Metamorphism along the southern margin of the Archean Superior Province has been historically attributed to the Penokean orogeny. A narrow corridor of amphibolite facies rocks north of the main suture does record 1.83–1.80 Ga metamorphic monazite U–Th–Pb ages that mark the culmination of arc accretion. However, subsequent widespread amphibolite facies metamorphism and associated magmatism is re...

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...

We have dated the South Delhi orogeny, Aravalli-Delhi Mobile Belt (ADMB), NW India, using tectonic fabric, geochemistry, and zircon-monazite geochronology as proxies. The Terrane (SDT), a passive margin domain in ADMB, consists of multiply deformed (D 1 –D 4 ) greenschist facies rocks several granite plutons. D deformation is characterized by pervasive isoclinal recumbent F fold axial planar te...

Abstract The southern Patagonian Andes record Late Cretaceous–Paleogene compressional inversion of the Rocas Verdes backarc basin (RVB) and development fold-thrust belt (FTB). A ductile décollement formed in middle crust accommodated underthrusting, thickening, tectonic burial continental margin (Cordillera Darwin Metamorphic Complex (CDMC)) beneath RVB. We present new geologic mapping, quartz ...

Abstract The rates and mechanisms by which deeply subducted continental crust was exhumed back to the surface are not well understood, but can be better characterized using multimineral petrochronology. Here, we combine zircon, titanite, apatite U-Pb ages from leucogranite phengite gneiss with a pressure–temperature (P–T) path eclogite provide robust quantitative constraints on cooling exhumati...

The Allatoona thrust fault in the southernmost hinterland of Appalachian Blue Ridge-Piedmont megathrust sheet is among latest structures kinematic sequence events along west flank orogen. It an out-of-sequence, craton-directed that cuts metamorphic isograds and earlier thrusts, it has a nearly linear trace ≥280 km, making one major faults On northwest, Pennsylvanian or younger(?) regional cross...

Determining the tectonic evolution and thermal structure of a unit that experiences subduction-related pressure temperature (P-T) loop is challenging. Within single unit, P-T conditions can vary from top to bottom which only be revealed by detailed petrological work. We present micropetrological data middle section Cycladic Blueschist Unit (CBU) in Naxos, Greece, indicates different than for se...

Rodingite represents a particular metasomatic rock type that occurs as dykes or lenses in association with serpentinized ultramafic rocks and typically consists of Ca-rich, often hydrated silicate minerals. Rodingites have been recognized source information on fluid compositions their circulation both ocean floor subduction environments. Yet, the nature protoliths, chemistry origin fluids, deta...

Abstract The Juomasuo Au–Co deposit, currently classified as an orogenic gold deposit with atypical metal association, is located in the Paleoproterozoic Kuusamo belt northeastern Finland. volcano-sedimentary sequence that hosts was intensely altered, deformed, and metamorphosed to greenschist facies during 1.93–1.76 Ga Svecofennian orogeny. In this study, we investigate temporal relationship b...

The development and structure of Neoproterozoic III volcanosedimentary basins in the northeastern part of the Arabian shield record periods of uplift, erosion, extension, subsidence, compression, and strike-slip faulting that postdated the completion of terrane amalgamation in the northern East African orogen (EAO) and predated the initiation of a passive margin on the northern flank of the Gon...