University of IsfahanPetrological Journal2228-521031120121121Autumn 1391 Appendix faAutumn 1391 Appendix fa016111FAJournal Article20160614https://ijp.ui.ac.ir/article_16111_9b07cc5522f01d498523c367bfe11082.pdfUniversity of IsfahanPetrological Journal2228-521031120121121Metamorphism of mantle peridotites in Jandaq ophiolite (Central Iran)Metamorphism of mantle peridotites in Jandaq ophiolite (Central Iran)11816110FAGhodratTorabiگروه زمین شناسی دانشگاه اصفهانJournal Article20160614Jandaq ophiolite is one of the old ophiolites in Iran belonging to Proterozoic and Paleozoic, and subjected to different phases of metamorphism. The studied ophiolite is covered by Paleozoic schists and marbles and the mantle peridotite is one of the most predominant rock unit of the Jandaq ophiolite. The presence of metamorphic olivine and metamorphic orthopyroxene, tremolite formation, talc, anthophyllite, chlorite and antigorite in these peridotites reveal their metamorphism in amphibolite facies. Clinopyroxenes and Cr-spinels are resistant against metamorphism and are relicts of preliminary igneous mineralogy. The results of metamorphism study on the mantle peridotites, are in consistent with petrography and geothermobarometry of plagioclase-amphibole data in Jandaq ophiolite amphibolites.Jandaq ophiolite is one of the old ophiolites in Iran belonging to Proterozoic and Paleozoic, and subjected to different phases of metamorphism. The studied ophiolite is covered by Paleozoic schists and marbles and the mantle peridotite is one of the most predominant rock unit of the Jandaq ophiolite. The presence of metamorphic olivine and metamorphic orthopyroxene, tremolite formation, talc, anthophyllite, chlorite and antigorite in these peridotites reveal their metamorphism in amphibolite facies. Clinopyroxenes and Cr-spinels are resistant against metamorphism and are relicts of preliminary igneous mineralogy. The results of metamorphism study on the mantle peridotites, are in consistent with petrography and geothermobarometry of plagioclase-amphibole data in Jandaq ophiolite amphibolites.https://ijp.ui.ac.ir/article_16110_3a4a51660ea9d254fe70746e06c18619.pdfUniversity of IsfahanPetrological Journal2228-521031120121121Investigation of the origin of Heneshk Hematitic iron deposit, Fars province using petrological, mineralogical and geochemical dataInvestigation of the origin of Heneshk Hematitic iron deposit, Fars province using petrological, mineralogical and geochemical data193816105FAMohhamad AliRajabzadehShervinParvinZohrehMoosavi NasabRezaShamsipour DehkordiJournal Article20160614Heneshk iron deposit is located between Gushti and Heneshk villages at Safashahr, NW of Fars province. Iron mineralization occurred as massive and lenticular shapes with silica and barite veins within brownish, silicified Triassic dolomitic host. Hematite and goethite are the principal ore minerals with minor magnetite that were formed through replacement and rarely open space filling within the host. Low concentrations of P (Heneshk iron deposit is located between Gushti and Heneshk villages at Safashahr, NW of Fars province. Iron mineralization occurred as massive and lenticular shapes with silica and barite veins within brownish, silicified Triassic dolomitic host. Hematite and goethite are the principal ore minerals with minor magnetite that were formed through replacement and rarely open space filling within the host. Low concentrations of P (https://ijp.ui.ac.ir/article_16105_928aea15b81cb42bf9e62798ec1d6bf2.pdfUniversity of IsfahanPetrological Journal2228-521031120121121The study of minerals chemistry, thermobarometry and tectonic setting of plutonic rocks from Sarabi Tueyserkan area (Hamedan province)The study of minerals chemistry, thermobarometry and tectonic setting of plutonic rocks from Sarabi Tueyserkan area (Hamedan province)395816106FAAli AsgharSepahi Garooدانشگاه بوعلی سیناKazemBorzoeiSeddighehSalamiJournal Article20160614Sarabi area of Tueyserkan is located in Hamedan province which is a part of Sanandaj-Sirjan zone. Rocks of the area include igneous and metamorphic types in which the igneous rocks vary from gabbro to granite. The gabbros include olivine-gabbro, gabbro-norite, norite and gabbro. Considering different methods of thermometry for gabbros, the highest temperature belongs to olivine-gabbros which is about 1300 °C and the least temperature is about 950 °C for mafic rocks. Clinopyroxene-plagioclase barometry suggests nearly 6 Kbar pressure. Clinopyroxene, biotite and particularly amphibole were used to determine magma composition and tectonic setting. The results suggest a calc-alkaline to tholeiitic magma with approximately high oxygene fugacity during crystallization in a VAB tectonic setting.Sarabi area of Tueyserkan is located in Hamedan province which is a part of Sanandaj-Sirjan zone. Rocks of the area include igneous and metamorphic types in which the igneous rocks vary from gabbro to granite. The gabbros include olivine-gabbro, gabbro-norite, norite and gabbro. Considering different methods of thermometry for gabbros, the highest temperature belongs to olivine-gabbros which is about 1300 °C and the least temperature is about 950 °C for mafic rocks. Clinopyroxene-plagioclase barometry suggests nearly 6 Kbar pressure. Clinopyroxene, biotite and particularly amphibole were used to determine magma composition and tectonic setting. The results suggest a calc-alkaline to tholeiitic magma with approximately high oxygene fugacity during crystallization in a VAB tectonic setting.https://ijp.ui.ac.ir/article_16106_7382d8e67b555b0b8c5d198ecbf95842.pdfUniversity of IsfahanPetrological Journal2228-521031120121121Geochemistry of Ghareh Boltagh granitoid body, Buin-Miandasht (SE of Aligudarz)Geochemistry of Ghareh Boltagh granitoid body, Buin-Miandasht (SE of Aligudarz)597616109FANahidShabanian BoroujeniAlirezaDavoudian Dehkordiدانشگاه شهرکرد - دانشکده منابع طبیعی و علوم زمینFatemehPanahdarJournal Article20160614The Ghareh Boltagh granitic pluton, as a part of the magmatic-metamorphic complex of the north of Boein Miandasht, exposed in the southeastern of Aligoodarz and located in Sanandaj-Sirjan zone. The complex consists of granite, diorite and gabbro with metabasite rocks. Mineralogically, the granitic rocks are mainly composed of major minerals of quartz, alkali feldspar, plagioclase, and minor minerals of biotite, amphibole, epidote, zircon, sphene, apatite, tourmaline, allanite and opaque. The Ghareh Boltagh granitic pluton consists of high SiO2 (68.74-72.59 wt. %), K2O (4.5-5.01 wt. %) and Na2O (3.75-4.23 wt. %), and Fe2O3tot (2.2-3.78 wt. %). It shows metaluminous to slightly peraluminous nature. On the base of chondrite-normalized REE diagram, all of the samples invariably show a relatively enrichment in LREES rather than HREES with negative Eu anomalies. Their primitive-mantle normalized spider diagrams display negative Ba, Sr, P and Ti anomalies. The calculated zirconium saturation temperatures range from 799 to 848 °C. The studied rocks, geochemically, belong to the A2-type granites, generated in a post-collisional tectonic setting.The Ghareh Boltagh granitic pluton, as a part of the magmatic-metamorphic complex of the north of Boein Miandasht, exposed in the southeastern of Aligoodarz and located in Sanandaj-Sirjan zone. The complex consists of granite, diorite and gabbro with metabasite rocks. Mineralogically, the granitic rocks are mainly composed of major minerals of quartz, alkali feldspar, plagioclase, and minor minerals of biotite, amphibole, epidote, zircon, sphene, apatite, tourmaline, allanite and opaque. The Ghareh Boltagh granitic pluton consists of high SiO2 (68.74-72.59 wt. %), K2O (4.5-5.01 wt. %) and Na2O (3.75-4.23 wt. %), and Fe2O3tot (2.2-3.78 wt. %). It shows metaluminous to slightly peraluminous nature. On the base of chondrite-normalized REE diagram, all of the samples invariably show a relatively enrichment in LREES rather than HREES with negative Eu anomalies. Their primitive-mantle normalized spider diagrams display negative Ba, Sr, P and Ti anomalies. The calculated zirconium saturation temperatures range from 799 to 848 °C. The studied rocks, geochemically, belong to the A2-type granites, generated in a post-collisional tectonic setting.https://ijp.ui.ac.ir/article_16109_61d94e0dc37b6fca50aa186b67ca0d2c.pdfUniversity of IsfahanPetrological Journal2228-521031120121121Geochemistry, zircon U-Pb geochronology and Rb-Sr & Sm-Nd isotopes of Najmabad monzonitic rocks south of GhonabadGeochemistry, zircon U-Pb geochronology and Rb-Sr & Sm-Nd isotopes of Najmabad monzonitic rocks south of Ghonabad779616108FAMehrabMoradi NoghondarMohammad HassanKarimpourAzadehMalekzadeh Shafaroudi0000-0002-7373-561xG. LangFarmerCharlesSternJournal Article20160614Najmabad is located south of Ghonabad in the province of Khorasan Razavi. This area is situated in the northern part of Lut Block. Two types of granitoid, ilmenite series (Jurassic), and magnetite series (Tertiary) are recognized in the study area. The aim of this research is to find out the age and petrogenesis of granitoid (magnetite series). The result of U-Pb zircon age dating of monzonite is 39.9 Ma (Middle Eocene time). Chemically, Monzonitic rocks are meta-aluminous to moderately peraluminous. They are classified as the magnetite-series (I-Type granitoid). Based on enrichment of LREE relative to HREE, enrichment of LILE (K, Rb, Ba and Sr) and depletion of HFSE (Nb, Ti and Ta) monzonitic magma originated in subduction zone. The average of SiO2 (66.52%), Al2O3, (15.26%), MgO (1.13%), Na2O (4.7%), K2O/Na2O (0.31), as well as LREE enrichment , positive Eu, high Sr (492 ppm), high ratio of (La/Yb)N (>13.58), Y (Najmabad is located south of Ghonabad in the province of Khorasan Razavi. This area is situated in the northern part of Lut Block. Two types of granitoid, ilmenite series (Jurassic), and magnetite series (Tertiary) are recognized in the study area. The aim of this research is to find out the age and petrogenesis of granitoid (magnetite series). The result of U-Pb zircon age dating of monzonite is 39.9 Ma (Middle Eocene time). Chemically, Monzonitic rocks are meta-aluminous to moderately peraluminous. They are classified as the magnetite-series (I-Type granitoid). Based on enrichment of LREE relative to HREE, enrichment of LILE (K, Rb, Ba and Sr) and depletion of HFSE (Nb, Ti and Ta) monzonitic magma originated in subduction zone. The average of SiO2 (66.52%), Al2O3, (15.26%), MgO (1.13%), Na2O (4.7%), K2O/Na2O (0.31), as well as LREE enrichment , positive Eu, high Sr (492 ppm), high ratio of (La/Yb)N (>13.58), Y (https://ijp.ui.ac.ir/article_16108_2469a6ba1e4fdaa4e351b9b239fb15d9.pdfUniversity of IsfahanPetrological Journal2228-521031120121121Application of pyroxene chemistry for evaluation of temperature and pressure in the Kuh-e Dom intrusionApplication of pyroxene chemistry for evaluation of temperature and pressure in the Kuh-e Dom intrusion9711016104FAFatemehSarjoughianکردستان سنندج دانشگاه کردستانAliKananianJamshidAhmadianJournal Article20160614The Late Eocene Kuh-e-Dom intrusion located in the central part of Urumieh-Dokhtar magmatic belt, NE of Ardestan. The intrusion consists of gabbroic to granitic rocks, intruded by several acidic and basic dikes. The EMP analyses of gabbro pyroxenes show the occurrence of two types of pyroxene: orthopyroxene with hypersthene and ferro hypersthene composition and clinopyroxene with augite- diopside composition. The trachybasaltic dikes have clinopyroxene with augite to diopside composition. The compostion of the pyroxenes shows that these rocks have been crystallized in a subduction zone setting. The average crystallization temperature of pyroxenes in gabbros is about 1070°C, and it seems the clinopyroxenes crystallized in the lower temperature than orthopyroxenes. While the average crystallization temperature of pyroxenes in the basic dikes is evaluated to be around 1130°C. The estimated pressure for clinopyroxenes crystallization in the studied gabbros is lower than 2 kb and 2 to 5 kb for orthopyroxenes. These data indicate that clinopyroxenes have been formed in the depth lower than 7.7 km and the orthopyroxenes in depth of 10 km. The crystallization pressure of clinopyroxenes in the basic dikes studied is calculated in the range of 2.7 to 2.8 kb which is in accordance with their formation in the depth of 10 km.The Late Eocene Kuh-e-Dom intrusion located in the central part of Urumieh-Dokhtar magmatic belt, NE of Ardestan. The intrusion consists of gabbroic to granitic rocks, intruded by several acidic and basic dikes. The EMP analyses of gabbro pyroxenes show the occurrence of two types of pyroxene: orthopyroxene with hypersthene and ferro hypersthene composition and clinopyroxene with augite- diopside composition. The trachybasaltic dikes have clinopyroxene with augite to diopside composition. The compostion of the pyroxenes shows that these rocks have been crystallized in a subduction zone setting. The average crystallization temperature of pyroxenes in gabbros is about 1070°C, and it seems the clinopyroxenes crystallized in the lower temperature than orthopyroxenes. While the average crystallization temperature of pyroxenes in the basic dikes is evaluated to be around 1130°C. The estimated pressure for clinopyroxenes crystallization in the studied gabbros is lower than 2 kb and 2 to 5 kb for orthopyroxenes. These data indicate that clinopyroxenes have been formed in the depth lower than 7.7 km and the orthopyroxenes in depth of 10 km. The crystallization pressure of clinopyroxenes in the basic dikes studied is calculated in the range of 2.7 to 2.8 kb which is in accordance with their formation in the depth of 10 km.https://ijp.ui.ac.ir/article_16104_5faaf913fca25230b5e9bdd747586d4f.pdfUniversity of IsfahanPetrological Journal2228-521031120121121Geology and geochemistry of Mishu S-type granitoid NW IranGeology and geochemistry of Mishu S-type granitoid NW Iran11112616107FAMalihehShahzeidiMohsenMoayyedShojiAraiTahminehPirniaJamshidAhmadianJournal Article20160614The Mishu garnitoid complex, located NW of Mishu Mountains, southwest of Marand and northwest of Iran (East Azarbaidjan), and intruded into the metamorphosed Precambrian rocks (Kahar Formation). Based on petrographic studies, the pluton composed of acid rocks including granodiorite, monzogranite, syenogranite and two-mica granite, all cut by acid and diabasic dykes. The presence of surmicaeous xenoliths are evidences of refractory minerals and restite. Petrographic and geochemical studies indicate that the Mishu plutonic rocks can be classified as S-type granite having calc-alkaline and peraluminous nature. On chondrite and primitive mantle-normalized diagrams, almost all the rocks show enrichment in LILE and LREE, HREE, HFSE depletion as significant negative depletion in Nb, Ta, Eu, Ti, Sr and Ba, which is typical of calc-alkaline magmatism from subduction-zone environment. The geochemical data and position of the studied samples on discriminative tectonic diagrams show that the rocks are compatible with orogenic granitoids.The Mishu garnitoid complex, located NW of Mishu Mountains, southwest of Marand and northwest of Iran (East Azarbaidjan), and intruded into the metamorphosed Precambrian rocks (Kahar Formation). Based on petrographic studies, the pluton composed of acid rocks including granodiorite, monzogranite, syenogranite and two-mica granite, all cut by acid and diabasic dykes. The presence of surmicaeous xenoliths are evidences of refractory minerals and restite. Petrographic and geochemical studies indicate that the Mishu plutonic rocks can be classified as S-type granite having calc-alkaline and peraluminous nature. On chondrite and primitive mantle-normalized diagrams, almost all the rocks show enrichment in LILE and LREE, HREE, HFSE depletion as significant negative depletion in Nb, Ta, Eu, Ti, Sr and Ba, which is typical of calc-alkaline magmatism from subduction-zone environment. The geochemical data and position of the studied samples on discriminative tectonic diagrams show that the rocks are compatible with orogenic granitoids.https://ijp.ui.ac.ir/article_16107_3767da6661b763ab29aff0c846f7717b.pdfUniversity of IsfahanPetrological Journal2228-521031120121121Autumn 1391 Appendix enAutumn 1391 Appendix en14014016112FAJournal Article20160614https://ijp.ui.ac.ir/article_16112_45aa7a2fbba1b2fb64c5329e329cdb16.pdf