Locking depth, slip rate, and seismicity distribution along the Daofu–Kangding segment of the Xianshuihe fault system, eastern Tibetan Plateau

Spatial Slip Rate Distribution Along the SE Xianshuihe Fault, Eastern Tibet, and Earthquake Hazard Assessment

“…The XSH fault system consists of four main left‐lateral strike‐slip fault segments which separate the Bayan Har and Qiangtang/Chuandian blocks to the NE and SW, respectively: the Yushu/Batang faults at the NW end (where the 2010 M w 6.9 Yushu earthquake occurred), the Ganzi fault in the NW, the XSH and MX faults in the center, and the Anninghe‐Zemuhe‐Xiaojiang faults in the SE (Figure 1). In the Kangding region, the surface traces of the Yalahe, Selaha and ZDT faults appear to coincide with left‐lateral offsets of the Gongga‐Zheduoshan granite batholith (Chen et al., 1985) (Figure 2c) and may be connected at depth (e.g., Allen et al., 1991; Jiang, Wen, et al., 2015; Li et al., 2020). While the Selaha and ZDT faults show evidence of recent activity along most of their traces, with numerous scarps, sag ponds, and left‐lateral (with minor vertical) offsets of mostly moraines and gullies, such clear evidence seemed to be lacking along the Yalahe fault where it is parallel to the Selaha fault (Allen et al., 1991; Bai et al., 2018).…”

“…The XSH fault slip rate based on the longest GPS record is slightly lower at ∼8–10.2 mm/yr (Zheng et al., 2017). At a more detailed level, GPS‐derived rates vary between 0.8 and 3.8 mm/yr along the Yalahe fault (Li et al., 2020), 5.9–9.1 mm/yr along the Selaha fault (Li et al., 2019, 2020), 0.4–3.4 mm/yr along the ZDT fault (Li et al., 2020) and 4.41–19.3 mm/yr along the MX fault (Jiang, Xu, et al., 2015; Li et al., 2019; Qiao & Zhou, 2021; Wang & Shen, 2020). Two recent studies have suggested rates of ∼11 mm/yr (Wang & Shen, 2020) and 8.8–16 mm/yr (Qiao & Zhou, 2021) across the three branches (Yalahe/Selaha/ZDT) of the SE XSH fault (Figure 3 and Table 1).…”

Formation and evolution of Xianshuihe Fault Belt in the eastern margin of the Tibetan Plateau: Constraints from structural deformation and geochronology

“…The second period is mainly brittle-ductile deformation that cutting the early ductile deformation, which is manifested by the rock that was crumpled and intensively cleaved along the main fault in the north and the thrust nappe structure in the south. The late period is a brittle broken stage, resulting in the fracture zone of the north section show that the XSF is still in activity (Li, Zhou, Li, Yang, & Li, 2020). The experimental data were calculated using the GLITTER (vet 4.0, Macquaie University) program and the isotope ratios, ages, and error were obtained.…”

“…The late period is a brittle broken stage, resulting in the fracture zone of the north section and the fault gouge of the Kangding profile. Furthermore, GPS data show that the XSF is still in activity (Li, Zhou, Li, Yang, & Li, 2020).…”

Insights into the tectonics in Myanmar from new high-resolution and integrated focal mechanism catalogs

“…We will discuss the seismogenic depth along each segment of the fault as previously defined by Wang et al (2014). Note that we consider the depth of the deepest earthquake in each segment as the upper bound of the locking depth, as we realize that on other faults, the locking depth defined by seismicity could be deeper than the locking depth defined by geodetic data (Li et al, 2020).…”