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Landslide Susceptibility Mapping Using RBFN-Based Ensemble Machine Learning Models

Computer Modeling in Engineering & Sciences 2025年第1期142卷 467-500页

作者： Landslide Susceptibility Mapping Using RBFN-Based Ensemble Machine Learning Models Duc-Dam Nguyen Nguyen Viet Tiep Quynh-Anh Thi Bui Hiep Van Le Indra Prakash Romulus Costache Manish Pandey Binh Thai Pham Faculty of Civil Engineering University of Transport TechnologyThanh XuanHa Noi100000Vietnam Faculty of Hydraulic Engineering Hanoi University of Civil EngineeringHa Noi100000Vietnam DDG(R)geological Survey of India Gandhinagar382010India Research institute of the University of Bucharest Bucharest050663Romania National institute of Hydrology and Water Management Bucharest013686Romania Department of Civil Engineering Transilvania University of BrasovBrasov500152Romania Danube Delta National institute for Research and Development Tulcea820112Romania Marwadi University Research Center(MURC) Marwadi UniversityRajkotGujaratBharat360003India Department of Civil Engineering Faculty of Engineering&TechnologyMarwadi UniversityRajkotGujaratBharat360003India

This study was aimed to prepare landslide susceptibility maps for the Pithoragarh district in Uttarakhand,India,using advanced ensemble models that combined Radial Basis Function Networks(RBFN)with three ensemble learning techniques:DAGGING(DG),MULTIBOOST(MB),and ADABOOST(AB).This combination resulted in three distinct ensemble models:DG-RBFN,MB-RBFN,and ***,a traditional weighted method,Information Value(IV),and a benchmark machine learning(ML)model,Multilayer Perceptron Neural Network(MLP),were employed for comparison and *** models were developed using ten landslide conditioning factors,which included slope,aspect,elevation,curvature,land cover,geomorphology,overburden depth,lithology,distance to rivers and distance to *** factors were instrumental in predicting the output variable,which was the probability of landslide *** analysis of the models’performance indicated that the DG-RBFN model,with an Area Under ROC Curve(AUC)of 0.931,outperformed the other *** AB-RBFN model achieved an AUC of 0.929,the MB-RBFN model had an AUC of 0.913,and the MLP model recorded an AUC of *** results suggest that the advanced ensemble ML model DG-RBFN was more accurate than traditional statistical model,single MLP model,and other ensemble models in preparing trustworthy landslide susceptibility maps,thereby enhancing land use planning and decision-making.

关键词： Landslide susceptibility map spatial analysis ensemble modelling information values(IV)

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Chemical geothermometry:application to mud volcanic waters of the Caucasus region

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Frontiers of Earth Science 2020年第4期14卷 738-757页

作者： Olga E.Kikvadze Vasilii Yu.Lavrushin Boris G.Polyak geological institute Russian Academy of SciencesMoscow119017Russia Siberian Branch of the ras V.S.Sobolev Institute of Geology and MineralogyNovosibirsk630090Russia

The generation temperatures of gas-water fluids released from mud volcanoes in different provinces of the Caucasian region have been constrained using Mg/Li(T_(Mg/Li))chemical *** volcanic fluids in the Taman Peninsula(Kerch-Taman mud volcanic province)were generated at temperatures(T_(Mg/Li))from 41℃ to 137℃.The depths of the respective mud reservoirs estimated from T_(Mg/Li) values and local geothermal gradient are in a range of 1.0 to 3.4 km which spans the Maykop Formation of marine *** the South Caspian province,the T_(Mg/Li) values of waters vary from 18℃ to 137℃ and the respective root depths HMg/Li of mud volcanoes range from∼0.85 to 6.5 *** obtained T_(Mg/Li) values for the analyzed mud volcanic waters from Caucasian provinces are in positive correlation with HCO3^(−)contents and water oxygen isotope compositions(δ^(18)OH_(2)O andΔδ^(18)OH_(2)O)and in high negative correlation with Cl^(−).The increase of T_(Mg/Li) toward the Greater Caucasus Range,as well as the lateral T_(Mg/Li) patterns in the Taman and South Caspian mud volcanic provinces,support the idea that mud volcanic fluids generate at temperatures increasing progressively toward the Alpine orogenic belt.

关键词： mud volcano fluid chemical geothermometry stable isotopes Caucasus region

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Environmental and tectonic significance of Late Permian reefs in the Linxi and adjacent areas in Inner Mongolia of China

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Science China Earth Sciences 2016年第7期59卷 1463-1476页

作者： TIAN Shu Gang ZHANG Yong Sheng GONG Yue Xuan LI Zi Shun GAO Lian Da ZHAI Da Xing ZHU Chang Wei institute of Geology Chinese Academy of Geological Sciences institute of Mineral Resources Chinese Academy of Geological Sciences Department of Science and Technology Chinese Academy of Geological Sciences

Many plateau-edge reefs and reef mounds of the Late Permian have been discovered in Linxi County and adjacent areas of Inner Mongolia, China. These reefs verify that the Hinggan-Inner Mongolia Area was an open and unobstructed sea-trough in Late Permian. Facies and sequences of reef strata in Member 4 and Member 5 of the Linxi Formation were studied for information to reconstruct the closing process of the Linxi-Jiutai chasm in the sea-trough, i.e., to constrain subsidence, uplift, and final closing. Ages of the reef-bearing strata have been determined to be late and end of Late Permian, based on ranges or abundances of diverse fossils. Six reef-building organic assemblages were distinguished, representing different ecologic conditions, according to morphological functions and paleoecological adaptations of organisms including primarily sponges, bryozoans, and calcareous algae. Two types of shelf slopes, the gentle slope and the steep slope, have been interpreted for Member 4 and Member 5 of the Linxi Formation, based on the assemblages. The locations of outcrops, and types of these reefs delineate the north margin of Sino-Korea Platform, and define uplift and final closing of the Linxi-Jiutai chasm at the end of Late Permian.

关键词： Reefs Facies sequence Paleoecology Late Permian Inner Mongolia

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Zircon Dating and geological Implications of Granitic Gneiss in the Metamorphic Zone of Gaoligong Mountains in Western Yunnan, China

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Acta Geologica Sinica(English Edition) 2013年第2期87卷 440-453页

作者： TAN Xiaohong ZHAO Bo LI Xikang XU Zhangbao ZHANG Zhen institute of geological survey of Yunnan Province institute of Mineral Resources Chinese Academy of Geological Sciences

The general classification of intermediate-acid intrusive rocks in the metamorphic zone of Gaoligong Mountains as one of the metamorphic terranes of Proterozoic Gaoligong Mountains is problematic regarding the intrusion stage and age, as well as the subsequent metamorphism and deformation. In this study, we investigated granitic gneiss in the metamorphic zone of Gaoligong Mountains based on the 1：50,000 regional geological survey of Qushi Street （2011-2013） and SHRIMP U-Pb zircon geochronology. Results showed that the SHRIMP U-Pb zircon dating of granitic gneiss ranged from 163.5±5.7 Ma to 74.0±2.0 Ma. Thus, the granitic gneiss was grouped into orthometamorphic rocks （metamorphic intrusions）. The dating data of granite rocks associated with intense metamorphism and deformation were divided into three groups, 163.5±5.7 to 162.3±3.1 Ma, 132.2-101.0 Ma and 99.4±3.5-74.0±2.0 Ma, which respectively represented three independent geologic events including an important magma intrusion with superimposed metamorphic effects in the late Middle Jurassic, regional dynamic metamorphism and superimposed reformation of fluid action in the early Cretaceous, and dynamic metamorphism dominated by ductile shear and metamorphism starting from the late Cretaceous.

关键词： Metamorphic zone granitic gneiss U-Pb zircon age Gaoligong Mountains Western Yunnan

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A New Oviraptorid Dinosaur (Theropoda: Oviraptorosauria) from the Late Cretaceous of Jiangxi Province, Southern China

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Acta Geologica Sinica(English Edition) 2013年第4期87卷 899-904页

作者： WEI Xuefang PU Hanyong XU Li LIU Di Lü Junchang institute of Geology Chinese Academy of Geological Sciences Henan geological Museum

A new oviraptorid dinosaur Jiangxisaurus ganzhouensis gen. et sp. nov., is erected based on a partial skeleton from the Upper Cretaceous Nanxiong Formation of Ganzhou City, Jiangxi Province. The new taxon differs from other oviraptorids in the weakly downturned rostrum of the lower jaw, much-elongated mandible with a height-to-length ratio being about 20% and the length ratio of radius to humerus of about 0.70. This species not only adds a new member to oviraptorid dinosaurs, but also provides more information about oviraptorid paleogeographical distribution in southern China.

关键词： Oviraptoridae Jiangxisaurus Nanxiong Formation Upper Cretaceous Ganzhou Basin,Jiangxi Province

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Neoproterozoic Volcanic Rocks in the Southern Quruqtagh of Northwest China:Geochemistry,Zircon Geochronology and Tectonic Implications

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Acta Geologica Sinica(English Edition) 2013年第1期87卷 118-130页

作者： ZHANG Yingli WANG Zongqi YAN Zhen WANG Tao institute of Mineral Resources Chinese Academy of Geological Sciences institute of Geology Chinese Academy of Geological Sciences

The Early Neoproterozoic Beiyixi Formation volcanic rocks of the southern Quruqtagh comprise mainly of a suite of tholeiitic basalts, alkaline andesites, and calc-alkaline rhyolites. The rhyolites are characterized by variably fractionated enrichment in light rare earth elements （LREE） and fiat in heavy rare earth elements （HREE）, and strongly negative Eu anomalies. Compared to the rhyolites, the andesites also exhibit enrichment in LREE and flat HREE （chondrite-normalized values of La/Yb,and La/Sm are 13.30-41.09, 3.18-6.89 respectively）. Their rare earth element patterns display minor negative Eu anomalies. Both of them exhibit coherent patterns with strongly to moderately negative anomalies of Nb, Zr, Ti, and Hf on spider diagrams. Two rhyolite and one andesite magmatic zircons with defined oscillatory zoning yielded weighted mean 206pb/23Su ages of 743 ± 7 Ma, 741±2 Ma, and 7274 Ma. These ages are interpreted to represent the timing of volcanic eruptions. According to geochemistry and rock type, these volcanic rocks formed within a continental island-arc environment following subduction of the oceanic crust during the Early Neoproterozoic period.

关键词： Quruqtagh Beiyixi Formation volcanic rocks geochemistry zircon geochronology,tectonic setting

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The Oldest Grey Gneisses and Tonalite-Trondhjemite Granodiorites in the Fennoscandian Shield: ID-TIMS and SHRIMP Data

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Open Journal of Geology 2020年第2期10卷 124-136页

作者： Tamara Bayanova Evgeniy Kunakkuzin Pavel Serov Ekaterina Steshenko Elena Borisenko Alexander Larionov Olga Turkina geological institute ksc ras Apatity Russian Federation A.P. Karpinsky Russian geological Research institute (VSEGEI) St. Petersburg Russian Federation institute of Geology and Mineralogy Siberian Branch RAS Novosibirsk Russian Federation

Genesis of the oldest continental crust retains a marked trace in the Earth’s evolution over its 4.5 Ga history. Despite ample isotope data on the role of the continental crust in the Earth’s evolution, there has been much debate on the origin of grey gneisses and tonalite-trondhjemite-granodiorites (TTG). Precise U-Pb (ID-TIMS) and SHRIMP data on single zircon for paragneisses and TTG (3158.2 ± 8.2 Ma) have indicated the Central-Kola and Belomorian (White Sea) megablocks of the Fennoscandian Shield to be 3.16 Ga and 3.70 Ga, respectively. The newly obtained ages of zircon from these megablocks indicate the origin of the discrete continental crust to be 3.16 and 3.70 Ga. It is close to the Nordsim zircon data on the Siurua TTG (Finland), which are 3.45 and 3.73 Ga in the core. The new summarized data on the Earth’s oldest rocks (basement and continental crust) indicate the younger age of the rocks in the Fennoscandian Shield as compared to those in Australia (Kronendonk et al., 2019).

关键词： Fennoscandian Shield Geochronology Hadean ID-TIMS SHRIMP TTG Grey Gneiss

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Deep seated magmas and their mantle roots:Introduction

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Geoscience Frontiers 2017年第4期8卷 617-619页

作者： Igor V.Ashchepkov Nick M.W.Roberts V.S.Sobolev institute of Geology and Mineralogy SB ras NERC Isotope Geosciences Laboratory British Geological Survey

In the last decade there has been a considerable effort to better understand the joint evolution of mafic and ultramafic magmatic systems and their deep mantle roots,through integrated petrological and thermo-barometric *** generation is regarded as the result of complex processes including melting,creation of channels for melt transfer,and interaction with the wall-rocks.

关键词： mantle magmatic creation branching melting garnet roots enriched geochemistry beneath

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A Preliminary Review of Metallogenic Regularity of Silver Deposits in China

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Acta Geologica Sinica(English Edition) 2015年第3期89卷 1002-1020页

作者： JIANG Biao ZHANG Daquan WANG Denghong WANG Chenghui CHEN Yuchuan BAI Ge institute of Mineral Resources Chinese Academy of Geological Sciences China geological Survey Chinese Academy of geological Sciences

China has widely distributed silver deposits,and is rich in silver *** silver deposits are mainly associated with Pb-Zn deposits,a number of independent silver deposits have also been discovered in recent *** deposits include different types,such as submarine volcanism and continental volcanism related type,intrusion related type,and sedimentary related *** study summarized the metallogenic regularity of China＇s silver deposits systematically based mainly on the data from 490 silver *** is shown that submarine volcanic sedimentary type,continental volcanic or sub-volcanic type,skarn type,hydrothermal type（including vein type and stratabound type）,sedimentary metamorphic type,sedimentary type and regolith type should be regarded as the most important prediction types of silver deposit.A total of 32 silver mineralization belts and 111 silver concentration areas have been *** map of ＂Spatial distribution of silver mineralization belts in China＂ and other series of maps finished in this study may provide a theoretical basis for the evaluation and prognosis of silver resources potential in China.

关键词： silver deposit resource characteristics silver deposit types silver mineralization belts,temporal and spatial distribution minerogenic series of silver deposits

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Geochemical Features and Metallogenic Prediction of the Caixiashan-Weiquan Area in the East Tianshan Region

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Acta Geologica Sinica(English Edition) 2012年第4期86卷 885-893页

作者： LU Lu ZHU Lixin XIAO Keyan MA Shengming YIN Jiangning XU Mingzuan Chinese Academy of geological Sciences institute of Mineral Resources Chinese Academy of Geological Sciences institute of Geophysical and Geochemical Exploration CAGS Jiangsu Provincial institute of geological Prospecting Techniques

The Caixiashan-Weiquan area is an important ore concentration area in the eastern Tianshan metallogenic belt. Firstly, this paper studies geochemical features of 1564 samples of 1：200000 stream sediments of the Matoutan mapsheet, where the Caixiashan and Weiquan deposits are located. Processing, analysis and explanation of exploration geochemical data play an important role in the procedure of finding the ore, which are related to whether the measured elements content of geochemical samples can effectively guide the work of mineral exploration. As a highly nonlinear dynamical system, the neural network is more analogous to the human brains in terms of principles and features compared with conventional geochemical approaches. It can adapt itself to the environment, sum up laws, complete pattern recognition. Secondly, the authors used the Kohonen neural network to classify all samples based on 10 mineralization elements of stream sediment samples in order to determine possible mineral ores, reduce the scope of ore targets and study indicator elements of the ninth group of samples, which is the mostly closest to the deposit. The results show that the neural network can delineate metallogenic prospective areas and is effective in the discovery of deep geochemical information.

关键词： Regional exploration geochemistry Pb-Zn deposits neural network metallogenic prediction

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