Seismological Bureau of Xinjiang Uygur Autonomous Region

Urunchi, China

Seismological Bureau of Xinjiang Uygur Autonomous Region

Urunchi, China
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Wu J.,Academy of Agriculture Science | Wu J.,Xinjiang Shihezi Vocational Technical College | Gao X.,Seismological Bureau of Xinjiang Uygur Autonomous Region | Zeng J.,Xinjiang University | And 3 more authors.
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2011

Seismic fault belt is a main passageway of various kinds of gas and geochemistry elements, where are important zone for matters, energy and information transfer between lithosphere and atmosphere. Microbes living in the belt effected intensively by the hydrogeochemical changes caused by earth crust movement. The 10th spring of Urumq originates from Bogeda mountain of Tianshan mountain range, and the groundwater runoff in seismic fault belt. The spring water contains various geochemistry elements, such as sulfide, methane, hydrogen, radon, sulfide, methane, carbon dioxide, helium, fluorine and hydrarg et al, many of which may potentially act as electron donors capable of supporting chemolithotrophy-based primary production. In order to reveal the impact of hydrogeochemical changes to bacterial community in seismic fault belt spring water, thirty-one samples of spring water collected from October 12th to November 11th and their corresponding geochemial parameters were determined. Of them, ten samples were used for bacterial dynamic changing monitoring. The planktonic communities were collected by microporous membrane filtration and then total DNA were extracted by SDS-enzymatic disruption method. The V3 region of the 16S rDNA gene of those samples was analyzed by PCR-DGGE (Denaturing Gradient Gel Electrophoresis) and different bands were excised for sequencing. The DGGE fingerprints combined with hydrogeochamical parameters were analyzed by CCA (Canonical correspondence analysis). The results showed that B16 (Uncultured bacterium) and epsilon proteobacterium were positive correlate to Fluorine fluctuation and clustered as group one and two, respectively; B1 (Flavobacterium), Pseudomonas aeruginosa, B10 (Uncultured bacterium) and Staphylococcus saprophyticus were positive correlate to sulfide change; Thiomicrospira arctica,B3 (Flavobacterium)aand Staphylococcus arlettae were positive correlated to hydrogen content. The result indicated that bacterial communities in seismic fault belt spring water could response sensitively to hydrogeochemical parameter changes, and this may provide a novel means for crust movement monitoring and earthquake forecast.

Liu J.,Seismological Bureau of Xinjiang Uygur Autonomous Region | Li Z.,China Earthquake Administration | Song L.,Seismological Bureau of Xinjiang Uygur Autonomous Region | Tan M.,Seismological Bureau of Xinjiang Uygur Autonomous Region | Li H.,Seismological Bureau of Hetian
World Information on Earthquake Engineering | Year: 2016

At 2014-02-12T17: 19:00 (Beijing time), a magnitude 7.3 earthquake occurred in Yutian County, Xinjiang Uygur Autonomous Eegion. According to the field survey, the highest intensity of this earthquake is Intensity 9.The disaster area suffered from 2008 Yutian-Qira M7.3 earthquake disaster effect seriously. In recent 6 years after the Yution-Qira earthquake, the Project “Safe Residence and Richening People” promoted greatly plays an important role and is the important reason that this time of earthquake did not bring about casualties. Through the project “Safe Residence and Richening People”, it can be seen that due to higher housing covering rate in disaster area, the economic loss of residential house reduces by 380 million yuan RMB, the expenditure for recovery and veconstruction reduces by 1290 million Yuan RMB and the households missing residence reduce 10 thousand households. © 2016, Science Press. All right reserved.

Wu C.,Institute of Geology | Wu G.,Seismological Bureau of Xinjiang Uygur Autonomous Region | Shen J.,Institute of Disaster Prevention | Dai X.,Institute of Disaster Prevention | And 2 more authors.
Journal of Asian Earth Sciences | Year: 2016

The Bogda mountain range is the highest range among the northern Tian Shan mountains. Based on geologic and geomorphologic field surveys, trench excavation and optically stimulated luminescence (OSL) dating, we targeted the active Fukang fault along the Bogda mountain range and identified the late Quaternary deformation characteristics of this area. We found that the Fukang fault dislocated different geomorphic surfaces of the northern Bogda piedmont. The vertical fault displacement corresponds to the topographic relief of the Bogda over long time scales. Since the late Quaternary, the crustal shortening rate was estimated to be 0.90. ±. 0.20. mm/yr, which is less than that of the western segment of the northern Tian Shan. We interpret the Bogda fold and thrust belt to be a thick-skinned structure, since a high angle thrust fault bounds the Bogda mountain range and the foreland basin. The deformation characteristics of this region have been dominated by vertical uplift, and the component of propagation toward the basin has been very limited. This tectonic deformation is evidenced as vertical growth. Although the deformation rate is small, the uplift amplitude is very significant in this region. © 2016 Elsevier Ltd.

Fan F.,China Railway Bridge Bureau Group Co. | Xu S.,Wuhan University | Luo J.,Wuhan University | Liu D.,Seismological Bureau of Xinjiang Uygur Autonomous Region
Journal of Geomatics | Year: 2010

The theory and process of data processing and deformation analysis of a GPS deformation monitoring network in a dam are presented with actual example of engineering, which include static baseline solution, GPS monitoring network adjustment, the stability analysis of reference points and deformation analysis. The data obtained through GPS technology is used to analyse the deformation of a dumping body and some useful conclusions are given.

Wu C.-Y.,China Earthquake Administration | Zhang Z.-Q.,China Earthquake Administration | Zhao C.-P.,China Earthquake Administration | Wu G.-D.,Seismological Bureau of Xinjiang Uygur Autonomous Region | And 5 more authors.
Chinese Journal of Geophysics (Acta Geophysica Sinica) | Year: 2014

The Bayankala tectonic-block, located in the north of the Tibetan Plateau, is the most active area of strong earthquakes in recent years. A series of strong earthquakes occurred around the block since 1997. The Yutian MS7.3 earthquake of 2014 occurred in the southern margin of the Xiaoerkule basin, which is located on the west boundary of the Bayankala tectonic-block. This area is the intersection site of the Altyn Tagh fault, the Karakax fault and the Eastern Kunlun fault, which are all large strike-slip active fault zones in different directions. The sudden change in direction and rate distribution of the Altyn Tagh fault lead to the formation of local tensile stress characteristics in the region, forming sinistral-normal fault with NE and SN strike. By analyzing the aftershocks distribution and focal mechanism solution results, we conclude that the seismogenic structure of this earthquake is the Xiaoerkule fracture, a secondary fault of the Altyn Tagh fault southwest segment. The earthquake rupture is characterized by sinistral strike slip normal fault. The north and east boundaries of the Bayankala tectonic-block have shown block eastward extrusion displacement of about 7 m during the strong earthquakes, but the amount of stretch of the west boundary of the block is apparently inconsistent. The Yutian MS7.3 earthquake is the structural response and strain adjustments of the Bayankala tectonic-block to the eastward extrusion. ©, Science Press. All right reserved.

Shen J.,Seismological Bureau of Xinjiang Uygur Autonomous Region | Wang Y.,China Earthquake Administration | Li Y.,Seismological Bureau of Xinjiang Uygur Autonomous Region
Geoscience Frontiers | Year: 2011

The characteristics of the Bolokenu-Aqikekuduk (Bo-A) fault, a right-lateral strike-slip fault that runs for more than 700 km long and obliquely cuts North Tianshan Mountains, are evaluated here based on remote sensing data, and through an analysis of the results from field investigations as well as climate-geomorphic events. The fault is composed of a western segment with a NW strike and an eastern segment with a NWW strike. The western segment is nearly 250 km long, extending northwestward into Kazakhstan with a right-lateral strike-slip rate of 5 mm/a. This domain consists of 4-5 rupture sections, with 3-4 deformation belts, caused by ancient or historical earthquakes, and suggesting the potential for the occurrence of further strong earthquakes (with M ≈ 7.5) in future. The eastern segment of the fault shows a right-lateral strike-slip rate of 1-1.4 mm/a, with the development of 3-4 deformation belts caused by ancient or historical earthquakes, and with a potential for future strong earthquake with M ≈ 7.0. A typical strain partitioning style in the compression area has developed between the intermontane Bo-A fault and the piedmont thrust structures of Northern Tianshan Mountains, under the effect of oblique compression, as indicated by the piedmont thrust structure and the strike-slip fault in the mountains. © 2011, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.

Wu C.-Y.,Seismological Bureau of Xinjiang Uygur Autonomous Region | Chen J.-B.,Seismological Bureau of Xinjiang Uygur Autonomous Region | Shen J.,Seismological Bureau of Xinjiang Uygur Autonomous Region | Song H.-P.,Seismological Bureau of Xinjiang Uygur Autonomous Region | And 2 more authors.
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | Year: 2013

In order to understand the activity characteristics of the Fukang fault in Late-Quaternary, and accurately estimate the seismic hazard of the fault, a geological survey has been conducted along the Fukang fault. By surveying the deformation micro-topography, excavating two large paleoearthquake trenches, and dating a series of samples of thermoluminescence, the quantity activity characteristics of the Ganhezi fault segment of the Fukang fault belt are revealed. The Ganhezi fault segment is a Holocene active fault, with a total length about 33 km. The fault activity is obvious, generating a series of apparent geomorphic traces on the surface. Since the Late-Quaternary, the average vertical slip rate of fault is about 0.34-0.43 mm/a. Since the Mid-Holocene, there were two paleoearthquake events; the strong earthquake recurrence period of the fualt segment is about 2 100-3 750 a. The vertical surface displacement is about 1.5 m and the elapsed time is 4.11 ka of the latest paleoearthquake, corresponding to the paleoearthquake magnitude of between Ms7.2-7.4. The fault has accumulated a high energy so far.

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