Luminescence age constraints on palaeo-earthquake events along the lingwu fault in the Yinchuan Basin, China

Wang, Xulong; Chai, Zhifang; Du, Pengfei; Lei, Qiyun; Yin, Geng; Lu, Yongcheng

doi:10.2478/s13386-011-0051-4

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…The Yellow River, which flows to the north, is marked in dark blue. Yellow circles mark sites where observations have been made about the recent activity of the four principal faults in the graben [ Deng and Liao , ; Wang et al , , ; Lei et al , , ; Lin et al , ]. With the exception of one observation (in red) by Lin et al [], all of the data are consistent with the East Helanshan Fault being the causative fault for the 1739 event.…”

Section: Discussionmentioning

confidence: 91%

“…Furthermore, Lei et al [] found from a composite drilling profile on the northern section of the Yellow River Fault, approximately 25 km southeast of Pingluo, that no earthquakes have occurred here for at least 3625 ± 35 years ( 14 C date). Wang et al [] excavated a trench on the Lingwu Fault, the southern extension of the Yellow River Fault, at a location 30 km south‐southeast of Yinchuan and found that no earthquakes have occurred on this segment for at least 17.8 ± 0.8 ka (optically stimulated luminescence date).…”

Section: Discussionmentioning

confidence: 99%

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A major, intraplate, normal‐faulting earthquake: The 1739 Yinchuan event in northern China

et al. 2016

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A large continental normal‐faulting earthquake occurred in the Yinchuan Graben in northern China on 3 January 1739. This event is of significant interest for two reasons. First, it has been suggested on the basis of historical records of shaking that this was a magnitude 8.0 event. If this is true, the 1739 earthquake would be one of the largest continental normal‐faulting earthquakes ever recorded, and this should prompt us to consider the factors contributing to its unusual size. Second, there has been some debate in the literature about the causative structure, with at least three different faults posited as the seismogenic source. We use five 14C ages to date a series of scarps on the East Helanshan Fault, which lies to the west of the graben, and bracket the scarp formation to the last 350 years. We use high‐resolution, stereo imagery from the Pleiades satellites to build a 1 to 2 m resolution DEM of the fault and combine this with field observations to map the East Helanshan rupture in detail. We then construct a throw distribution, determine the slip vector azimuth, and reassess the earthquake magnitude using simple scaling relationships. We conclude that the 1739 earthquake occurred on the East Helanshan Fault, had a rupture length of approximately 87 km, a maximum throw of 5.1 m, and an average throw of 3.0 m, yielding a best estimate magnitude in the range Mw 7.1 to Mw 7.6. We suggest that the previous magnitude estimates are biased by enhanced shaking of the sediments within the Yinchuan Graben.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

A major, intraplate, normal‐faulting earthquake: The 1739 Yinchuan event in northern China

et al. 2016

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“…High-resolution and highprecision dating of seismic events that help to calculations of recurrence intervals on timescales of decades to several thousand years is challenging, particularly in semi-arid to arid settings, where organic debris for 14 C dating is uncommon. Recent studies (e.g., Banerjee et al, 2001;Lu et al, 2007;Porat et al, 2009;Fattahi et al, 2010;Liu et al, 2010;Wang et al, 2012) have shown that optical dating of earthquake-related deposits is capable of producing robust chronologies of paleo-earthquake events. However, a potential problem in such settings is that light exposure of earthquake-related sediments may have been insufficient to fully reset (bleach) the OSL signal prior to deposition (Cunha et al, 2009;Yang et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Coarse versus fine-grain quartz optical dating of the sediments related to the 1985 Ms7.1 Wuqia earthquake, northeastern margin of the Pamir salient, China

et al. 2017

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Optical dating of earthquake related sediments were investigated including one modern sample and three samples from a trench excavated across the 1985 Ms7.4 Wuqia Earthquake surface rupture. The results indicated that equivalent dose (D e ) values vary with grain size and the method used for D e determination. The residual dose of the modern sample is 0.1 ka (0.2 +0.2 -0.1 Gy) for the quartz single grain measurements. Only 1.5-3.6% of the grains have a detectable OSL signal. Single grain quartz ages are similar to the expected ages. Fine grain quartz results overestimate the D e values and are much older than single grain quartz and coarse grain quartz small aliquot standardized growth curve (SA-SGC) ages. Single grain quartz OSL dating may be optimal for dating earthquake related deposits, but SA-SGC can save measurement time and has potential for dating some poorly bleaching samples.

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Optically stimulated luminescence (OSL) dating of quartz grains within the sand dykes cutting the lacustrine deposits in the Burdur area (SW Turkey) and its tectonic interpretation

Özçelik

2015

Arab J Geosci

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Luminescence age constraints on palaeo-earthquake events along the lingwu fault in the Yinchuan Basin, China

Cited by 5 publications

References 4 publications

A major, intraplate, normal‐faulting earthquake: The 1739 Yinchuan event in northern China

A major, intraplate, normal‐faulting earthquake: The 1739 Yinchuan event in northern China

Coarse versus fine-grain quartz optical dating of the sediments related to the 1985 Ms7.1 Wuqia earthquake, northeastern margin of the Pamir salient, China

Optically stimulated luminescence (OSL) dating of quartz grains within the sand dykes cutting the lacustrine deposits in the Burdur area (SW Turkey) and its tectonic interpretation

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