Detachments in high-pressure mountain belts, Tethyan examples

Details Detachments in high-pressure mountain belts, Tethyan examples Detachments in high-pressure mountain belts, Tethyan examples

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998e%26psl.160...31j&link_type=abstract

Earth and Planetary Science Letters, vol. 160, Issue 1-2, pp.31-47

Other

26

Extension, Tectonics, Exhumation, High Pressure, Metamorphism, Metapelite

Scientific paper

Using the case examples of the phyllite-quartzite nappe of Crete, the Bündnerschiefer nappe of the Engadine window in the Alps, and the infraophiolitic units of the Saih Hatat window in the Oman Mountains, we describe the tectono-metamorphic signature of large-scale extensional detachments in high-pressure belts. In these three cases retrograde P-T paths were accompanied by the formation of large-scale extensional shear zones that contributed to the exhumation and extreme thinning of the metamorphic pile. The direction of transport along later detachments was parallel to the direction of convergence, detachments being first localized within or near the brittle-ductile transition zone. Below the major shear zone, or between the shear zones in Oman, the deformation regime was more coaxial and involved a significant component of vertical shortening. Metamorphic data, mostly derived from the petrology of metapelites, show that domains characterized by coaxial strain have nearly isothermal decompression paths (type II), while those immediately below the detachments were subjected to more efficient cooling during exhumation (type I). The detachments thus affect both the deformation history and the P-T evolution of the lower plate. The existence of the two types of cooling paths is a good test of the extensional nature of a tectonic contact.

Affiliated with

Also associated with

No associations

Rating

Detachments in high-pressure mountain belts, Tethyan examples does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Detachments in high-pressure mountain belts, Tethyan examples, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detachments in high-pressure mountain belts, Tethyan examples will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1344771