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Spectral matching techniques (SMTs) and automated cropland classification algorithms (ACCAs) for mapping croplands of australia using MODIS 250-m time-series (2000–2015) data

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International Journal of Digital Earth 2017年第9期10卷 944-977页

作者： Pardhasaradhi Teluguntla Prasad S.Thenkabail Jun Xiong Murali Krishna Gumma Russell G.Congalton Adam Oliphant Justin Poehnelt Kamini Yadav Mahesh Rao Richard Massey U.S.geological survey(USGS) Western Geographic Science CenterFlagstaffAZUSA Bay Area Environmental Research Institute(BAERI) PetalumaCAUSA International Crops Research Institute for the Semi-Arid Tropics(ICRISAT) PatancheruHyderabadIndia Department of Natural Resources and the Environment University of New HampshireDurhamNHUSA Department of Forestry and Wildland Resources Humboldt State UniversityArcataCAUSA School of Earth Science and Environmental Sustainability Northern Arizona UniversityFlagstaffAZUSA

Mapping croplands,including fallow areas,are an important measure to determine the quantity of food that is produced,where they are produced,and when they are produced(***).Furthermore,croplands are known as water guzzlers by consuming anywhere between 70%and 90%of all human water use *** these facts and the increase in global population to nearly 10 billion by the year 2050,the need for routine,rapid,and automated cropland mapping year-after-year and/or season-after-season is of great *** overarching goal of this study was to generate standard and routine cropland products,year-after-year,over very large areas through the use of two novel methods:(a)quantitative spectral matching techniques(QSMTs)applied at continental level and(b)rule-based Automated Cropland Classification Algorithm(ACCA)with the ability to hind-cast,now-cast,and *** was chosen for the study given its extensive croplands,rich history of agriculture,and yet nonexistent routine yearly generated cropland products using multi-temporal remote *** research produced three distinct cropland products using Moderate Resolution Imaging Spectroradiometer(MODIS)250-m normalized difference vegetation index 16-day composite time-series data for 16 years:2000 through *** products consisted of:(1)cropland extent/areas versus cropland fallow areas,(2)irrigated versus rainfed croplands,and(3)cropping intensities:single,double,and continuous *** accurate reference cropland product(RCP)for the year 2014(RCP2014)produced using QSMT was used as a knowledge base to train and develop the ACCA algorithm that was then applied to the MODIS time-series data for the years 2000–2015.A comparison between the ACCA-derived cropland products(ACPs)for the year 2014(ACP2014)versus RCP2014 provided an overall agreement of 89.4%(kappa=0.814)with six classes:(a)producer’s accuracies varying between 72%and 90%and(b)user’s accuracies varying between 79%and 90%.ACPs

关键词： Croplands food security automated cropland classification algorithms machine learning algorithms quantitative spectral matching techniques australia

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Late Eocene–early Miocene provenance evolution of the Crocker Fan in the southern South China Sea

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Acta Oceanologica Sinica 2023年第3期42卷 215-226页

作者： Yuchi Cui Lei Shao Wu Tang Peijun Qiao Goh Thian Lai Yongjian Yao State Key Laboratory of Marine Geology Tongji UniversityShanghai 200092China Earth Dynamics Research Group The Institute for Geoscience Research(TIGeR)School of Earth and Planetary SciencesCurtin UniversityGPO Box U1987Australia China National Offshore Oil Corporation(CNOOC)Research Institute Co. Ltd.Beijing 100028China Department of Earth Sciences and Environment Faculty of Science and TechnologyUniversity Kebangsaan MalaysiaBangi 43600SelangorMalaysia Guangzhou Marine geological survey Ministry of Natural ResourcesGuangzhou 510075China

There are many large-scale Cenozoic sedimentary basins with plentiful river deltas,deep-water fans and carbonate platforms in the southern South China *** Crocker Fan was deposited as a typical submarine fan during the late Eocene–early Miocene,and stretches extensively across the entire Sarawak–Sabah of the northern Borneo ***,systematic analyses are still lacking regarding its sediment composition and potential source *** consensus has been reached yet on the provenance evolution and sedimentary infilling processes,which seriously impeded the oil-and-gas exploration *** combining with sedimentaryfacies identification,heavy mineral assemblages,elemental geochemistry and detrital zircon U-Pb dating,this paper aims to generalize an integrated analysis on the potential provenance terranes and restore source-to-sink pathways of the Crocker *** general,the Crocker Fan was initially formed over the Cretaceous–lower/middle Eocene Rajang Group by an angular Rajang *** continual southward subduction of the protoSouth China Sea resulted in magmatic activities and subsequent regional deformation and thrusting along the Lupar Line in the northern *** lowermost Crocker sequence is featured by a thick conglomerate layer sourced from in-situ or adjacent *** the late Eocene to the early Miocene,the Crocker Fan was constantly delivered with voluminous detritus from the Malay Peninsula of the western *** Zengmu Basin was widely deposited with delta plain and neritic facies sediments,while the Brunei-Sabah Basin,to the farther east,was ubiquitously characterized by turbiditic *** Crocker Fan successions are overall thick layers of modest-grained sandstones,which formed high-quality reservoirs in the southern South China Sea region.

关键词： source-to-sink analysis zircon U-Pb age submarine fan Malay Peninsula southern South China Sea

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New interpretation on the provenance changes of the upper Pinghu–lower Huagang Formation within Xihu Depression,East China Sea Shelf Basin

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Acta Oceanologica Sinica 2023年第3期42卷 89-100页

作者： Jinshui Liu Shuai Li Kaifei Liao Yuchi Cui Lei Shao Peijun Qiao Yi Lu Yuanli Hou Thian Lai Goh Yongjian Yao Shanghai Branch of China National Offshore Oil Corporation(CNOOC)Co. Ltd.Shanghai 200030China State Key Laboratory of Marine Geology Tongji UniversityShanghai 200092China Earth Dynamics Research Group The Institute for Geoscience Research(TIGeR)School of Earth and Planetary SciencesCurtin UniversityGPO Box U1987Australia Department of Earth Sciences and Environment Faculty of Science and TechnologyUniversity Kebangsaan Malaysia43600 BangiSelangorMalaysia Guangzhou Marine geological survey Ministry of Natural ResourcesGuangzhou 510075China

Both Pinghu and Huagang formations are important hydrocarbon reservoirs of the Xihu Depression in the East China Sea Shelf *** the source suppliers and restoring source-to-sink transport routes are of great significance to the future petroleum and gas *** researchers were largely confined by either limitation of geological records,highly dependence on a singular method or low-precision dating *** study integrated heavy mineral assemblages,geochemical analyses and detrital zircon U-Pb dating to reconstruct multiple source-to-sink pathways,and to provide a better understanding on the provenance evolution for the upper Pinghu–lower Huagang depositions of the Xihu *** least three major provenances have been confirmed and systematically investigated for their separate compositional *** Hupijiao Uplift(or even farther northern area)was dominated by a major Paleoproterozoic population peaked at ca.1830 Ma along with minor Mesozoic *** Haijiao Uplift to the west and the Yushan Low Uplift to the southwest,on the other hand,generate opposite U-Pb age spectra with apparently larger peaks of Indosinian and Yanshanian-aged *** be noted,both Indosinian and Paleoproterozoic peaks are almost identical in proportion for the Haijiao *** overall sedimentary pattern of late Eocene-early Oligocene was featured by both spatial and temporal *** Hupijiao Uplift was likely to cast limited impact during the late Eocene,whereas the broad southern Xihu Depression was transported by a large abundance of materials from the nearby Haijiao and Yushan Low *** northern source substantially extended its influence to the farther south during the early Oligocene by delivering plentiful sediments of higher-degree metamorphic parent *** with the proximal western and southwestern suppliers,the overall Xihu Depression was under control from both distant and local provenances.

关键词： Xihu Depression East China Sea Shelf Basin detrital zircon U-Pb ages Pinghu–Huagang Formation provenance

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Displacement characteristics and prediction of Baishuihe landslide in the Three Gorges Reservoir

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Journal of Mountain Science 2019年第9期16卷 2203-2214页

作者： LI De-ying SUN Yi-qing YIN Kun-long MIAO Fa-sheng Thomas GLADE Chin LEO Faculty of Engineering China University of Geosciences Wuhan 430074 China Department of Geography and Regional Research University of Vienna Vienna 1010 Austria School of Computing Engineering and Math Western Sydney University Sydney NSW 1797 Australia

In order to reach the designated final water level of 175 m, there were three impoundment stages in the Three Gorges Reservoir, with water levels of 135 m, 156 m and 175 m. Baishuihe landslide in the Reservoir was chosen to analyze its displacement characteristics and displacement variability at the different stages. Based on monitoring data, the landslide displacement was mainly influenced by rainfall and drawdown of the reservoir water level. However, the magnitude of the rise and drawdown of the water level after the reservoir water level reached 175 m did not accelerate landslide displacement. The prediction of landslide displacement for active landslides is very important for landslide risk management. The time series of cumulative displacement was divided into a trend term and a periodic term using the Hodrick-Prescott(HP) filter method. The polynomial model was used to predict the trend term. The extreme learning machine(ELM) and least squares support vector machine(LS-SVM) were chosen to predict theperiodic term. In the prediction model for the periodic term, input variables based on the effects of rainfall and reservoir water level in landslide displacement were selected using grey relational analysis. Based on the results, the prediction precision of ELM is better than that of LS-SVM for predicting landslide displacement. The method for predicting landslide displacement could be applied by relevant authorities in making landslide emergency plans in the future.

关键词： Landslide Three Gorges Reservoir Impoundment process Displacement prediction

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^40Ar/^39Ar and Rb-Sr Ages of the Tiegelongnan Porphyry Cu-(Au)Deposit in the Bangong Co-Nujiang Metallogenic Belt of Tibet,China:Implication for Generation of Super-Large Deposit

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Acta Geologica Sinica(English Edition) 2017年第2期91卷 602-616页

作者： LIN Bin CHEN Yuchuan TANG Juxing WANG Qin SONG Yang YANG Chao WANG Wenlei HE Wen ZHANG Lejun MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China Centre of Excellence in Ore Deposit(CODES) University of TasmaniaHobart7001Australia Chengdu University of Technology Chengdu 610059China Departement de geologie et de genie geologique Universite LavalQuebecQC G1VOA6Canada Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China China University of Geosciences Beijing 100083China

The Tiegelongnan deposit is a newly discovered super-large porphyry-epithermal Cu-（Au） deposit in the western part of the Bangong Co-Nujiang metallogenic belt, Tibet（China）. Field geology and geochronology indicate that the porphyry mineralization was closely related to the Early Cretaceous intermediate-felsic intrusions（ca. 123–120 Ma）. Various epithermal ore and gangue mineral types were discovered in the middle-shallow part of the orebody, indicating the presence of epithermal mineralization at Tiegelongnan. Potassic, propylitic, phyllic and advanced argillic alteration zones were identified. 40Ar/39Ar dating of hydrothermal biotite（potassic zone）, sericite（phyllic zone）, and alunite（advanced argillic zone） in/around the ore-bearing granodiorite porphyry yielded 121.1±0.6 Ma（1σ）, 120.8±0.7 Ma（1σ） and 117.9±1.6 Ma（1σ）, respectively. Five hydrothermal mineralization stages were identified, of which the Stage IV pyrite was Rb-Sr dated to be 117.5±1.8 Ma（2σ）, representing the end of epithermal mineralization. Field geology and geochronology suggest that both the epithermal and porphyry mineralization belong to the same magmatic-hydrothermal system. The Tiegelongnan super-large Cu-（Au） deposit may have undergone a prolonged magmatichydrothermal evolution, with the major mineralization event occurring at ca.120–117Ma.

关键词： 40Ar/39Ar and Rb-Sr dating Tiegelongnan Cu-(Au) deposit Bangong Co-Nujiang metallogenic belt Tibet Proto-Tethys

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青藏高原东西向地质构造差异及其成因探讨

青藏高原东西向地质构造差异及其成因探讨

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作者：肖龙王春增 Franco Pirajno 中国地质大学(武汉)地球科学学院 University of Maine at Presque Isle geological survey of western australia

新的地质观察和对地质、地球物理和地震层析资料的分析发现,青藏高原东部和西部存在系统的从地形地貌到壳幔结构的差异,主要表现为西部地形高、湖泊分布广泛、剥蚀程度小、地震多且震源深度大、火山活动早且多为钾质和超钾质;东部地形... 详细信息

新的地质观察和对地质、地球物理和地震层析资料的分析发现,青藏高原东部和西部存在系统的从地形地貌到壳幔结构的差异,主要表现为西部地形高、湖泊分布广泛、剥蚀程度小、地震多且震源深度大、火山活动早且多为钾质和超钾质;东部地形低、植被相对发育、湖泊少而发育大的水系、剥蚀程度较强、地震震源深度浅、火山岩较年轻且多为钙碱性:西部地壳以厚皮变形机制为主,表现为南北向的逆冲推覆与中新世以来的东西向伸展,而东部则表现为强烈的地壳缩短与薄皮变形,表现为大规模的褶皱与走滑。青藏高原东部和西部以新发现的亚东—安多—格尔木构造带为界,该构造带由一系列左行剪切断层、裂谷和拆离断层组成,带内地震震源深度小, 重要的是在地震层析模式中该带下部未见明显的俯冲板片,而东西部均存在整体且相对均一的高速异常。我们认为造成东西差异的深部原因可能是由于印度板块在向亚洲板块俯冲消减时在亚东—安多—格尔木构造带之下存在板片撕裂,撕裂开的东、西部板片以不同的角度和方向俯冲于青藏块体之下,因而导致上述不同的地壳变形机制、岩浆作用、东西块体的差异隆升与不同的地形地貌发展演化历史。

关键词：青藏高原印度板块板片撕裂差异隆升和剥蚀亚东-格尔木构造带

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超大型金成矿省的地球动力学背景(摘要)

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中国科学（D辑） 2000年第B12期30卷 176-176页

作者： R. Kerrich R. Goldfarb D. Groves S.Garwin Y. Jia 张静 Department of geological Sciences University of Saskatchewan United States geological survey Centre for Strategic Mineral Resources Department of Geology and Geophysics University of Western Australia Newmont Mining Corporation 1700 Lincoln street DenverCO 80203USA

按照数百吨到上千吨金产量成矿省的特征, 将金矿床分为6类: (ⅰ) 造山带型金矿, (ⅱ) 卡林和类卡林型金矿, (ⅲ) 浅成低温型热液金-银矿床, (ⅳ) 斑岩型铜-金矿床, (ⅴ) 铁氧化物型铜-金矿床; (ⅵ) 富金块状硫化物 (VMS) 矿床和沉积喷... 详细信息

按照数百吨到上千吨金产量成矿省的特征, 将金矿床分为6类: (ⅰ) 造山带型金矿, (ⅱ) 卡林和类卡林型金矿, (ⅲ) 浅成低温型热液金-银矿床, (ⅳ) 斑岩型铜-金矿床, (ⅴ) 铁氧化物型铜-金矿床; (ⅵ) 富金块状硫化物 (VMS) 矿床和沉积喷流矿床(SEDEX).

关键词：超大型金成矿省金矿床地球动力学

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The Origin of Tar AI-Say＇ed and Tar AI-Najaf, Karbala-Najaf Vicinity, Central Iraq

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Journal of Civil Engineering and Architecture 2015年第4期9卷 446-459页

作者： Varoujan K. Sissakian Mawahib F. Abdul Jab'bar Nadhir A. Al-Ansari Sven Knutsson Private consultant geologist Erbil 14006 Iraq State Company of geological survey and Mining Baghdad 14001 lraq Department of Civil Environmental and Natural Resources Engineering Lulea University of Technology Lulea 97187 Sweden

In central part of Iraq within the vicinity of Karbala-Najaf, two cliffs called ＂Tar Al-Say＇ed＂ and ＂Tar Al-Najaf＂ form conspicuous geomorphological forms between the Mesopotamia plain and the western and Southern Deserts. The top surface between the two cliffs （tars） is covered by alluvial fan sediments, laid down by A1-Khir Valley when merging in a large depression due to the drop in the gradient of the valley. Consequently, the depression was divided into two parts, to the left is called Al-Razzazah Depression, whereas to the right is called Bahir Al-Najaf. This affected the course of the River Euphrates. The deposition stopped due to an uplift movement which caused the elevation of the two cliffs which are covered by alluvial fan sediments. The two cliffs had and are still suffering from retreating, due to lateral erosion by wave actions in Al-Razzazah Depression. Springs located along a straight line, sag pond, deflected drainage, shutter ridges and pressure ridges can be noticed in the area. The age of both cliffs is estimated to be upper Late Pleistocene--early Holocene.

关键词： Neotectonic erosional cliff alluvial fan Pleistocene Iraq.

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Three-Dimensional P-Wave Velocity Structure of the Crust of North China

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Journal of China University of Geosciences 2007年第3期18卷 257-268页

作者：魏文博叶高峰李艳军金胜邓明景建恩 State Key Laboratory of geological Processes and Mineral Resources Geo-detection Laboratory Ministry of Education School of Geophysics and Information Technology China University of GeosciencesBeijing 100083China

Since the Xingtai （邢台） earthquake in 1966, China Earthquake Administration has carried out a survey campaign along more than thirty deep seismic sounding （DSS） profiles altogether about twenty thousand kilometers long in North China to study the velocity structure of the crust and the upper mantle in this region, and has obtained a great number of research findings. However, these researches have not provided a 3D velocity structure model of the crust of North China and cannot provide seismic evidence for the study of the deep tectonic characteristics of the crust of the whole region. Hence, based on the information from the published data of the DSS profiles, we have chosen 14 profiles to obtain a 3D velocity structure model of North China using the vectorization function of the GIS software （Arc/Info） and the Kriging data gridding method. With this velocity structure model, we have drawn the following conclusions：（1） The P-wave velocity of the uppermost crust of North China changes dramatically, exhibiting a complicated velocity structure in plane view. It can be divided into three velocity zones mainly trending towards north-west. In the research area, the lowest-velocity zones lie in the Haihe （海河） plain and Bohai （渤海） Bay. Although the geological structure of the sedimentary overburden in the study area is somewhat inherited by the upper crust, there are still several differences between them. （2） Generally, the P-wave velocity of the crust increases with depth in the study area, but there still exists local velocity reversion. In the east, low-velocity anomalies of the Haihe plain gradually disappear with increasing depth, and the Shanxi （山西） graben in the west is mainly characterized by relatively low velocity anomalies. Bounded by the Taihang （太行） Mountains, the eastern and western parts differ in structural trend of stratum above the crystalline basement. The structural trend of the Huanghuaihai （黄淮海） block in the east is mainly north-east, while that of t

关键词： North China crust deep seismic sounding three-dimensional P-wave velocity structure

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中(西)澳地质填图对比及对中国地质填图的启示

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地质通报 2015年第12期34卷 2143-2149页

作者：李建星 Chen Shefa 毛晓长邱士东孟勇郭琳中国地质调查局西安地质调查中心陕西西安710054 Geology Servey of western australia Western AustraliaPerth 6004 中国地质调查局北京100037

为了解发达国家最新填图工作方法,吸取其精华并进一步完善国内填图方法、提高填图质量,中国地质调查局西安地质调查中心与西澳大利亚地调局开展了为期4年的地质填图技术方法交流合作。基于西澳大利亚州(以下简称西澳)伊尔岗克拉通和中... 详细信息

为了解发达国家最新填图工作方法,吸取其精华并进一步完善国内填图方法、提高填图质量,中国地质调查局西安地质调查中心与西澳大利亚地调局开展了为期4年的地质填图技术方法交流合作。基于西澳大利亚州(以下简称西澳)伊尔岗克拉通和中国西部北山造山带3年的实地填图工作,系统地对比了中国与西澳地质填图的异同。双方在工作思路、工作程序等方面基本一致,但是在成果表达、数据集成、人员组织、质量管理等方面存在系统差异。对所有实体按照岩性进行划分和填图是西澳长期以来地质填图的基本思想,也是中国地质填图现在及将来努力的方向。系统逻辑的数据集成与共享也是值得借鉴的一个重要方面。地质调查、科研相结合与高素质人员进军地调队伍是提高填图质量的前提和基础,着眼于大区域的工作部署和稳定的区域地质调查队伍是加快填图速度的重要保障。

关键词：地质填图对比中国西澳大利亚州

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