The 40Ar/39Ar method applied to K-feldspars and muscovite has been often used construct continuous thermal history paths between ~150–600 °C, which are usually structural tectonic questions in many varied geological settings. However, other authors contest the use of thermochronology because they argue that assumptions rarely valid. Here we review evaluate key assumptions, (i) 40Ar is dominantl...

In this study, petrological, structural, geochemical, and geochronological analyses of the Statherian alkali feldspar granite porphyritic in southwestern part Korean Peninsula were conducted to examine petrogenesis granitoids their tectonic setting. Zircon U-Pb dating revealed that two granites formed around 1.71 Ga 1.70–1.68 Ga, respectively. The results geochemical showed both have a high con...

In this study, petrological, structural, geochemical, and geochronological analyses of the Statherian alkali feldspar granite porphyritic in southwestern part Korean Peninsula were conducted to examine petrogenesis granitoids their tectonic setting. Zircon U-Pb dating revealed that two granites formed around 1.71 Ga 1.70–1.68 Ga, respectively. The results geochemical showed both have a high con...

Abstract This study describes mineralogical and crystallochemical characteristics of metamorphic tourmalines from an Alpine shear zone in a Variscan rock sequence the Maramures region northern part East Carpathians. We use this mineral to unravel aspects evolution tourmaline bearing host rocks compare crystallo-chemical other Alps. Petrographic microstructural observations, as well electron mic...

The petrogenesis of aluminous A-type granites is a contentious subject. Here, we focused on the North Kudi pluton in Western Kunlun orogen to investigate origin and magmatic processes responsible for generating granites. Samples from are metaluminous weakly peraluminous. K-feldspar granite samples characterized by high alkali Cl contents, HFSE concentrations FeO/MgO, low F content, negative Ba,...

The use of white cements as a building material is widely employed due to its high whiteness and reflectance. However, materials should adopt better thermal insulation characteristics contribute for significant urban heat-islands mitigation. In this work, synthetic feldspar has been evaluated partial total replacement sand in cement mortars. Thermal, mechanical, optical properties these new mor...

Geochemical, isotopic and age constraints support a comagmatic origin for Ghuweir Mafics and the Feinan A-type granites. The two rocks types, named collectively in this paper as the Feinan Ghuweir Magmatic Suite (FGMS), formed between 556 and 572Ma ago according to Rb–Sr whole-rock dating. FGMS has low Sr initial ratios, which preclude a significant contribution of much older crust in the magma...

Different rock types (syenogranite, alkali feldspar granite and quartz syenite intruded by microgranite dikes veins) were investigated in the Nikeiba region Egypt. The main components of studied intrusive rocks, comprised granites syenite, are plagioclase, amphibole, biotite, K-feldspar different proportions. Ground gamma ray measurements show that syenogranite, have highest radioactivity (K, e...