The central region of the mainland Lewisian gneiss complex of NW Scotland is a granulite-facies migmatite terrane.With the exception of ultramafic and rare calc-silicate rocks, all other lithologies partially melted during Neoarchaean, ultrahigh-temperature (Badcallian) metamorphism. The clearest evidence is preserved within large layered mafic^ultramafic bodies that exhibit macroscopic feature...

Undoubtedly, involving more tools, datasets, and techniques for detecting the mineralized areas sharply narrow zones to be investigated delivered, in most cases highly potential zones. Consequently, this study is an attempt apply remote sensing data including Sentinel 2 ASTER, field observations, petrography of hydrothermal alteration processes, ore microscopic investigations, X-ray examination...

This study evaluates the geological attributes of rocks within Abu Ghalaga area using spatial, geochemical, and petrographic approaches. ASTER Landsat imagery processed band ratio principal component analysis were used to map hydrothermal alterations, while a regional tectonic evaluation was based on automated extraction lineaments from digital elevation model. Geochemical analyses then employe...

The current study presents the integration between field observations and remotely sensed data for detection extraction of geological structural features using Sentinel-2A Aster DEM images. area under investigation is represented by Neoproterozoic East African Orogeny encompassing a part Arabian Nubian Shield. All rock units studied belong to Late Cryogenian-Ediacaran periods that are divided 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...

Exposures of arc crustal sections represent rare opportunities to directly evaluate lower magmatic processes and their link products in the middle upper crust. Within southernmost Sierra Nevada batholith, Bear Valley Intrusive Suite (BVIS) exposes a contemporaneously constructed ~ 30 km thick intrusive suite, thus is ideal for this type examination. Here we present detailed petrography mineral ...

-The Fawakhir ophiolitic sequence is composed mainly of serpentinites, metagabbros, boninitic metagabbros and metavolcanics. The serpentinites have geochemical features similar to those of depleted-mantle peridotites. Major and trace element characteristics show that the ophiolitic metagabbro and metavolcanic rocks are of tholeiitic to calc-alkaline affinity. REE abundances in the metagabbros a...

7 The Unst Ophiolite is the best exposed of a chain of early Ordovician ophiolites in the 8 Scottish Caledonides and is widely regarded as having formed in a supra-subduction zone 9 setting within the Iapetus Ocean. Reinterpretation of sheeted dykes suggests that it formed 10 as an oceanic core complex, presumably during subduction roll-back immediately prior to 11 obduction onto the Laurentian...