivers of SSDS in the DX-2. Based on our observations, we propose a conceptual model that attempts to explain the transition from ductile to brittle SSDS behaviour with progressive accumulation and consolidation of the sediment pile. This paper highlights the value of SSDS analysis in palaeo-earthquake identification, aiming to improve the applicability of SSDS as a palaeo-earthquake marker in alpine and canyon areas

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA22-13190S" target="_blank" >GA22-13190S: Stanovení chronologie prvních rozsáhlých Eurasijských ledovcových štítů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Mountain Science

ISSN

1672-6316

e-ISSN

1993-0321

Svazek periodika

22

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

CN - Čínská lidová republika

Počet stran výsledku

26

Strana od-do

4464-4489

Kód UT WoS článku

001645391200017

EID výsledku v databázi Scopus

2-s2.0-105025469263