the etive igneous complex has intruded into dalradian and moine meta-sedimentary rocks in devonian. main rock types of the complex are granodiorite, monzodiorite, monzogranite, granite and diorite. geochemical studies show that the magmas were of high k calc-alkaline, i-type and metaluminous nature. application of discriminant diagrams to the etive rocks indicates a possible within-plate tecton...

the present study investigates the crystal preferred orientation (cpo) of quartz crystals in psammitic rocks to ascertain the deformationmechanism using electron backscatter diffraction (ebsd) on quartz crystals from north of the renvyle-bofin slide (rbs) nearletterfrack in western ireland. complete crystallographic orientations were determined for several thousand individual quartz crystalsin ...

background: glass and quartz fiber posts are used in restoration of structurally compromised roots. accessory fiber posts are recently introduced to enhance the fiber post adaptation. this study evaluated the effectiveness of glass versus quartz accessory fiber posts. materials and methods: in this experimental study, 40 mandibular premolar roots with similar dimension (radius of 3.5 ± 0.2 mm a...

Abstract Granite rocks are currently one of the foremost raw materials that can be used for various economic purposes such as ornamentation and building materials, because they do not possess radioactive concentrations have good physical mechanical properties. The granite north Um Taghir connected to neoproterozoic integrated Arabian-Nubian Shield (ANS), which lies in Northeast Africa. Inductiv...

introduction the avan cu-fe skarn is located at the southern margin of qaradagh batholith, about 60 km north of tabriz. the skarn-type metasomatic alteration is the result of qaradagh batholith intrusion into the upper cretaceous impure carbonates. the studied area belongs to the central iranian structural zone. in regional scale, the studied area is a part of the zangezour mineralization zone ...

The Shaitian granite complex (SGC) spans more than 80 Ma of crustal growth in the Arabian–Nubian Shield southeast Egypt. It is a voluminous composite intrusion (60 km2) comprising host tonalite massif intruded by subordinate dyke-like masses trondhjemite, granodiorite and monzogranite. tonalite, turn, encloses several, fine-grained amphibolite enclaves. U-Pb zircon dating indicates wide range c...

Infrared spectra (IR) in the O-H stretching region were recorded for natural tourmalines from magmatic and magmatic-hydrothermal systems of Moslavacka Gora (Croatia). Samples disseminated tourmaline (schorl) representing products collected leucogranite. Nodular (intermediate members schorl-dravite series) twomica granite represents a mineral related to final stage crystallization. IR typically ...

Abstract The Arbus igneous complex (SW Sardinia, Italy) represents a good example of short time lived post-collisional composite pluton emplaced at shallow crustal level in the external zone Variscan chain. almost consists granodiorite and leucogranite rock- suites 304 ± 1 Ma within main NW trending thrust separating metamorphic wedge from fold belt foreland. into dilatational step over connect...

Rock varnish, erosional grooves, and well-developed cavernous weathering phenomena occur in close association on a small biotite-monzogranite nunatak in the Northern Foothills region, Northern Victoria Land, Antarctica. The grooves, similar in appearance to the ‘rinnenkarren’ described in the karst literature, are developed on steeply inclined (>35°) bedrock surfaces while the rock varnish occu...