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 extensional collapse of the Scandinavian Caledonides resulted in rapid tectonic denudation of the orogen, exhumation of highand ultra-high-pressure metamorphic rocks and provided a structural template for the formation of Devonian supra-detachment sedimentary basins. The geometry and intensity of the extensional deformation show considerable variation vertically in the crustal section as we...

INTRODUCTION The field trip today will concentrate mostly on the metamorphic effects on the Biwabik Iron Formation, at the Peter Mitchell mine of eastern Mesabi Iron Range, caused by intrusion of the nearby Mesoproterozoic Duluth Complex (1.1 Ga). The stratigraphy of the iron-formation that is used at this mine, and nearby mines, was mainly developed by Gundersen and Schwartz (1962) and is depi...

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...

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...

Robat-e Zengejeh rocks affected by a variety of events began from Precambrian. This research studied preserved effects of the events. Regional metamorphism is the oldest event in this rocks include schist, amphibolite and orthogneiss, that reached up to amphibolite facies. After this regional metamorphism, it seems that mesocratic (624±5Ma) and hololeucocratic granitoides intruded respectively....