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Analysis of the Spatio-Temporal Characteristics of Winter Surface Urban Heat Island:A Case Study in beijing,China

Journal of Earth Science 2024年第5期35卷 1640-1653页

作者： Shanshan Lu Fujiang liu Yunshuang Ye Jiayu Tang Peng Li Weihua Lin Yan Guo Ruqiang Ma Jun wang School of Geography and Information engineering China University of GeosciencesWuhan 430074China AutoNavi Software Co. Ltd.Beijing 100102China School of Computer Science China University of GeosciencesWuhan 430078China Yantai geological Survey of Coastal Resources Center Yantai 264000China

This study reveals the temporal and spatial evolution characteristics of the winter nighttime urban heat island(UHI)effect in the case of beijing,*** land surface temperature(LST)is retrieved by radiative transfer equation by using the remote sensing data from Landsat ETM+/OLI_TIRS from 2007 to 2017 for the winter nighttime period,and LST is then divided by the mean-standard deviation method into different levels of thermal landscapes.A combination of the migration calculation of gravity center and multi-directional profile analysis is used to study the directional differentiation characteristics of LST and the migratory characteristics of the gravity center of ***,the overall temporal and spatial evolution characteristics of winter nighttime surface urban heat island(SUHI)in beijing are studied,and the possible reasons for the changes are *** show that beijing's UHI effect first increased and subsequently decreased from 2007 to *** winter heat island in the urban area developed from low-density agglomeration to high-density agglomeration to lowdensity ***,the high-level thermal landscapes migrated to the southwest along with the city center of gravity,and the expansion rate is fastest in the southwest,which is directly linked to the changes in the urban construction ***,the overall spatial distribution of winter nighttime LST is high in the east and south and low in the west and north,and is influenced by topography,land cover,urbanization,anthropogenic heat,and other factors as well.

关键词： land surface temperature urban heat island spatio-temporal characteristics winter environmentgeology

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Late Cambrian Magmatic Events in SW Yunnan and Implications for the Tectonic Reconstruction of Northern Gondwana

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Journal of Earth Science 2024年第5期35卷 1407-1425页

作者： Guichun liu Jianwei Zi Xiaomei Nie M.Santosh Cai Zhu Wei wang Tianyu Zhao Guangyan Chen Qinglai Feng Yunnan institute of geological sciences Kunming 650216China School of Earth sciences China University of GeosciencesWuhan 430074China State Key Lab of geological Processes and Mineral Resources China University of GeosciencesWuhan 430074China John de Laeter Centre State Key Curtin UniversityBentley 6102Australia School of Earth sciences and Resources China University of GeosciencesBeijing 100083China Department of Earth Science University of AdelaideAdelaide SA5005Australia Yunnan Geotechnical engineering Survey and Design institute Kunming 650214China Yunnan Exploration institute of geology and Mineral Resources Kunming 650051China

In this study,we investigated Early Paleozoic magmatic rocks of the Manlai Formation exposed along the eastern margin of the Lancang terrane to better understand the tectonic history of the *** present petrological,geochemical and whole-rock Sr-Nd and zircon Hf isotopic data for basalts and gabbros sampled from the Qianmai mé*** grains from six basaltic and gabbroic samples yielded U-Pb ages of 495-482 *** rocks are characterized by tholeiitic and Nbenriched compositions,with Nb/La ratios in the range of 0.38-1.38,similar to the typical Nb-enriched *** the mafic rocks show slightly negative to positiveε_(Nd)(t)(-1.67 to+4.32)and zirconε_(Hf)(t)values(-7.3 to+3.8).Elemental and isotopic data suggest that the Qianmai Nb-enriched mafic rocks were mainly derived from the mixing of an OIB-like source with a subduction-modified mantle wedge *** with magmatic and sedimentary records of similar ages in the Lancang terrane and the Baoshan Block,our results reveal Early Paleozoic magmatic and sedimentary sequences along an active margin of the *** into account the recently identified Early Paleozoic ophiolitic mélange in the Yunxian-Menghai belt,we consider the Qianmai magmatic rocks to represent the products of early-stage subduction-related magmatism within a primitive island arc or fore-arc setting associated with the southward subduction of the *** infer that prolonged south-dipping subduction on the northern margin of Gondwana persisted from the Cambrian to the Late Ordovician.

关键词： Qianmai melange Nb-enriched basalts island arc Proto-Tethys northern margin of Gondwana SW Yunnan tectonics geochemistry

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geological conditions and reservoir characteristics of various shales in major shalehosted regions of China

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China geology 2024年第1期7卷 138-149页

作者： Shu-jing Bao Tian-xu Guo Jin-tao Yin Wei-bin liu Sheng-jian wang Hao-han Li Zhi Zhou Shi-zhen Li Xiang-lin Chen The Key Laboratory of Unconventional Petroleum geology China Geological SurveyMinistry of Natural Resources100083 BeijingChina Oil and Gas Survey China Geological Survey100083 BeijingChina Research institute of Yanchang Petroleum(Group)CO.LTD 710076 Xi’anChina

China is home to shales of three facies:Marine shale,continental shale,and marine-continental transitional *** types of shale gas are associated with significantly different formation conditions and major controlling *** study compared the geological characteristics of various shales and analyzed the influences of different parameters on the formation and accumulation of shale *** general,shales in China’s several regions exhibit high total organic carbon(TOC)contents,which lays a sound material basis for shale gas *** strata generally show high degrees of thermal *** contrast,continental shales manifest low degrees of thermal evolution,necessitating focusing on areas with relatively high degrees of thermal evolution in the process of shale gas surveys for these *** shales of the Wufeng and silurian formations constitute the most favorable shale gas reservoirs since they exhibit the highest porosity among the three types of *** shales are followed by those in the Niutitang and Longtan *** contrast,the shales of the Doushantuo,Yanchang,and Qingshankou formations manifest low ***,the shales of the Wufeng and Longmaxi formations exhibit high brittle mineral *** a low siliceous mineral content,the shales of the Doushantuo Formation feature a high carbonate mineral content,which can increase the shales’brittleness to some *** marine-continental transitional shales,where thin interbeds of tight sandstone with unequal thicknesses are generally found,it is recommended that fracturing combined with drainage of multiple sets of lithologic strata should be employed to enhance their shale gas production.

关键词： Shale gas Marine shale Continental shale Marine-continental transitional shale Neoproterozoic-Cretaceous strata geological conditions Reservoir characteristics Petroleum geological survey engineering

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基于可解释机器学习的青藏高原草地物候变化多因素影响分析

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环境科学 2024年第6期45卷 3375-3388页

作者：刘慧文刘欢胡鹏彭辉王硕中国海洋大学环境科学与工程学院青岛266100 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室北京100038 中国海洋大学海洋环境与生态教育部重点实验室青岛266100 中国海洋大学海洋环境地质工程山东省重点实验室青岛266100

气候变化背景下,青藏高原植被物候发生显著改变.然而,影响物候的水热因素众多,目前较少有研究关注多因素对青藏高原物候的影响效应,导致对青藏高原物候变化机制认识不足.为此,研究通过遥感数据解译,在对2002~2021年青藏高原草地物候时... 详细信息

气候变化背景下,青藏高原植被物候发生显著改变.然而,影响物候的水热因素众多,目前较少有研究关注多因素对青藏高原物候的影响效应,导致对青藏高原物候变化机制认识不足.为此,研究通过遥感数据解译,在对2002~2021年青藏高原草地物候时空变化特征分析的基础上,聚焦降水、气温、海拔和土壤等多方面,利用可解释机器学习方法(SHAP)揭示物候变化的主导因素,并量化分析多因素对物候的交互影响.结果表明:①青藏高原分别有56.32%、67.65%和65.50%的草地表现出生长季开始时间(SOS)提前、生长季结束时间(EOS)延迟和生长季长度(LOS)延长趋势;②青藏高原草地SOS和LOS主要受水分条件影响,3月0~10 cm土壤水分对SOS提前和LOS延长起促进作用的范围分别在10~25 kg·m^(-2)和15~25 kg·m^(-2)之间,峰值分别在20 kg·m^(-2)和18 kg·m^(-2)左右;EOS则主要受温度影响,9月和10月温度越高对EOS延迟促进作用越强,并分别在高于8℃和-0.5℃时达到峰值;③水热等因素对物候的影响存在非线性交互效应,3月0~10 cm土壤水分达到20 kg·m^(-2)后,更有利于低降水和低海拔地区SOS提前;10月温度高于0℃后较好的水分条件更有利于EOS延迟;3月0~10 cm土壤水分在12~22 kg·m^(-2)之间时,高降水地区LOS更长.研究表明,可解释机器学习方法可为物候变化的多因素影响定量分析提供一种新的方法.

关键词：青藏高原草地物候时空变化极限梯度提升(XGBoost) SHAP 交互影响

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Paleomagnetism of Miocene sediments from the Turfan Basin,Northwest China:no significant vertical-axis rotation during Neotectonic compression within the Tian Shan Range,Central Asia

Paleomagnetism of Miocene sediments from the Turfan Basin,No...

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中国科学院地质与地球物理研究所2004学术年会

作者： B.C.Huang~(a,*),Y.C.wang~a,T.liu~a,T.S.Yang~b,Y.A.Li~c,D.J.Sun~c,R.X.Zhu~a a institute of geology and Geophysics,chinese academy of sciences,P.O.Box 9825,beijing 100029,China b institute of Geomechanics,chinese academy of geological sciences,beijing 100081,China c institute of geology and Mineral Resources,Bureau of geology and Mineral Resources of Xinjiang Uygur Autonomous Region Urumqi 830000,China

Paleomagnetic results are reported from 377 samples of Miocene red sediments in the Turfan Basin of East Tian Shah, Northwest *** demagnetization for most specimens isolates a low-temperature component that groups around the present geomagnetic field.A high-temperature characteristic component is isolated from four localities and interpreted as primary remanent magnetization from apparent pre-folding origin and positive reversal *** for previous results obtained from Tertiary rocks in central Asia,the magnetic inclination is significantly shallower than the reference field computed from the Eurasian APW path at 10 and 20 *** susceptibility measured in 324 specimens exhibits low anisotropy of less than 1.05 for>80%of the *** low anisotropy degrees,AMS shape and orientations suggest that the studied rocks are unlikely to have undergone significant strain during compaction or *** argue that the shallow inclination is likely to result from an initially shallow detrital remanent *** of the paleomagnetic declination from Eurasia, North China,and Tarim suggests that the Turfan Basin has been subjected to little or no vertical-axis rotation since the Miocene. Together with paleomagnetic declinations on both sides of the Talas-Ferghana fault,we propose that the Tian Shan to the east of the Talas-Ferghana fault has remained relatively stationary with respect to adjacent blocks since the Miocene.

关键词： Turfan Basin Tian Shan Miocene Paleomagnetism Inclination shallowing Vertical-axis rotation

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Prediction of Hidden Ore Bodies using Integrated geology,Source of Fluids and Stratagem EH4 Geophysical Survey in Kuoerzhenkuola Gold Deposit in Xinjiang,China

Prediction of Hidden Ore Bodies using Integrated Geology,Sou...

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中国科学院地质与地球物理研究所2008学术年会

作者： Ping SHen,Yuanchao SHen,Tiebing liu,Heping ZHU,Lijuan wang, Qingdong ZenG and Guangming LI Key Laboratory of Mineral Resources,institute of geology and Geophysics,chinese academy of sciences,beijing,China

The Kuoerzhenkuola gold deposit is located in the Sawur gold belt in Xinjiang,*** integrated geological, geochemical and geophysical investigation was carried out in the Kuoerzhenkuola gold deposit,to determine the extension of the principal mineralized system,in the search for new ***-examination of the rocks and structures in the Kuoerzhenkuola area showed that the study area features an elliptical caldera where the gold deposit lies.A re-investigation of the mine geology found that the mineralization at the Kuoerzhenkuola gold deposit is not controlled by the EW-striking regional fault as previously assumed,but by a caldera fracture system locally superimposed by regional faults;the host rocks are andesites and dacites of the Carboniferous Heishantou Group rather than the crypto-explosive breccia of the Devonian Sawurshan *** components of fluid inclusions from quartz,trace element chemistry of pyrite and fluid inclusions in pyrite,Pb isotopes of pyrite,and whole-rock geochemistry and Pb isotopes of the country rocks are used to study the source of fluids at Kuoerzhenkuola gold *** ore-forming fluids are characterized by low-moderate temperatures and low salinities estimated from fluid inclusion *** mass spectrometry indicated a CO-bearing *** coupled plasma-mass spectrometry of the fluid inclusions indicated high Cu (average 70 ppm) for the Au mineralization,whereas the host rocks have low Cu(average 33 ppm),indicating that Cu of the ore-forming fluids originated from magmatic fluid rather than the volcanic *** isotopes of ores and host volcanic rocks indicate a similar,mixed source and some Pb could be sourced from the *** implied that magmatic fluids could play an important role in the Au mineralization *** new geological findings and the fluids derived mainly from the magmatic fluids suggest that the ore-forming fluids originate at depth,and are transported and precipi

关键词： gold mineralization prediction of hidden ore bodies source of fluids Stratagem EH4 Xinjiang.

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A super-large landslide in Tibet in 2000:background,occurrence,disaster,and origin

A super-large landslide in Tibet in 2000:background,occurren...

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中国科学院地质与地球物理研究所2003学术年会

作者： Yanjun Shang~(a,*),Zhifa Yang~a,Lihui Li~a,Da’an liu~a,Qiulin Liao~a,Yangchun wang~b a Key Laboratory of engineering Geomechanics.institute of geology and Geophysics,chinese academy of sciences.beijing 10029,China b institute of Mountain Hazards and environment.chinese academy of sciences and Water Conservancy Ministry,Chengdu 610041,China

On April 9.2000.a super-large landslide(3×10 m) occurred along Zhamu Creek,southeast *** a result,a landslide dam formed and the Yigong River was blocked.A channelized diversion was constructed for prevention of *** months later on June 10,a catastrophic flood resulting from the failure of the landslide dam caused a serious loss of property. This is the second of landslide occasion dam formation and flooding occurrence at the same site since 1900. In this paper we introduce the background and occurrence of the landslide,report the dam failure and overflow process,and finally discuss the origin of the landslide and of the flood in comparison with statistical characteristics of previous case histories *** large and small landslides will continue to occur because of the distinctive physiographic,geological and climatic conditions in this *** we can do is perhaps only to predict and avoid *** predicted global warming, water availability has become more and more important for landslide occurrence.

关键词： Tibet Yigong Landslide Landslide dam Channelized diversion Flood

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Inclination Deepening of Paleogene Red Beds in the Qiangtang Terrane,the Hinterland of the Qinghai-Tibet Plateau

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地学前缘 2009年第S1期16卷 94-95页

作者： Bo Ran,Zhifei liu,Chengshan wang,Xixi Zhao,Yalin Li 1.College of Earth sciences,Chengdu University of Technology,Chengdu 610059,China. 2.Laboratory of Marine geology,Tongji University,Shanghai 200092,China 3.State Key Laboratory of geological Processes and Mineral Resources,Research Center for Tibetan Plateau geology,China University of Geosciences,beijing 100083,China 4.institute of Tectonics and Earth sciences Department,University of California,Santa Cruz,CA 95064,USA

In this research,one hundred and ten samples（ten sampling localities）were drilled by a portable petrol-driven drill in the Tongtianhe area along the highway where developes Yaxicuo Group,Oligocene. Complete demagnetization were finished in University of California,Santa Cruz（UCSC）.These remanence data were collected:Dg=334.2,Ig=52.3,α95=7.1,k=7.3（before structural correction）;Ds=27.2, Is=66.6,α95=7.3,k=7.0（after structural correction）.

关键词： inclination deepening red beds Yaxicuo Group remagnetization

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Relationships Between the North China Plate and the Tarim Plate

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Acta Geologica sinica(english Edition) 1994年第2期68卷 109-124,226页

作者： wang Tingyin, wang Jinrong, liu Jinkun, D epartment of geology, Lanzhou U niversity, Lanzhou, Gansuwang Shizheng, Ningxia Bureau of geology and Mineral Resources, Yinchuan, Ningxiaand Wu Jiahong Shenyang institute of geology and Mineral Resources, Shenyang, Liaoning Department of geology Lanzhou University Lanzhou Gansu China

The relationships and boundary between the North China and Tarim plates have been unclear for a long time ; however, the two plates occupy a prominent position in the formation and evolution of the continental lithosphere of China. It is proposed that the engger Us ophiolitic melange zone discovered recently north of Alaxa is a typical suture between the two plates. The ophiolitic melange zone is composed mainly of a mixture of fragments of ancient oceanic crust and sedimentary rocks of active and passive continental margins. The melange may be divided into tectonic inclusions and matrix. The suture extends northeastwards into the Republic of Mongolia and probably westwards to meet the Altun fault. With the engger Us ophiolitic melange zone as the boundary the Alaxa area may be divided into two parts: the northern part (AN ) belongs to the Tarim plate, while the southern part (AS) the North China plate. geological evidence shows that the two plates were amalgamated in the Late Permian or a bit later.

关键词： North China plate Tarim plate ophiolitic melange tectonic evolution

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西昆仑克里雅地区晚三叠世S型花岗岩地球化学、锆石U-Pb年代学、Hf-Nd同位素特征及其地质意义

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岩石学报 2024年第8期40卷 2415-2428页

作者：王振宏王核白洪阳黄亮王堃宇刘金恒中国科学院广州地球化学研究所矿物学与成矿学重点实验室广州510640 中国科学院大学北京100049

锂是当今中国重要的战略金属资源。近年来,在西昆仑稀有金属成矿带中陆续发现卡拉瓦拉、牧林场、康西瓦、白龙山、雪凤岭等中大型高品位伟晶岩型锂矿。为了在具有锂铍化探异常圈定区域寻找新的稀有金属矿床,本次研究以西昆仑造山带东缘... 详细信息

锂是当今中国重要的战略金属资源。近年来,在西昆仑稀有金属成矿带中陆续发现卡拉瓦拉、牧林场、康西瓦、白龙山、雪凤岭等中大型高品位伟晶岩型锂矿。为了在具有锂铍化探异常圈定区域寻找新的稀有金属矿床,本次研究以西昆仑造山带东缘大红柳滩稀有金属矿集区的白龙山矿床为模型,建立“晚三叠世S型花岗岩-伟晶岩+巴颜喀拉群地层+韧性剪切带的薄弱地段就位+锂铍化探异常”的组合找矿模型。为了探究位于大红柳滩东缘的克里雅地区是否具有发现稀有金属矿床的潜力,本文以这套组合找矿模型为指导思想,结合地球化学、锆石U-Pb年代学及Hf-Nd同位素等方法对克里雅花岗岩体的研究成果,同时通过区域地层及其构造背景与白龙山矿床的对比分析,结果表明:克里雅岩体属于S型二长花岗岩,平均年龄为207±1.1Ma,与白龙山矿床母岩S型二云母花岗岩在误差范围内一致;此外,尽管克里雅区域锂铍化探异常较高,出露地层相同,且出露伟晶岩,构造形成环境同为后碰撞,但两者岩浆源区不一致。基于以上研究,本文认为克里雅地区不适合运用以白龙山伟晶岩型锂矿床为模型的找矿理论指导。

关键词：克里雅二长花岗岩锆石U-Pb定年 Hf-Nd同位素稀有金属西昆仑

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