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Insights Into Cenozoic Tectonics And Climate Change In Northern Tibetan Plateau From Basin Analysis Thermochronology And Isotopic Study
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Book Synopsis Insights Into Cenozoic Tectonics and Climate Change in Northern Tibetan Plateau from Basin Analysis, Thermochronology, and Isotopic Study by : Guangsheng Zhuang
Download or read book Insights Into Cenozoic Tectonics and Climate Change in Northern Tibetan Plateau from Basin Analysis, Thermochronology, and Isotopic Study written by Guangsheng Zhuang and published by . This book was released on 2011 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tectonic and Climatic Evolution of the Central-northern Tibetan Plateau by : Lin Li
Download or read book Tectonic and Climatic Evolution of the Central-northern Tibetan Plateau written by Lin Li and published by . This book was released on 2016 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The uplift history of the Tibetan Plateau serves as key evidence for understanding the dynamic models that build the Plateau and its influence on Cenozoic climate change of East Asia. This dissertation contributes to our knowledge for the growth history of the central and northern Tibetan Plateau through sedimentary analysis of basin sequences, and stable isotope analysis of carbonate rocks and modern surface waters. Field work in the Hoh Xil basin of central Tibet, including facies analysis, paleocurrent reconstruction, detrital zircon provenance analysis, and stable isotope analysis, suggests that a unified Hoh Xil basin, including both the east and west sub-basins, experienced a transition from pre-India-Asia collision foreland basin to post-collision hinterland basin setting at around 50 Ma. The Qiangtang terrane, serving as the main source for sediments deposited in the Hoh Xil basin, experienced significant topographic growth during the Cretaceous time. Far field deformation in the Hoh Xil basin was initiated shortly after India-Asia collision; contractional deformation and concomitant filling of the Hoh Xil hinterland basin provides clues for outward and upward growth of the Tibetan Plateau during Cenozoic time. Work in the western Qaidam basin provides new lithostratigraphy and carbonate stable isotope data that records early-middle Miocene topographic growth of the northern Tibetan Plateau. A hydrological change from restricted sub-basin to open marginal basin around 20 Ma was probably caused by late Oligocene-early Miocene tectonic activity around the Qaidam basinches A major topographic growth in the northern Tibetan Plateau is inferred around 15 Ma based on a negative shift in oxygen isotopic values, sedimentary facies changes from marginal lacustrine to fluvial, and an increase in sedimentation rate. A 13-12 Ma aridification event that was observed over a large area of the northern Plateau was likely caused by continued topographic growth to a critical point to block moisture from entering the northern Tibetan Plateau. To understand the caveats of stable isotope-based paleoaltimetry in the central and northern Tibetan Plateau, a comprehensive data set of 1,315 river water samples (450 newly collected) was compiled. With this large data set, a consistently assumed, but not well-documented prerequisite is demonstrated that river waters are a good substitute for isotopic studies of precipitation on the high Tibetan Plateau on the mean annual scale. The spatial variations of [delta]18O/[delta]D and d-excess values in the plateau margins can be modeled as a Rayleigh distillation process, on which stable isotope-based paleoaltimetry is based. On the contrary, the isotopic values of meteoric waters in the interior of the plateau are controlled by the combined effects of mixing of different moisture sources, contribution of recycled moisture from local surface water evaporation, and sub-cloud evaporation. A Rayleigh distillation model modified by sub-cloud evaporation is provided to simulate the isotopic variations in the western Plateau. This new understanding indicates that stable isotope-based paleoaltimetry is most reliable in the southern margins of the Plateau, and increasingly unreliable toward the northern Plateau. In addition, the contour maps of modern isotopic variations of meteoric waters across the whole Tibetan Plateau also provide validation criteria for isotopic simulations using general circulation models"--Pages v-vi.
Book Synopsis The Evolution of the Northeastern Margin of the Tibetan Plateau by : Brian G. Hough
Download or read book The Evolution of the Northeastern Margin of the Tibetan Plateau written by Brian G. Hough and published by . This book was released on 2010 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Tracking climate change through the use of paleoclimate proxies has the potential to reveal the spatial and temporal evolution of orogens and their associated plateaux. The development of topography associated with the Cenozoic evolution of the Tibetan plateau is coupled to climate, and feedbacks between climate and tectonics occur at all scales. Because climate changes resulting from topographic growth should scale with the amount, extent, and timing of surface uplift, this dissertation documents temporal and spatial changes in paleoclimate of the northeastern margin of the Tibetan plateau since ~30 Ma, in order to delineate when the modern climate pattern was achieved and, by inference, when the Tibetan plateau reached its current dimensions. Sedimentation in basins adjacent to the plateau margin likely began in a foreland basin setting that was later segmented by the growth of basin-bounding structures presumably during upward and outward growth of the plateau. This study focuses on a number of sub-basins in northeast Tibet, including Guide, Jian Zha, Xunhua, Tong Ren, Hualong, and Linxia, that span up to 30 myr in age and range up to 3 km thick. New lithologic, magnetostratigraphic, and stable isotope records from these basins suggest that topography began to develop in the Eocene and continued through the late Miocene before jumping ~100 km outward at ~8 Ma to the Liupan Shan and Haiyuan faults. Perturbations to local climate patterns resulted from the evolution of local topography and basin segmentation. These patterns are tracked through comparison of stable isotope compositions of calcareous basin fill materials. Similarity of isotopic compositions is interpreted to reflect the presence of integrated basins whereas distinct isotopic compositions reflect unique basin hydrologies. Within the study area, changes in isotope trends are observed throughout each record indicating the influence of local climate conditions on isotopic values. Synchronous isotope changes in multiple records are observed at 18.5, 16.3, and 9.4 Ma possibly corresponding with changes in regional scale climate. A time-transgressive trend of Miocene aridification in the lee of growing topography along the plateau's northeast margin is roughly coeval with and spatially consistent with the blocking of vapor transport by west-to-east growth of eastern Tibet. Modern rainfall data collected from 2007-2009 across the Tibetan plateau's northeastern margin show seasonal trends related to changes in air temperature and elevation, but not precipitation amount or relative humidity. To assess the spatial variability and thus the degree to which any one monitoring station is representative of a large geographic region, climate variables and rainwater isotope data from seven collection stations located across the study area were compared to each other and to the Global Network of Isotopes in Precipitation (GNIP) station data from Lanzhou. Annual mean and long-term mean isotope compositions of rainfall match each other and those from the GNIP station in Lanzhou suggesting that the long-term values for any one station are representative over relatively large regions. Trends in [delta]8O and d-excess indicate that source regions for summertime precipitation in northeast Tibet are consistent with increased soil moistening and local recycling of water vapor. When carbonates derived from modern rainfall are compared to time integrated paleo-carbonate samples, no significant change in regional climate are evident since at least 3-4 Ma. The results of this thesis demonstrate that changes in local climate are related to the onset of local deformation and that deformation and associated basin segmentation in NE Tibet initiated prior to uplift of eastern Tibet. However, the timing of regional-scale climate change, highlighted by a west-to-east pattern of aridification in northern and northeastern Tibet, is consistent with the systematic displacement of vapor pathways around a progressively eastward uplifting eastern Tibetan plateau. Once established, the upwind climate regime, and by inference the topographic framework of northeast Tibet, has remained stable since ~8 Ma."--Leaves v-vii.
Book Synopsis Geological Evolution of Central Asian Basins and the Western Tien Shan Range by : Marie-Franc̦oise Brunet
Download or read book Geological Evolution of Central Asian Basins and the Western Tien Shan Range written by Marie-Franc̦oise Brunet and published by Geological Society of London. This book was released on 2017-10-10 with total page 605 pages. Available in PDF, EPUB and Kindle. Book excerpt: The geological evolution of Central Asia commenced with the formation of a complex Precambrian–Palaeozoic orogen. Cimmerian blocks were then accreted to the southern margin in the Mesozoic, leading to tectonic reactivation of older structures and discrete episodes of basin formation. The Indian and Arabian blocks collided with Asia in the Cenozoic, leading to renewed structural reactivation, intracontinental deformation and basin development. This complex evolution resulted in the present-day setting of an elongated Tien Shan range flanked by large Mesozoic–Cenozoic sedimentary basins with smaller intramontane basins distributed within the range. This volume presents multidisciplinary results and reviews from research groups in Europe and Central Asia that focus on the western part of the Tien Shan and some of the adjacent large sedimentary basins. These works elucidate the Late Palaeozoic–Cenozoic tectono-sedimentary evolution of the area. Emphasis is given to the collision of terranes and continents and the ensuing fault reactivations. The impact of climatic changes on sedimentation is also examined.
Book Synopsis Growth and Collapse of the Tibetan Plateau by : Richard Gloaguen
Download or read book Growth and Collapse of the Tibetan Plateau written by Richard Gloaguen and published by Geological Society of London. This book was released on 2011 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite agreement on first-order features and mechanisms, critical aspects of the origin and evolution of the Tibetan Plateau, such as the exact timing and nature of collision, the initiation of plateau uplift, and the evolution of its height and width, are disputed, untested or unknown. This book gathers papers dealing with the growth and collapse of the Tibetan Plateau. The timing, the underlying mechanisms, their interactions and the induced surface shaping, contributing to the Tibetan Plateau evolution are tightly linked via coupled and feedback processes. We present interdisciplinary contributions allowing insight into the complex interactions between lithospheric dynamics, topography building, erosion, hydrological processes and atmospheric coupling. The book is structured in four parts: early processes in the plateau formation; recent growth of the Tibetan Plateau; mechanisms of plateau growth; and plateau uplift, surface processes and the monsoon.
Book Synopsis Uplift Mechanisms and the History of the Tibetan Plateau by : Junsheng Nie
Download or read book Uplift Mechanisms and the History of the Tibetan Plateau written by Junsheng Nie and published by Geological Society of America. This book was released on 2014 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nothing provided
Book Synopsis Cenozoic Climatic and Environmental Changes in the Qaidam Basin by : Yuanyuan Sun
Download or read book Cenozoic Climatic and Environmental Changes in the Qaidam Basin written by Yuanyuan Sun and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Cenozoic Climatic and Environmental Changes in the Qaidam Basin" by Yuanyuan, Sun, 孙嫒嫒, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Large discrepancies remain regarding the timing of Cenozoic paleoclimatic and paleoenvironmental transitions in the central Asia. The first order driving force behind these changes has been intensively debated. Global climate change, the uplift of Tibetan Plateau, and the evolution of Paratethys sea have been proposed as three major candidates. To understand the evolutionary history of climate and environment of the region and controlling factors responsible for these paleoclimatic and paleoenvironmental changes, a combined study utilizing multiple proxies, including microfossils, bulk carbonate carbon and oxygen isotopes, long chain alkenones, plant n-alkane-based indices (carbon preference index, average chain length and Paq) and compound-specific carbon and hydrogen isotopes of higher plant n-alkanes, was carried out on a long, continuous and well-dated section in Dahonggou, Qaidam Basin, northern Tibetan Plateau. A parallel study was also carried out in another relatively shorter section in the Xunhua Basin, northern Tibetan Plateau. Six intervals of paleoclimatic and paleoenvironmental transitions over an interval of 35 Myr can be recognized in the studied sections, including Late Eocene-Early Oligocene gradual drying (prior to 30 Ma), Middle Oligocene aridification ( 30-26 Ma), Late Oligocene-Early Miocene wetting ( 26-21 Ma), Early Miocene drying ( 21-17 Ma), Middle Miocene climatic optimum ( 17-13 Ma), and deteriorated climate since the late Middle Miocene ( 13 Ma onwards). The reconstructed onsite C4 plant abundance including occurrence of C4 plants and their thriving and the followed decreasing, a sensitive indicator of available moisture level in the environment, agrees well with these intervals. Microfossils and long-chain alkenones suggest that a relic sea existed in the Qaidam Basin during the Middle Miocene, thus falsifying any hypothesis of significant variations in elevations of northern Tibetan Plateau prior to the Middle Miocene. The relatively stable elevations since the Eocene and before the Middle Miocene of, respectively, the central-southern part and northern part of the Plateau reveals an insignificant role of Tibetan Plateau uplift in controlling the evolution of central Asian climate and environment during the early Cenozoic. However, the Middle Miocene marine transgression and the rapid plateau-scale uplift since the late Middle Miocene probably contributed to the Middle Miocene climatic optimum and the initiated aridification afterwards in the central Asia. A comparison of proxy records in the northern Tibetan Plateau with the global benthic oxygen isotope record suggests a tight relation between the climatic/environmental transitions in the central Asia and global climatic changes. This lends support to the hypothesis that global climate, by controlling the moisture supply to the continental interior, played the dominant role in the evolution of climate and environment of central Asia during the Cenozoic time. DOI: 10.5353/th_b5223961 Subjects: Climatic changes - China - Tsaidam Basin Paleoclimatology - Cenozoic
Book Synopsis Tibetan Plateau Uplift and Environmental Impacts: New Progress and Perspectives by : Yibo Yang
Download or read book Tibetan Plateau Uplift and Environmental Impacts: New Progress and Perspectives written by Yibo Yang and published by Frontiers Media SA. This book was released on 2022-10-20 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lake Records of Environmental and Climate Change on the Tibetan Plateau by : Zhang Chengjun
Download or read book Lake Records of Environmental and Climate Change on the Tibetan Plateau written by Zhang Chengjun and published by Frontiers Media SA. This book was released on 2022-11-07 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Late Quaternary Hydrological, Paleoenvironmental and Geomorphological Processes in the Tibetan Plateau and Its Adjacent Areas by : Xiangjun Liu
Download or read book Late Quaternary Hydrological, Paleoenvironmental and Geomorphological Processes in the Tibetan Plateau and Its Adjacent Areas written by Xiangjun Liu and published by Frontiers Media SA. This book was released on 2022-02-23 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sichuan-tibet traffic corridor: Fundamental geological investigations and resource endowment by : Qiuming Pei
Download or read book Sichuan-tibet traffic corridor: Fundamental geological investigations and resource endowment written by Qiuming Pei and published by Frontiers Media SA. This book was released on 2023-06-05 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Asian Monsoon by : Peter D. Clift
Download or read book The Asian Monsoon written by Peter D. Clift and published by Cambridge University Press. This book was released on 2014-05-29 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Asian monsoon is one of the most dramatic climatic phenomena on Earth, with far-reaching environmental and societal effects. Almost two thirds of humanity lives within regions influenced by the monsoon. With the emerging Asian economies, the importance of the region to the global economy has never been more marked. The Asian Monsoon describes the evolution of the monsoon, and proposes a connection between the tectonic evolution of the solid Earth and monsoon intensity. The authors explain how the monsoon has been linked to orbital processes and thus to other parts of the global climate system, especially glaciation. Finally, they summarize how monsoon evolution since the last Ice Age has impacted human societies, as well as commenting on the potential impact of future climate change. This book presents a multi-disciplinary overview of the monsoon for advanced students and researchers in atmospheric science, climatology, oceanography, geophysics, and geomorphology.
Book Synopsis Tectonics of the Southeastern Tibetan Plateau and Its Adjacent Foreland by : B. C. Burchfiel
Download or read book Tectonics of the Southeastern Tibetan Plateau and Its Adjacent Foreland written by B. C. Burchfiel and published by Geological Society of America. This book was released on 2012-01-01 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This volume provides a summary of the geology of Eastern and Southeastern Tibet and its foreland. It covers an area of approximately 1.5 million square kilometers in 15 chapters on tectonic units that the authors recognize during 25 years of both field and laboratory study. Each chapter discusses the authors' understanding of the geology and offers interpretations of special geological relations, both local and regional, as well as currently unresolved problems of which there are many in this vast and poorly known region. Chapter 16 summarizes and interprets the preceding chapters. The volume is accompanied by CDs containing four plates: two tectonostratigraphic maps, a map of unconformities and a plate of cross sections, in both Illustrator and ArcGIS formats. This is a unique map presentation and one that the authors suggest as a model for all geological maps"--Provided by publisher.
Book Synopsis The SE Asian Gateway by : Robert Hall
Download or read book The SE Asian Gateway written by Robert Hall and published by Geological Society of London. This book was released on 2011 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collision between Australia and SE Asia began in the Early Miocene and reduced the former wide ocean between them to a complex passage which connects the Pacific and Indian Oceans. Today, the Indonesian Throughflow passes through this gateway and plays an important role in global thermohaline flow. The surrounding region contains the maximum global diversity for many marine and terrestrial organisms. Reconstruction of this geologically complex region is essential for understanding its role in oceanic and atmospheric circulation, climate impacts, and the origin of its biodiversity. The papers in this volume discuss the Palaeozoic to Cenozoic geological background to Australia and SE Asia collision. They provide the background for accounts of the modern Indonesian Throughflow and oceanographic changes since the Neogene, and consider aspects of the region's climate history--
Book Synopsis Low-Temperature Thermochronology: by : Peter W. Reiners
Download or read book Low-Temperature Thermochronology: written by Peter W. Reiners and published by Walter de Gruyter GmbH & Co KG. This book was released on 2018-12-17 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 58 of Reviews in Mineralogy and Geochemistry presents 22 chapters covering many of the important modern aspects of thermochronology. The coverage of the chapters ranges widely, including historical perspective, analytical techniques, kinetics and calibrations, modeling approaches, and interpretational methods. In general, the chapters focus on intermediate- to low-temperature thermochronometry, though some chapters cover higher temperature methods such as monazite U/Pb closure profiles, and the same theory and approaches used in low-temperature thermochronometry are generally applicable to higher temperature systems. The widely used low- to medium-temperature thermochronometric systems are reviewed in detail in these chapters, but while there are numerous chapters reviewing various aspects of the apatite (U-Th)/He system, there is no chapter singularly devoted to it, partly because of several previous reviews recently published on this topic.
Book Synopsis Investigations Into the Tectonics of the Tibetan Plateau by : B. C. Burchfiel
Download or read book Investigations Into the Tectonics of the Tibetan Plateau written by B. C. Burchfiel and published by Geological Society of America. This book was released on 2008 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This volume includes a variety of papers on the tectonics of the Tibetan Plateau and the Iranian Plateau that were presented at the first joint meeting between the Geological Society of America and the Chinese Academy of Sciences. Each paper deals with a different aspect of the geology and/or the geophysics of the tectonic evolution of the plateau. Although most of the papers discuss areas in the northeastern part of the plateau, one concentrates on the complexity of the Cenozoic shear zones in Yunnan and one focuses on the late Cenozoic extensional tectonism along the western margin of the Iranian Plateau. Several papers discuss aspects of Tibetan tectonics not covered in any other papers and arrive at unique interpretations."--Publisher's website.
Book Synopsis Detrital thermochronology by : Matthias Bernet
Download or read book Detrital thermochronology written by Matthias Bernet and published by Geological Society of America. This book was released on 2004-01-01 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
