The Proterozoic eon is characterized by an unusual abundance of ferroan feldspathic rocks that range in composition from granite to quartz syenites to feldspathoid-bearing syenites. Three associations of ferroan rocks may be recognized on the basis of major element compositions: (1) metaluminous alkalic to alkali-calcic syenites and granites associated with anorthosites and iron-rich basaltic r...

Abstract Granite typology categorizes granitoid rocks based upon distinguishing characteristics that are interpreted to indicate sources, conditions of generation, and, by implication, tectonic setting. Complexities elemental and isotopic geochemistry, however, commonly preclude simple typological interpretation suggest more complex petrogenetic histories. Granitoids from the Songpan-Ganzi terr...

the area of study is located 120 km north-east of shahrood city. in terms of structure and geological classification, this area is located in the northern part of central iran zone. granitoids of troud ranging from monzonite to granite. the main minerals of granitoids are quartz, plagioclase, and orthose. the accessory minerals are biotite, hornblende, sphene, and opaque minerals. various textu...

most skarn deposits are directly related to magmatic activity, and there is a systematic correlation between composition of causative plutons and the metal contents of the related skarns. darreh zerreshk deposit is located in southwest of yazd. petrological and geochemical studies show that darreh zerreshk granitoid ranges in composition from granite through quartz monzodiorite and has subalkal...

Abstract One of the most important processes heat generation from Earth's interior is radioactive decay isotopes. The main hosts major radiogenic elements U, Th and K in crust are granitoids. Sierras de Córdoba formed dissimilar granitic intrusions emplaced by a series magmatic events that occurred during Paleozoic. different granitoids classified as A-type, I-type, S-type, there also expressio...

To ascertain the Early-to-Middle Jurassic tectonic setting in central Great Xing’an Range, this study investigated Early and Middle granitoids exposed Chaihe area Range based on isotopic chronology petrogeochemistry. The results of show that have emplacement ages 179–172 Ma. Moreover, are high-K calc-alkaline unfractionated I-type fractionated granitoids, respectively. magma sources both origin...

Abstract We provide laser ablation–multicollector–inductively coupled plasma–mass spectrometry (LA-MC-ICP-MS) and high-precision chemical abrasion–isotope dilution–thermal ionization mass (CA-ID-TIMS) U-Pb ages Hf isotopic compositions of zircons from the Red Bluff Granite Suite mafic dikes in Franklin Mountains El Paso, Texas, USA. Granitoids exposed were previously divided into five magmatic ...