Skip to main content

A clockwise P-T path of anatectic metapelites from Wadi Shiban: implication for crustal evolution in southwestern Yemen

Buy Article:

$39.00 plus tax (Refund Policy)


Microstructural relations and the inferred sequence of mineral reactions indicate that Wadi Shiban metapelites in southwestern Yemen developed in response to continuous P-T changes during a single metamorphic event. The rocks followed a clockwise P-T path involving decompression during cooling. The prograde evolution was characterized by muscovite and biotite volatile phase absent-melting reactions. Retrograde metamorphism involved formation of intergrowths of plagioclase + biotite + quartz ± muscovite or chlorite + plagioclase + quartz + biotite + magnetite on garnet grains in proximity to leucosomes as well as formation of late muscovite after sillimanite, alkali feldspar and garnet. Geothermobarometric calculations indicate 813°C and ∼ 7.5 kbar for the metamorphic peak followed by decompression at ∼ 751°C. The high T/P ratio (>100° C/kbar) inferred for the Wadi Shiban metapelites close to the metamorphic peak suggests an additional heat input, probably due to significant thinning of the mantle lithosphere causing rapid heating of the overlying crust. However, the P-T path indicates that the crust in southwestern Yemen involved initial crustal thickening and burial of the sediments (∼ 22 km deep), followed by rapid tectonic exhumation during cooling to a shallower level (∼ 7 km deep).


Document Type: Research Article


Publication date: 2008-03-01

More about this publication?
  • Neues Jahrbuch für Geologie und Paläontologie continuously publishes current original contributions from all fields of geology, ever since its foundation in 1807. All published contributions are in the English language.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more