January 25, 2021

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Ultrahigh-Pressure Metamorphism

Ultrahigh-Pressure Metamorphism
Author : Larissa Dobrzhinetskaya,Shah Wali Faryad,Simon Wallis,Simon Cuthbert
Publisher : Elsevier
Release Date : 2011-03-15
Category : Science
Total pages :696
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Ultrahigh Pressure Metamorphism (UHPM) is a fast growing discipline that was established 25 years ago after discoveries of high pressure minerals, coesite and diamonds. The current explosion of research on UHMP terranes reflects their significance for understanding large scale mantle dynamics, major elements of plate tectonics such as continental collisions, deep subduction and exhumation, mountains building, geochemical recycling 'from surface to the core', and a deep storage of light elements participating in green-house effects in the atmosphere. This book provides insights into the formation of diamond and coesite at very high pressures and explores new ideas regarding the tectonic setting of this style of metamorphism. Important, authoritative and comprehensive one-stop resource for the growing ultrahigh pressure metamorphism UHPM research community A forward-looking approach founded upon a detailed historical perspective on UHPM presents the trends in discovery, methodology and theory over the last 25 years, allowing readers to gain a clear understanding of the current trends and the approaches that will shape the science in the future A highly diverse set of articles, covering a wide range of methods and sub-disciplines

Ultrahigh Pressure Metamorphism

Ultrahigh Pressure Metamorphism
Author : Dennis A. Carswell,Roberto Compagnoni,Franco Rolfo
Publisher : The Mineralogical Society of Great Britain and Ireland
Release Date : 2003-01-01
Category : Science
Total pages :508
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Ultrahigh-pressure Metamorphism

Ultrahigh-pressure Metamorphism
Author : Bradley R. Hacker,William C. McClelland,J. G. Liou,Geological Society of America
Publisher : Geological Society of America
Release Date : 2006
Category : Science
Total pages :206
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Petrology of ultrahigh-pressure metamorphic rocks from Pohorje Mountains

Petrology of ultrahigh-pressure metamorphic rocks from Pohorje Mountains
Author : Mirijam Vrabec,Tadej Dolenec
Publisher : Unknown
Release Date : 2007
Category :
Total pages :268
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Ultrahigh-pressure metamorphism has been recorded in Eo-Alpine eclogites and garnet peridotites from the Pohorje Mts., Slovenia, belonging to the Eastern Alps. Eclogite bodies are hosted in continental crustal rocks, and are closely associated with meta- ultrabasic rocks, predominantly serpentinized dunites and harzburgites with garnet peridotite remnants. The eclogites contain a peak metamorphic assemblage of garnet, omphacite, kyanite and phengite. Pyrope-rich garnet is unzoned and almost free of inclusions. The non-stoichiometric supersilicic omphacites contain up to 5 mol% of Ca- Eskola molecule. Such clinopyroxenes are known to be stable exclusively at high- pressure conditions exceeding 3.o GPa. Their breakdown during decompression resulted in exsolution of quartz rods and needles that are oriented parallel to omphacite c-axis. Phengite contains up to 3.5 Si pfu. Polycrystalline quartz inclusions in primary minerals are surrounded by radial fractures and often exhibit microtextures diagnostic of the former presence of coesite. The absence of coesite is a consequence of near-isothermal decompression during the first stages of exhumation. Eclogites are rich in Mg0 and have Ca0and A1203 contents consistent with mafic magmatic rocks. They are more depleted than MORB with positive Sr and Pb anomalies, and with Cs, Rb, Ba enrichments. Precursor rocks were plagioclase-bearing (gabbroic) cumulates from depleted mantle- derived melts, which most probably formed in the Permiantime. Garnet peridotites show signs of a complex four-stage metamorphic history. The protolith stage is represented by a low-P high-T assemblage of olivine + Al-rich orthopyroxene + Al-rich clinopyroxene + Cr-spinel. Due to metamorphism, primary clinopyroxene shows exsolutions of garnet, orthopyroxene, amphibole, Cr-spinel and ilmenite. The UHP metamorphicstage is defined by the assemblage garnet + olivine + Al-poor orthopyroxene + clinopyroxene + Cr-spinel. Subsequent decompression and final retrogression stage resulted in formation of kelyphitic rims around garnet and crystallization of tremolite, chlorite, serpentine and talc. The garnet peridotites are relatively rich in A1203, Ca0 and Sr compared to primitive mantle, where as REE commonly show depleted patterns with positive Eu anomalies. Most probably garnet peridotites represent depleted mantle rocks that became refertilized within the plagioclase stability field before tectonic incorporation in the subducting continental slab, or, alternatively, they might carry the signature of metasomatism by melts derived from a plagioclase-bearing source, possibly even the eclogites. P-T estimates for eclogites and garnet peridotites indicate that the peak of metamorphism reached over 3 GPa and 800 °C in the eclogites and close to 4 GPa and 900 °C in the garnet peridotites, well within the UHP stability field. Eclogites and garnet peridotites did not share the same P-T path until the incorporation of peridotite from the mantle wedge into the subducting crust. The, rocks of the Pohorje Mts. record the highest-pressure conditions of all Eo-Alpine metamorphism in the Alps. Petrographic and geochemical evidence shows that these conditions were reached during deep subduction (at least 100 km) of continental slab. The southward increase inpeak pressure from approximately 2 GPa in the Koralpe and Saualpe to 3 or 4 GPa in the Pohorje suggests the south to south-eastern dip of the Cretaceous intra-Alpine subduction zone. Ultrahigh-pressure rocks of Pohorje were probably exhumed by ,slab extraction", that is, the downward removal of the mantle and lower crustal wedge overlying the subducted rocks.

Earth as an Evolving Planetary System

Earth as an Evolving Planetary System
Author : Kent C. Condie
Publisher : Academic Press
Release Date : 2011-08-22
Category : Science
Total pages :578
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Earth as an Evolving Planetary System, Second Edition, examines the various subsystems that play a role in the evolution of the Earth. These subsystems include such components as the crust, mantle, core, atmosphere, oceans, and life. The book contains 10 chapters that discuss the structure of the Earth and plate tectonics; the origin and evolution of the crust; the processes that leave tectonic imprints in rocks and modern processes responsible for these imprints; and the structure of the mantle and the core. The book also covers the Earth’s atmosphere, hydrosphere, and biosphere; crustal and mantle evolution; the supercontinent cycle; great events in Earth history; and the Earth in comparison to other planets. This book is meant for advanced undergraduate and graduate students in Earth Sciences, with a basic knowledge of geology, biology, chemistry, and physics. It also may serve as a reference tool for specialists in the geologic sciences who want to keep abreast of scientific advances in this field. Kent Condie's corresponding interactive CD, Plate Tectonics and How the Earth Works, can be purchased from Tasa Graphic Arts here: http://www.tasagraphicarts.com/progptearth.html Two new chapters on the Supercontinent Cycle and on Great Events in Earth history New and updated sections on Earth's thermal history, planetary volcanism, planetary crusts, the onset of plate tectonics, changing composition of the oceans and atmosphere, and paleoclimatic regimes Also new in this Second Edition: the lower mantle and the role of the post-perovskite transition, the role of water in the mantle, new tomographic data tracking plume tails into the deep mantle, Euxinia in Proterozoic oceans, The Hadean, A crustal age gap at 2.4-2.2 Ga, and continental growth

Ultrahigh-pressure Metamorphism and Metasomatism in Mafic-ultramafic Rocks from Eastern China

Ultrahigh-pressure Metamorphism and Metasomatism in Mafic-ultramafic Rocks from Eastern China
Author : Nadia Malaspina
Publisher : Unknown
Release Date : 2006
Category :
Total pages :129
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Ultrahigh Pressure Mineralogy

Ultrahigh Pressure Mineralogy
Author : Russell J. Hemley
Publisher : Walter de Gruyter GmbH & Co KG
Release Date : 2018-12-17
Category : Science
Total pages :691
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Volume 37 of Reviews in Mineralogy, divided into three sections, begins with an overview (Chapter 1) of the remarkable advances in the ability to subject minerals-not only as pristine single-crystal samples but also complex, natural mineral assemblages-to extreme pressure-temperature conditions in the laboratory. These advances parallel the development of an arsenal of analytical methods for measuring mineral behavior under those conditions. This sets the stage for section two (Chapters 2-8) which focuses on high-pressure minerals in their geological setting as a function of depth. This top-down approach begins with what we know from direct sampling of high-pressure minerals and rocks brought to the surface to detailed geophysical observations of the vast interior. The third section (Chapters 9-19) presents the material fundamentals, starting from properties of a chemical nature, such as crystal chemistry, thermochemistry, element partitioning, and melting, and moving toward the domain of mineral physics such as melt properties, equations of state, elasticity, rheology, vibrational dynamics, bonding, electronic structure, and magnetism. The Review thus moves from the complexity of rocks to their mineral components and finally to fundamental properties arising directly from the play of electrons and nuclei. This volume was prepared for a short course by the same title, organized by Russell J. Hemley and Ho-kwang Mao and sponsored by the Mineralogical Society of America, December 4-6, 1998 on the campus of the University of California at Davis.

When Continents Collide: Geodynamics and Geochemistry of Ultrahigh-Pressure Rocks

When Continents Collide: Geodynamics and Geochemistry of Ultrahigh-Pressure Rocks
Author : Bradley Hacker,J.G. Liou
Publisher : Springer Science & Business Media
Release Date : 2013-11-11
Category : Science
Total pages :325
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2Gpa has increased to more than 15. This indicates that subduction of continental fragments to depths of 100-150 km may have played a significant role in the formation of mountain belts. This volume brings together the geochemical, geophysical and geodynamical approaches to study the processes active during ultrahigh-pressure (UHP) tectonics. The collection of papers demarkates the frontier of our understanding of the creation, preservation, and exhumation of ultrahigh-pressure rocks. Audience: This volume will be of interest to any earth scientist interested in ultrahigh pressure processes and the formation and modification of continental crust.

Proterozoic Orogens of India

Proterozoic Orogens of India
Author : T.R.K. Chetty
Publisher : Elsevier
Release Date : 2017-07-12
Category : Science
Total pages :426
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Proterozoic Orogens of India: A Critical Window to Gondwana provides a unique opportunity to understand a cross-section of the well-exposed and best-studied part of Earth’s crust and the processes of continental collision. It covers pulses of reworking processes and their impact on magmatism, metamorphism and deformational history of Proterozoic orogens vis-à-vis the supercontinental formation. The details of structural architecture, crustal blocks, shear zone systems, magmatism, metamorphism, geochemical and isotopic signatures, mineralization and tectonic models of all the Proterozoic orogens of India are discussed along with excellent illustrations reflecting the field-based, multi-scale structural and geological data sets. The spatial distribution, geometry, kinematics and transpressional strain of the shear zone systems (mostly suture zones), which are critical to all conceptual models dealing with tectono-metamorphic history of Proterozoic orogens of India, are also covered. The book summarizes and integrates the state-of -the art understanding of the structural architecture, lithological assemblages, petrological, geochemical, geochronological and geophysical aspects of the Proterozoic orogens of India. Includes a much needed state-of-the-art tectonic summary of the voluminous data that has emerged from the Protrozoic orogens of India in the last 2-3 decades Authored by a well-established expert with more than 30 years of experience in the field based, multi-scale structural geological studies of the ancient orogens of India Covers up-to-date reviews and models of Proterozoic orogens developed in the Indian shield over the past 2.5 billion years of Earth history

Ultrahigh-pressure Metamorphism and Geodynamics in Collision-type Orogenic Belts

Ultrahigh-pressure Metamorphism and Geodynamics in Collision-type Orogenic Belts
Author : Wallace Gary Ernst,J. G. Liou
Publisher : Geological Society of America
Release Date : 2000-01-01
Category : Science
Total pages :293
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Ultrahigh-pressure Metamorphism

Ultrahigh-pressure Metamorphism
Author : Bradley R. Hacker,William C. McClelland,J. G. Liou,Geological Society of America
Publisher : Geological Society of America
Release Date : 2006
Category : Science
Total pages :206
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Ultrahigh-Pressure Metamorphic Rocks in the Dabieshan-Sulu Region of China

Ultrahigh-Pressure Metamorphic Rocks in the Dabieshan-Sulu Region of China
Author : Po-lin Tsʻung
Publisher : Springer
Release Date : 1996
Category : Science
Total pages :224
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Recent discoveries of diamond and coesite in the ultrahigh- pressure (UHP) metamorphosed supracrustal rocks have provoked a new challenge to present-day geodynamic ideas. A worldwide shift towards a new paradigm on the Earth's dynamics is imminent. Facing the new challenge, Chinese geologists have been taking an active role. The Dabieshan-Sulu region, the largest and best exposed UHP belt in the world, has attracted international attention. This comprehensive book describes many aspects of the UHP rocks in the Dabieshan-Sulu region, including the geotectonic setting, mode of occurrence, mineralogy and petrology, isotope chronology, major and trace element chemistry, and metamorphic PTt path. The possible geodynamic mechanisms involved in the deep subduction and rapid exhumation of UHP rocks are also discussed. This book will be of particular interest to researchers and graduate students of metamorphic petrology and global tectonics.

HP-UHP Metamorphism and Tectonic Evolution of Orogenic Belts

HP-UHP Metamorphism and Tectonic Evolution of Orogenic Belts
Author : Lifei Zhang,Zeming Zhang,Hans-Peter Schertl,Chunjing Wei
Publisher : Unknown
Release Date : 2019-04
Category : Geology, Structural
Total pages :362
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"High pressure (HP) and ultrahigh pressure (UHP) metamorphic rocks play a key role in understanding the tectonic evolution of orogenic belts. They have typically experienced complex changes during subduction and exhumation processes arising from recrystallization, deformation, fluid-rock interactions and even partial melting, and may therefore carry valuable records of evolving geodynamic systems in an orogenic belt. This special publication addresses the current work on HP-UHP metamorphism and its relation to the tectonic evolution of orogenic belts. This special publication contains fifteen papers covering the important orogenic belts of the Himalaya, Dabie-Sulu, Tian Shan, North Qaidam and others that have been grouped into three parts: (I) new developments in the determination of metamorphic pressure-temperature (PT) conditions and their timing, (II) overview papers of well-known HP-UHP metamorphic belts and (III) research papers for some newly discovered HP-UHP belts.

Ultrahigh Pressure Metamorphism

Ultrahigh Pressure Metamorphism
Author : Dennis A. Carswell,Roberto Compagnoli,Franco Rolfo
Publisher : The Mineralogical Society of Great Britain and Ireland
Release Date : 2003
Category : Science
Total pages :508
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The high-pressure and ultra-high-pressure metamorphic belt in the East Qinling and Dabie mountains, China

The high-pressure and ultra-high-pressure metamorphic belt in the East Qinling and Dabie mountains, China
Author : Zhendong You
Publisher : Unknown
Release Date : 1996
Category : Science
Total pages :150
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