Author: Kylie J. Matonia
Publisher:
ISBN: 9781741682717
Category : Geochronometry
Languages : en
Pages : 81

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Book Description

Author: Wolfgang Franke (géologue).)
Publisher: Geological Society of London
ISBN: 9781862390737
Category : Science
Languages : en
Pages : 474

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Book Description

Author: Paul Joseph Sylvester
Publisher:
ISBN:
Category : Analytical geochemistry
Languages : en
Pages : 280

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Book Description
Accompanying CD-ROM titled: "Short course volume 29, 2001 (to accompany Short course 40, 2008)".

Author: Peter Anthony Cawood
Publisher: Geological Society of London
ISBN: 9781862392786
Category : Science
Languages : en
Pages : 430

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Book Description
Accretionary orogens form at convergent plate boundaries and include the supra-subduction zone forearc, magmatic arc and backarc components. They can be broken into retreating and advancing types, based on their kinematic framework and resulting geological character.Accretionary systems have been active throughout Earth history, extending back until at least 3.2 Ga, and provide an important constraint on the initiation of horizontal motion of lithospheric plates on Earth. Accretionary orogens have been responsible for major growth of the continental lithosphere, through the addition of juvenile magmatic products, but are also major sites of consumption and reworking of continental crust through time.The aim of this volume is to provide a better understanding of accretionary processes and their role in the formation and evolution of the continental crust. Fourteen papers deal with general aspects of accretion and metamorphism and discuss examples of accretionary orogens and crustal growth through Earth history, from the Archaean to the Cenozoic.

Author: John M. Hanchar
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 1501509322
Category : Science
Languages : en
Pages : 520

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Book Description
Volume 53 of Reviews in Mineralogy and Geochemistry covers the most important aspects of zircon-related research over the past twenty-years and highlight possible future research avenues. The chapters review the structure of zircon and other mineral (and synthetic) phases with the zircon structure; the minor and trace element compositions of igneous, metamorphic and hydrothermal zircons; the study of melt inclusions in zircon; experimental and natural studies of zircon saturation and the use of zircon saturation thermometry for natural rocks; cation diffusion and oxygen diffusion in zircon; the historical development of zircon geochronology from the mid-1950s to the present; ID-TIMS, SIMS and ICP-MS; the application of zircon chronology in constraining sediment provenance and the calibration ofthe geologic time-scale; other isotopic systematics; the spectroscopy of zircon, both crystalline and metamict and an atlas of internal textures of zircon.

Author: Peter W. Reiners
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 1501509578
Category : Science
Languages : en
Pages : 644

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Book Description
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.

Author: N.M.W. Roberts
Publisher: Geological Society of London
ISBN: 1862393753
Category : Science
Languages : en
Pages : 356

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Book Description
The continental crust is our archive of Earth history, and the store of many natural resources; however, many key questions about its formation and evolution remain debated and unresolved: What processed are involved in the formation, differentiation and evolution of continental crust, and how have these changed throughout Earth history?How are plate tectonics, the supercontinent cycle and mantle cooling linked with crustal evolution?What are the rates of generation and destruction of the continental crust through time?How representative is the preserved geological record? A range of approaches are used to address these questions, including field-based studies, petrology and geochemistry, geophysical methods, palaeomagnetism, whole-rock and accessory-phase isotope chemistry and geochronology. Case studies range from the Eoarchaean to Phanerozoic, and cover many different cratons and orogenic belts from across the continents.

Author: Alan P. Dickin
Publisher: Cambridge University Press
ISBN: 0521823161
Category : Science
Languages : en
Pages : 510

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Book Description
New and updated edition of a popular textbook on the geological applications of radiogenic isotopes.

Author: Uwe C. Martens
Publisher: Geological Society of America
ISBN: 0813725461
Category : Science
Languages : en
Pages :

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Author: Yan Luo
Publisher:
ISBN: 9781361438718
Category :
Languages : en
Pages :

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Book Description
This dissertation, "U-Pb Age and Hf Isotopic Study of Detrital Zircons From the Liaohe Group: Constraints on the Evolution of the Jiao-Liao-Ji Belt, North China Craton" by Yan, Luo, 羅彥, 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: Abstract of thesis entitled U-Pb AGE AND Hf ISOTOPIC STUDY OF DETRITAL ZIRCONS FROM THE LIAOHE GROUP: CONSTRAINTS ON THE EVOLUTION OF THE JIAO-LIAO- JI BELT, NORTH CHINA CRATON Submitted by Luo Yan for the degree of Doctor of Philosophy at The University of Hong Kong in December 2005 The North China Craton (NCC) is the largest and oldest known continental block in China. The Jiao-Liao-Ji mobile belt along the eastern margin of the NCC is one of the rarely preserved Paleoproterozoic integrities in the world. As an important Paleoproterozoic sedimentary sequence of this belt, the Liaohe Group consists of an assemblage that includes a lower arkose- and volcanic-rich sequence (Langzishan, Li'eryu /Gaojiayu Formations), through a middle carbonate-rich sequence (Dashiqiao Formation) to an upper argillaceous sequence (Gaixian Formation). Traditionally, this group was subdivided into the North and South Liaohe Groups. Associated with the Liaohe Group are large volumes of granitoid rocks (Liaoji Granite), whose emplacement age has been dated at 2.1-2.2 Ga. Regionally, the Liaohe Group and the associated Liaoji Granite extend along a NEE-trending belt that is flanked by 2.45-2.55 Ga basement gneisses. Because of the lack of knowledge about the timing of deposition and metamorphism, nature of the sedimentary provenance and the basement, controversy exists on several issues including the depositional environment and tectonic significance of these rocks. The present work aims to constrain key issues by studying U-Pb, Hf isotopic and trace elemental compositions of detrital zircons from the Liaohe Group. Modern analytical technology such as cathodoluminescence (CL) imaging, laser ablation inductively coupled plasma mass spectrometry and laser ablation multiple collector inductively coupled plasma mass spectrometry were employed. CL images reveal that most detrital zircon grains from the Liaohe Group are characterized by concentric oscillatory zoning, suggesting magmatic origin. However, a small number of zircon grains have structureless recrystallization rims, indicating metamorphic origin. Results of this study show that the zoned zircon grains of the Langzishan Formation, the lowest sequence of the Liaohe Group, have concordant U-Pb ages ranging from 2.24-2.05 Ga, suggesting that the minimum depositional time of the Liaohe Group is at 0.2815 and 0.2813), similar Hf model ages (T, peaks at 2.66 Ga 2.75 DM Ga, and 2.8 3.0 Ga) and similar εHf values ( -5 +9 and -7 +5). Data of this study suggest that the metasedimentary rocks of the Liaohe Group were deposited between 2.05 and 1.93 Ga, a short time after emplacement of the Liaoji Granite. The provenance of the Langzishan, Li'eryu and Gaixian Formations, is particularly dominated by the Liaoji Granite. Furthermore, the protoliths of the North and South groups may have formed simultaneously and could have developed on a single late Archean basement rather than two different blocks. This