This study combines field observations, mineral and whole-rock geochemistry, phase equilibrium modeling, U-Pb sensitive high-resolution ion microprobe (SHRIMP) zircon geochronology to investigate sillimanite-bearing felsic migmatites exposed on Ledge Mountain in the central Adirondack Highlands (New York, USA), part of an extensive belt mid-crustal rocks comprising hinterland Mesoproterozoic Gr...

The Archaean crustal evolution of the northern São Francisco Craton (SFC) reveals significant similarity with Kaapvaal-Zimbabwe and Pilbara, cratons, especially before 3.0 Ga. Likewise, compiled geochronological Nd-Sr-Hf isotope data suggest that blocks part SFC (e.g. Gavião, Uauá Serrinha) shared similar since 3.15 3.42–3.35 Ga TTGs southern western Gavião Block have negative slightly positive...

Abstract Assigning correct protolith to high metamorphic-grade core zone rocks of large hot orogens is a particularly important challenge overcome when attempting constrain the early stages orogenic evolution and paleogeography lithotectonic units from these orogens. The Gurla Mandhata complex in NW Nepal exposes Himalayan metamorphic (HMC), sequence gneiss, migmatite, granite, hinterland oroge...

Abstract Large-scale strike-slip faults are fundamental tectonic elements of the continental lithosphere. They constitute plate boundaries (continental transforms), separate terranes with contrasting geological histories within accretionary orogens, or accommodate heterogeneous deformation in intracontinental settings. In ancient where deeper levels crust exposed, these expressed as shear zones...

A common and puzzling feature of migmatite terranes is the presence of synkinematic leucosomes oriented perpendicular to the maximum principal compressive stress axis, s1, particularly leucosomes oriented parallel to the axial plane of folds. These are parallel to planes of compaction, but experiments predict that leucosomes should form in dilational bands oriented instead at small angles to s1...