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川西雅江地区构造-岩石变形特征及其控灾机制 被引量:4
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作者 熊小辉 白永健 铁永波 《现代地质》 CAS CSCD 北大核心 2021年第1期145-152,共8页
川西雅江地区发育系列复式背斜、复式向斜及其伴生断裂的褶-断式构造组合样式。受强烈构造改造,岩石变形主要呈现出柔性滑脱、顺层剪切、脆性弯折、沿结构面强卸荷、大位移错动、断层破碎以及褶皱劈理化等7类样式。构造-岩石组合塑造着... 川西雅江地区发育系列复式背斜、复式向斜及其伴生断裂的褶-断式构造组合样式。受强烈构造改造,岩石变形主要呈现出柔性滑脱、顺层剪切、脆性弯折、沿结构面强卸荷、大位移错动、断层破碎以及褶皱劈理化等7类样式。构造-岩石组合塑造着该区域雅砻江展布与深切河谷的演化,而河谷演化与构造改造共同控制着区域滑坡、崩塌等地质灾害的发育与分布。不同的岩石变形样式孕育不同类型的地质灾害,而岩性组合关系控制地质灾害发育的规模。受砂岩板岩互层弯折变形的控制,斜坡主要产生倾倒弯折→拉裂→滑移→失稳破坏→堵塞河道或阻断道路等多阶段变形破坏模式,形成雅江地区滑坡灾害最主要的成灾模式。 展开更多
关键词 雅江地区 地质构造 岩石变形 地灾分布 控灾机制
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西部清洁能源大基地建设下的科技旅游开发模式研究——以雅江中游地区为例
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作者 何永胜 余凌 申剑 《可持续发展》 2023年第5期1599-1608,共10页
西部清洁能源大基地建设下科技与旅游的融合为西藏地区的经济发展提供了新的契机。本文通过梳理国内外科技旅游发展现状,选取雅江中游地区作为科技旅游开发模式研究对象。在确立多元化开发目标的基础之上,从主体、空间、产业、产品以及... 西部清洁能源大基地建设下科技与旅游的融合为西藏地区的经济发展提供了新的契机。本文通过梳理国内外科技旅游发展现状,选取雅江中游地区作为科技旅游开发模式研究对象。在确立多元化开发目标的基础之上,从主体、空间、产业、产品以及要素五个方面分析了开发依托条件,并提出了一种全新的开发主体与非开发主体共同参与的立体三螺旋协同创新开发模式,使得科技旅游开发与当地脆弱的生态环境相适应,清洁能源基地与旅游业相结合,新能源科技与传统藏族文化有机融合。 展开更多
关键词 科技旅游 清洁能源基地 三螺旋模式 雅江中游地区
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川西雅江—道孚地区三叠系西康群若干地质问题研究进展与分歧 被引量:5
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作者 刘旗 王帮全 +1 位作者 李振江 徐天德 《四川地质学报》 2003年第2期70-76,共7页
对川西雅江—道孚地区三叠系西康群含义及层序重新作了厘定;对杂谷脑组解体,重新定义认识的分歧,如年各组碳酸盐岩块砾混积层在西康群地层柱中的位置,进行了探讨命名地罗空松多组和新都桥组层位关系的新认识,双壳类(Pergamidia)在西康... 对川西雅江—道孚地区三叠系西康群含义及层序重新作了厘定;对杂谷脑组解体,重新定义认识的分歧,如年各组碳酸盐岩块砾混积层在西康群地层柱中的位置,进行了探讨命名地罗空松多组和新都桥组层位关系的新认识,双壳类(Pergamidia)在西康群中的分布及意义等若干地质问题进行了探讨,并作了总结与评述。 展开更多
关键词 雅江-道孚地区 三叠系 西康群 地层层序 四川 碳酸盐岩块砾混积层
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The Relationship between Normalized Difference Vegetation Index(NDVI) and Climate Factors in the Semiarid Region:A Case Study in Yalu Tsangpo River Basin of Qinghai-Tibet Plateau 被引量:11
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作者 GUO Bing ZHOU Yi +1 位作者 WANG Shi-xin TAO He-ping 《Journal of Mountain Science》 SCIE CSCD 2014年第4期926-940,共15页
The Yalu Tsangpo River basin is a typical semi-arid and cold region in the Qinghai-Tibet Plateau, where significant climate change has been detected in the past decades. The objective of this paper is to demonstrate h... The Yalu Tsangpo River basin is a typical semi-arid and cold region in the Qinghai-Tibet Plateau, where significant climate change has been detected in the past decades. The objective of this paper is to demonstrate how the regional vegetation, especially the typical plant types, responds to the climate changes. In this study, the model of gravity center has been firstly introduced to analyze the spatial-temporal relationship between NDVI and climate factors considering the time-lag effect. The results show that the vegetation grown has been positively influenced by the rainfall and precipitation both in moving tracks of gravity center and time-lag effect especially for the growing season during the past thirteen years. The herbs and shrubs are inclined to be influenced by the change of rainfall and temperature, which is indicated by larger positive correlation coefficients at the 0.05 confidence level and shorter lagging time. For the soil moisture, the significantly negative relationship of NDV-PDI indicates that the growth and productivity of the vegetation are closely related to the short-term soil water, with the correlation coefficients reaching the maximum value of o.81 at Lag 0-1. Among the typicalvegetation types of plateau, the shrubs of low mountain, steppe and meadow are more sensitive to the change of soil moisture with coefficients of -0.95, -0.93, -0.92, respectively. These findings reveal that the spatial and temporal heterogeneity between NDVI and climatic factors are of great ecological significance and practical value for the protection of eco-environment in Qinghai-Tibet Plateau. 展开更多
关键词 Climate change Gravity center Correlation coefficients Vegetation productivity Time-lag effect
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Zircon SHRIMP geochronology and Nd-Pb isotopic characteristics of the meta-basalt in the central part of Tibetan Plateau's Qiangtang region 被引量:5
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作者 PENG ZhiMin GENG QuanRu +4 位作者 PAN GuiTang WANG LiQuan ZHANG Zhang CONG Feng GUAN JunLei 《Science China Earth Sciences》 SCIE EI CAS 2014年第3期428-438,共11页
A small-sized meta-basic rock system is discovered in Qilongwuru Gully of Central Qiangtang’s Shuanghu region and contains a meta-basalt and garnet-bearing plagioclase amphibolite.The zircon U/Pb age of this meta-bas... A small-sized meta-basic rock system is discovered in Qilongwuru Gully of Central Qiangtang’s Shuanghu region and contains a meta-basalt and garnet-bearing plagioclase amphibolite.The zircon U/Pb age of this meta-basalt by SHRIMP analysis is463.3±4.7 Ma,suggesting that this lava formed in the Middle Ordovician,and is consistent with that of the meta-basic rocks in the Taoxing Lake and Guoganjianian Mountain ophiolite found in the Qiangtang plate.As this lava system bears similar geochemistry to N-MORB,it might be a component of ophiolite that represents the trail of the extinction of the Proto-Tethys,suggesting that the formation of Proto-Tethys oceanic basin in the Longmu Co-Shuanghu suture zone could date as far back as to the Middle Ordovician.Isotopic geochemical analysis indicates that the magma source area consists of both depleted mantle(DM)and enriched mantle(EMII)end members and bears Dupal anomaly,similar to that of the Paleo-Tethys in the Neo-Tethys represented by the Yarlung-Tsangpo suture zone,the Paleo-Tethys represented by the Changning-Menglian suture zone,and the Paleo-Tethys in Sanjiang region.This suggests that they have inherited the attribute of the Proto-Tethys mantle domain,and the Longmu Co-Shuanghu suture zone may be a representative of the northern boundary of Gondwana. 展开更多
关键词 Tibetan Plateau's Qiangtang region meta-basalt zircon U-Pb age TETHYS Nd-Pb isotope
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