Building a Multilake Paleoseismometer for the Xianshuihe Fault (Tibetan Plateau, China)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A90263%2F24%3A00381560" target="_blank" >RIV/68407700:90263/24:00381560 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1029/2024TC008508" target="_blank" >https://doi.org/10.1029/2024TC008508</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2024TC008508" target="_blank" >10.1029/2024TC008508</a>
Alternative languages
Result language
angličtina
Original language name
Building a Multilake Paleoseismometer for the Xianshuihe Fault (Tibetan Plateau, China)
Original language description
The Xianshuihe fault, located in the southeastern Tibetan Plateau, stands as one of the most active faults in China. As assessing earthquake hazard relies on access to long-term paleoseismological archives, this paper seeks to optimize the interpretation of paleoseismological records. We retrieved nine sediment cores from three lakes over a 30 km fault segment. Earthquake-related deposits were identified through grain-size analysis, XRF core scanning, and SEM observations of thin sections. Age models based on short-lived radionuclides correlate these events with historical earthquakes, which are recorded with varying sensitivities to seismic intensity across the three lakes. We developed a code that evaluates the plausibility of rupture scenarios against sedimentary evidence: Each site is used as a binary paleoseismometer, indicating whether or not an earthquake reached a local intensity threshold. The combined evidence from the three sites allows to evaluate rupture scenarios on the Xianshuihe fault, according to rupture length-magnitude scaling laws and intensity prediction equations. The most probable scenarios allow to discriminate the rupture area and magnitude range providing a good agreement with historical reconstructions. Our work demonstrates the potential of combining earthquake records to infer the magnitude and rupture zone of paleo-earthquakes, even with a limited data set. Our approach, applicable across diverse geological settings and timescales, offers enhanced precision in understanding long-term paleoseismology covering multiple earthquake cycles. However, establishing the synchronicity of events in such an active area—where earthquake return times are typically <100 years—demands highly accurate age models, which remains challenging.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10505 - Geology
Result continuities
Project
—
Continuities
—
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Tectonics
ISSN
0278-7407
e-ISSN
1944-9194
Volume of the periodical
43
Issue of the periodical within the volume
12
Country of publishing house
US - UNITED STATES
Number of pages
21
Pages from-to
1-21
UT code for WoS article
001371327200001
EID of the result in the Scopus database
2-s2.0-85211163936