检索结果-南通市图书馆

Journal of Earth Science 2024年第1期35卷 131-143页

作者： Dan Wang youpu dong Zhipeng Xi dongyue Zhang Jiaxin Duan Huayu Yu Liang Yu Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming 650093China

The Gengma-Lancang-Menghai seismic belt,the southernmost part of the North-South seismic belt,is controlled by four active faults:the Nantinghe fault(NTHF),the Sanjianshan fault(SJSF),the Hanmuba-Lancang fault(HMB-LCF),and the Heihe fault(HHF),from northwest to ***,the tectonic activity of the faults in the Gengma-Lancang-Menghai seismic belt has not been fully studied *** the present work,we conducted tectonic geomorphic indices to analyze the relative tectonic activity along the faults in the seismic belt based on the digital elevation *** interpreted asymmetric factor,index of drainage basin shape,hypsometric integral,normalized streamlength gradient,valley floor-to-width to height ratio,and longitudinal profiles to show that the relative tectonic activity is higher in the north and lower in the south,and is strong in the region from Shanjia to Huimin in the center of the seismic belt.

关键词： Gengma-Lancang-Menghai seismic belt southeastern Tibetan Plateau geomorphic indices longitudinal profile

Uplift of the central part of the Jinsha River， southeastern Tibetan Plateau: Evidence from apatite fission track dating and bedrock channel longitudinal profiles

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2024年

作者： Yangyang Ren youpu dong Wenchang Li Faculty of Land Resource Engineering， Kunming University of Science and Technology

The initial timing of uplift at the southeastern margin of the Tibetan Plateau (SMTP) remain under debate， with estimates ranging from the Eocene， to the Oligocene. The Jinsha River was formed before the Miocene， therefore， it is likely to record the uplift information of the Tibetan Plateau， which is important for understanding the tectonic uplift of the SMTP. Here， we collected granite samples from the Yangla area in the middle part of the Jinsha River， and analyzed the uplift characteristics of the Cenozoic in the middle part of the Jinsha River by using the apatite fission tracks and the river longitudinal profiles. We show shat the uplift time of the first phase is about 25–20 Ma， and the uplift time of the second phase is about 5 Ma; From the channel profile， seven tributaries of the Jinsha Rivers also have developed two phase of knickpoints. The tributaries consist of three sections with distinct geomorphological parameters， each separated by knickpoints. We argue that large-scale uplift occurred in the Late Cenozoic on the SMTP， with different locations having different uplift times， and the interior may have undergone significant uplift in the Early Oligocene， but significant uplift of the SMTP occurred by the Late Oligocene to Early Miocene. The Jinsha River flowing from the interior of the plateau have developed multiple knick points during the uplift process， recording information of the uplift of the Tibetan Plateau.

关键词：

Erratum to: Evaluation of the Relative Tectonic Activity from the Faults in the Gengma-Lancang-Menghai Seismic Belt (Southwestern China)

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 2024年第3期35卷 1087-1087页

作者： Dan Wang youpu dong Zhipeng Xie dongyue Zhang Jiaxin Duan Huayu Yu Liang Yu Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming 650093China

The original version of this article unfortunately contained a *** presentation of an author's name was *** corrected oneis given below.

关键词： Seismic Lancang Tectonic

基于构造地貌学的南盘江与红河分水岭特征分析

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

地质科学 2024年第2期59卷 535-548页

作者：童方彤董有浦刘益毛黎光李旭英昆明理工大学国土资源工程学院昆明650093 中国矿业大学地球科学与测绘工程学院北京100083 昆明理工大学城市学院昆明650051

红河曾经在古新世—始新世晚期发源于青藏高原内部,大约渐新世开始其流域面积逐渐缩小。自渐新世至今,青藏高原东南缘发育了一系列大规模走滑断裂。走滑断裂能够影响河流的流向、坡度以及河道形态等。在这些走滑断裂影响下,红河的流域... 详细信息

红河曾经在古新世—始新世晚期发源于青藏高原内部,大约渐新世开始其流域面积逐渐缩小。自渐新世至今,青藏高原东南缘发育了一系列大规模走滑断裂。走滑断裂能够影响河流的流向、坡度以及河道形态等。在这些走滑断裂影响下,红河的流域面积是否会发生规律性的变化?本文以南盘江和红河流域分水岭为研究对象,探究红河在红河断裂、建水断裂及文麻断裂等走滑断裂的影响下,其分水岭的迁移特征。本文利用90 m分辨率的DEM提取了红河、南盘江的33条子流域,通过计算获得面积高程积分(HI)、谷底宽高比(VF)、河流陡峭指数(K_(sn))和chi(χ)值4个地貌参数,结合野外调查揭示研究区构造活动性差异及分水岭的变化规律。结果显示,研究区分水岭呈分段性变化:龙树村—店房村段向南盘江迁移;店房村—腊梅村段向红河迁移,HI值、VF值及Ksn值三者所得结果与chi(χ)值结果对马鹿山—龙树村段存在不同认识。从整体上看,红河在逐渐失去其流域面积。非构造因素(降雨和岩性)不是控制研究区分水岭迁移的主要因素,研究区分水岭迁移主要受研究区内红河断裂、建水断裂、曲江断裂、文麻断裂及小江断裂南段的构造活动性强弱影响。

关键词：红河南盘江分水岭地貌参数构造活动性

川滇地块东部老鹰山的构造地貌特征及其揭示的地块隆升和旋转运动

在线全文

学校读者我要写书评

暂无评论

地质力学学报 2024年第4期30卷 535-546页

作者：徐琴如董有浦谢志鹏任洋洋李江涛曹登驰苏小龙昆明理工大学国土资源工程学院云南昆明650093

印−欧大陆板块的碰撞与挤压造成了青藏高原的隆升和陆内变形,同时引起川滇菱形地块的侧向逃逸与旋转,目前针对川滇菱形地块中部和西部地区的旋转量已进行了大量古地磁研究,但对其东部地区的旋转研究相对缺少。由于河流地貌对地块的旋转... 详细信息

印−欧大陆板块的碰撞与挤压造成了青藏高原的隆升和陆内变形,同时引起川滇菱形地块的侧向逃逸与旋转,目前针对川滇菱形地块中部和西部地区的旋转量已进行了大量古地磁研究,但对其东部地区的旋转研究相对缺少。由于河流地貌对地块的旋转量十分敏感,因此,研究利用30 m分辨率的数字高程模型(DEM)提取了川滇菱形地块东部老鹰山地区的22个流域盆地,通过分析其局部地形起伏比、河流纵剖面、河流陡峭指数以及流域方位角4个地貌参数来确定老鹰山地区的地块旋转量和隆升量。研究结果显示:老鹰山地区自晚中新世以来,隆升量约为358 m,隆升趋势为北高南低;河流陡峭指数值整体分布趋势由北向南逐渐降低,高值区主要分布在老鹰山地区北部,低值区主要分布在研究区老鹰山顶部以及老鹰山地区南部;同时根据流域方位角结果表明老鹰山地区旋转量为逆时针旋转15°左右。研究表明自晚中新世以来,川滇地块内元谋断裂以西受走滑断裂影响较小,主要为顺时针旋转;元谋断裂以东受走滑断裂等强烈的左行走滑影响,发生了逆时针旋转并伴随着差异隆升。

关键词：地块旋转地块隆升构造地貌学小江断裂川滇地块东部

Cenozoic Uplift of the Central Yunnan Fragment, Southwestern China, Revealed by Apatite(U-Th)/He Dating

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2020年第4期31卷 735-742页

作者： Ke Wu youpu dong Jiaxin Duan Xin Ru dongyue Zhang Dan Wang Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming 650093China

The age of central Yunnan fragment uplift has long been debated, with estimates ranging from the Late Eocene to about 1 Ma. To determine the central Yunnan fragment uplift time in the Cenozoic, apatite(U-Th)/He(AHe) was used to analyze the low-temperature thermochronology of samples from the Jiaozi Mountain area of the eastern central Yunnan fragment. The sampling area is located in the dongchuan District of Kunming, Yunnan Province, near the Xiaojiang fault zone. The results show that AHe ages from the eastern part of central Yunnan fragment were mainly concentrated around 25.7–37.9 Ma, and intensive uplift had happened before 36.5 Ma. Together with previous low-temperature thermochronology research on the western and eastern central Yunnan fragment, we concluded that the Yunnan Plateau uplifted prior to 36.5 Ma, in a west to east sequence. The uplift caused a change in paleo-geographical terrain, which may have altered the ancient river systems of the southeast Tibetan Plateau.

关键词： central Yunnan fragment (U-Th)/He dating uplift Cenozoic

3D Seismic Attributes for Structural Analysis in Compressional Context: A Case Study from Western Sichuan Basin

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2014年第6期25卷 985-990页

作者： Bo Xu Ancheng Xiao Lei Wu Liguang Mao youpu dong Lijun Zhou Department of Earth Sciences Zhejiang University Research Center for Structures in Oil & Gas Bearing Basins Ministry of Education Geophysical and Geochemical Exploration Institute of Zhejiang Department of Earth Science Kunming University of Science and Technology

Compressional region usually forms complex thrust faults system, which is difficult to identify using traditional migration profiles. The successful application of three-dimensional（3D） seismic attributes analysis greatly reduces the difficulty, and improves the accuracy and efficiency of seismic interpretation and structural analysis. In this paper, we took Qiongxi area in the compressional region of western Sichuan as an example, using two 3D seismic attributes, coherence and instantaneous phase, to identify fault assemblages and variations both vertically and laterally. The results show that the study area mainly consists of NS-, NE- and NEE-trending faults. The NS-trending faults are the largest and have a component of sinistral slip controlling the formation of NEE-trending faults, while the NE-trending faults are intermediate in scale, formed earlier and were cut by the NS-trending faults. Our results demonstrate that using seismic attributes for structural analysis have the following advantages：（1） more details of major fault zones,（2） highlighting minor faults which are hardly traced in seismic migration cube, and（3） easier acquisition of accurate fault systems. The application of seismic attributes provides a new idea for deciphering fine and complicated structures, and will significantly contribute to the development of objective and precise geological interpretation in the future.

关键词： structural analysis 3D seismic attribute compressional geological setting western Sichuan Basin Qiongxi

Cenozoic tectonic and sedimentary evolution of southern Qaidam Basin, NE Tibetan Plateau and its implication for the rejuvenation of Eastern Kunlun Mountains

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2014年第11期57卷 2726-2739页

作者： MAO LiGuang XIAO AnCheng WU Lei LI BenLiang WANG LiQun LOU QianQian dong youpu QIN SuHua Department of Earth Sciences Zhejiang University Research Center for Structures in Oil & Gas Bearing Basins Ministry of Education PetroChina Research Institute of Petroleum Exploration & Development Qinghai Oilfield Company PetroChina Zhejiang No.3 Geology Group Research Institute of BGP inc. China National Petroleum Corporation

The Eastern Kunlun Mountains play an important role in the growth and eastward extrusion of the Tibetan Plateau. Tectonic and sedimentary study of the Cenozoic Qaidam Basin, especially the southern part, provides key evidence for understanding their evolution. Here we present evidence including isopach maps, seismic sections and sedimentary analysis of single well to illustrate the sedimentary development of the basin and the structural features of its southern margin. The Qaidam Basin extended across Qiman Tagh-Eastern Kunlun Mountains in the early Cenozoic and withdrew northward at ca. 35.5 Ma, and then buckled as an EW striking elliptical depression since ca. 14.9 Ma, with the main depocenter migrating eastward. Our results support the view that the Kumukol and Hoh Xil basins joined the Qaidam Basin in the early Cenozoic time and we propose the Eastern Kunlun Mountains uplifted in the mid-Miocene.

关键词： NE Tibetan Plateau Qaidam Basin Eastern Kunlun Cenozoic mid-Miocene

New Conceptual Fold-Fracture Model Including Prefolding Fractures,Based on Fuyang-Lin'an Anticline,Zhejiang Province

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2014年第5期25卷 901-911页

作者： youpu dong Ancheng Xiao Lei Wu Xuying Li Department of Earth Sciences Faculty of Land Resource Engineering Kunming University of Science and Technology Department of Earth Sciences Zhejiang University Research Center for the Structures in Oil and Gas Bearing Basin Ministry of Education Department of Architecture City College Kunming University of Science and Technology

Field observations of the crossing relationships of fractures have been used to explain the sequence of fractures. Based on field observations from Fuyang-Lin＇an anticline, located near Hangzhou, Zhejiang Province, this paper proposes that the formation of synfolding fractures was influenced dominantly by one fracture set, which developed prior to folding and the orientation was nearly parallel to the bedding. The length of the prefolding fractures is longer than the synfolding fractures. These prefolding fractures cut thicker strata into small pieces and form a dense network of fractures in thicker strata. Most synfolding fractures, which are oblique to the bedding, are truncated by prefolding fractures in thicker strata. The synfolding fractures, which result from local stress, are inferred to form during folding. Here, the mechanism of truncation was analyzed using finite-element models. The approach was based on the idea that natural fractures can be interpreted or inferred from stress distribution. The presence or absence of prefolding fractures is shown to strongly control the distribution of stress, and this control has an important implication for interpreting the fracture truncation mechanism from geomechanical models.

关键词： folding fracturing sequence model finite-element.

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2012年第12期55卷 926-939页

作者： WU Lei XIAO AnCheng WANG LiQun MAO LiGuang WANG Liang dong youpu XU Bo Department of Earth Sciences Zhejiang University Hangzhou 310027 China Research Center for Structures in Oil ＆ Gas Bearing Basins Ministry of Education Hangzhou 310027 China Research Center of Qinghai Oilfield Company PetroChina Dunhuang 736200 China Beijing Geological Survey Beijing 1022061 China

The Altyn Tagh Fault and the Altyn Mountain define respectively the tectonic and geographical northern edges of the Tibetan Plateau, and figure prominently in the growth and rising mechanism of the plateau. The rhombus-shaped Altyn Mountain has long been thought to have an intimate relation with the Altyn Tagh Fault; however, its formation mechanism remains unclear and debatable. In this paper, we focus on the EW-trending uplifts in the Altyn Mountain, and investigated three Cenozoic sedimentary sections in the vicinity of the EW-trending uplifts located along the southern side of the central segment of the Altyn Tagh Fault. Magnetostratigraphy and pollen analysis were used to constrain ages of the sediments. Clast composition of conglomerate and paleocurrents obtained from clast imbrications were applied to determine the provenance. We also established a geological section parallel to the Altyn Tagh Fault on sedimentary facies across the northwestern Qaidam Basin. The results indicate that these en-echelon EW-trending uplifts formed as early as ca. 36 Ma and were preferred to be under the control of basal shear of the Altyn Tagh Fault in the middle-lower crust, symbolizing the early uplift of the Altyn Mountain during the Cenozoic. Left-slip along the Altyn Tagh Fault occurring during the Miocene and afterwards displaced and altered these uplifts, shaping the Altyn Mountain to its present fabric.

关键词： Northern Tibetan Plateau Altyn Tagh Fault Aityn Mountain EW-trending uplift Qaidam Basin

同方期刊数据库