Results 1 to 10 of about 280 (152)

Fractal analysis of quartz boundaries as a strain rate proxy for tracing Earth’s stress history [PDF]

Scientific Reports
Understanding strain rates in naturally deformed rocks is crucial for reconstructing the tectonic history of orogenic belts. This study focuses on the Chahzar Thrust Zone, located within the Sanandaj-Sirjan metamorphic zone of southwestern Iran, an ideal
Mehdi Abdolzadeh, Seyed Rahim Hosseini, Iraj Rasa, Reza Derakhshani   +3 more
doaj   +2 more sources

Geochemistry and tectonic setting of basic dykes in the Boroujerd area (Sanandaj- Sirjan Zone) [PDF]

پترولوژی, 2017
Basic dykes, trending NE-SW and cross cutting the middle Jurassic granodioritic rocksexposed in the Boroujerd area. They are dark green and fine to medium–grained rocksand are characterized by ophitic to subophitic texture.
Zahra Tahmasbi, Hadis Ghasemifard, Ahmad Ahmadi khalaji, Leili Izadikian   +3 more
doaj   +2 more sources

Investigation of the evolution of arc: Azadegan magmatic rocks, north of Shahrekord, Sanandaj-Sirjan zone [PDF]

پترولوژی, 2021
The magmatic complex of Azadegan, composed of basalt, andesitic basalt, andesite, gabbro and diorite, located 45 km northwest of Shahrekord and in the middle part of the Sanandaj-Sirjan zone..
Maryam Ahankoub, Farimah Ayati, madineh nazari   +2 more
doaj   +2 more sources

Geological and mineralogical evolution of Lower Paleozoic (Late Cambrian) Corundum-Rich Metabauxite in the Southeast Sirjan, Sanandaj-Sirjan Zone

Journal of Economic Geology, 2019
Introduction Bauxite deposits in Iran are dominantly hosted by Late Triassic-Early Jurassic sequences in the Alborz zone and Late Cretaceous in the Zagros zone (e.g., Zarasvandi et al., 2008).
Mohsen Mobasheri, Fardin Mousivand , Mojtaba Rostami Hussory   +2 more
doaj   +2 more sources

Albin volcanism in Marivan region: Indication of extension in the Sanandaj-Sirjan continental arc [PDF]

پترولوژی, 2022
The Marivan region located in the west of Kurdistan province, northwest of Iran and in the structural geological divisions of Iran (Stöcklin and Nabavi, 1973). The Mesozoic volcanic rocks are widespread in the Northern Sanandaj- Sirjan zone in comparison
Akhtar Nezamivand chegini, Bahman Rahimzadeh   +1 more
doaj   +1 more source

Granitoids of Sanandaj-Sirjan Zone that are concurrent with Cimmerian Orogeny (178-160 Ma) belong to ilmenite series (S-type): investigation of reason for lacking the porphyry tin mineralization

Journal of Economic Geology, 2021
ntroduction The granitic rocks are divided into magnetite and ilmenite series (Ishihara 1977), coinciding spatially with the I-type (εNdi0; (87Sr/86Sr)i~0.704-0.706) and S-type granites (εNdi0.707, N-MORB normalized patterns with enrichment in Low- and ...
Mohammad Hassan Karimpour, Nargess Shirdashtzadeh, Martiya Sadeghi   +2 more
doaj   +1 more source

Geochemistry and petrogenesis of south Qorveh A-type granitoids (northwest of Sanandaj- Sirjan zone): An evidence for active continental margin tensional tectonic [PDF]

پترولوژی, 2020
The studied area (Galali- Varmaqan) located at the northern part of the Sanandaj- Sirjan zone, south of the Qorveh city. The granitic rocks are dominated by quartz, alkali- feldspar and plagioclase.
Majid Shirmohammadi, Ali Asghar Sepahi Gerow, Mohammad Maanijou, Ashraf Tourkian   +3 more
doaj   +1 more source

Geochemistry and Petrogenesis of Mata Lower Jurassic basaltic rocks, Southeast Kerman, Implication to Southern Sanandaj-Sirjan zone evolution [PDF]

پترولوژی, 2019
Lower Jurassic volcanic-sedimentary sequence in the southern end of the Sanandaj-Sirjan zone, north of Mata village (southwest Jiroft), composed of tuffaceous limestone, calcareous tuff, limestone, including felsic volcaniclastic and basaltic volcanic ...
Zahra Badrzadeh
doaj   +1 more source

Bashkirian foraminifera in the Sanandaj-Sirjan Zone (Iran): Their importance in taxonomy, biostratigraphy, and palaeobiogeographic reconstruction of the southern margin of Western Palaeotethys

Journal of Asian Earth Sciences, 2023
A noteworthy Lower Pennsylvanian fusulinid fauna is, for the first time, reported from the Sanandaj-Sirjan Zone in Iran. From the main outcrop, eighty five species of thirty genera belonging to two classes, five orders, five suborders, seven superfamilies, sixteen families, and seven subfamilies are examined.
Fassihi, Shirin, Vachard, Daniel, Heinz, Petra, Shirezadeh Esfahani, Fariba   +3 more
openaire   +2 more sources

The Neotethyan Sanandaj‐Sirjan zone of Iran as an archetype for passive margin‐arc transitions [PDF]

Tectonics, 2016
AbstractThe Sanandaj‐Sirjan zone of Iran is a northwest trending orogenic belt immediately north of the Zagros suture, which represents the former position of the Neotethys Ocean. The zone contains the most extensive, best preserved record of key events in the formation and evolution of the Neotethys, from its birth in Late Paleozoic time through its ...
Hassanzadeh, Jamshid, Wernicke, Brian P.
openaire   +2 more sources