PETROGRAPHY, GEOCHEMISTRY, U-PB DATING AND SR-ND ISOTOPES OF IGNEOUS ROCKS IN TANNURJEH PORPHYRY AU-CU PROSPECT AREA (NE KASHMAR)

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HOSSIENI RAZIEH; KARIMPOUR MOHAMMAD HASSAN; MALEKZADEH SHAFAROUDI AZADEH

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Journal: PETROLOGY Year:2018 | Volume:9 | Issue:33 Page(s): 45-70

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Title

PETROGRAPHY, GEOCHEMISTRY, U-PB DATING AND SR-ND ISOTOPES OF IGNEOUS ROCKS IN TANNURJEH PORPHYRY AU-CU PROSPECT AREA (NE KASHMAR)

Author(s)

HOSSIENI RAZIEH | KARIMPOUR MOHAMMAD HASSAN | MALEKZADEH SHAFAROUDI AZADEH | Issue Writer Certificate

Keywords

PETROLOGYQ1

ZIRCON DATINGQ1

SR-ND ISOTOPEQ1

TANNURJEHQ2

KHAF-KASHMAR- BARDASKAN MAGMATIC BELTQ1

Abstract

The TANNURJEH porphyry Au-Cu prospect area is located in the northeastern Kashmar, the Khorasan Razavi province, and central of the Khaf-Kashmar-Bardaskan magmatic belt. Geologically, the area is dominated by the Tertiary rhyolitic-rhyodacitic volcanic rocks, which are intruded by monzonitic to dioritic subvolcanic intrusive rocks. The texture in the most of the study igneous rocks is porphyry with fine groundmass and the main minerals are plagioclase, alkali feldspar, quartz, biotite, hornblende and magnetite. The monzonitic intrusions are the source of widespred mineralization and alteration, whereas the diorite is the later phase, which is devoid of mineralization. Using zircon UPb method, the age of monzonitic intrusive was determined at 39.8 Ma (Middle Eocene), geochemically as well as mineralogically, the igneous rocks of the area are calc-alkaline granitoids belonging to magnetite series (I-type) which were developed in subduction tectonic setting. The LREE enrichment relative to HREE and enrichment in K, Rb, Cs, Th, and U in comparison to Ti and Nb elements are observed in all of the samples studied. Eu negative anomalies and low Sr/Y ratios can be attributed to the presence of residual plagioclase in the source. (87Sr/86Sr) i (0.705673 and 0.705158), (143Nd/144Nd) i (0.512524 and 0.512570), and eNdi (-1.22 and -0.32) values indicate magma is derived from mantle wedge above subducted slab, which is assimilated with upper crust. Finally, the Eocene is an important metallogenic episode, particuarly for Au and Cu, in NE of Iran.

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APA: Copy

HOSSIENI, RAZIEH, KARIMPOUR, MOHAMMAD HASSAN, & MALEKZADEH SHAFAROUDI, AZADEH. (2018). PETROGRAPHY, GEOCHEMISTRY, U-PB DATING AND SR-ND ISOTOPES OF IGNEOUS ROCKS IN TANNURJEH PORPHYRY AU-CU PROSPECT AREA (NE KASHMAR). PETROLOGY, 9(33 ), 45-70. SID. https://sid.ir/paper/196961/en

Vancouver: Copy

HOSSIENI RAZIEH, KARIMPOUR MOHAMMAD HASSAN, MALEKZADEH SHAFAROUDI AZADEH. PETROGRAPHY, GEOCHEMISTRY, U-PB DATING AND SR-ND ISOTOPES OF IGNEOUS ROCKS IN TANNURJEH PORPHYRY AU-CU PROSPECT AREA (NE KASHMAR). PETROLOGY[Internet]. 2018;9(33 ):45-70. Available from: https://sid.ir/paper/196961/en

IEEE: Copy

RAZIEH HOSSIENI, MOHAMMAD HASSAN KARIMPOUR, and AZADEH MALEKZADEH SHAFAROUDI, “PETROGRAPHY, GEOCHEMISTRY, U-PB DATING AND SR-ND ISOTOPES OF IGNEOUS ROCKS IN TANNURJEH PORPHYRY AU-CU PROSPECT AREA (NE KASHMAR),” PETROLOGY, vol. 9, no. 33 , pp. 45–70, 2018, [Online]. Available: https://sid.ir/paper/196961/en

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