Long-lived collisional orogens that formed over tens to hundreds of millions years are common in the geologic record. The Trans−North China orogen marks collision between Eastern and Western blocks North craton, it preserves metamorphic rocks with ages 1.98 Ga 1.80 Ga. These units allow detailed assessment time scale duration crustal thickening, exhumation, cooling associated a major Proterozoi...

Tourmaline can be found as an accessory mineral in a variety of rocks including leucogranite, pegmatite, quartz veins, and metamorphiccountry rocks in Hajiabad-Dehgah area in SE of Boroujerd city. Tourmaline in pegmatites is coarse-grained, subhedral to euhedral, anddisplays strong to moderate pleochroic blue rimmed by olive green. In contrast, tourmalines from leucogranite, quartz-veins, and h...

Molybdenum isotopes have emerged as novel tracers for high-temperature igneous and metamorphic processes. The debate remains to what extent different subducted slab lithologies, such oceanic crust marine sediments, contribute the Mo isotope signature of arc magmas and, hence, exert controls on terrestrial cycle. Here we investigate systematics from input output at Tongan subduction zone: Arc la...

andalusite, kyanite and sillimanite occur in well-defined zones in the ardara aureole, nwireland. temperature and pressure conditions of the al2sio5-bearing pelites in this aureole wereestimated using ten different calibrations of garnet-biotite thermometry and five calibrations of garnetplagioclase-al2sio5-quartz barometry. the different calibrations provide different estimates oftemperature a...

Abstract The Flinton Group is a metasedimentary succession of the Grenville Province in SE Ontario, potentially allowing insight into tectono‐thermal evolution continental crust during Mesoproterozoic. At its Green Bay locality, metapelites staurolite zone contain abundant, post‐kinematic garnet porphyroblasts. Whereas larger crystals are typically impinged, smaller isolated from each other, oc...