the study area is located at the sanandaj-sirjan zone in the west and north-west of azna and north-east of doroud, iran. the quartz-schists are divided into two main groups: amphibole-quartz schist and garnet-quartz schist. field and microstructural studies show several deformational phases. the d1 episode which is represented by s1, matches with m1 metamprphism and d2 deformation matches with ...

Subduction erosion is widely thought to play a significant role in crustal recycling at modern convergent plate margins. However, identifying subduction fossil accretionary margins difficult due multiple episodes of tectonic superimposition and an absence direct geophysical evidence. By assessing provenance metamorphic records this study, we are the first document record Late Triassic Middle Ju...

Ultra-high-pressure (UHP) eclogites and ultramafites associated fluid inclusions from the Western Gneiss Region, Norwegian Caledonides, have been analysed for F, Cl, Br I using electron-probe micro-analysis, time-of-flight secondary ion mass spectrometry neutron-irradiated noble gas spectrometry. Textures of multi-phase in cores silicate grains indicate formation during growth host crystal at U...

Abstract. An eclogite-facies orthogneiss and host paragneiss from a quarry near Tavagnasco in the Lower Aosta Valley were studied order to refine protolith, provenance metamorphic ages of Eclogitic Micaschist Complex Sesia Zone. The contains jadeite with quartz + phengite K-feldspar ± garnet rutile zircon, whereas hosts glaucophane epidote quartz. Phase diagram modeling two representative sampl...

The Hera Au-Ag-Pb-Zn deposit of central New South Wales, Australia with a total undepleted resource 3.6 Mt @ 3.3 g/t Au, 25 Ag, 2.6% Pb and 3.8% Zn occurs on the SE margin Cobar Basin. It is hosted by shallow marine Mouramba Group overlying turbiditic Amphitheatre Group. siltstones comprise various mixtures quartz, plagioclase, muscovite-phengite, biotite clinochlore, along accessory titanite i...

This study presents the first geochemical, mineralogical and petrological data on mafic ultramafic rocks of Texenna (Lesser Kabylia, north-eastern Algeria) with aim constraining their tectonic setting in context Maghrebide belt. The magmatic-sedimentary complex comprises serpentinite, metabasites (metagabbro, metadolerite metabasalt pillow-lava structures), oceanic metasediments (radiolarite ca...

Abstract Eclogite-facies mineral assemblages are commonly preserved in mafic protoliths within continental terranes. It is widely accepted that the entirety of these terrains must also have been subducted to eclogite-facies conditions. However, evidence felsic material transformed at conditions lacking. Low-strain metagranites ultrahigh-pressure metamorphic Tso Morari Complex Ladakh, Himalaya, ...

The Austroalpine nappe stack of the Pohorje Mountains (Mts.) in northeastern Slovenia comprises a suite eclogite facies metamorphic rocks that were partially assigned to Eo-Alpine ultrahigh-pressure metamorphism (UHPM). We selected micaschist, which was previously related this metamorphism, for detailed study including chemical zonation garnet and potassic white mica, identification mineral inc...

The tectono-metamorphic evolution of the European Alps is still contentious. Monte Rosa tectonic unit a prominent nappe in Central and estimates its peak Alpine pressure (P) temperature (T) conditions are essential for reconstructing evolution. However, reported vary considerably between 1.2 2.7 GPa 490 640°C variety lithologies. Here, we show petrology pseudosection modelling metapelitic assem...