Mineral chemistry, petrogenesis and evolution of the Ghorveh-Seranjic skarn, Northern Sanandaj Sirjan Zone, Iran

Published on Feb 1, 2020in Mineralogy and Petrology1.573
· DOI :10.1007/s00710-019-00688-6
Zohreh Alaminia (Kharazmi University), Behzad Mehrabi12
Estimated H-index: 12
(Kharazmi University)
+ 1 AuthorsFrancesca Tecce
The Ghorveh-Seranjic (GS) skarn is located in the northern part of the Sanandaj-Sirjan zone, NW Iran, which is part of Alpine-Himalaya orogenic belt. The GS metamorphic complex is the oldest unit in the GS area composed of marble, dolomitic marble, greenschist, and amphibolite of Early Jurassic age. The complex is intruded by NW-SE trending Late Jurassic peraluminous granitoids, which caused contact metamorphism and resulted in the development of skarn, hornfels and crystallization of marble. The skarn is showing distinct textural, mineralogical and geochemical zonation. At least four stages of skarn development have been recognized; stage I, clinopyroxene+garnet±vesuvianite±quartz±calcite±scheelite± pyrrhotite; stage II, garnet+clinopyroxene +vesuvianite+scheelite±apatite+calcite±pyrrhotite; stage III, amphibole+vesuvianite+epidote+chlorite±quartz±calcite±pyrrhotite±pyrite±chalcopyrite and stage IV, quartz+calcite±amphibole±epidote±chlorite±pyrite±chalcopyrite. Scheelite occurs in stages 1 and 2 together with garnet and clinopyroxene, and its abundance slightly increases with vesuvianite growth. In general, mineral chemistry of the GS skarn shows enrichment in Ca, Al and Mg. Two types of garnet, clinopyroxene and vesuvianite are identified in the prograde stage within the GS skarn. Variable Mg:Mn:Fe proportions in clinopyroxene of the early prograde stage suggest formation from a relatively homogeneous F-rich volatile phase. Mineralogical documentation of the GS skarn indicates that presence of the F-rich volatile phase affected zoning patterns and mineral abundances. Addition of fluorine increases the solubility of Al in the hydrothermal fluid by forming strong Al-F complexes, causing an increase in vesuvianite instead of clinopyroxene during the late prograde substage, resulting in high garnet/clinopyroxene ratios. The presence of granditic (grossular-andradite) and subcalcic (grossular-almandine-spessartine) garnet during the skarn evolution suggests variable Fe/Mn and Fe2+/Fe3+ ratios during the prograde stage of the skarn formation. Subcalcic garnet formed in a relatively reduced environment compared to the granditic garnet. Paragenetic reconstructions indicate that clinopyroxene, garnet and scheelite grew together during the prograde stage. These minerals were stable and coexisted at temperatures between 580 °C and 400 °C and at a logfO2 = −18 to −28.
  • References (81)
  • Citations (0)
📖 Papers frequently viewed together
9 Citations
6 Citations
78% of Scinapse members use related papers. After signing in, all features are FREE.
Abstract The Kozbudaklar scheelite skarn deposit in the Tavsanli Zone, located approximately 22 km southeast of Bursa, is hosted by the Triassic calcic Inonu Marble and Eocene Topuk Pluton. At least four stages have been recognized through skarn evolution. Scheelite skarn distributed close to the Topuk Pluton occurred during the early (stage 1) and late (stage 2) prograde substages. The early prograde endo and exoskarn are composed of hedenbergite (Hd 96 Joh 4 )–plagioclase (An 55–64 ) and heden...
7 CitationsSource
#1Hossein Azizi (UKH: University of Kurdistan Hewler)H-Index: 13
#2Keivan Mohammadi (UKH: University of Kurdistan Hewler)H-Index: 1
Last. Behzad Mehrabi (Kharazmi University)H-Index: 12
view all 6 authors...
The Ebrahim-Attar (EBAT) leucogranite body is intruded within the Jurassic metamorphic complex of the Ghorveh area, located in the northern part of the Sanandaj Sirjan zone (SaSZ) of northwest Iran. The granite comprises alkali feldspar, quartz, Na-rich plagioclase and to a lesser extent, muscovite and biotite. Garnet and beryl are also observed as accessory minerals. Additionally, high SiO2 (71.4–81.0wt %) and Rb (145–440 ppm) content; low MgO (<0.12wt %), Fe2O3 (< 0.68 wt.%), Sr (mainly < 20 p...
7 CitationsSource
4 CitationsSource
#1Pengfei Zuo (China University of Geosciences)H-Index: 1
#2Xuefei Liu (China University of Geosciences)H-Index: 13
Last. Songsheng Ge (CAS: Chinese Academy of Sciences)H-Index: 1
view all 6 authors...
6 CitationsSource
#1Hossein Azizi (UKH: University of Kurdistan Hewler)H-Index: 13
#2Mohammad Najari (TMU: Tarbiat Modares University)H-Index: 1
Last. Koshi Yamamoto (Nagoya University)H-Index: 22
view all 6 authors...
Abstract The northern Sanandaj–Sirjan Zone (SaSZ) in northwestern Iran contains several granitoid and gabbroic bodies that are parallel to the Zagros Suture zone in a northwest–southeast direction. The fine-grained Taghiabad gabbro and coarse-grained Kangareh gabbroic bodies southwest of the Ghorveh in the northern SaSZ were crystallized at 158.0 ± 10.0 Ma and 148.3 ± 3.6 Ma, respectively, based on U–Pb zircon dating. The SiO 2 contents of the Kangareh and Taghiabad rocks are similar and range f...
14 CitationsSource
#1Farzaneh Shakerardakani (Kharazmi University)H-Index: 2
#2Franz Neubauer (University of Salzburg)H-Index: 39
Last. Gertrude Friedl (University of Salzburg)H-Index: 12
view all 9 authors...
Abstract The Dorud–Azna region of the Sanandaj–Sirjan metamorphic zone (SSMZ) in NW Iran is part of the Zagros orogenic belt and exposes an amphibolite-grade metamorphic succession of mixed continental (e.g., the granitic Galeh–Doz orthogneiss) and oceanic or rift (e.g., various amphibolites) origin, which is intruded by the Darijune gabbro. Laser-ablation ICP–MS U–Pb zircon ages of 608 ± 18 Ma and 588 ± 41 Ma of the granitic Galeh–Doz orthogneiss indicate a Panafrican basement similar to that o...
29 CitationsSource
#1S. Yajam (Kharazmi University)H-Index: 1
#2Pilar MonteroH-Index: 34
Last. Fernando BeaH-Index: 38
view all 6 authors...
The Ghorveh-Dehgolan plutons of the northern Sanandaj-Sirjan Zone, Zagros Orogen, comprise seven composite intrusive bodies that were generated during northeastward subduction of Neotethys beneath the Iranian sector of the Eurasian plate. Zircon U-Pb SHRIMP dating reveals that the magmatic activity spanned from ~160 to ~140Ma. It started with intrusion of arc-related calc-alkaline mafic to intermediate rocks closely followed by felsic I-type granitoids. This magmatism was post-dated by felsic al...
8 CitationsSource
#1Hossein Azizi (UKH: University of Kurdistan Hewler)H-Index: 13
#2Mina Zanjefili-Beiranvand (TMU: Tarbiat Modares University)H-Index: 1
Last. Yoshihiro Asahara (Nagoya University)H-Index: 19
view all 3 authors...
The Ghalaylan Igneous Complex is located in the northern part of the Sanandaj–Sirjan zone (SSZ) in northwest Iran. At the surface, the complex is ellipsoidal or ring-shaped. The igneous rocks, which are medium- to fine-grained, were intruded into a Jurassic metamorphic complex and are cut by younger dikes. Zircon U–Pb ages indicate that the crystallization of the main body occurred from 157.9 ± 1.6 to 155.6 ± 5.6 Ma. The igneous complex includes granodiorite, tonalite, and quartz monzonite, as w...
30 CitationsSource
5 CitationsSource
Cited By0