Role Of Magmatism In Continental Lithosphere Extension
DOWNLOAD
Download Role Of Magmatism In Continental Lithosphere Extension PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Role Of Magmatism In Continental Lithosphere Extension book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Role Of Magmatism In Continental Lithosphere Extension
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2008
Role Of Magmatism In Continental Lithosphere Extension written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
The dynamics and evolution of rifts and continental rifted margins have been the subject of intense study and debate for many years and still remain the focus of active investigation. The 2006 AGU Fall Meeting session 'Extensional Processes Leading to the Formation of Basins and Rifted Margins, From Volcanic to Magma-Limited' included several contributions that illustrated recent advances in our understanding of rifting processes, from the early stages of extension to breakup and incipient seafloor spreading. Following this session, we aimed to assemble a multi-disciplinary collection of papers focussing on the architecture, formation and evolution of continental rift zones and rifted margins. This Tectonophysics Special Issue 'Role of magmatism in continental lithosphere extension' comprises 14 papers that present some of the recent insights on rift and rifted margins dynamics, emphasising the role of magmatism in extensional processes. The purpose of this contribution is to introduce these papers.
Role Of Magmatism In Continental Lithosphere Extension
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2009
Role Of Magmatism In Continental Lithosphere Extension written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Magmatism And The Causes Of Continental Break Up
DOWNLOAD
Author : Bryan C. Storey
language : en
Publisher:
Release Date : 1992
Magmatism And The Causes Of Continental Break Up written by Bryan C. Storey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Continental margins categories.
The association between lithospheric extension, continental break-up, mantle plumes and massive bursts of igneous activity is well recognised, but their causal relationship remains controversial. The main aim of this volume is to integrate relevant tectonic, geochemical and geophysical data which will lead to a better understanding of the causal relationships between magmatism and continental break-up. The first section is concerned mainly with models of magma generation and breakup processes. The remaining sections present examples from the geological record.
Magmatic Rifting And Active Volcanism
DOWNLOAD
Author : T.J. Wright
language : en
Publisher: Geological Society of London
Release Date : 2016-09-06
Magmatic Rifting And Active Volcanism written by T.J. Wright and has been published by Geological Society of London this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-09-06 with Science categories.
A major rifting episode began in the Afar region of northern Ethiopia in September 2005. Over a ten-day period, c. 2.5 km3 of magma were intruded along a 60 km-long dyke separating the Arabian and Nubian plates. Over the next five years, a further 13 dyke intrusions caused continued extension, eruptions and seismicity. This activity led to a renewed international focus on the role of magmatism in rifting, with major international collaborative projects working in Afar and Ethiopia to study the ongoing activity and to place it in a broader context. This book brings together articles that explore the role of magmatism in rifting, from the initiation of continental break-up through to full seafloor spreading. We also explore the hazards related to rifting and the associated volcanism. This work has implications for our understanding of how continents break-up and the associated distribution of resources in rift basins and continental margins.
Margins
DOWNLOAD
Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 1990-02-01
Margins written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990-02-01 with Science categories.
Approximately 70 percent of the world's population is concentrated in the coastal borderlands, which geologists recognize to be the present continental margins. This new book on these continental margins provides a detailed account of a meeting which brought together specialists in marine and terrestrial geology, geochemistry, and geophysics. The workshop garnered widespread support and enthusiasm for a new direction in margins research focused on interdisciplinary studies of the fundamental processes of continental margin evolution. Scientific problems and solutions were identified for both divergent and convergent margins. Results of the workshop show that many of the fundamental plate interaction processes are common to all margins, whether formed by extension, contraction, or translation. This conclusion suggests a unified approach to margins research. A margins initiative has been proposed to follow up on the workshop results by developing science programs aimed at understanding the processes that control the initiation and evolution of continental margins.
Architecture And Evolution Of The Crust During Continental Arc Magmatism
DOWNLOAD
Author : Glenn J. Woodsworth
language : en
Publisher: Geological Society of America
Release Date : 2020-07-06
Architecture And Evolution Of The Crust During Continental Arc Magmatism written by Glenn J. Woodsworth and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-07-06 with Science categories.
Magmatism And Geodynamics
DOWNLOAD
Author : O A Bagatikov
language : en
Publisher: CRC Press
Release Date : 2020-07-16
Magmatism And Geodynamics written by O A Bagatikov and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-07-16 with Science categories.
Magnatism is the only true endogenic process for generating new material on the Earth's surface. Obviously, magmatism and tectonic movements are reflections of geodynamics, that is, physical processes which occur in deep-seated environments. What are the interrelationships between magmatism and tectronics? How did the character of terrestrial magmatism change through time and are there any irregularities in this process?
Andean Magmatism
DOWNLOAD
Author : HARMON/BARREIRO
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Andean Magmatism written by HARMON/BARREIRO and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Destructive plate margin magmagenesis is one of the most intensely studied and widely debated topics in the earth sciences at present. Calc-alkaline volcanic and plutonic rocks in orogenic settings exhibit such a diversity of composition and character that the subducted oceanic lithosphere, the overlying 'enriched' lithospheric mantle and the lower continental crust all have been advocated recently as the primary source region for island-arc and continental-margin basaltic to andesitic magmas. The role of the upper continental crust is also a matter of continuing controversy. It is clear that crustal contamination is a common, but not universal, feature of destructive plate margin magmatism. Whether this contamination is introduced at source by subduction-related processes or occurs during magma transit by bulk anatexis and magma mixing, selective contamination or coupled fractional crystallization-assimilation mechanisms is central to most current discussions of andesite petrogenesis. This book presents a series of papers which directly address these and other important geological and geochemical problems within the context of the Mesozoic-Cenozoic calc-alkaline magmatism characteristic of the Andean Cordillera of western South America. Although it is aimed primarily at postgraduate students and researchers familiar with the Andes, it is also a useful general reference for workers in other fields who wish to gain an insight into current thoughts, ideas and speculations on 'andesitic' magmatism at destructive plate margins.
Regional Uplift Associated With Continental Large Igneous Provinces
DOWNLOAD
Author : A. D. Saunders
language : en
Publisher:
Release Date : 2007
Regional Uplift Associated With Continental Large Igneous Provinces written by A. D. Saunders and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Geology categories.
The timing and duration of surface uplift associated with large igneous provinces provide important constraints on mantle convection processes. Here we review geological indicators of surface uplift associated with five continent-based magmatic provinces: Emeishan Traps (260 million years ago: Ma), Siberian Traps (251 Ma), Deccan Traps (65 Ma), North Atlantic (Phase 1, 61 Ma and Phase 2, 55 Ma), and Yellowstone (16 Ma to recent). All five magmatic provinces were associated with surface uplift. Surface uplift can be measured directly from sedimentary indicators of sea-level in the North Atlantic and from geomorpholocial indicators of relative uplift and tilting in Yellowstone. In the other provinces, surface uplift is inferred from the record of erosion. In the Deccan, North Atlantic and Emeishan provinces, transient uplift that results from variations in thermal structure of the lithosphere and underlying mantle can be distinguished from permanent uplift that results from the extraction and emplacement of magma. Transient surface uplift is more useful in constraining mantle convection since models of melt generation and emplacement are not required for its interpretation. Observations of the spatial and temporal relationships between surface uplift, rifting and magmatism are also important in constraining models of LIP formation. Onset of surface uplift preceded magmatism in all five of the provinces. Biostratigraphic constraints on timing of uplift and erosion are best for the North Atlantic and Emeishan Provinces, where the time interval between significant uplift and first magmatism is less than 1 million years and 2.5 million years respectively. Rifting post-dates the earliest magmatism in the case of the North Atlantic Phase 1 and possibly in the case of Siberia. The relative age of onset of offshore rifting is not well constrained for the Deccan and the importance of rifting in controlling magmatism is disputed in the Emeishan and Yellowstone Provinces. In these examples, rifting is not a requirement for onset of LIP magmatism but melting rates are significantly increased when rifting occurs. Models that attempt to explain emplacement of these five LIPs without hot mantle supplied by mantle plumes often have difficulties in explaining the observations of surface uplift, rifting and magmatism. For example, small-scale convection related to craton or rift boundaries (edge-driven convection) cannot easily explain widespread (1000 km scale) transient surface uplift (Emeishan, Deccan, North Atlantic), and upper mantle convection initiated by differential incubation beneath cratons (the hotcell model) is at odds with rapid onset of surface uplift (Emeishan, North Atlantic). The start-up plume concept is still the most parsimonious way of explaining the observations presented here. However, observations of surface uplift cannot directly constrain the depth of origin of the hot mantle in a plume head. The short time interval between onset of transient surface uplift and magmatism in the North Atlantic and Emeishan means that the associated starting plume heads were probably not large ( 1000 km diameter) roughly spherical diapirs and are likely to have formed narrow ( 100 km radius) upwelling jets, with hot mantle then spreading rapidly outward within the asthenosphere. In cases where rifting post-dates magmatism (N Atlantic Phase 1) or where the degree of lithospheric extension may not have been great (Siberia), a secondary mechanism of lithospheric thinning, such as gravitational instability or delamination of the lower lithosphere, may be required to allow hot mantle to decompress sufficiently to explain the observed volume of magma with a shallow melting geochemical signature. Any such additional thinning mechanisms are probably a direct consequence of plume head emplacement. -Abstract.
Magmatism And The Causes Of Continental Break Up
DOWNLOAD
Author : Bryan C. Storey
language : en
Publisher: Geological Society of America
Release Date : 1992
Magmatism And The Causes Of Continental Break Up written by Bryan C. Storey and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Science categories.