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Non-volcanic Rifting of Continental Margins: a comparison of evidence ..

Product Code: SP187
Series:
Author/Editor: Edited by R C L Wilson (The Open University, UK), R B Whitmarsh (Southampton University, UK), B Taylor (University of Hawaii, USA) & N Froitzheim (University of Bonn, Germany)
Publication Date: 20 December 2001
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Description

Non-volcanic continental margins may form up to 30% of all present-day passive margins, and remnants of them are preserved in mountain belts. The papers in this volume demonstrate the benefits of integrating offshore and onshore studies, and illustrate the range of information obtained at different scales when comparing evidence from land and sea. Data sets collected across a range of spatial scales are evaluated: thin sections, cores, outcrops, seismic reflection profiles, and other geophysical data. The outcrop scale is crucial because it enables the spatial gulf to be bridged between DSDP and ODP cores and marine seismic data. There is also the problem that basins on land and beneath the sea inevitably have had different post-rift histories resulting in their contrasting present-day elevation. In mountain belts, portions of continental margins and oceanic crust are superbly exposed, but dismembered by subsequent compressional tectonics. Of present-day passive margins, extensional features have only been slightly deformed, if at all, by compressional movements, but are buried beneath significant thicknesses of post-rift sediments and so can only be sampled by ocean drilling at a small number of points.

The first paper reviews the synergies that have occurred between investigations of the eastern North Atlantic non-volcanic margins and remnants of similar Mesozoic margins preserved in the Alps, and some later papers return to this theme. However, papers describing margins from other parts of the world show that it may be premature to use models based on the Atlantic and the Alps as the paradigm for all non-volcanic margins. The following 25 papers in the book are grouped under the following headings: (1) Margin overviews; (2) Exhumed crust and mantle; (3) Tectonics and stratigraphy; and (4) Numerical models of extension and magmatism.

Readership: Geologists, geophysicists, geochemists, oceanographers, petroleum explorationists.

Type: Book
Ten Digit ISBN: 1-86239-091-6
Thirteen Digit ISBN: 978-1-86239-091-1
Publisher: GSL
Binding: Hardback
Pages: 586
Weight: 1.50 kg

Contents

Non-volcanic rifted margins, continental break-up and the onset of seafloor spreading: some outstanding questions • Propagation of continental break-up in the south-western South China Sea • Nature of the continent-ocean transition on the non-volcanic rifted margin of the central Great Australian Bight • Development of the continental margins of the Labrador Sea – a review • The role of syn-rift magmatism in the rift-to-drift evolution of the west Iberia continental margin: geophysical observations • Subsidence, deformation, and thermal and mechanical evolution of the Mesozoic south-alpine rifted margin: an analogue for Atlantic-type margins • Petrochemistry of serpentinized peridotite from the Iberia Abyssal Plain (ODP Leg 173): its character intermediate between sub-oceanic and sub-continental upper mantle • Petrology and geochemistry of exhumed peridotites and gabbros at non-volcanic margins: ODP Leg 173 west Iberia ocean-continent transition zone • The evolution of amphibolites from Site 1067, ODP Leg 173 (Iberia Abyssal Plain): Jurassic rifting to the Pyrenean collision; Palaeomagnetic and rock magnetic results from serpentized peridotites beneath the Iberia Abyssal Plain • The Steinmann Trinity revisited: mantle exhumation and magmatism along an ocean-continent transition: the Platta nappe, eastern Switzerland • The role of lower crust and continental upper mantle during formation of non-volcanic passive continental margins: evidence from the Alps • A tale of two kinds of normal fault: the importance of strain weakening in fault development • Evidence for seismogenic normal faults at shallow dips in continental rifts • Deformation fabrics of faulted rocks, and some syntectonic stress estimates from active Woodlark Basin detachment zone (ODP Leg 180); Evolution of Miocene-Recent Woodlark Rift Basin, SW Pacific, inferred from sediments drilled during OLP Leg 180 • 40Ar/39Ar ages of fallout tephra layers and volcaniclastic deposits in the sedimentary succession of western Woodlark Basin, Papua New Guinea: the marine record of Miocene-Pleistocene volcanism • Micropalaeontological and palaeomagnetic approaches to stratigraphic anomalies in rift basins: ODP site 1109, Woodlark Basin • The role of detachment faulting in the formation of an ocean-continent transition: insights from the Iberia Abyssal Plain • Rifting along non-volcanic passive margins: stratigraphic and seismic evidence from the Mesozoic successions of the Alps and western Iberia • Tectonic evolution of the north-western Red Sea – Gulf of the Suez rift system • Transfer zones normal and oblique to rift trend: examples from the Perth Basin, western Australia • Patterns of extension and magmatism along the continent-ocean boundary, South China margin • Geodynamic models of continental extension and the formation of non-volcanic rifted continental margins • Anomalous melt production after continental break-up in the southern Iberia Abyssal Plain • Serpentinization and magmatism during extension at non-volcanic margins - the effect of initial lithospheric structure • Index. Principal authors: G Boillot, Geosciences Azur, France. P Huchon, Ecole Normale superieure & CNRS, France. J Sayers, Australian Geological Survey Organisation, Australia. J A Chalmers, Geological Survey of Denmark & Greenland, Denmark. R B Whitmarsh, Southampton Oceanography Centre, UK. G Bertotti, Vrije Universiteit, Netherlands. A B E Natsue, Tokyo Institute of Technology, Japan. R Hebert, Universite Laval, Canada. V Gardien, CNRS & UCB, France. X Zhao, University of California, USA. L Desmurs, ETH-Zentrum, Switzerland. O Muntener, ETH-Zurich, Switzerland. W R Buck, Lamont-Doherty Earth Observatory of Colombia University, USA. G A Abers, Boston University, USA. S Roller, Universitat Freiburg, Germany. A H F Robertson, University of Edinburgh, UK. K S Lackschewitz, Universitat Bremen, Germany. J M Resig, University of Hawaii, USA. G Manatscahl, Universite Louis Pasteur, France. R C L Wilson, The Open University, UK. S M Khalil, Royal Holoway University of London, UK. T Song, Curtin University, Australia. P D Clift, Woods Hole Oceanographic Insitution, USA. J C Bowling, University of Alabama, USA. T A Minshull, University of Southampton, UK. M Perez-Guissinye, Geomar FZ, Germany.

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