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Exhumation of metamorphic terranes: introduction

Published online by Cambridge University Press:  05 July 2018

S. J. Cuthbert  and
M. Ballévre
S. J. Cuthbert*
Affiliation:
Biological & Geological Sciences, School of Engineering and Science, University of Paisley, Paisley PA1 2BE, UK
M. Ballévre
Affiliation:
Laboratoire de Pétrologie, Géosciences Rennes, Université de Rennes I, 35042 Rennes Cedex, France
*
*E-mail: [email protected]
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Extract

Ever since the landmark paper by England and Richardson (1977) it has been clear that metamorphic rocks are not merely passively advected towards the surface during unroofing, but respond in a dynamic and interactive way to the mechanisms and rates of exhumation. England and Richardson based their modelling upon erosion-driven exhumation dominated by fluvial processes in mid-latitude climates. Since then a variety of mechanisms has been identified, mostly emphasizing tectonic mechanisms including extensional tectonics (e.g. Platt, 1996), tectonic extrusion (Chemenda et al., 1996; Hynes et al., 1996; Thompson et al., 1997) and ‘gravity currents’ (Wernicke and Getty, 1997). It has also become apparent that exhumation itself may be strongly influenced by metamorphic processes. For example, changes in petrophysical properties such as density may dramatically affect the buoyancy of rock masses and hence alter the driving forces for exhumation (Bousquet et al., 1997). The evolution of fluids or melts may create weak zones in the crust and enhance ductile or brittle deformation and shear zone development (e.g. Austrheim, 1998).

Type
Research Article
Information
Mineralogical Magazine , Volume 66 , Issue 1 , February 2002 , pp. 1 - 3
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2002

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References

Austrheim, H. (1998) Influence of fluid and deformation on metamorphism of the deep crust and consequences for the geodynamics of collision zones. Pp. 297–323 in: When Continents Collide: Geodynamics and Geochemistry of Ultrahigh-Pressure Rocks (Hacker, B.R. and Liou, J.G., editors). Kluwer Academic Publishers, Dordrecht, The Netherlands.CrossRefGoogle Scholar
Bousquet, R., Goffe, B., Henry, P., Le Pichon, X. and Chopin, C. (1997) Kinematic, thermal and petro-logical model of the Central Alps: Lepontine metamorphism in the upper crust and eclogitisation of the lower crust. Tectonophysics, 273, 105–127.CrossRefGoogle Scholar
Burbank, D.W. (2002) Rates of erosion and their implications for exhumation. Mineralogical Magazine, 66, 25–52.CrossRefGoogle Scholar
Chemenda, A.I., Mattauer, M. and Bokun, A.N. (1996) Continental subduction and a mechanism for exhumation of high-pressure metamorphic rocks: new modelling and field data from Oman. Earth and Planetary Science Letters, 143, 173–182.CrossRefGoogle Scholar
Droop, G. (2000) Preface. Geological Journal, 35, 137–138.CrossRefGoogle Scholar
England, P.C. and Richardson, S.W. (1977) The influence of erosion upon the mineral facies of rocks from different metamorphic environments. Journal of the Geological Society of London, 134, 201–213.CrossRefGoogle Scholar
Heinrich, C.H. (1982) Kyanite-Eclogite to amphibolite facies evolution of hydrous mafic and pelitic rocks, Adula nappe, central Alps. Contributions to Mineralogy and Petrology, 81, 30–38.CrossRefGoogle Scholar
Hynes, A. (2002) Encouraging the extrusion of deep-crustal rocks in collisional zones. Mineralogical Magazine, 66, 5–24.CrossRefGoogle Scholar
Hynes, A., Arkani-Hamed, J. and Greiling, R. (1996) Subduction of continental margins and the uplift of high-pressure metamorphic rocks. Earth and Planetary Science Letters, 140, 13–25.CrossRefGoogle Scholar
Miller, J.A., Buick, I.S., Cartwright, I. and Barnicoat, A. (2002) Fluid processes during the exhumation of high-P metamorphic belts. Mineralogical Magazine, 66, 93–119.CrossRefGoogle Scholar
Platt, J.P. (1996) Dynamics of orogenic wedges and the uplift of high-pressure metamorphic rocks. Geological Society of America Bulletin, 97, 1037–1053.2.0.CO;2>CrossRefGoogle Scholar
Stuart, F.M. (2002) The exhumation history of orogenic belts from 40Ar/39Ar ages of detrital micas. Mineralogical Magazine, 66, 121–135.CrossRefGoogle Scholar
Thompson, A.B., Schulmann, K. and Jezek, J. (1997) Extrusion and elevation of lower crustal metamorphic rocks in convergent orogens. Geology, 25, 491–494.2.3.CO;2>CrossRefGoogle Scholar
Wernicke, B. and Getty, S.R. (1997) Intracrustal subduction and gravity currents in the deep crust: Sm-Nd, Ar-Ar, and thermobarometric constraints from the Skagit Gneiss Complex, Washington. Geological Society of America Bulletin, 109, 1149–1166.2.3.CO;2>CrossRefGoogle Scholar
Whittington, A.G. and Treloar, P.J. (2002) Crustal anatexis and its relation to the exhumation of collisional orogenic belts, with particular reference to the Himalaya. Mineralogical Magazine, 66, 53–91.CrossRefGoogle Scholar