Magmatic and metamorphic evolution of the Shotur Kuh metamorphic complex (Central Iran)

2009 ◽  
Vol 100 (1) ◽  
pp. 45-62 ◽  
Author(s):  
Mahmoud Rahmati-Ilkhchi ◽  
Shah Wali Faryad ◽  
František V. Holub ◽  
Jan Košler ◽  
Wolfgang Frank
Keyword(s):  
Central Iran ◽  
Metamorphic Complex ◽  
Metamorphic Evolution

scholarly journals Review of the Ordovician stratigraphy and fauna of the Anarak Region in Central Iran

2015 ◽  
Vol 65 (4) ◽  
pp. 403-435 ◽  
Author(s):  
Leonid E. Popov ◽  
Vachik Hairapetian ◽  
David H. Evans ◽  
Mansoureh Ghobadi Pour ◽  
Lars E. Holmer ◽  
...  
Keyword(s):  
North China ◽  
Cold Water ◽  
Central Iran ◽  
Metamorphic Complex ◽  
North African ◽  
Northern Margin ◽  
Faunal Assemblages ◽  
Lower Ordovician ◽  
Low Diversity ◽  
Sedimentary Succession

Abstract The Ordovician sedimentary succession of the Pol-e Khavand area, situated on the northern margin of the Yazd block, has important differences from those in other parts of Central Iran. It has been established that the presumably terminal Cambrian to Lower Ordovician volcano-sedimentary Polekhavand Formation, exposed in the Pol-e Khavand area, has non-conformable contact with greenschists of the Doshakh Metamorphic Complex. The succeeding, mainly siliciclastic Chahgonbad Formation contains low to moderately diverse faunal assemblages, including brachiopods, cephalopods, trilobites and tentaculitids. The Darriwilian age of the lower part of the formation is well established by the co-occurrence of brachiopod genera Camerella, Phragmorthis, Tritoechia and Yangtzeella. The associated rich cephalopod fauna is different from the Darriwilian cephalopod associations of the Alborz terrane and may show some affinity with warm water faunas of North China and South Korea. It is likely that the Mid Ordovician fauna recovered from the lower part of the Chahgonbad Formation settled in the area sometime during a warming episode in the late Darriwilian. By contrast the low diversity mid Katian brachiopod association includes only three taxa, which occur together with the trilobite Vietnamia cf. teichmulleri and abundant, but poorly preserved tentaculitids questionably assigned to the genus Costatulites. This faunal association bears clear signatures linking it to the contemporaneous cold water faunas of the Arabian, Mediterranean and North African segments of Gondwana. Four brachiopod species recovered from the Chahgonbad Formation, including Hibernodonta lakhensis, Hindella prima, Lomatorthis? multilamellosa and Yangtzeella chupananica are new to science.

Tectono-metamorphic evolution of the Neyriz metamorphic complex, Quri-Kor-e-Sefid area (Sanandaj-Sirjan Zone, SW Iran)

2008 ◽  
Vol 31 (4-6) ◽  
pp. 504-521 ◽  
Author(s):  
M.R. Sheikholeslami ◽  
A. Pique ◽  
P. Mobayen ◽  
M. Sabzehei ◽  
H. Bellon ◽  
...  
Keyword(s):  
Metamorphic Complex ◽  
Metamorphic Evolution ◽  
Sanandaj Sirjan Zone ◽  
Sw Iran

scholarly journals Mineralogy and geothermo-barometry of metapelitic schists, amphibolites and garnet amphibolites from Gol-Gohar metamorphic complex, SW Sirjan, Central Iran.

2019 ◽  
Vol 27 (2) ◽  
pp. 437-448
Author(s):  
rezvan Mirzaii raini ◽  
Ali Ahmadi ◽  
Hasan Mirnejad ◽  
Mohammad Boomeri ◽  
Kazona Kashima
Keyword(s):  
Central Iran ◽  
Metamorphic Complex

Neoarchean metamorphic evolution and geochronology of the Miyun metamorphic complex, North China Craton

2019 ◽  
Vol 320 ◽  
pp. 78-92 ◽  
Author(s):  
Hui C.G. Zhang ◽  
Jia-Hui Liu ◽  
Yi-Chao Chen ◽  
Qian W.L. Zhang ◽  
Van Tho Pham ◽  
...  
Keyword(s):  
North China Craton ◽  
North China ◽  
Metamorphic Complex ◽  
Metamorphic Evolution

Metamorphic evolution and SHRIMP U-Pb geochronology of mafic granulites with double symplectites in the Fuping metamorphic complex, middle Palaeoproterozoic Trans-North China Orogen

2019 ◽  
Vol 326 ◽  
pp. 142-154 ◽  
Author(s):  
Jia-Hui Liu ◽  
Qian W.L. Zhang ◽  
Hui C.G. Zhang ◽  
Hao Y.C. Wang ◽  
Hong-Xu Chen ◽  
...  
Keyword(s):  
North China ◽  
Metamorphic Complex ◽  
Metamorphic Evolution

scholarly journals Contrasting subduction–exhumation paths in the blueschists of the Anarak Metamorphic Complex (Central Iran)

2017 ◽  
Vol 155 (2) ◽  
pp. 316-334 ◽  
Author(s):  
S. ZANCHETTA ◽  
N. MALASPINA ◽  
A. ZANCHI ◽  
L. BENCIOLINI ◽  
S. MARTIN ◽  
...  
Keyword(s):  
Mineral Chemistry ◽  
Greenschist Facies ◽  
Central Iran ◽  
Accretionary Wedge ◽  
Metamorphic Complex ◽  
Metamorphic Stage ◽  
Compositional Zoning ◽  
Mafic Rocks ◽  
Ophiolitic Complex ◽  
Tectonic Dynamics

AbstractThe Anarak Metamorphic Complex, localized in Central Iran, is a fossil accretionary wedge composed of several tectonometamorphic units. Some of these, the Chah Gorbeh, the Morghab and the Ophiolitic complexes, contain mafic rocks that have been metamorphosed at high-pressure–low-temperature conditions. Such units have been stacked together and later refolded during the final stages of exhumation. Structural analysis at the mesoscale recognized at least three deformation events. Microstructural analyses, mineral chemistry and thermodynamic modelling reveal that the mafic schists followed contrasting P–T paths during their tectonometamorphic evolutions. In the schists of the Chah Gorbeh and Ophiolitic complexes an early greenschist-facies stage was later overprinted by blueschist-facies phase assemblages with suggested peak conditions of 390–440°C at 0.6–0.9 GPa for the meta-basalt within the Ophiolitic Complex and 320–380°C at 0.6–0.9 GPa for the blueschists of the Chah Gorbeh Complex. P–T conditions at metamorphic peak were 410–450°C at 0.78–0.9 GPa for the Morghab blueschists, but they are reached before a greenschist-facies re-equilibration. Compositional zoning of amphiboles and epidotes of this greenschist-facies stage suggests a renewed pressure increase at the end of this metamorphic stage. Based on these data we reconstructed a clockwise P–T path for the Morghab mafic schists and a counter-clockwise path for the Chah Gorbeh blueschists and ophiolitic meta-basalts. Such contrasting metamorphic evolutions of tectonic units that were later accreted to the same wedge are indicative of the complex tectonic dynamics that occur within accretionary–subduction complexes.

Insights into the metamorphic evolution of the Belt–Purcell basin; evidence from Lu–Hf garnet geochronology

2010 ◽  
Vol 47 (2) ◽  
pp. 161-179 ◽  
Author(s):  
N. A. Zirakparvar ◽  
J. D. Vervoort ◽  
W. McClelland ◽  
R. S. Lewis
Keyword(s):  
Metamorphic Complex ◽  
Mica Schist ◽  
Garnet Amphibolite ◽  
Metamorphic Evolution ◽  
Garnet Porphyroblasts ◽  
Core Zone ◽  
The Core ◽  
Northern Idaho

We have determined Lu–Hf garnet ages from spatially separated garnet bearing localities in northern Idaho. The Lu–Hf ages are diverse and reflect a progression of Mesoproterozoic metamorphic events. The oldest Lu–Hf garnet age determined in this study is 1463 ± 24 Ma for garnet within a kyanite schist exposed in the core-zone of the Boehls Butte metamorphic complex. A garnet schist from the Priest River complex yields a well-defined age of 1379 ± 8 Ma. A garnet–staurolite schist, a garnet–mica schist, and a gem-grade Idaho star garnet sample all from the general vicinity of Clarkia, Idaho, yield ages of 1064 ± 10, 1081 ± 20, and 1078 ± 17 Ma, respectively. A garnet amphibolite, also collected from the Boehls Butte metamorphic complex, yields an age of 1151 ± 41 Ma for garnet porphyroblasts and 137 ± 25 Ma for diffuse overgrowths. The Hf in all of the Proterozoic garnets is extraordinarily radiogenic with εHf values ranging from +1210 to +10546, which attest to both their high Lu/Hf ratios and their great antiquity. All of the samples analyzed in this study are from the rocks of the Mesoproterozoic Belt–Purcell Supergroup or its basement. These data provide evidence of polymetamorphism in northwestern Laurentia during the Mesoproterozoic.

Mid-Cretaceous biostratigraphy (ammonites, inoceramid bivalves and foraminifers) at the eastern margin of the Anarak Metamorphic Complex (Central Iran)

2020 ◽  
Vol 110 ◽  
pp. 104411
Author(s):  
Markus Wilmsen ◽  
Michaela Berensmeier ◽  
Franz Theodor Fürsich ◽  
Felix Schlagintweit ◽  
Vachik Hairapetian ◽  
...  
Keyword(s):  
Central Iran ◽  
Metamorphic Complex ◽  
Eastern Margin
Sign in / Sign up

Export Citation Format

Share Document