: Despite that, in the Alvand complex, the mafic-intermediate rocks (gabbros, diorites and tonalites) are mostly older than felsic rocks (granodiorites and monzogranites), and mineralogical and geochemical discontinuity is seen between them, there are evidence that indicate they have sometimes been co-existed. With the studies on field relationship of rocks, xenocrysts assemblages, synplutonic ...

In the west of Marand in Ghekhlar area, the Upper MiocenePleistocene volcanic rocks, including intermediate to acidic basic alkaline and lampr~phyric, are extensive exposed. Trachy-andesite rocks of this area contain carbonatite-silicate xenoliths, which according to mineralogical studies, are calcite - carbonatite type. The minerals of calcite, diopside, anorthite, phlogopite, amphibole, ...

The studied area is located about 35 KM north-west of Rafsanjan (Kerman Province) and belongs to Hezar volcanic complex (in Uromieh-Dokhtar volcanic belt) and consists of Eocene folded lava flows (basalt, basaltic andesite, andesite) and pyroclastic rocks. Plagioclase phenocrysts show evidences of disequilibrium textures such as sieve texture, resorption and oscillatory zoning. These features c...

The study area is located in the southern part of Qorveh granitoid complex. Investigation of textural and mineral chemistry evidence in granitoid host with composition of granodiorite, granite, qtz-monzonite, and mafic microgranular enclave (MME) with composition of qtz-diorite to meladiorite, are focused in this paper. Microscopic study and data of microprobe analyses in host and enclave rocks...

The Kub-e- Zar area is located about 75 Km in southeast of Semnan. Electron microprobe analyses of plagioclases of mafic microgranular enclaves and plutonic host rocks from Kuh-e-Zar area display that they have normal, oscillatory and reverse zoning, so that plagioclase cores of reverse zoning in enclaves have oligoclase and andesine compositions and their rims have andesine and laboradori...