We calculate physical properties of rocks in subduction zones using a compilation of mineral physical property measurements, a new set of phase diagrams and subduction-zone thermal models, and apply our results to Cascadia. Observed P-wave speeds of the Juan de Fuca plate west of the Cascadia trench are best matched by a greenschist-facies upper crust and metastable, partially hydrated lower cr...

The Taku Schist, which is located in the north-east Peninsular Malaysia, characterized by its North-South oriented elongated body. It forms part of Indonesian orogenic build-up that was generated via convergence Sibumasu continental unit and Sukhothai Arc. Subsequent petrography analyses metasedimentary rocks sourced from Schist revealed their formation attributable to metamorphism greenschist ...

The Palaeoproterozoic Great Slave Lake shear zone (GSLsz) is a crustal-scale strike-slip structure, with total length of >1,000 km and width ~25 km, that separates the Archean Rae cratons. range metamorphic rocks now exposed at surface encompasses granulite facies mylonite through to lower-greenschist ultramylonite cataclasite, providing potential type example fault-zone structure in middle low...

INTRODUCTION The rocks on the Greek island of Syros are part of a suite of high pressure metamorphic rocks which outcrop all across the Cyclades. There is a complex metamorphic history recorded in the rocks here, including a Cretaceous or Eocene high-pressure blueschist event and a Miocene, extension-related greenschist overprint. The Island of Syros is mostly composed of schists , which altern...

We investigated the crystal and structural behavior of several Cr-bearing spinels from the Archean chromitites of Amsaga (Mauritania). The chemical and structural data testified a retrograde metamorphism from amphibolite to greenschist facies, witnessed by relative changes in the amount of all the major oxides (Cr, Al, Mg, Fe2+, Fe3+), the relative proportion of Fe/Fetot as well as the structur...