Z.-J. Han's research while affiliated with Institute of Geology, China Earthquake Administration and other places
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Publications (15)
The kinematic property of the Wenchan earthquake's surface rupture changes from strike-slip with slightly smaller dip-slip component to the dominant dextral strike-slip at the northeasternmost region between Shikan in Pingwu county and Woqian in Qingchuan county, where, the dip-slip component is reverse between Shikan and Pingxi, normal at Kuangpin...
Primary evidence of the latest tectonic deformation style and the activity age of the Dayi Fault in the Sichuan Basin are obtained by field geological mapping, and surveying with the help of 3 D scanner and total station. In the region of Wenshangou-Longfengchang northeast of Dayi county on the northwestern wall of the fault, the time of Cretaceous...
Taking five major, M≥7 earthquakes occurred in the northern section of South-north seismic zone, an inter-region between northeast Tibetan Plateau and North China block, during 360a from 1561 to 1920 as examples, the Coulomb failure stress changes (ΔCFS's) caused by the previous earthquakes are calculated on the rakes of fault surfaces of the later...
Few large earthquakes (Ms ≥ 7) have ever occurred in the historical records in eastern China, especially in southeast continental region of 105° - 120°E, 20° - 35°N. However, many moderate-strong earthquakes with magnitude between 5 and 6 occurred there, such as the 1962 Heyuan Ms 6.4 earthquake and 1969 Yangjiang Ms 6.7 earthquake in Guangdong pro...
Combined with the consideration of relative codes, this paper mainly presents a preliminary analysis on the engineering application of Yuwangshan Fault zone based on the results achieved in the project of active fault exploration and seismic hazard assessment in the city of Ningbo. The conclusions we get from it are as follows. We don't have to tak...
The Kalpintag nappe is located at the southwestern foot of the Tianshan Mountains, consisting of several rows of NE- to EW-trending fold-reverse fault zones. This paper demonstrates the activities and slip rate of the frontal faults of the first to third row fold-reverse fault zones located to the west of the Piqiang-Bachu phosphorite mine. The new...
The Zhonggu Fault, located in the Yuanjiang-Yuanyang basin and active strike-slip fault since Neogene, is part of the southern segment of the Red River Fault. Its neotectonic movement resulted in the separation of the Red River basin (a Miocene basin) into two sub-basins and a dextral slip extending to the Guotoushan-Damanmi region. The concomitant...
The Kalpintag fold nappe is located at the northwestern foot of the Tianshan Mountains. Since Cenozoic, owing to the Indian-Eurasian collision, the Mesozoic fold structures of Tianshan have been rejuvenated, uplifted and pushed northward and westward. As a result, several rows of fold-reverse fault zones have been progressively formed within the fo...
Kalpin thrust tectonic is an active reverse fault fold zone at the southwestern Tianshan front piedmont, it consists of five to six rows of arc fold zones which are formed by Cambrian-Quaternary sedimentary rocks. The major morphology of the anticline is multiple box-shaped or asymmetry inclined, mostly, and it is similar to that of fault-bend fold...
The Kalpintag Fault locates at the most forefront of Kalpintag nappe tectonics, and can be separated into eastern and western segments by Piqiang Fault. Six large trenches are excavated along the western segment and four paleoearthquakes can be distinguished in the three trenches of them. The first paleoevent occurred about 12ka BP, the second even...
Geological, geomorphic and geophysical methods, including drilling and chronological dating, are applied to determine whether the suggestively buried Taoyuan fault exists. Stratum units at two sides of the fault are continuous. The "normal fault", found at east side of Yuanjiang River, Yaohe town, is actually a fissure caused by un-loading. Weak ce...
The first stage project of the west route of South-to-North Water Transfer Project is located in Bayankela block interior of the eastern Qinghai-Tibet Plateau. The boundary of Bayankela block is all the giant strike-slip or thrust fault systems, which have intense activity; and the boundary belts are the primary sites of the accumulation and releas...
Field investigation has revealed that the large-scale dextral strike-slip movement and the associated tectonic deformation along the Honghe (Red River) Fault zone have the following features. Geometrically, the whole Red River fault system can be divided into three deformation regions: the north, central and south deformation regions. On the easter...
A large number of observed data about the widths of earthquake surface ruptures produced on diverse types of active faults, as well as the widths of intense deformation zones in trench logs across active faults are presented in this paper. Combining these data with the close relation between the damage zone of surface construction and the spatial p...
Okada's (1992) elastic half-space theory is applied to calculate the surface displacement and the amount of differential displacement produced by buried active faults. The theory has been verified to some extent by the 1992 Landers earthquake, United States, the 1994 Northridge earthquake, United States, the 1995 Kobe earthquake, Japan and the 1999...
Citations
... The Yingxiu-Beichuan (Y-B) fault is the longest and shows an oblique reverse/right-lateral motion. Focal mechanisms (Huang et al., 2008;Wang et al., 2009), seismic source inversion Nakamura et al., 2010), surface offsets (e.g., An et al., 2010;Fu et al., 2008Fu et al., , 2011H.B. Li et al., 2008aH.B. ...
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... The sinistral offset might have been as long as 700 km (Harrison et al., 1992;Leloup et al., 1995;Chen et al., 1996;Harrison et al., 1996;Wan et al., 1997;Searle et al., 2010). Since the Pliocene, normal and dextral strike-slip movements have been the predominant forms of motion of the RRF (Ran et al., 1988;Guo et al., 1996;Trieu, 2003;Xiang et al., 2004;Xiang et al., 2007;Wang et al., 2011). ...
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... (2) Late Quaternary activity is emphasized. Under this proposition, a fault is considered active if it "has moved since the late Quaternary (primarily in the time span of 100-120 ka B.P.), is still moving at present, and is likely to move in the future" [11,12,118,134,135], or if there is "evidence of displacement in the late Pleistocene, especially since the Holocene" [136]. (3) The initiation time of active faults may differ among different regions, and faults are active as long as they are still moving now. ...
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... Nevertheless, it remains challenging to evaluate the extent of the influence of the surface rupture zone resulting from movement along a concealed fault and to understand the geometric and kinematic characteristics of surface rupture zones caused by concealed faults in future earthquake events. Therefore, this issue, which requires further exploration, continues to constitute a major focus of active fault evaluations [7]. In particular, with the development of active fault detection systems in cities, it is urgently necessary to provide both a basis for evaluating the surface ruptures of strong earthquakes and a method to evaluate the geometric and kinematic characteristics of surface rupture zones for engineering construction projects. ...
... mm/year [3]. The paleo-earthquakes and fault slip rates in this area are studied by means of trench excavation, dating, and scarp survey [4]. GPS measurements indicated that the active faults in this region move northward relative to Eurasia at a rate of 10-20 mm per year ( Figure 1) [5]. ...
... The seismic risk of the Chengnanhe fault is generally evaluated by using the tectonic analogy method. In eastern China, the largest earthquake magnitudes associated with the Middle Pleistocene fault range from 5 to 6 (Xiang HF et al., 2008). Specifically in Shandong Province, it is sug-gested that the maximum earthquake magnitudes induced by the Middle Pleistocene fault may be 5.5 (Wang ZC and Chao HT, 1999). ...
... Divergent opinions exist regarding the rupture length and segmentation of these earthquakes. Some models split the rupture fault into five segments based on surface rupture analysis, while others propose a threesegment model based on geometric shape and sliding mode (Han et al. 2008;Ou et al. 2020;Zhang et al. 2021). Here, we compare Coulomb stress changes under the 5-segment and 3-segment rupture models (Figure 7). ...
... Ostracode fossils collected from Limestone Conglomerate in the southeastern part of the Yuanjiang Basin constrain the age of the Limestone Conglomerate to the Miocene (Schoenbohm et al., 2005). Apatite fission track dating of the upper part of the Limestone Conglomerate indicated an age of 20.7 ± 2.4 Ma (Xiang et al., 2007). The Transitional Sandstones consist mainly of finegrained and pebble retention layers, and fossils are common within the fine-grained organic-rich layers. ...
... The narrow-sense Dayi fault is hidden at a depth beneath the east flank of the Dayi anticline [20], along which no offset of late Pleistocene to Holocene has been found on the surface, but where some traces of active folding are present. Thus, the inference is that this is a blind fault, active since the late Pleistocene and not reaching the surface [21]. Furthermore, the Shiyang and Xinkaidian faults, both lie in the 8 degree seismic region of the 2013 Lushan event, and no trace of activity in the late Quaternary has been observed. ...
... The coseismic deformation field of this earthquake was obtained using ascending and descending track data from Sentinel-1A, along with the two-pass differential interferometric measurement method. The processing of the experimental data was primarily carried out using the SARSCAPE commercial software platform (SARMAP, 2014). The method that combines ascending and descending track data with terrain features for automatic Ground Control Points (GCPs) selection was implemented on the MATLAB computational and programming software platform. ...
