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The Hormuz Formation is a sequence of lithologically various evaporitic–volcanic rocks in salt domes where the volcanic rocks are dominantly acidic, generally with less than one third basic volcanics. It was formed in the Late Proterozoic (640–620 Ma)/Neoproterozoic–Early Cambrian, as a result of sub-basin rifting in the northern part of the Arabian plate, throughout most of the Persian Gulf Basin and the equivalent Ara salt in Oman. Diabase is the most common basic rock of the Hormuz Formation. In the field, the studied diabases are seen as stock-like outcrops and dykes which are extremely altered. These rocks contain plagioclase, pyroxene and less olivine as primary minerals which are transformed to various secondary minerals and the diabases primary textures are ophitic, porphyritic and microlitic flow. 22 samples of these diabases from 7 salt domes of southern Iran were analyzed by XRF and ICP-MS methods and then studied. On geochemical diagrams, these rocks plot in the field of tholeiitic basalts and mid-oceanic ridge basalts (MORB). According to values of major and rare elements, these diabases have undergone fractional crystallization within a magma chamber or en route to the surface. Due to REE pattern and values of these samples, the parental rock of the magma which produced them has experienced intermediate degrees of partial melting and these diabases have undergone low degrees of crustal contamination during magmatic evolution. According to values of rare elements ratios, they were probably generated from a depleted to transitional mantle source derived from a garnet-free, spinel peridotite source region. Therefore, the Hormuz Formation diabases are products of the Neoproterozoic to Early Cambrian rifting of the northern part of the Arabian plate. They have similar chemical compositions as Archean tholeiitic basalts and show all the features of a greenstone but whether or not they are on a Phanerozoic greenstone belt, needs further tectonic studies.

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Part of the Ultramafic Sorkh-Band complex along the Kahnuj, Roudan, Minab Ophiolite belts Hormozgan Province at Nazdasht area, contain harzburgaite, dunite, and serpentinit (with dominance harzburgaite). The major mineral in these rocks included olivine, orthopyroxenes and minor mineral such as Spinel. Mesh and granoblastic texture is dominance in these rocks and tectonic pressure effect can be seen as kink band and undulose extinction within the minerals. Results from Electron Microprobe analysis of minerals show olivine with (Fa 90.18-93.6) forsterite composition and rich of magnesium that belong to Alpine type. Also orthopyroxenes show (En 32.8-95.2) enstatite composition and spinel Cr^# (53.9-71.02) have chrome. The harzburgites have high Mg^# (97.78-84.65) but are poor of Al₂O₃ (0.71-0.34) and Ca (0.69-0.45), which can be said these rocks are refractory waste that have been remain after the partial melting of more than 25% percent. Low amount of Al and Ti (0.01-0.04) in spinel existence at the Nazdasht harzburgites consider to be characteristic of supra-subduction zone peridotites.

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The Mamzar granitoid pluton is located in the Kerman Province and structurally in southeast of Urumieh-Dokhtar magmatic zone. Based on petrographic studies, the granitoid consist of four rock type of diorite, tonalite, granodiorite and monzogranite. They are mainly composed of plagioclase (andesine), alkali-feldspar (orthoclase), quartz, amphibole (magnesiohornblende), biotite and clinopyroxene. Mineral chemistry of plagioclase indicate that their composition are andesine with An_33-47 and the amphibole (calcic) have magnesiohornblende compositions that is feature of I-type granite. The biotites with Fe/ (Fe+Mg)>0.33 are magnesio-biotites. Based on TiO₂ versus Al₂O₃ diagram, composition of amphiboles indicate crust and mantle mixing in the formation of the Mamzar granitoid magma. Application of different barometers and thermometers such as Al-in-hornblende, plagioclase-amphibole pair exhibit an average pressure of 1.14 kbar and temperatures of 660-730 °C for the intrusion. The mineral chemistry of the biotites and amphiboles indicate that this granitoid pluton is calc-alkaline and formed at the depth of less than 8 km.

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Hormuz series in Zendan salt dome, Neoprotozoic-Early Cambrian rocks is located near Bandar-e-Lengeh in western Hormozgan Province. In this salt dome, iron calcic skarns are present near the basic igneous bodies that have copper hydrothermal deposits. Carbonate sedimentary sequences, carbonate tuffs and igneous rocks are the host rocks of these skarns. The calcsilicates in the endoskarn include grandite garnets, feldspars, clinozoicite/epidotes, actinolite, wollastonite and vesuvanite. The calcsilicates in exoskarns are garnets and is mostly andradite, epidote, actinolite and wollastonite. Based on microprobe analysis, the type of garnet within skarn varies from And₃₀Gross₇₀ to And₁₀₀Gross₀. Based on crystal chemistry study, the elements such as Zn, Mn, Cu in exoskarns and endoskarns have a systematicaly distribution. Fluid inclusions study of the andradite mineral have indicated that Zendan skarns are formed at temperatures of 600 to 650°C.
 

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The Late Cretaceous basaltic magmatism in northern part of the Urumieh-Dokhtar Magmatic Arc (UDMA) includes subalkaline (transitional) basalts and basaltic andesites; which are formed in associated with various pyroclastic and sedimentary rocks. These rocks are charactrized by similar geochemical patterns including enrichment in light rare earth elements (LREEs), large ion lithophile elements (LILEs),  and depletion in high field strength elements (HFSEs; e.g., Nb, Ta, Ti). These geochemical evidence indicates magmatism related to volcanic arcs and subduction setting. In addition, the nearly flat heavy rare earth element (HREE) patterns are similar to that of the oceanic island basalt (OIB). These mafic magmatic rocks are characterized by a mantle dominated composition, evidenced by (⁸⁷Sr/⁸⁶Sr)i ratios of 0.70404–0.70414, and uniform positiveεNd(t) values of 1.00–4.14. The trace-element and isotopic modelling indicate that the studied basaltic rocks resulted from partial melting of metasomatized lithospheric mantle wedge at the garnet–spinel stability depth in transitional zone. The magmatism in the study area more likely occurred in an incipient volcanic arc setting due to asthenospheric upwelling in response to lithospheric extension during slab retreat 80 million years ago.

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The Shafarud Metamorphic Complex is located in the northwestern part of Iran in the Alborz-Talesh Mountain range. Paleozoic metamorphism (Carboniferous-Permian) are the oldest rocks of this region. The eclogites of the Shafarud Metamorphic Complex are exposed as lenses of several meters in size along with serpentinite masses in the basal parts. The mineral assemblage of the eclogites includes garnet, pyroxene, amphibole, white mica, epidote, plagioclase, chlorite, quartz and sphene. SEM images and the results of electron probe micro-analyzer (EPMA) show the growth chemical zoning in garnet porphyroblasts. According to the calculation of the temperature-pressure pattern, using Jacobian transformation, the core and the rim of garnets have been formed respectively at temperature-pressure 600 ºC -18.2 Kbar (eclogite facies, ~60 Km) and 550 ºC- 7.5 Kbar (green schist facies, ~25 Km). According to the results of this study, the structural pattern of the eclogites of the Shafarud Metamorphic Complex is similar to the alpine type, during which the process of uplift and pressure reduction occurred in almost isothermal conditions due to a rapid uplift.