---

Zircon is a tetragonal crystal and records different episode(s) of geology in external morphology and internal textures. Factors affecting the shape of the zircon crystals are the composition, possibly the temperature of the crystallization and water content in magma. The zircon typology of the Ghaleh-Dezh granite mostly introduces the fields P5 in classification of Pupin (1990), therefore, show mantle source for the granite. The dominant morphology of the zircon grains reveals a strong dominance of {100} prisms and {101} pyramids over {110} prisms and {211} pyramids. The dominant morphology shows high alkalinity, the temperature of crystallization about 850 ºC and dry alkalic nature for the granite. Absent of hydrozircon overgrowth indicate dry magma. Also, the Zr saturation temperature based on zircon solubility reflects a mean temperature of 835 °C. All of information is corresponded by petrography and geochemical evidences and also with a-type granitic magma that has mantle and crust sources.

---

The Ghoshchi batholith, ~150 km² in size is a granitoidic pluton, which intruded the Permian country rocks, in Sanandaj-Sirjan Zone, NW Iran. This granitoidic pluton is covered by Oligocene-Miocene sedimentary rocks known as Qom Formation. The Ghoshchi batholith comprises five plutons with following compositions: (a) gabbro-diorite (b) biotite granite, (c) alkali granite, (d) syenites, and (e) aplitic dikes. Gabbro-diorites are the oldest intrusive unit and have interaction zone with biotite granites. These rocks have within-plate tholeiitic nature. Graphic, microgranophyric, and perthitic textures can be found in alkali-feldspar granites, indicate their shallow emplacement depth and hypersolvus nature. Alkali-feldspar granites geochemically are high-k alkaline, metaluminous to mildly peralkaline. The alkali-feldspar granitic rocks contain lower Al₂O₃, CaO, Fe₂O₃, TiO₂, Ba, Rb, and Sr but higher SiO₂, Na₂O, K₂O, Nb, Th, Y and Zr than biotite granites samples. Alkali-feldspar A-type within-plate granites were presumably formed by high degree of fractional crystallization of mantle derived mafic magmas. Plagioclase and amphibole are two main fractionated minerals. The Alkali-feldspar granites fall into the A₁ group (mantle derived) suggesting an anorogenic tectonic setting. Biotite granites and syenites are peraluminous and have crustal source.

---

East misho granitoid intrusion body, a part of Alborz-Azarbaijan zone, is located about 60 Km north west of Tabriz, NW Iran. This pluton with an area of about 50 km² has cut percamberian unmetamorpic sedimentary rocks and, is covered with Permian sedimentary rocks with igneous nonconformity. Litological composition of the studied pluton displays a range of alkali granite, monzogranite and syenogranite. The dominant texture of the samples are granular, inequidimentional granular, pertite and myrmekite. Major minerals include quartz, K-feldspar and plagioclase, and minor and accessory minerals are biotite, amphibole, pyroxene, apatite, titanite and zircon. The Pluton composition is alkali-granite and displays metaluminous to peraluminous nature. Negetive Ba, Nb, Ti, Sr and Eu anomalies and enrichment in LILEs especially in Rb and Th suggests the crustal origin of these rocks. East Misho granitoid complex is continental margin and A- type post collision granitoides that, regarding negetive Nb anomalies belong to A₂.

---

The granite-gneiss body of  Abadchi area (vicinity of Zayandeh-Rud dam) is a part of Sanandaj-Sirjan tectonic zone. The mineralogical composition of the granite- gneisses contains quartz, K-feldspar, plagioclase, biotite and muscovite and minor minerals of opaque, zircon, amphibole and allanite. The granite-gneiss rocks have been influenced by deformation dynamics and weakly Na-metazomatism. Geochemically, these rocks are calcic to calc-alkali, ferroan to magnesian, peraluminous to slightly metaluminous and are A to I-type granitoid. On the bases of chondrite-normalized REE diagram, they show a relatively enrichment in LREES rather than HREES with negative Eu anomalies. On primitive-mantle normalized spider diagrams, the rocks display relatively enrichment in LILE and LREE rather than HFSE which represent the magmatic rocks depending on arc and collision setting. This granite-gneiss is formed in post-collisional tectonic setting.