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Author:
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Languages : en
Pages : 245
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 245
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Book Description
Author:
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Category :
Languages : en
Pages :
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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.
Author: T.J. Wright
Publisher: Geological Society of London
ISBN: 1862397295
Category : Science
Languages : en
Pages : 373
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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.
Author: Bryan C. Storey
Publisher:
ISBN: 9781786200419
Category : Continental margins
Languages : en
Pages : 404
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Book Description
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.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309041880
Category : Science
Languages : en
Pages : 296
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Book Description
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.
Author: G. Yirgu
Publisher: Geological Society of London
ISBN: 9781862391963
Category : Nature
Languages : en
Pages : 344
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Book Description
The seismically and volcanically active East African Rift System is an ideal laboratory for continental break-up processes: it encompasses all stages of rift development. Its northernmost sectors within the Afar volcanic province include failed rifts, nascent sea-floor spreading, and youthful passive continental margins associated with one or more mantle plumes. A number of models have been proposed to explain the success and failure of continental rift zones, but there remains no consensus on how strain localizes to achieve rupture of initially 125-250 km-thick plates, or on the interaction between the plates and asthenospheric processes. This collection of papers provides new structural, stratigraphic, geochemical and geophysical data and numerical models needed to resolve fundamental questions concerning continental break-up and mantle plume processes. The focus is on how mantle melt intrudes and is distributed through the plate, and how this magma intrusion process controls along-axis segmentation and facilitates break-up.
Author: Garry D. Karner
Publisher: Geological Society of London
ISBN: 9781862392281
Category : Science
Languages : en
Pages : 504
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Book Description
This volume summarises our present understanding of the formation of passive continental margins and their ocean-continent transitions. It outlines the geological, geophysical and petrological observations that characterize extensional systems, and how such observations can guide and constrain dynamic and kinematic models of continental lithosphere extension, breakup and the inception of organized sea-floor spreading.
Author: Manik Talwani
Publisher: American Geophysical Union
ISBN:
Category : Science
Languages : en
Pages : 496
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Book Description
Proceedings of a symposium held in honor of Maurice Ewing at Arden House, Harriman, N.Y. on March 28-31, 1976.
Author: Mattia Pistone
Publisher: Frontiers Media SA
ISBN: 2889637778
Category :
Languages : en
Pages : 207
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Book Description
Author: Martin A. Menzies
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 508
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Book Description
