Hossein Azizi

University of Kurdistan | UoK · Department of Mining Engineering

The meta-sedimentary rocks from the North Shahrekord metamorphic Complex (NSMC) comprise mica schists, paragneisses, quartz-feldspathic schists, and marbles. Detrital zircons from the para- gneisses yield ages of ca. 2811–507 Ma with most of the dated grains belonging to the Late Neoproterozoic to Cambrian, suggesting a maximum depositional age of...

There are a few intrusive bodies in the central Sanandaj-Sirjan Zone (C-SaSZ), which is parallel to the Zagros suture zone, in western Iran. The Alvand batholith in the Hamedan area is one of these bodies and consists of rock types with large variation, in particular, two-mica garnet-bearing granite with an S-type signature. Zircon U– Pb dating giv...

The Bulfat Igneous Complex comprises the Bulfat and Walash groups and is situated in the Zagros Suture Zone, in the junction of Arabian and Eurasian plates. Zircon U-Pb data indicat an age of 63.7 ± 1.5 Ma for the trondhjemite rocks within the Bulfat group. Walash group is primarily composed of basalt to andesite rocks, interbedded with sedimentary...

The Charco Rico prospective comprises a segment of the Sierra de Majé massif in Central Panama, an intrusive complex constructed during a lull in volcanic activity between 40 and 16 Ma at the 75-0 Ma Central American Volcanic arc system (CAVAS). Charco Rico represents an intermediate suite (55-65 wt% SiO2) but with inclusion of related Majé intrusi...

In Nasim deposit, mineralization has been done in conglomerate unit as a particular horizon. This unit is composed of volcanic fragments with carbonate and volcanic cements. Chalcocite is the most important and main sulphide mineral in the study area. Alteration can be divided into pre-mineralization and syn-mineralization stages. Pre-mineralizatio...

Several swarms of parallel E–W dikes cuts late Neoproterozoic- to early Paleozoic (540 Ma) basement in the Biarjmand area, NE Iran. The microgabbroic to doleritic dike are several hundred meters long and 0.5 to 3 meters wide. U–Pb dating of their zircon grains yields a crystallization age of 46.0 ± 7.1 Ma for the dike swarms. The dikes have SiO2 co...

The Siah-Kamar porphyry Mo deposit (SKD) is located at the north-western termination of the Urumieh-Dokhtar magmatic arc and it is the only known porphyry Mo ore reserve in Iran. The SKD formed in two main mineralisation stages, at ~ 33-32 Ma (late-stage, disseminated) and ~29-28 Ma (late-stage, high-grade), within a context of a long-lived magmati...

Broadly similar Early‐ late Middle Jurassic stratigraphic sequences including bimodal igneous rocks of the Sanandaj Sirjan Zone of Iran and the Sakarya Zone of Turkey suggest that these formed in a common tectonic setting in an extensional basin that evolved from a terrestrial magmatic rift to a marine shelf and passive continental margin. Whole‐ro...

Indirect calculation of magma crystallization temperatures is an important subject for geologists to know the petrogenesis of igneous rocks. During magma evolution from generation to crystallization, several processes control the behavior of elements. In this research, we obtained two new methods for the thermometry of magma by using high field str...

Upper Cretaceous Sanandaj (UCS) units (K8–K12) in the northern Sanandaj-Sirjan Zone, west Iran, which consists of ~2,000 meters of shale, sandstone, limestone, conglomerate, and pyroclastic rocks, with interbedded basalticandesitic lava. The Rb–Sr whole-rocks isochron for nine shale samples shows an age of 125 ± 39 Ma with an initial 87Sr/86Sr = 0....

The basement felsic igneous rocks associated with the continental tectonic zones of Iran are key elements that contain a well-preserved geological record of the protracted evolutionary history of the North Gondwana margin within the Ediacaran–Cambrian timespan. Two distinct Ediacaran–Cambrian magmatic pulses are recognized in the North Shahrekord M...

Zircon is a stable mineral during post crystallization processes and preserves characters of magmatic events. Zircon morphology can give some information about temperature, nature, and the source of the magma. A study of the zircon morphology of Cretaceous granitoids and acidic volcanics from the southeast Saqqez area reveals that most of the cryst...

A large number of polymetallic deposits exist in the Takab-Baneh area, NW Iran. Different methods such as minimum noise fraction (MNF), pixel purity index (PPI), n-D visualization, mixture tuned matched filtering (MTMF), relative absorption band depth (RBD), band ratio (BR), and principal component analysis (PCA) were used for extraction of alterat...

The metamorphosed Sadegh‐Abad granite from the north Shahrekord Metamorphic Complex (NSMC) of Sanandaj‐Sirjan Zone in west Iran shows evidence of ductile deformation. The augen to banded mylonitic granite (orthogneiss) involves sharp contacts with other rock units, including high‐grade metamorphic rocks, such as eclogite, amphibolite, and garnet am...

The Late Neoproterozoic basement is exposed in the Mahabad area of northwest Iran, and it is classified into three main groups. The first is metamorphic rocks that include gneiss, schist, phyllite, and slate. The second is sedimentary rocks, which comprise shale, sandstone, and dolomite and the third is igneous rocks including granite, rhyolite, fe...

There are discontinuous outcrops of volcanic rocks in the West Azarbaijan province and in the north of Maku city. These volcanic complex were bimodal and compose of acidic and basic lava and pyroclastic rocks. Mineral chemistry studies show that clinopyroxenes in the studied rocks are diopside. These pyroxenes have a high magnesium number (0.87 to...

Late Neoproterozoic–Early Paleozoic basement in Iran mainly comprises granites and mafic rocks locally affected by high-grade metamorphism. In this contribution, we collate whole rock chemical data for more than 600 samples; Sr–Nd isotope data for 200 samples; and zircon U-Pb ages of > 2500 grains. On the basis of zircon U-Pb ages, Iranian basement...

Ediacaran-early Cambrian magmatic rocks from the Ardakan region of central Iran include deformed granites from deformed granitic plutons and dolerites from doleritic sills. The granites contain zircon grains with U-Pb ages of 552 to 550 Ma, and dolerites have a zircon U-Pb age of 528 Ma. These granites are high K calc-alkaline in nature and have va...

Late Neoproterozoic basement of the Soursat complex to the southeast of Shahin-Dej, NW Iran, spans an area wider than 100 km² and is cut by Paleogene monzonite and granodiorite bodies. Zircon U-Pb dating yields monzonite and granodiorite crystallization ages of 54.7 ± 3.8 Ma and 57.7 ± 2.9 Ma, respectively. The monzonite group has relatively high M...

The Zarin granitic body is located in the eastern part of the Yazd Block in the Central Iran microcontinent. The granite has variable granular to mylonitic textures. New zircon U-Pb dating shows that the granitic rocks crys- tallized at 535–530 Ma. The pluton has high SiO2 abundances (72.1–77.5 wt%), K2O (4.4–6.3 wt%) and low MgO (0.2–0.7 wt%) cont...

Ebrahim-Attar granitic pegmatite, which is distributed in southwest Ghorveh, western Iran, is strongly peraluminous and contains minor beryl crystals. Pale-green to white beryl grains are crystallized in the rim and central parts of the granite body. The beryl grains are characterized by low contents of alkali oxides (Na2O = 0.24–0.41 wt.%, K2O = 0...

The Cadomian belt (ca. 600–500 Ma) extends from North America through Europe to Iran (Figure 1). It is characterized mainly by eroded, metamorphosed, and deformed magmatic arcs and back-arc basins developed along the northern margin of Greater Gondwana or Pannotia during Late Ediacaran to Early Cambrian time (e.g. Murphy et al. 2002; Stern 2008; Li...

Late Miocene volcanic rocks host the Sari Gunay epithermal gold deposit in NW Iran. These rocks are located within the Hamedan-Tabriz volcanic belt and occupy the northwestern part of the Sanandaj-Sirjan zone (SaSZ). The volcanic rocks span in composition from latite to dacite and rhyolite. Plagioclase, hornblende, biotite and quartz are the main p...

A wide part of the Central Iranian and Alborz zones have affected by an extensional tectonic regime in the lower Paleozoic, especially Silurian period. Due to the some clear relation of the lithological exposes, same ages and composition we have compared early Paleozoic basaltic rocks in the two key area such as Maku in the West and Soltan Maidan i...

The Marivan granitoid body of the northern Sanandaj–Sirjan Zone (N-SaSZ) of northwest Iran was emplaced into Cretaceous sediments, and is associated with minor amounts of iron skarn-type mineralization along the contact between the intrusion and surrounding country rocks. The granitoids within the intrusion include (hornblende-rich) diorite, granod...

The Boein-Miandasht Complex (BMC) in the central part of the Sanandaj-Sirjan Zone, western Iran, is composed of metamorphic rocks, and gabbro, gabbro-diorite, and granite intrusions, in which co-magmatic mingling structures are commonly found. Zircon U-Pb ages demonstrate that crystallization of the granitic rocks occurred during the Late Jurassic...

Miocene magmatic rocks are exposed as lava flows (OKV-group), subvolcanic rocks (SRG-group), and as lavas interbedded with shallow-basin sedimentary layers (TVN-group) in the Takab area, NW Iran. Zircon U-Pb dating yields ages of 18 to 15 Ma. Whole-rock chemistry shows that most of the Early Miocene magmatic rocks are andesite with subordinate daci...

There are Discontinuous outcrops of volcanic rocks in the northern regions of Maku. The volcanic rocks were metamorphosed in the green schist facies. These volcanic complex were bimodal and compose of acidic and basic lava and pyroclastic rocks. The lava of this unit covers the Cambrian and equivalent of Lashkarak rock units and is progressively co...

The Qolqoleh gold deposit is located in the northern part of the Sanandaj-Sirjan Zone (SaSZ), northwest Iran. The main host rocks include mylonitic granite and chlorite schist. Four generations of Au-bearing sulfides have been identified and are referred to as Py1 to Py4. LA-ICP-MS elemental maps and spot analyses of gold and other trace elements i...

In northwestern Iran, magmatic activity occurred during three main intervals: The Cretaceous, Eocene, and Miocene-Quaternary. The first two phases of magmatic activity are more consistent with arc-type magmatism on an active continental margin; whereas the last phase, which has calc-alkaline and alkaline affinities, shows more similarity to postcol...

Dear Colleagues, Rare earth elements, which consist of 15 elements from La to Lu, are powerful research tools in the earth sciences (especially in the field of geochemistry). In particular, since Dr. Akimasa Masuda, a professor at the University of Tokyo, Japan, devised an interpretive method to understand the geochemical significance of rare eart...

Garnets show wide ranges of chemical compositions and are key minerals for reconstructing the thermodynamic evolution of metamorphic terranes. The properties of garnets – including Mohs hardness ~7, lack of cleavage, vitreous luster and multiple colors – also makes them useful as semi-gemstones. Garnets are widespread accessory minerals in igneous...

A few gold deposits occur in northwest Iran which are hosted by mylonitic granitoids and phyllonite. New UPb ages yield ages of 350–311 Ma for the mylonitic granitoid and 354–348 Ma for the phyllonite, which indicate Carboniferous magmatic activity in northwest Iran. The host granitoid and phyllonite have high contents of Zr (212, 246 ppm), and Y (...

The Golshekanan granitoid body is situated in the central part of the Urumieh–Dokhtar magmatic arc (UDMA) in central Iran, and includes granite and granodiorite with minor monzonite and diorite. Zircon U–Pb dating yields a late Eocene (Priabonian) crystallization age of 37.6 ± 0.2 Ma. The body is calc-alkaline and metaluminous to weakly peraluminou...

Apatite with the general formula (Ca 5 (PO 4) 3 (F,Cl,OH) is a main mineral of calcium phosphate and is key mineral to understand the geochemistry and petrogenesis of parental magma. In this research, we focus on geochemistry of apatite grains from the Ghareh Bagh mica mine, northwest Iran, to identify the source of apatite and the genetic relation...

Iran is located in the middle part of the Alpine-Himalayan orogenic belt and is divided into several zones and subzones based on geological structure. The Sanandaj-Sirjan Zone (SaSZ) is one of the most dynamic structural zones of Iran. The SaSZ is situated between Central Iran microcontinent and Zagros orogenic belt and is divided into three main p...

Cretaceous acidic rocks of the south Saqqez are located in north of the Sanandaj – Sirjan Zone. The effect of deformation could be trace on most of the acidic rocks, gradual changes from cataclasitic to mylonitic structures recorded from the southwest to the northeast of the area. Deformation structures such as shear bands, sigmoidal porphyroclasts...

The Saqqez granitoid is located in the Northern Sanandaj-Sirjan Zone in a large area of 80 km2. The granitoids present abundant rounded enclaves, varies in size from 1 cm to 25 cm. The enclaves are scattered in entire bulk of intrusion but their distribution is not uniform. A hybrid zone that shows gradual change in color from whit to dark is also...

We address the growing controversy about the tectonic setting in which Jurassic magmatism of Iran occurred: arc or continental rift. In the Ghorveh area of the northern Sanandaj Sirjan zone (SaSZ), the Ghalayan metabasites are interlayered with marble and schist and locally cut by acidic dikes. Zircon U-Pb dating of the metabasitic rocks shows that...

Sanandaj-Sirjan Zone (SaSZ) is one of the most dynamic structural zones of Iran, which is divided into three main parts: Northern, Central and Southern. The northern SaSZ has been affected by deformation due to fault activities near the Zagros suture zone, and mylonitic structures have overprinted these rocks and was affected by three episodes of m...

The 320 Ma Ghareh Bagh mica mine is the only active mica mine in northwest Iran, and hosts Mg-bearing biotite (phlogopite) with apatite, epidote, and calcite. Chemical investigation of apatite infers the high abundances of the rare earth elements (REEs up to 5619 ppm), higher ratios of the LREE/HREE ((La/Yb)N = 28.5–36.7)) and high content of Y (23...

The studied granitic gneiss bodies of the Golpayegan metamorphic complex, located in the central part of the Sanandaj Sirjan Zone (SaSZ), in western Iran. Zircon U-Pb dating of two samples shows that the crystallization of the protolith occurred at 557 ± 12 Ma in the Late Neoproterozoic (Ediacaran), broadly coeval to the Neoproterozoic-Early Palaeo...

This special issue brings together diverse and comprehensive studies on the petrography, geochemistry, geochronology and tectonic setting of Mesozoic-Cenozoic magmatism in Iran, with the aim to better understand its tectono-magmatic and geodynamic evolution.

The studied granitic gneiss bodies of the Golpayegan metamorphic complex, located in the central part of the Sanandaj Sirjan Zone (SaSZ), in western Iran. Zircon U-Pb dating of two samples shows that the crystallization of the protolith occurred at 557 ± 12 Ma in the Late Neoproterozoic (Ediacaran), broadly coeval to the Neoproterozoic-Early Palaeo...

The study area is located in the southern part of the Irankhah sheet, which based on the structural zone of Iran belongs to the Sanandaj-Sirjan zone. In this research, six short wave infrared bands (SWIR) were used for the detection of the alteration zones. False-color composition, band ratio, selective principal component analysis, MTMF, and spect...

Abstract In this research, ASTER data was used to identify alteration zones, carbonate, and silicic rocks. False-color composition (FCC), band ratio, principal component analysis (PCA), minimum noise fraction, MTMF, maximum likelihood (MLL) were used for data processing. The result of this study identifies, phyllic, argillic, propylitic, alunite al...

The economically significant Baba Ali iron ore deposit, is located in the Sanandaj-Sirjan zone, western Iran, is associated with diorite. The mineralization trends in a ENE-WSW direction with thickness that varies from 30 m up to 50 m and a length of about 250 m. The main mineral assemblages are massive magnetite, epidote, actinolite, tourmaline, q...

The Baneh-Saqqez zone is part of the Sanandaj-Sirjan Zone, northwest of Iran. Generally, this zone is recognized as a gold bearing zone, and the mineralization in it is controlled by faults. In this research, structural lineaments were extracted using Landsat 8 (OLI) image, in which the main lineaments trend NE-SW, EW and NW-SE. Spatial distributio...

Kuh-Sefid Tutak complex is a part of the southern Sanandaj-Sirjan metamorphic zone with the Northwest-Southeast trend and consists of sequences that have been undergone greenschist to lower amphibolite facies metamorphism. Augen gneisses, as one of the most important of metamorphic units in the complex, are characterized by mineralogy composition o...

Kuh-Sefid Tutak complex is a part of the southern Sanandaj-Sirjan metamorphic zone with the Northwest- Southeast trend and consists of sequences that have been undergone greenschist to lower amphibolite facies metamorphism. Augen gneisses, as one of the most important of metamorphic units in the complex, are characterized by mineralogy composition...

Intrusive bodies with a wide-ranging geology are distributed in the central part of the Sanandaj-Sirjan zone (C–SaSZ) in southern Ghorveh, western Iran. The zircon U–Pb ages were dated at 154–146 Ma, and were characterized by low ⁸⁷Sr/⁸⁷Sr(i) ratios and high ¹⁴³Nd/¹⁴⁴Nd(i) ratios that ranged from 0.7035 to 0.7061 and 0.51245 to 0.51271, respectivel...

The Eocene-Miocene Mianeh-Hashtroud igneous district in NW Iran is part of the Turkish-Caucasus-Iranian collision zone, a key region to decipher the assembly and differentiation of Gondwana-derived terranes along the Alpine-Himalayan convergence zone. Major inherited tectonic structures control in space and time the Mesozoic-Cenozoic transition fro...

The Ghaleh-Dezh metagranites in the northern Sanandaj–Sirjan Zone (SaSZ) in western Iran are found in a 0.5 km long by 0.3 km wide unit emplaced within the older Precambrian basement. New zircon U–Pb ages confirm that crystallization and emplacement of the protolith of the metagranites occurred at 312 ± 10 Ma and 298 ± 17 Ma in the Upper Carbonifer...

Late Eocene – Oligocene volcanic rocks in the eastern Saveh region of the Urumieh-Dokhtar magmatic arc (UDMA) are representative of Paleogene magmatic activity in Iran. They show a wide range of silica-undersaturated to silica-oversaturated compositions, from basalt-trachy basalt and tephri-phonolite to trachyte-latite. Whole rock chemical composit...

Understanding the anatomy of magma plumbing systems of active volcanoes is essential not only for unraveling magma dynamics and eruptive behaviors but also to define the geometry, depth, and temperature of the heat sources for geothermal exploration. The Pleistocene–Holocene Los Humeros volcanic complex is part of the eastern Trans-Mexican Volcanic...

Various granitoid bodies from the Neoproterozoic to Late Cenozoic intruded in the Sanandaj-Sirjan zone (SaSZ) in western Iran. In this research, we have compiled data for rare earth elements (REEs) concentration in the granitoid bodies which we have collected in the northern part of the SaSZ in this decade. The abundances of ∑REEs in a part of the...

The late Neoproterozoic (Ediacaran) igneous and metamorphic complex that constitutes the main part of the Precambrian basement in Iran is exposed in southwestern Saqqez in the northern Sanandaj-Sirjan zone (SaSZ), which is called the Ediacaran complex in this study. New zircon U–Pb dating from five samples shows that the crystallization of the main...

Introduction: The purpose of this study is to apply remote sensing technique to extract lineaments in the Saqqez-Baneh shear zone. In this study, lineaments were extracted in three manual, automatic and semi-automatic methods and their density and direction as well as their relationship with gold mineralization were investigated. Materials and meth...

Late Paleocene adakitic granitoids are rare in Iran except in the northwest. We focused on the adakitic Saqqez-Takab pluton, which occupies an area of ~600 km². New U-Pb zircon dating yield crystallization ages of 58–56 Ma (Thanetian). These granitoids comprises granite, quartz monzonite and monzogranite with granular to mylonitic textures. They ha...

The Saveh magmatic complex is a composite intrusion of diorite to tonalite. It is part of the Urumieh-Dokhtar magmatic arc in central Iran. Zircon U\ \Pb dating indicates that emplacement and cooling occurred 37-40 Ma ago in late Eocene (Bartonian) time. Saveh igneous rocks define a continuous mafic-felsic continuum in terms of SiO 2 (55.4-70.8 wt%...

Understanding the anatomy of magma plumbing systems of active volcanoes is essential not only for unraveling magma dynamics and eruptive behaviors, but also to define the geometry, depth and temperature of the heat sources for geothermal exploration. The Pleistocene-Holocene Los Humeros volcanic complex is part of the Eastern Trans-Mexican Volcanic...

The Siah-Kamar Mo deposit (SKMD) is located at the northwestern termination of the Urumieh-Dokhtar magmatic zone and it is the only porphyry Mo ore reserve in Iran. The exploration program documented a 39.2 Mt proved reserves @ 539 ppm Mo and 66.4 Mt probable reserves @ 266 ppm Mo. In this study, field and petrographic investigations, integrated wi...

The Dorojin granitoid at the northeastern Isfahan is located in the central Urumieh-Dokhtar zone and within the volcano-sedimentary complex. The Dorojin iron deposit is the one of the several ore deposits that Dorojin granitoid body is caused in its surrounding rocks. According to microscopic evidences, mineral assemblage of wollastonite, garnet, p...

Jurassic igneous bodies of the Sanandaj‐Sirjan zone (SaSZ) in SW Iran are generally considered as a magmatic arc but critical evaluation of modern geochronology, geochemistry, and radiogenic isotopes challenges this conclusion. There is no evidence for sustained igneous activity along the ~1200 km long SaSZ, as expected for a convergent plate margi...

The Boein–Miandasht Complex (BMC) is a part of the Sanandaj–Sirjan metamorphic basement and is cut by gabbroic to granitoid bodies. These intrusive bodies comprise gabbro, gabbro–diorite associated with fine-grained, in part porphyritic leucocratic granitoids. Zircon U–Pb dating of representative gabbro–diorite samples yielded ages of 166.4 ± 1.8 M...

Soheyle-Pakuh granitoid rocks, with a variety of quartz diorite, quartz monzodiorite, granodiorite, tonalite, and granite, have been emplaced into the Tertiary volcanic rocks in the Urumieh-Dokhtar magmatic arc in central Iran. Zircon U–Pb dating yields an age of 39.63 ± 0.93 Ma for the crystallization of this body. Whole-rock compositions show tha...

The Tutak metamorphic complex is located in the southeast of HP-LT Sanandaj-Sirjan metamorphic belt, 300 km north-east of Shiraz. This complex include metamorphosed sedimentary and magmatic rocks that mainly consisting of granite-gneiss, dark micaschists, calcareous schist, amphibolite. The amphibolites have inequicrystal and inequigranular and lep...

The Sanandaj-Sirjan Zone (SaSZ) located in the west of Iran is an active continental margin and is situated between the Zagros Folding Belt (ZFB) and Urumieh-Dokhtar Magmatic Arc (UDMA). The SaSZ was formed within the Neo-Tethys Ocean and thrusted over the Arabian Plate in the Late Cretaceous obduction followed by collision during the Miocene-Plioc...

Kuh-Sefid granite-gneiss of Tutak is part of the Sanandaj-Sirjan metamorphic zone that is located in 30 Km from east of Bavanat. Based on field and petrography studies, the granite-gneiss body are consist of quartz, k-feldspar, plagioclase, biotite, muscovite, titanite, chlorite (pennine) and apatite. Some evidences such as bent twins, undulose ext...

Molybdenum porphyry-type deposits are mainly associated with subduction-related settings, such as volcano-plutonic magmatic arcs, back-arcs and continental collision orogens (Westra and Keith 1981; Taylor et al. 2012). The majority of the porphyry Cu–(Mo, Au) deposits in Iran occur along the Cenozoic Urumieh-Dokhtar magmatic zone (Aghazadeh et al....

Deposits of semi-gemstones tourmaline, beryl, and garnet associated with Jurassic granites are found in the northern Sanandaj-Sirjan Zone (SaSZ) of western Iran, defining a belt that can be traced for about 400 km. Granitic magmas strongly interacted with or were derived from melts of continental crust and/or sediments. Based on morphologies, size,...

Deposits of semi-gemstones tourmaline, beryl, and garnet associated with Jurassic granites are found in the northern Sanandaj-Sirjan Zone (SaSZ) of western Iran, defining a belt that can be traced for about 400 km. Granitic magmas strongly interacted with or were derived from melts of continental crust and/or sediments. Based on morphologies, size,...

Paleozoic and Mesozoic granitoids are widely distributed in the Sanandaj-Sirjan Zone (SaSZ) in the western Iran. The SaSZ is situated between the Zagros Fault in the west and the Urumieh-Dokhtar magmatic arc (UDMA) in the east (e.g. Stocklin, 1968). The SaSZ can be distinctly divided into northern and southern sections (Eftekharnejhad, 1981; Ghasem...

The Saveh magmatic complex is a composite intrusion of diorite to tonalite. It is part of the Urumieh-Dokhtar magmatic arc in central Iran. Zircon U-Pb dating indicates that emplacement and cooling occurred 37–40 Ma ago in late Eocene (Bartonian) time. Saveh igneous rocks define a continuous mafic-felsic continuum in terms of SiO2 (55.4–70.8 wt.%),...

The Saveh magmatic complex is a composite intrusion of diorite to tonalite. It is part of the Urumieh-Dokhtar magmatic arc in central Iran. Zircon U-Pb dating indicates that emplacement and cooling occurred 37–40 Ma ago in late Eocene (Bartonian) time. Saveh igneous rocks define a continuous mafic-felsic continuum in terms of SiO2 (55.4–70.8 wt.%),...

The Saveh magmatic complex is a composite intrusion of diorite to tonalite. It is part of the Urumieh-Dokhtar magmatic arc in central Iran. Zircon U-Pb dating indicates that emplacement and cooling occurred 37–40 Ma ago in late Eocene (Bartonian) time. Saveh igneous rocks define a continuous mafic-felsic continuum in terms of SiO2 (55.4–70.8 wt.%),...

The Saveh magmatic complex is a composite intrusion of diorite to tonalite. It is part of the Urumieh-Dokhtar magmatic arc in central Iran. Zircon U\ \Pb dating indicates that emplacement and cooling occurred 37-40 Ma ago in late Eocene (Bartonian) time. Saveh igneous rocks define a continuous mafic-felsic continuum in terms of SiO 2 (55.4-70.8 wt%...

The Saveh magmatic complex is a composite intrusion of diorite to tonalite. It is part of the Urumieh-Dokhtar magmatic arc in central Iran. Zircon U\ \Pb dating indicates that emplacement and cooling occurred 37-40 Ma ago in late Eocene (Bartonian) time. Saveh igneous rocks define a continuous mafic-felsic continuum in terms of SiO 2 (55.4-70.8 wt%...

The granitic intrusives in southwest Saqqez are located in the northern Sanandaj Sirjan zone. These granites can be divided into mesocratic and leucocratic granites. The external morphology and internal structures of zircon from these granites have been investigated employing the classic Pupin method supplemented by electron microscope analysis. Th...