Buchitic glassy rocks appear within the skarn of contact metamorphic aureole of Feshark intrusive complex situated 30 km northeast of Isfahan. Intrusive complex is a multistage intrusion . Noritic gabbro is the first inttrusion which is invaded later on by a granitic melt. Granitic melt has metasomatically altered the gabbro and as a consequence a suite of hybrid rocks like monzogabbro, m...

The capacity of oceanic crust to record geomagnetic polarity reversals makes sea-surface magnetic anomalies an essential tool study plate tectonics. are usually well-defined at magmatic spreading centers, but distorted and eventually disappear on magma-poor mid-ocean ridges such as the ultraslow Southwest Indian Ridge (SWIR), making their interpretation difficult. We attribute variability SWIR ...

mafic and ultramafic plutonic igneous bodies, with small and big outcrops, between shemshak rock units (jurassic) are observed in east of imam zadeh hashem, in southern guilan province. ultramafic cumulates consist of clinopyroxenite, and plagiofer clinopyroxenite, olivine clinopyroxenite, and mafic rocks, based on mineralogy consist of gabbros, olivine gabbros, biotite gabbros and amphibole ga...

This article presents the results of a study Late Mesozoic intrusive formations Omulevka terrane Verkhoyansk–Kolyma orogenic region. The research area covers Selennyakh block and territory adjacent to south. compositions rock-forming, accessory restitic minerals geochemical features rocks are considered. methods optical microscopy, microprobe, silicate spectral analyses were used. There followi...

The northern part of the North Atlantic Craton (NAC) in southern West Greenland comprises a large tract exposed Meso-Neoarchaean continental crust, divided into ca 3300–2900 Ma Akia and 2900–2500 Tuno terranes. We combine aeromagnetic, stream sediment geochemical, new litho-chemical zircon geochronological data with previously published to re-evaluate crustal architecture evolution terrane its ...