نتایج جستجو برای: dioritic
تعداد نتایج: 89 فیلتر نتایج به سال:
New zircon U-Pb-Hf-O isotope, whole rock geochemical and Sr-Nd-Pb isotope data of Variscan felsic to intermediate rocks from the Odenwald-Spessart basement, Mid-German Crystalline Zone, Germany are presented. Peraluminous, high-K calc-alkaline S-type granite in eastern Odenwald basement (Group 1 rocks) formed by partial melting lower crust at c. 425 Ma. Their composition indicates presence sedi...
Quartz-monzonitic porphyry stock at Kighal is located about 12 km north of Varzeghan, East Azarbaidjan Province, NW Iran. It has intruded older volcanic units during magmatic activities of Pyrenean orogenic phase and produced Cu-Mo mineralization and hydrothermal alteration zones in the region. The stock was intruded by numerous cross-cutting dikes mainly of dioritic to quartz-dioritic composit...
Abstract Systematic changes in whole-rock chemistry, mineralogy, mineral textures, and chemistry are seen along a ca. 95-km traverse of late Archean granitoid orthogneisses the Shevaroy Block, Eastern Dharwar Craton, southern India. The passes from amphibolite-grade gneisses north to granulite-grade rocks (charnockite) south. Changes include depletion Rb, Cs, Th, U granulite grade as relative a...
A wide range of plutonic rocks, ranging from mafic to felsic compositions, including various gabbros, diorites, tonalites, granodiorites, monzogranites, syenogranites and leucocratic granitoids, occur in the Alvand plutonic complex, Sanandaj-Sirjan zone, Iran. Age of this complex is middle Jurassic. In this complex, granitic and dioritic rocks occur as major constituents. Granites contain plagi...
The Kaimuqi area in the Eastern Kunlun Orogen (EKO) contains many lherzolite, olivine websterite, gabbro and diorite intrusions, new zircon U–Pb dating, Lu–Hf isotope whole-rock geochemical data are presented herein to further confirm Late Triassic mafic–ultramafic magmatism with Cu–Ni mineralization discuss petrogenesis geodynamic setting. Zircon dating shows that ages, corresponding 220 Ma 22...
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