Zijuan Dong , Baotian Pan , Zhenbo Hu , David Bridgland , Jun Wang , Rob Westaway , Menghao Li , Qinhong Mo , Xiaohua Li , Xilin Cao , Meiling Zhong , Renzhe Pan
{"title":"标示青藏高原东北缘的河流阶地的构造变形和运动学特征","authors":"Zijuan Dong , Baotian Pan , Zhenbo Hu , David Bridgland , Jun Wang , Rob Westaway , Menghao Li , Qinhong Mo , Xiaohua Li , Xilin Cao , Meiling Zhong , Renzhe Pan","doi":"10.1016/j.quascirev.2024.108978","DOIUrl":null,"url":null,"abstract":"<div><div>This paper reports on a study of the geometry and kinematics of numerous active faults within the Qilian Shan-Hexi Corridor area, which has provided valuable insights into regional deformation patterns. The Jintanan Shan faults are located at the northern end of the Hexi Corridor. In the Jintanan Shan range, five gaps have been excavated by rivers originating from the Qilian Shan, and have well-preserved fluvial terrace sequences in them, with evidence for deformation. Terrace profiles measured by the Differential Global Positioning System and ‘Structure-from-Motion’ processing were used to constrain the fold deformation, and a fault-related fold model was applied to estimate mountain growth and deformation kinematics. Using the geometry of the faults, as well as optical stimulated luminescence (OSL) dating and <sup>10</sup>Be exposure dating control for the terraces, the rates of crustal shortening, vertical uplift and fault slip show estimated ranges of 0.19–1.35 mm/a, 0.21–2.14 mm/a and 0.29–2.27 mm/a, respectively, since ∼159 ka. The geometry and kinematics of the Jintanan Shan faults enable us to estimate the deformation pattern in the northern Hexi Corridor, which indicates that this area is undergoing northeastward compression relative to the northern Tibetan Plateau (Qilian Shan). Active faults in the region are principally driven by the northeastward push of the Tibetan Plateau, with the eastward extension of the Altyn Tagh fault probably playing a coordinated role.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"344 ","pages":"Article 108978"},"PeriodicalIF":3.2000,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Tectonic deformation and kinematics of fluvial terraces marking the northeastern margin of the Tibetan Plateau\",\"authors\":\"Zijuan Dong , Baotian Pan , Zhenbo Hu , David Bridgland , Jun Wang , Rob Westaway , Menghao Li , Qinhong Mo , Xiaohua Li , Xilin Cao , Meiling Zhong , Renzhe Pan\",\"doi\":\"10.1016/j.quascirev.2024.108978\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This paper reports on a study of the geometry and kinematics of numerous active faults within the Qilian Shan-Hexi Corridor area, which has provided valuable insights into regional deformation patterns. The Jintanan Shan faults are located at the northern end of the Hexi Corridor. In the Jintanan Shan range, five gaps have been excavated by rivers originating from the Qilian Shan, and have well-preserved fluvial terrace sequences in them, with evidence for deformation. Terrace profiles measured by the Differential Global Positioning System and ‘Structure-from-Motion’ processing were used to constrain the fold deformation, and a fault-related fold model was applied to estimate mountain growth and deformation kinematics. Using the geometry of the faults, as well as optical stimulated luminescence (OSL) dating and <sup>10</sup>Be exposure dating control for the terraces, the rates of crustal shortening, vertical uplift and fault slip show estimated ranges of 0.19–1.35 mm/a, 0.21–2.14 mm/a and 0.29–2.27 mm/a, respectively, since ∼159 ka. The geometry and kinematics of the Jintanan Shan faults enable us to estimate the deformation pattern in the northern Hexi Corridor, which indicates that this area is undergoing northeastward compression relative to the northern Tibetan Plateau (Qilian Shan). Active faults in the region are principally driven by the northeastward push of the Tibetan Plateau, with the eastward extension of the Altyn Tagh fault probably playing a coordinated role.</div></div>\",\"PeriodicalId\":20926,\"journal\":{\"name\":\"Quaternary Science Reviews\",\"volume\":\"344 \",\"pages\":\"Article 108978\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2024-09-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Quaternary Science Reviews\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0277379124004797\",\"RegionNum\":1,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOGRAPHY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Quaternary Science Reviews","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0277379124004797","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOGRAPHY, PHYSICAL","Score":null,"Total":0}
Tectonic deformation and kinematics of fluvial terraces marking the northeastern margin of the Tibetan Plateau
This paper reports on a study of the geometry and kinematics of numerous active faults within the Qilian Shan-Hexi Corridor area, which has provided valuable insights into regional deformation patterns. The Jintanan Shan faults are located at the northern end of the Hexi Corridor. In the Jintanan Shan range, five gaps have been excavated by rivers originating from the Qilian Shan, and have well-preserved fluvial terrace sequences in them, with evidence for deformation. Terrace profiles measured by the Differential Global Positioning System and ‘Structure-from-Motion’ processing were used to constrain the fold deformation, and a fault-related fold model was applied to estimate mountain growth and deformation kinematics. Using the geometry of the faults, as well as optical stimulated luminescence (OSL) dating and 10Be exposure dating control for the terraces, the rates of crustal shortening, vertical uplift and fault slip show estimated ranges of 0.19–1.35 mm/a, 0.21–2.14 mm/a and 0.29–2.27 mm/a, respectively, since ∼159 ka. The geometry and kinematics of the Jintanan Shan faults enable us to estimate the deformation pattern in the northern Hexi Corridor, which indicates that this area is undergoing northeastward compression relative to the northern Tibetan Plateau (Qilian Shan). Active faults in the region are principally driven by the northeastward push of the Tibetan Plateau, with the eastward extension of the Altyn Tagh fault probably playing a coordinated role.
期刊介绍:
Quaternary Science Reviews caters for all aspects of Quaternary science, and includes, for example, geology, geomorphology, geography, archaeology, soil science, palaeobotany, palaeontology, palaeoclimatology and the full range of applicable dating methods. The dividing line between what constitutes the review paper and one which contains new original data is not easy to establish, so QSR also publishes papers with new data especially if these perform a review function. All the Quaternary sciences are changing rapidly and subject to re-evaluation as the pace of discovery quickens; thus the diverse but comprehensive role of Quaternary Science Reviews keeps readers abreast of the wider issues relating to new developments in the field.