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Late Quaternary fluvial terrace formation in the Luan river drainage basin,north China and its possible linkages with climate change and tectonic activation

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China Geology 2023年第3期6卷 395-408页

作者： Yu-chen Tian Xu-jiao Zhang Zhi-qiang Yin Hai Shao Ming-xu Gu Yingying-Ding Chao Peng Xiang-ge Zhang School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing 100083China China institute of Geo-Environment Monitoring China Geological SurveyMinistry of Natural ResourcesBeijing 100081China Hebei geological environment monitoring Institute Shijiazhuang 050021China

The Luan river is the most important water system in north-eastern Hebei Province,China and is located in the transitional zone of the Eastern Yan Mountains,North China Plain and Songliao *** well-developed river terraces of its tributary,the Yixun river,provide excellent information for studying neotectonics and climate *** are seven terraces in the lower reaches of the Yixun river,numbered *** optically stimulated luminescence dating results of 23 samples show that terraces T7-T2 formed at 111.36±5.83 ka,78.20±4.45 ka,65.29±4.15 ka,56.44±3.07 ka,40.08±2.66 ka,and 13.14±0.76 ka,respectively.A comparison with the oxygen isotope curves of deep-sea sediments reveals that the sediment formation of each terrace corresponded to cold periods of marine isotope stages MIS 4 and MIS 2 and the relatively cold periods of MIS 5e,MIS 3,and MIS *** the Late Pleistocene,the incision rate of the Yixun river has ranged from 0.371-1.740 mm/*** the formation of T7-T6,T5-T4,T4-T3,and T3-T2,the incision rate was ***,in the two stages during which T6-T5 and T2-T1 formed(13.14±0.76 ka to 0.58±0.08 ka and 10.79±0.64 ka to 0.16±0.01 ka),these rates reached 1.554 mm/a and 1.592-1.740 mm/a,*** approximately 30 ka,the activity of the Langying Fault increased,leading to footwall *** river gathered in the north of Langying to form the ancient Erdaowan Lake,which resulted in the drying of the river in the lower reaches of the Yixun river during the last glacial maximum without forming river *** the Early Holocene,headward erosion in the lower reaches of the Yixun river was enhanced,which resulted in the disappearance of the lake,and incised meandering formed due to increased *** on the analyses of river incision and the formation of ancient lakes and incised meandering,it was inferred that there have been three periods of strong tectonism in the river basin since the Late Pleistocene.

关键词： river terrace Paleoclimate change Tectonic activation Optically stimulated luminescence dating Marine isotope stage Last glacial maximum Neotectonics Geomorphology Geological survey engineering North China Plain

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terrace dating as an archive of the run-through of the Sanmen Gorges

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Progress in Natural Science:Materials International 2005年第12期15卷 1096-1103页

作者： PAN Baotian,WANG Junping,GAO Hongshan,CHEN Yingying,LI Jijun and LIU Xiaofeng Key Laboratory of Western China’s Environmental Systems,Ministry of Education,and Department of Geography,Lanzhou University,Lanzhou 730000,China Key Laboratory of Western China''s Environmental Systems Ministry of Education China. Department of Geography Lanzhou University Lanzhou 730000 China

Analysis of morphological properties in the Sanmen Gorges region of the Yellow river shows that four river terraces have been developed at the entrance to the ***,thick aeolian loess-paleosol sequence was deposited on the terraces,which makes it easy to date the *** dating of paleomagnetic,loess-paleosol sequence matching and thermoluminescence show that terraces T2,T3 and T4 were formed 0.129 Ma,0.625 Ma and 0.865 Ma ago,*** formation of these terraces in this region indicates that the Yellow river has experienced four intensive downcutting events during the last 0.9 *** Yellow river cut through the Sanmen Gorges and inpoured into the East China Sea no later than 0.865 Ma.

关键词： river terrace paleomagnetic dating Yellow river loess

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Fluvial terraces and their implications for Weihe river valley evolution in the Sanyangchuan Basin

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Science China Earth Sciences 2017年第3期60卷 413-427页

作者： GAO HongShan LI ZongMeng LIU XiaoFeng PAN BaoTian WU YaJie LIU FenLiang Key Laboratory of Western China's Environmental System Ministry of EducationCollege of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China Lanzhou Institute of Seismology China Earthquake AdministrationLanzhou 730000China

Fluvial terraces are important geomorphic markers for modern valley *** coupled with numeric ages,terraces can provide abundant information about tectonic,climatic,paleohydrological and the paleoenvironmental *** the basis of the paleomagnetic,electron spin resonance(ESR) and optically stimulated luminescence(OSL) dating,in addition to an investigation of local loess-paleosol sequences,we confirmed that 13 fluvial terraces were formed,and then preserved,along the course of the Upper Weihe river in the Sanyangchuan Basin over the past 1.2 *** of the characteristics and genesis of these terraces indicate that they resulted from the response of this particular river system to climate change over an orbital *** changes can further be placed within the context of local and regional tectonic uplift,and represent an alternation between lateral migration and vertical incision,dependent upon the predominance of climatic and tectonic controls during different *** of the terraces are strikingly similar in that they have several meters of paleosols which have developed directly on top of fluvial deposits located on the terrace treads,suggesting that the abandonment of terraces due to river incision occurred during the transitions from glacial to interglacial *** temporal and spatial differences in the distribution patterns of terraces located on either side of the river valley indicate that a tectonic inversion occurred in Sanyangchuan Basin at-0.62 Ma,and that this was characterized by a transition from overall uplift to depression induced by fault *** studies of the Basin's terraces indicate that formation of the modern valley of the Upper Weihe river may have begun in the late Early Pleistocene between1.4-1.2 Ma.

关键词： river terrace Valley evolution Tectonic activity Climate change Sanyangchuan Basin

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The Phytolith and Pollen Record since 10 ka BP from the Lhasa Region, Tibet

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Acta Geologica Sinica(English Edition) 2013年第2期87卷 588-606页

作者： CHEN Lingkang CHEN Haixia WANG Baodi WU Kaixing YU Jianxin GU Yansheng RUAN Linsen XIA Baoben XIN Zhonglei Faculty of Resource and Environmental Engineering Jiangxi University of Science and Technology School of Metallurgy and Chemical Engineering Jiangxi University of Science and Technology Chengdu Center China Geological Survey State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of Sciences Faculty of Earth Sciences China University of Geosciences School of Environment studies China University of Geosciences Tibet Institute of Geological Survey

This paper presents a description of the river terrace at Tangjia Village in Lhasa, Tibet. Selected types of phytolith and pollen were used as proxies to study the paleoclimate in the study area. Ancient climate and vegetation changes since 10 ka BP were examined. The results demonstrated that between 10.2 and 8.9 ka BP, the dominating phytolith was the cold type and the dominating vegetation type was grassland-forest. This indicated that the climate changed from cool-humid to cool-dry and later turned back into a cool-humid climate. Between 8.9 and 8.1 ka BP, the main types of phytoliths were tooth, dumbbell, and polyhedral. This suggests that the vegetation consisted of forest-grassland and the period＇s climate had become warmer. Between 8.1 and 6.7 ka BP, the warm index of phytolith assembelage gradually increased, whereas the spore and pollen assembelage revealed that the vegetation was forest with hardwood. This suggested that the paleoclimate was warmest in this period. The herbaceous vegetation increased gradually, indicating that the climate had become colder since 7.5 ka BP. Between 6.7 and 4.6 ka BP, cold type phytolith such as tooth and cap were found. Simultaneously, the pollen assembelage indicated that the vegetation shifted from grassland to forest and then turned back into grassland. This implies that the climate fluctuated from cold-dry to cool- humid. Between 4.6 and 1.9 ka BP, the dominate type of phytolith was cold type and its warm index was in the range 0.04-0.28, suggesting a herbaceous vegetation cover and indicating that the climate was cold. The phytolith warm index from 1.9 ka BP revealed that the climate was continuously decreasing, and most of the pollen assembelage consisted of Chenopodiaceae and Artemisia. This conclusion is in agreement with the phytolith result that indicates that the climate was becoming colder and colder.

关键词： Phytolith pollen river terrace Lhasa Tangjia

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Late Pleistocene sedimentary sequences and paleoclimate changes in Xunhua basin in the upper reach of Yellow river in China

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Frontiers of Earth Science 2012年第3期6卷 297-305页

作者： Fang HAN Kexin ZHANG Junliang JI Yadong XU Fenning CHEN Xiaohu KOU Faulty of Earth Sciences China University of GeosciencesWuhan 430074China State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan 430074China Xi'an Institute of Geology and Mineral Resources Xi'an 710054China

The third terrace of the Yellow river was well developed in Xunhua basin in the north-east margin of the Tibetan Plateau. The terrace was formed at ca 75 ka as dated by the optically stimulated luminescence （OSL） method. On the basis of grain size, magnetic susceptibility and palynological data, six episodes of the climatic change were identified in Xunhua basin; they include very warm and humid period during 120-114 ka, cool and dry period during 114-105 ka, warm and humid period during 105- 98 ka, gradually cooling period during 98-85 ka, warm and humid period during 85-75 ka, very cold and dry period during 75-63 ka. The six stages of climatic change recorded in Xunhua basin correspond to the marine oxygen isotope stages （MIS） of 5e, 5d, 5c, 5b, 5a and 4, respectively.

关键词： sedimentary sequences river terrace Xunhuabasin Tibetan Plateau Late Pleistocene paleoclimaticchange

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Formation of the Yalong Downstream terraces in the SE Tibetan Plateau and Its Implication for the Uplift of the Plateau

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Acta Geologica Sinica(English Edition) 2015年第2期89卷 542-560页

作者： HE Zexin ZHANG Xujiao QIAO Yansong BAO Shuyan LU Chunyu HE Xiangli School of the Earth Sciences and Resources China University of Geosciences Institute of Geomechanics Chinese Academy of Geological Sciences Key Laboratory of Neotectonic Movement and Geohazard

The Yalong river is an important river that runs across the abruptly changing terrain of the SE Tibetan Plateau. The terraces and Quaternary sediments in its valleys preserve the information of tectonic uplift, climate changes, and landform evolution since the Middle Pleistocene. Based on geomorphological, sedimentological, and chronological investigations, 6-8 terraces are identified in the lower reaches of Yalong catchment and its tributary--the Anning river. The electron spin resonance （ESR） or optically stimulated luminescence （OSL） data on the alluvial sediments in the upper portion of terraces indicate that they formed in 1.10, 0.90, 0.72, 0.06-0.04, 0.03-0.02, and 0.01 Ma. Tectonic uplift and the climatic cycle controlled the formation of the Yalong river terraces. The former dominated the dissection depths and incision rates, whereas the latter controlled the transformation between accumulation, which developed during the glacial period, and incision, which developed during the glacial-interglacial transition. The Yalong downstream incised rapidly from 1.10 to 0.72 Ma and rapidly from 0.06 Ma until the present; the terraces developed during these two periods. The incision rates in space during the two periods indicate the uplifting extent of the Jinpingshan area, which decreases toward the east and the south. The results reveal two rapidly uplifting stages in the SE Tibetan Plateau, including an accelerated uplifting since 0.06 Ma. Since the Middle Pleistocene, the tectonic uplift of the SE and NE parts of the Tibetan Plateau is synchronous, according to the same development stages of the river terraces of the Yalong downstream and the Yellow river in the Lanzhou area of the NE Tibetan Plateau. The difference in the horizontal displacement between the Xianshuihe Fault and the Anninghe Fault bend resulted in the rapid uplift of the Jinpingshan area. The incision rate for the spatial distribution of the Yalong downstream is the geomorphologicai response of cru

关键词： Yalong downstream Anning river river terrace tectonic uplift climate change the Tibetan Plateau

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Late Cenozoic Geomorphology, Geochronology and Physiography of Yuntaishan in Southern Taihang Mountain, North China

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Acta Geologica Sinica(English Edition) 2010年第1期84卷 230-239页

作者： WU Zhonghai ZHAO Xitao MA Yinsheng ZHAO Xun ZHAO Ting YANG Shouzheng GAO Linzhi Institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Chinese Academy of Geological Sciences Beijing 100037 China Institute of mineral resources Chinese Academy of Geological Sciences Beijing 100037 China The 2nd geological team Henan bureau of geology and mineral resources Jiaozuo 454002 China Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China

The late Cenozoic geomorphic features and geochronologic data of the Zhingfang river catchment in the Yuntaishan World Geopark are studied. Several quarternary geochronologic methods, including electron spin resonance （ESR）, optically stimulated luminescence （OSL）, thermo-luminescence （TL） and U-series are presented in this paper. The results suggest that there are two planation surfaces, named as the Taihang surface which is a peneplain of Taihang stage formed during Oligocene or Oligocene to early-middle Miocene period, and Tang-hien surface which is a mature wide valley of Tang-hien stage formed during late Miocene-Pliocene or Piiocene-early Pleistocene period and probably ended prior to 2.2-2.6 Ma based on ESR dating. After the Tang-hien stage, the incision and aggradation of the river formed six stream terraces with heights of 3-5 m, 8-12 m, 22-24 m, 28-38 m, 50-62 m and 80-85 m above the river bottom, respectively. The dating results of the alluvium sediments suggest that these terraces were formed during Holocene, 20-23 ka B.P., 110-120 ka B.P., 200-240 ka B.P., 840-1200 ka B.P. or ~450 ka B.P. and 1600-1800 ka B.P. or -1100 ka B.P., respectively. These results indicate that episodic incision of the river, which controls the formation of the scenery in the Yuntaishan World Geopark, was mainly influenced by the periodic dry-wet climate change during late Cenozoic mountain uplift.

关键词： geomorphology geochronology planation surface river terrace late Cenozoic,southern Taihang Mountains North China

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STUDIES ON terraceS AND river SYSTEM CHANGES OF THE UPPER YELLOW river

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Journal of Geographical Sciences 1997年第2期7卷 45-52页

作者： Wu Shengguang Yang Dayuan Department of Geography, Nanjing University, Nanjing 210093 People’s Republic of ChinaWang Yunfei Nanjing Institute of Geography and Limnology, Academia Sinica, Nanjing 210008 People’s Republic of China

There are seven steps of terrace both in the Guide basin and Gonghe basin along the Yellow river. More close to the source, less the steps of terrace. Three ancient terraces are found in Gonghe basin. The upper reaches of the Yellow river was joined up by a series of stream captures at different periods of time, the ancient Yellow river linked up the Gonghe basin and Guide basin at the end of the middle Pleistocene, the Longyangxia gorge developed around 60 Ka.B.P., and the gorge between Maqu and Tangnag developed around 20 Ka.B.P.

关键词： the upper reaches of Yellow river river terrace river system changes.

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No late Quaternary deformation across the Tuostai anticline of the proximal fold-and-thrust belt in the northern Chinese Tian Shan foreland

No late Quaternary deformation across the Tuostai anticline ...

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2016中国地球科学联合学术年会

作者：吕红华程璐王振张天琪郑祥民李有利华东师范大学地球科学学部 The Institute of Earth and Environmental Science University of Potsdam 北京大学地表过程与模拟教育部重点实验室

The India-Asia collision occurring during the early Cenozoic is a very spectacular scene in the evolution history of the *** geological process has driven deformation exerting a dominant control on the tectonic and topographic patterns of Central Asia,including western *** response to the collision,the Tian Shan has been tectonically reactivated and intensely *** history of growth and propagation of the modern Tian Shan is thus crucial to understand the mechanism of tectonic deformation of orogenic belts in the interior of Asia in relation to the India-Asia *** encroachment of the Tian Shan range into its foreland basins due to crustal shortening has resulted in formation of several thick-skinned fold-and-thrust belts,which geomorphologically comprise a series of hills sub-parallel to the *** initiation and magnitude of folding in foreland basins of the Tian Shan have been constrained by low-temperature thermochronologic,structural,sedimentologic and magnetostratigraphic investigations on Cenozoic sedimentary strata comprising the *** least in the northern Chinese Tian Shan foreland,the synthetic data show that the initial deformation has progressively migrated ***,the history of Quaternary anticlinal deformation of the proximal structures remains unclear,although active deformation of the anticlines in the distal structure belts has been revealed using geomorphologic *** hinder us to better understand the detailed character and sequence of tectonic deformation of orogenic belts like the Tian *** terraces can provide important information on tectonic deformation in a foreland setting by characterizing the longitudinal profile of terraces or the pattern of river incision across active mountain ***,other factors like climate and lithology may complicate tectonic interpretation of fluvial terrace *** we document aggradation and incision processes of the Sikeshu river,

关键词： river terrace tectonic activation climate change the Tian Shan

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