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

@inproceedings{Dewey1993OrogenicUA,
  title={Orogenic uplift and collapse, crustal thickness, fabrics and metamorphic phase changes: the role of eclogites},
  author={John F Dewey and Paul D. Ryan and Torgeir B Andersen},
  year={1993}
}
Coesite-bearing eclogites in several deep crustal metamorphic assemblages now exposed in extensionally-collapsed orogens indicate the tectonic denudation of more than 90km of crustal rocks and pre-collapsed crustal thicknesses of at least 120km. 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 way can be… CONTINUE READING

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