Details
| Original language | English |
|---|---|
| Article number | 106255 |
| Number of pages | 11 |
| Journal | Journal of Asian earth sciences |
| Volume | 273 |
| Early online date | 18 Jul 2024 |
| Publication status | Published - Sept 2024 |
Abstract
The restraining and releasing bend region, encompassing the South Qianning, Kangding, and North Moxi segments, occupies a distinctive position within the Xianshuihe fault zone and plays a pivotal role in the analysis of seismic hazards. Our study focused on paleoearthquake research on the Qianning segment of the Xianshuihe fault zone through the integration of tectonic geomorphology, trench excavations, and radiocarbon dating methodologies. Three events, designated as ET1-ET3, have been found, occurring at 635–519, 823–672, and 3515–1482 yr B.P., respectively. A chronological framework for earthquake events has been established since the Holocene. The coefficient of variation (CoV) (0.75 reveals a weakly periodic recurrence model governing the activity of the Qianning segment. Moreover, both the Qianning and Kangding segments exhibit heightened susceptibility to cascading ruptures within the context of a single earthquake. The integration of shallow and deep data reveals a noteworthy transformation in the fault structure, transitioning from a solitary deep structure within the Qianning segment to a flower structure in the Kangding segment. This structural evolution is attributed to the migration of activity from the Yalahe Fault to the Selaha Fault and Zheduotang Fault, resulting in the short-cutting process within the Xianshuihe Fault Zone.
Keywords
- Deep structure, Fault activity, Paleoearthquake, Restraining bend, Short-cutting, Xianshuihe fault zone
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geology
- Earth and Planetary Sciences(all)
- Earth-Surface Processes
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In: Journal of Asian earth sciences, Vol. 273, 106255, 09.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Cascading rupture of large strike-slip fault bends
T2 - Evidence from paleoearthquakes in the Xianshuihe fault zone, Eastern Tibetan Plateau
AU - Ma, Jun
AU - Li, Zhengfang
AU - Wang, Mingming
AU - Zhou, Bengang
AU - Ha, Guanghao
AU - Motagh, Mahdi
N1 - Publisher Copyright: © 2024 Elsevier Ltd
PY - 2024/9
Y1 - 2024/9
N2 - The restraining and releasing bend region, encompassing the South Qianning, Kangding, and North Moxi segments, occupies a distinctive position within the Xianshuihe fault zone and plays a pivotal role in the analysis of seismic hazards. Our study focused on paleoearthquake research on the Qianning segment of the Xianshuihe fault zone through the integration of tectonic geomorphology, trench excavations, and radiocarbon dating methodologies. Three events, designated as ET1-ET3, have been found, occurring at 635–519, 823–672, and 3515–1482 yr B.P., respectively. A chronological framework for earthquake events has been established since the Holocene. The coefficient of variation (CoV) (0.75 reveals a weakly periodic recurrence model governing the activity of the Qianning segment. Moreover, both the Qianning and Kangding segments exhibit heightened susceptibility to cascading ruptures within the context of a single earthquake. The integration of shallow and deep data reveals a noteworthy transformation in the fault structure, transitioning from a solitary deep structure within the Qianning segment to a flower structure in the Kangding segment. This structural evolution is attributed to the migration of activity from the Yalahe Fault to the Selaha Fault and Zheduotang Fault, resulting in the short-cutting process within the Xianshuihe Fault Zone.
AB - The restraining and releasing bend region, encompassing the South Qianning, Kangding, and North Moxi segments, occupies a distinctive position within the Xianshuihe fault zone and plays a pivotal role in the analysis of seismic hazards. Our study focused on paleoearthquake research on the Qianning segment of the Xianshuihe fault zone through the integration of tectonic geomorphology, trench excavations, and radiocarbon dating methodologies. Three events, designated as ET1-ET3, have been found, occurring at 635–519, 823–672, and 3515–1482 yr B.P., respectively. A chronological framework for earthquake events has been established since the Holocene. The coefficient of variation (CoV) (0.75 reveals a weakly periodic recurrence model governing the activity of the Qianning segment. Moreover, both the Qianning and Kangding segments exhibit heightened susceptibility to cascading ruptures within the context of a single earthquake. The integration of shallow and deep data reveals a noteworthy transformation in the fault structure, transitioning from a solitary deep structure within the Qianning segment to a flower structure in the Kangding segment. This structural evolution is attributed to the migration of activity from the Yalahe Fault to the Selaha Fault and Zheduotang Fault, resulting in the short-cutting process within the Xianshuihe Fault Zone.
KW - Deep structure
KW - Fault activity
KW - Paleoearthquake
KW - Restraining bend
KW - Short-cutting
KW - Xianshuihe fault zone
UR - http://www.scopus.com/inward/record.url?scp=85199101085&partnerID=8YFLogxK
U2 - 10.1016/j.jseaes.2024.106255
DO - 10.1016/j.jseaes.2024.106255
M3 - Article
AN - SCOPUS:85199101085
VL - 273
JO - Journal of Asian earth sciences
JF - Journal of Asian earth sciences
SN - 1367-9120
M1 - 106255
ER -