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Channel Flow, Ductile Extrusion and Exhumation in Continental Collision Zones

Product Code: SP268
Series: GSL Special Publications
Author/Editor: Edited by R D Law, M P Searle and L Godin
Publication Date: 07 December 2006
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Description

This collection of 27 review and research papers provides an overview of the geodynamic concepts of channel flow and ductile extrusion in continental collision zones. The focal point for this volume is the proposal that the middle or lower crust acts as a ductile, partially molten channel flowing out from beneath areas of over-thickened crust, such as the Tibetan plateau, towards the topographic surface at plateau margins. This controversial proposal explains many features related to the geodynamic evolution of the plateau and, for example, extrusion and exhumation of the crystalline core of the Himalayan mountain chain to the south.  In this volume thermal–mechanical models for channel flow, extrusion and exhumation are presented, and geological and geophysical evidence both for and against the applicability of such models to the Himalayan–Tibetan Plateau system, as well as older continental collision zones such as the Hellenides, the Appalachians and the Canadian Cordillera, are discussed.

 

Type: Book
Ten Digit ISBN: 1-86239-209-9
Thirteen Digit ISBN: 978-1-86239-209-0
Publisher: GSL
Binding: Hardback
Pages: 632
Weight: 1.60 kg

Contents

Memorial for Doug Nelson, S L Klemperer
• Channel flow, extrusion and exhumation in continental collision zones: an introduction, L Godin, D Grujic, R D Law and M P Searle
• Channel flow and continental collision tectonics: an overview, D Grujic
• Crustal flow in Tibet: a review of geophysical evidence for the physical state of Tibetian lithosphere, S L Klemperer
• The channelling flow-extrusion hypothesis as developed for the Himalayan-Tibetan orogenic system, K V Hodges
• Crustal flow in large hot orogens, C Beaumont, M Nguyen, R Jamieson and S Ellis
• Growth of continental plateaus by channel injection: constraints and thermo-mechanical consistency, S Medvedev and C Beaumont
• Provenance of the Greater Himalayan Sequence and associated rocks: predictions of channel flow models, R Jamieson, C Beaumont, M Nguyen and D Grujic
• Kinematic dilatency effects on orogenic extrusion, B Grasemann, M A Edwards and G Wiesmayr
• Ductile extrusion in continental collision zones: ambiguites in the definition of channel flow and its identification in ancient orogens, R R Jones, R E Holdsworth, M Hand and B Goscombe
• Interpretation of deformation fabrics of infrastructure zone rocks in the context of channel flow and other models, P F Williams, D Jiang and S Lin
• Did the Himalayan Crystallines extrude from beneath the Tibetan Plateau?, T M Harrison
• Exhumation of Greater Himalayan rock along the Main Crustal thrust, Nepal: implications for channel flow, D M Robinson and O N Pearson
• Locking of southward extrusion in favour of rapid crustal-scale buckling of the greater Himalayan Sequence, Nar Valley, Central Nepal, L Godin, T P Gleeson, M P Searle, T D Ullrich and R R Parrish
• Mechanisms and time scales of granite magma segregation, ascent and emplacement in the Himalaya, B Scaillet and M P Searle
• Thermal evolution of leucogranites in extensional faults: implications for Miocene denudation rates in the Himalaya, C Annen and B Scaillet
• 40Ar/39Ar thermochronological constraints on the cooling and exhumation history of the South Tibetan Detachment System, Nyalam area, southern Tibet, Y Wang and G Qu
• Crustal stucture, restoration and evolution of the Greater Himalaya in Nepal-South Tibet: implications for channel flow and ductile extrusion in the middle crust, M P Searle, R D Law and M J Jessup
• Structural evolution and vorticity of flow during extrusion and exhumation of the Greater Himalayan Slab, Mount Everest Massif, Tibet/Nepal: implications for orogen-scale flow partitioning, M J Jessup, R D Law, M P Searle and M S Hubbard
• Pulsed channel flow in Bhutan, L S Hollister and D Grujic
• Normal-sense shear zones in the core of the Higher-Himalayan Crystallines (Bhutan Himalayas): evidence for extrusion?, R Carosi, C Montomoli, D Rubatto and D Visona
• Oligocene-Miocene middle crust flow in southern Tibet: geochronologic studies in Mabja Dome, J Lee, W C McClelland, Y Wang, A Blythe and M McWilliams
• The Malashan gneiss dome in south Tibet: comparative study with the Kangmar dome special reference to kinematics of deformation and origin of associated granites, M Aoya, S R Wallis, T Kawakami, J Lee, Y Wang and H Maeda
• Heterogeneous ductile deformation along a mid-crustal extruding shear zone: an example from the External Hellenides (Greece), P Xypolias and S Kokkalas
• The Appalachian Inner Piedmont: an exhumed strike-parallel, tectonically forced orogenic channel, R D Hatcher and A J Merschat
• An argument for channel flow in the southern Canadian Cordillera and comparison with Himalayan tectonics, R L Brown and D Gibson
• Ductile thrusting versus channel flow in the southeastern Canadian Cordillera: evolution of a coherent thrust sheet, S D Carr and P S Simony
• Possibility of channel flow in the southern Canadian Cordillera: a new approach to explaining existing data, Y D Kuiper, P F Williams and S E Kruse  

 

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