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Significant lake expansion has accelerated permafrost degradation on the Qinghai-Tibet Plateau

Journal of Mountain Science 2024年第1期21卷 68-83页

作者： LI Qingpeng LIU Wenhui LIU Hairui ZHOU Guanghao song xianteng LI Qing LUO Bingnan song Bangxu ZHANG Qi Department of Geological Engineering Qinghai UniversityXining 810016China College of Eco-Environmental Engineering Qinghai UniversityXining 810016China Xining Center for Integrated Natural Resources Survey China Geological SurveyXining 810000China

In recent years, lakes on the Qinghai-Tibet Plateau have become more responsive to climate change. In September 2011, Zonag Lake in Hoh Xil experienced sudden drainage, the water eventually flowed into Yanhu Lake, which caused Yanhu Lake to continue to expand. The potential collapse of Yanhu Lake could directly threaten the operational safety of the adjacent Qinghai-Tibet Highway, Qinghai-Tibet Railway. To explore the implications of expanding lakes on the surrounding permafrost, we selected Hoh Xil Yanhu Lake on the Qinghai-Tibet Plateau to study the effect of lake expansion on permafrost degradation. The permafrost degradation in the Yanhu Lake basin from October 2017 to December 2022 was inverted using Sentinel-1 satellite image data and small baseline subset interferometry synthetic aperture radar(SBAS-In SAR) technology. Additionally, permafrost degradation from February 2007 and February 2010 was analyzed using advanced land observing satellite phased array-type L-band synthetic aperture radar(ALOS PALSAR) satellite images and differential interferometric synthetic aperture radar(D-In SAR) technique. The results showed that the permafrost around Yanhu Lake experienced accelerated degradation. Prior to the expansion of Yanhu Lake, the average annual deformation rate along the line of sight(LOS) direction was 6.7 mm/yr. After the expansion, the rate increased to 20.9 mm/yr. The integration of spatial-temporal distribution maps of surface subsidence, Wudaoliang borehole geothermal data, meteorological data, Yanhu Lake surface area changes, and water level changes supports the assertion that the intensified permafrost degradation could be attributed to lake expansion rather than the rising air temperature. Furthermore, permafrost degradation around Yanhu Lake could impact vital infrastructure such as the adjacent Qinghai-Tibet Highway and Qinghai-Tibet Railway.

关键词： Lake expansion SBAS-InSAR D-InSAR Permafrost deformation Qinghai-Tibet Plateau

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A local rainfall-triggered giant landslide occurred in a region along a high-speed railway on the Qinghai‒Tibetan Plateau

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Journal of Mountain Science 2024年第9期21卷 2939-2955页

作者： LI Qingpeng LIU Wenhui HE Renjie YING Chunye LIU Hairui DOU Zengning LIU Yabing YANG Sha song xianteng School of Geological Engineering Qinghai UniversityXining 810016China Key Lab of Cenozoic Resource and Environment in North Margin of the Tibetan Plateau Qinghai UniversityXining 810016China College of Eco-Environmental Engineering Qinghai UniversityXining 810016China Qinghai Transportation Planning and Design Institute Co Ltd Xining 810000China Xining Center for Integrated Natural Resources Survey China Geological SurveyXining 810000QinghaiChina

An increasing number of geological hazards along high-speed railways on the Qinghai‒Tibetan Plateau have occurred and have resulted in a profound influence on old infrastructure,which has attracted increasing *** landslide event that occurred on September 15,2022,in Jiujiawan village,Xining city,Qinghai Province,is a typical *** on field investigations and remote sensing interpretations,a comprehensive analysis was conducted on the ***,the potential secondary failure of the current Jiujiawan landslide was assessed using Fast Lagrangian Analysis of Continua in Three Dimensions(FLAC3D).Based on the application of the small baseline subset-interferometric synthetic aperture radar(SBAS-InSAR)technique to SAR images from February 24,2017 to September 14,2022,a significant westward horizontal deformation was found to have been formed prior to the occurrence of the *** maximum annual average deformation rate in the line of sight(LOS)direction reached-45 mm/yr,with a maximum cumulative deformation of-178 *** value was consistent with the continual increase in annual precipitation(2.51 mm/yr)prior to the occurrence of the *** accumulated precipitation before the landslide was 279.8 mm,accounting for 54.2%of the total annual precipitation,with a particularly notable surge in monthly precipitation observed during August(250.3 mm).Additionally,the occurrence of a seismic event with a magnitude of Ms 6.9 in Menyuan County,80 km away from Xining,could be a potential triggering factor to the landslide,as evidenced by an abrupt subsidence alteration observed prior to and following the *** maximum subsidence in the line of sight(LOS)direction exceeded 11 mm,exhibiting a highly consistent spatial distribution with the occurrence range of *** results suggest that the Jiujiawan landslide was likely induced by earthquake events in the early stage and heavy rainfall in the later *** FLAC3D numerical

关键词： Landslide Development characteristic Driver Mudstone Xining Basin

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柴达木盆地诺木洪贝壳堤水体演变的介形类证据

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现代地质 2022年第1期36卷 14-26页

作者：李玮屈海英李莎周淑敏宋先腾王晓楠青海大学地质工程系青海西宁810016 四川省雅安生态环境监测中心站四川雅安625000 中国科学院南京地质古生物研究所江苏南京210008 中国地质调查局西宁自然资源综合调查中心青海西宁810000 中国地质大学(北京)地球科学与资源学院北京100083

柴达木盆地贝壳堤保存有大量大小混杂及两壳绞合的双壳类化石,是全球干旱区罕见的地貌景观,为青藏高原东北部中晚更新世的气候与环境演化提供了重要的区域地质记录。该记录在诺木洪西北约20 km出露,将其命名为诺木洪贝壳堤。目前诺木洪... 详细信息

柴达木盆地贝壳堤保存有大量大小混杂及两壳绞合的双壳类化石,是全球干旱区罕见的地貌景观,为青藏高原东北部中晚更新世的气候与环境演化提供了重要的区域地质记录。该记录在诺木洪西北约20 km出露,将其命名为诺木洪贝壳堤。目前诺木洪贝壳堤的沉积属性存在河湖之争,对该贝壳堤剖面开展系统的介形类分析,建立了8个生物组合带,除1带化石稀少无法鉴定外,2-8带自下而上依次为:Ilyocypris-Candona-Candoniella组合、Ilyocypris-Candona-Leucocythere-Candoniella-Eucypris inflata组合、Leucocythere-Ilyocypris组合、Ilyocypris-Leucocythere-Candoniella-Candona组合、Ilyocypris-Candoniella-Leucocythere组合、Ilyocypris bradyi-Ilyocypris echinata组合和Ilyocypris bradyi-Candoniella组合。根据8个生物组合带的属种特征和古生态指标综合分析贝壳堤水体的演化过程,认为诺木洪贝壳堤为河流相沉积。1-5带沉积期由于频繁的河流改道,贝壳堤剖面处经历牛轭湖-浅水河流多次转变,牛轭湖阶段水体较深不利于介形类生存,而浅水河流阶段介形类相对繁盛;6-8带沉积期水体维持极浅河流状态,介形类繁盛,后因持续干旱河道封闭,水体盐度升高而不利于介形类生存;最终盐壳析出,诺木洪贝壳堤沉积结束。

关键词：柴达木盆地诺木洪贝壳堤介形类河流沉积

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沙塘川河西宁段表层沉积物重金属与稀土元素地球化学特征及其物源解析

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贵州师范大学学报（自然科学版） 2023年第6期41卷 10-20页

作者：杨莎宋先腾徐双贵逯克思青海大学地质工程系青海西宁810016 中国地质调查局西宁自然资源综合调查中心青海西宁810000 中铁十九局集团矿业投资有限公司北京100000 青海大学水利水电学院青海西宁810016

选取青海省沙塘川河西宁段表层沉积物为研究对象,分析Cr等8种重金属的污染程度、潜在生态风险和物质来源以及稀土元素组成、分布特征和物质来源,并探讨稀土元素的控制因素。结果显示,重金属呈现轻度—中度污染状况,污染负荷程度为轻度,... 详细信息

选取青海省沙塘川河西宁段表层沉积物为研究对象,分析Cr等8种重金属的污染程度、潜在生态风险和物质来源以及稀土元素组成、分布特征和物质来源,并探讨稀土元素的控制因素。结果显示,重金属呈现轻度—中度污染状况,污染负荷程度为轻度,元素生态风险高低顺序依次为Cd>Hg>Co>Pb>Ni>Cu>Cr>Zn。稀土元素整体表现为轻稀土元素富集,重稀土元素相对亏损的特征,Eu呈中等负异常,无明显Ce异常。轻重稀土元素之间分异显著,轻稀土元素内部分异明显,重稀土元素内部分异不明显。沉积岩源岩及矿物组成对稀土元素的组成起到了控制作用,化学风化对其影响较小。Co、Ni、Cu、Zn主要受矿物自然风化等自然源的影响,Cr、Pb、Cd、Hg主要受工业、农业等人为源的影响;稀土元素主要来源于自身水土侵蚀。

关键词：沙塘川河西宁段表层沉积物重金属稀土元素地球化学特征物质来源

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青海省锡铁山矿区外围异常成矿潜力分析

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物探与化探 2014年第4期38卷 673-679页

作者：韩朝辉王雁鹤裴赢政宋先腾武警黄金第六支队河南三门峡472000 中国地质大学地球科学与资源学院北京100083 武警黄金第三支队黑龙江哈尔滨150000

锡铁山铅锌矿是中国目前铅锌储量最大的矿床。但是由于该区外围地势险要,地形复杂,国内对其外围成矿潜力的研究并不是很多。本次对该矿床外围进行了740 km2面积的1∶5万水系沉积物测量及2 053 km2面积的1∶5万高精度磁法测量,最终圈定... 详细信息

锡铁山铅锌矿是中国目前铅锌储量最大的矿床。但是由于该区外围地势险要,地形复杂,国内对其外围成矿潜力的研究并不是很多。本次对该矿床外围进行了740 km2面积的1∶5万水系沉积物测量及2 053 km2面积的1∶5万高精度磁法测量,最终圈定化探异常18处,物探异常28处。通过后期异常查证工作,笔者对这些异常区的成矿潜力做了具体分析,从中优选出了小柴旦湖南、柳园沟、向南沟、锡铁山站南4处成矿有利靶区。

关键词：地球化学小柴旦湖成矿潜力高精度磁法水系沉积物

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Preparation and characterization of methacrylated gelatin/bacterial cellulose composite hydrogels for cartilage tissue engineering

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Regenerative Biomaterials 2020年第2期7卷 195-202页

作者： Liling Gu Tao Li Xiongbo song xianteng Yang Senlei Li Long Chen Pingju Liu Xiaoyuan Gong Cheng Chen Li Sun Medical College Guizhou UniversityGuiyang 550025China Department of Rehabilitation Guizhou Provincial People’s HospitalGuiyang 550002China Center for Joint Surgery Southwest HospitalThird Military Medical University(Army Medical University)Chongqing 400038China Department of Orthopedics Guizhou Provincial People’s HospitalGuiyang 550002China Zunyi Traditional Chinese Medicine Hospital Zunyi 563099China

Methacrylated gelatin(GelMA)/bacterial cellulose(BC)composite hydrogels have been successfully prepared by immersing BC particles in GelMA solution followed by *** morphology of GelMA/BC hydrogel was examined by scanning electron microscopy and compared with pure *** hydrogels had very well interconnected porous network structure,and the pore size decreased from 200 to 10 mm with the increase of BC *** composite hydrogels were also characterized by swelling experiment,X-ray diffraction,thermogravimetric analysis,rheology experiment and compressive *** composite hydrogels showed significantly improved mechanical properties compared with pure *** addition,the biocompatility of composite hydrogels were preliminarily evaluated using human articular *** cells encapsulated within the composite hydrogels for 7 days proliferated and maintained the chondrocytic ***,the GelMA/BC composite hydrogels might be useful for cartilage tissue engineering.

关键词： methacrylated gelatin bacterial cellulose hydrogel cartilage tissue engineering

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