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  1. Article ; Online: Quaternary Crustal Shortening of the Houyanshan Structure in the Eastern Chinese Tian Shan

    Xue Yang / Zhigang Li / Weitao Wang / Peizhen Zhang / Chuanyong Wu / Gan Chen / Lei Duan / Xiancan Wu / Kang Liu

    Remote Sensing, Vol 15, Iss 1603, p

    Constrained from Geological and Geomorphological Analyses

    2023  Volume 1603

    Abstract: The Tian Shan is one of the most active intracontinental orogenic belts in the world. It has undergone complex deformation that has resulted in the formation of several fold-and-thrust belts (FTBs) in the piedmonts and intermontane basins. Investigating ... ...

    Abstract The Tian Shan is one of the most active intracontinental orogenic belts in the world. It has undergone complex deformation that has resulted in the formation of several fold-and-thrust belts (FTBs) in the piedmonts and intermontane basins. Investigating the deformation histories of these FTBs is important for understanding the tectonic propagation processes of the Tian Shan. Here, we gain insight into these crustal shortening processes by deciphering the Houyanshan structure, a typical fold-thrust belt in the eastern Chinese Tian Shan. We first describe a curved thrust ramp and related fold pairs of the structure using high-resolution remote sensing photography, deformation of fluvial terraces, and field-based geological cross-section. Combined with deformed terrace records and optically stimulated luminescence (OSL) dating results, the kinematic style allows us to yield a geologic shortening rate of 1.6 ± 0.2 mm/a since ~52 ka. Second, to reduce uncertainty in the seismic interpretation and quantify the amount and time of crustal shortening, we interpret three seismic reflection profiles by using the theory of quantitative fault-related fold, area-depth-strain (ADS), and reverse modeling analyses. These profiles provide direct evidence that this structure connects by means of a listric thrust ramp to a shallow detachment level. ADS analysis reveals that the maximum shortening of the Huoyanshan structure is ~4.5 km, which is consistent with the result of quantitative inverse modeling. Each of the structural analysis methods gives similar parameters, and the high consistency of results greatly improves the soundness of a given geologic interpretation. Finally, the shortening rate and total shortening amount suggest that the structure may have formed at 1.8–3.7 Ma, which is nearly synchronous around the Tibetan Plateau. Together, these results indicate that this combined geological and geomorphological analysis provides greater insight into deformation information than can be achieved by any individual technique ...
    Keywords eastern Chinese Tian Shan ; listric thrust ; crustal shortening ; area-depth-strain analysis ; inverse modeling ; Science ; Q
    Subject code 550
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Late Quaternary Kinematics and Deformation Rate of the Huoyanshan Structure Derived From Deformed River Terraces in the South Piedmont of the Eastern Chinese Tian Shan

    Xue Yang / Chuanyong Wu / Zhigang Li / Weitao Wang / Gan Chen / Lei Duan

    Frontiers in Earth Science, Vol

    2021  Volume 9

    Abstract: The deformation pattern and strain partitioning in the Eastern Chinese Tian Shan are poorly known because of the lack of quantitative study of the kinematics and deformation rate of the major structure. Here we report a late Quaternary shortening rate ... ...

    Abstract The deformation pattern and strain partitioning in the Eastern Chinese Tian Shan are poorly known because of the lack of quantitative study of the kinematics and deformation rate of the major structure. Here we report a late Quaternary shortening rate for the most active reverse fault-and-fold in the Eastern Chinese Tian Shan. We quantified the kinematics and late Quaternary shortening rate of the Huoyanshan structure based on detailed high-resolution remote sensing image interpretations, field investigations and geological mapping. Six generations of folded terraces along the Tuyugou valley that showed the progressive folding process by the Huoyanshan structure were identified. A kinematic model of curved thrust fault propagation and folding allowed us to describe the terrace deformation pattern and subsurface fault geometry and calculate shortening across this structure. Combined with a regional age control of terrace T4 in the Tuyugou valley, a late Quaternary shortening rate of 2.0–3.2 mm/yr of the Huoyanshan structure was obtained. This is a relatively high shortening rate in the whole Eastern Chinese Tian Shan (roughly east of 88 E). This shortening rate of the Huoyanshan structure highlights that the ongoing India and Eurasia collision has affected the entire Tian Shan but shows two strain partitions: the main strain-absorption belt is located within the Eastern Chinese Tian Shan interior, but strain also occurs at the range-front foreland in the Western Tian Shan.
    Keywords Eastern Chinese Tian Shan ; Huoyanshan structure ; listric fault ; shortening rate ; strain partitioning ; Science ; Q
    Subject code 550
    Language English
    Publishing date 2021-05-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article: DEM generation from Worldview-2 stereo imagery and vertical accuracy assessment for its application in active tectonics

    Wang, Siyu / Zhikun Ren / Chuanyong Wu / Qiyun Lei / Wenyu Gong / Qi Ou / Huiping Zhang / Guangxue Ren / Chuanyou Li

    Geomorphology. 2019 July 01, v. 336

    2019  

    Abstract: The DEM-generation technology from high-resolution satellite imagery enables us to generate a wide range of high-resolution topographic data rapidly, improving the efficiency of data acquisition greatly. This method is more efficient than airborne Light ... ...

    Abstract The DEM-generation technology from high-resolution satellite imagery enables us to generate a wide range of high-resolution topographic data rapidly, improving the efficiency of data acquisition greatly. This method is more efficient than airborne Light Detection And Ranging (LiDAR) in terrain reconstruction, since satellite imagery covers a larger area without difficulties in field deployment. Previous researches evaluated the accuracy of DEMs generated from stereo imagery of different satellite sensors, however there is not enough quantitative analysis concerning the capability of satellite-based DEM in active tectonic studies. Therefore, in this paper, we presented a study to investigate the accuracy to measure heights of fault scarps using the DEM obtained from Worldview-2 stereo imagery and chose the Kumysh fault in the southern margin of Kumysh Basin (Eastern Tian Shan, China) as our test site. Point cloud data were obtained from stereo satellite imagery, both with and without GCPs respectively. Prior to the generation of the DEM, we compared the overall elevation differences of the point clouds and the fault scarp swaths. The overall elevation difference ranges from −1.2 to 0.4 m, with the mean value of −0.57 m, while the elevation difference of fault scarp swaths range from −1.1 to 0 m, with the mean value of −0.4 m. Afterwards, we generated a 0.5 m resolution DEM of 5-km swath along the Kumysh fault, measured the heights of fault scarps on different levels of alluvial fans, and compared the topographic profiles obtained from DEM and post-processed differential GPS (ppGPS) survey. Our results show that: (1) the elevation difference between the topographic profiles ranges from −2.82–4.47 m, the shape of the fault scarp can be accurately reconstructed by satellite-based DEM with the deviation of 0.29 m after elevation correction; (2) the accuracy of the height measurement of fault scarps can reach 0.25 m. These findings indicate that the DEM generated from Worldview-2 stereo imagery is capable of measuring relative deformed topographic features, which could be of great interest to professionals exploring the use and accuracy of satellite stereo imagery for active tectonic applications.
    Keywords basins ; data collection ; global positioning systems ; landscapes ; lidar ; professionals ; quantitative analysis ; remote sensing ; satellites ; surveys ; tectonics ; topography ; China
    Language English
    Dates of publication 2019-0701
    Size p. 107-118.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 58028-4
    ISSN 0169-555X
    ISSN 0169-555X
    DOI 10.1016/j.geomorph.2019.03.016
    Database NAL-Catalogue (AGRICOLA)

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  4. Article: Antigen detection based on background fluorescence quenching immunochromatographic assay

    Chen, Xiangjun / Chuanyong Wu / Hanling Zhuang / Jiatao Lou / Jinsheng Yu / Jiutong Li / Liqun Wang / Long Piao / Qiuliang Ji / Richard Head / Xuelei Zhou / Yajie Wang / Yangyang Xu / Yuan Ren / Zhengyi Huang

    Analytica chimica acta. 2014 Sept. 02, v. 841

    2014  

    Abstract: Gold immunochromatographic assay (GICA) has been around for quite a while, but it is qualitative in the vast majority of applications. A fast, simple and quantitative GICA is in call for better medicine. In the current study, we have established a novel, ...

    Abstract Gold immunochromatographic assay (GICA) has been around for quite a while, but it is qualitative in the vast majority of applications. A fast, simple and quantitative GICA is in call for better medicine. In the current study, we have established a novel, quantitative GICA based on fluorescence quenching and nitrocellulose membrane background signals, called background fluorescence quenching immunochromatographic assay (bFQICA). Using model analyte alpha-fetoprotein (AFP), the present study assessed the performance of bFQICA in numerous assay aspects. With serial dilutions of the international AFP standard, standard curves for the calculation of AFP concentration were successfully established. At 10 and 100ngmL−1 of the international AFP standard, the assay variability was defined with a coefficient of variance at 10.4% and 15.2%, respectively. For samples with extended range of AFP levels, bFQICA was able to detect AFP at as low as 1ngmL−1. Fluorescence in bFQICA strips stayed constant over months. A good correlation between the results from bFQICA and from a well-established Roche electrochemiluminescence immunoassay was observed in 27 serum samples (r=0.98, p<0.001). In conclusion, our study has demonstrated distinctive features of bFQICA over conventional GICA, including utilization of a unique fluorescence ratio between nitrocellulose membrane background and specific signals (F1/F2) to ensure accurate measurements, combined qualitative and quantitative capabilities, and exceptionally high sensitivity for detection of very low levels of antigens. All of these features could make bFQICA attractive as a model for antigen-antibody complex based GICA, and could promote bFQICA to a broad range of applications for investigation of a variety of diseases.
    Keywords analytical chemistry ; antigen detection ; antigen-antibody complex ; antigens ; blood serum ; detection limit ; electrochemiluminescence ; fluorescence ; immunoaffinity chromatography ; immunoassays ; medicine ; models ; variance
    Language English
    Dates of publication 2014-0902
    Size p. 44-50.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 1483436-4
    ISSN 1873-4324 ; 0003-2670
    ISSN (online) 1873-4324
    ISSN 0003-2670
    DOI 10.1016/j.aca.2014.07.025
    Database NAL-Catalogue (AGRICOLA)

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