Orogenic uplift and collapse, crustal thickness, fabrics and metamorphic phase changes: the role of eclogites

@article{Dewey1993OrogenicUA,
  title={Orogenic uplift and collapse, crustal thickness, fabrics and metamorphic phase changes: the role of eclogites},
  author={J. Dewey and P. Ryan and T. Andersen},
  journal={Geological Society, London, Special Publications},
  year={1993},
  volume={76},
  pages={325 - 343}
}
  • J. Dewey, P. Ryan, T. Andersen
  • Published 1993
  • Geology
  • Geological Society, London, Special Publications
  • Abstract Coesite-bearing eclogites in several deep crustal metamorphic assemblages now exposed in extensionally-collapsed orogens indicate the tectonic denudation of more than 90 km of crustal rocks and pre-collapsed crustal thicknesses of at least 120 km. For mountain ranges and orogenic plateaux up to 5 km in elevation and average crustal densities of about 2.8, crustal thickness cannot exceed about 80 km unless pre-shortening crustal/lithosphere thickness ratios were less than 0.135 or some… CONTINUE READING

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