Results 1 to 10 of about 1,221,168 (223)

Discovery of Late Mississippian (late Serpukhovian)-Early Pennsylvanian (earliest Bashkirian?) foraminiferal assemblages from the Sanandaj-Sirjan Zone, Iran: Biostratigraphic and palaeoenvironmental implications. [PDF]

open access: hybridGeol J (Chichester), 2023
The new discovery of the Late Mississippian (late Serpukhovian)–Early Pennsylvanian (early Bashkirian?) foraminiferal assemblages, providing the palaeoecological data about the upper Serpukhovian–lowermost Bashkirian? foraminiferal faunas, and identifying the depositional environments of the Sanandaj–Sirjan Zone during this time, as well as describing ...
Fassihi S   +3 more
europepmc   +3 more sources

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

open access: yesپترولوژی, 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   +1 more
doaj   +3 more sources

Tourmaline geochemistry in the granitoids of the Sanandaj–Sirjan Zone (A case study of Astaneh and Aligudarz granitoids) [PDF]

open access: greenپترولوژی
IntroductionTourmaline exhibits a broad range of chemical variability (Hawthorne and Henry, 1999). This diverse and complex chemistry reflects a clear genetic link between tourmaline and the environment from which it crystallized.
Farimah Ayati, Maryam Ahankoub
doaj   +2 more sources

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

open access: yesScientific 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   +3 more
doaj   +2 more sources

Ilvaite trace mineral chemistry as a thermodynamic recorder of retrograde alteration and metallogenic indicator for discrimination of skarn deposits: an example from the iron deposit in North Sanandaj-Sirjan Zone [PDF]

open access: greenعلوم زمین خوارزمی, 2023
Ilvaite, CaFe22+Fe3+(Si2O7)O(OH), is one of the important trace minerals in the retrograde alteration stage of skarn deposits. In this contribution, by using microscopic evidence, X-ray diffraction (XRD) and electron microprobe analysis (EPMA), the ...
Ebrahim Tale Fazel
doaj   +1 more source

Saheb Granitoid Batholith, North of Kurdistan: An Evidence of Cretaceous- Paleocene Magmatism in the Sanandaj-Sirjan Zone

open access: greenJournal of Economic Geology, 2020
Introduction The Iranian plateau is part of the Alpine-Himalayan orogenic belt, which consists of several continental fragments separated from each other by major boundary faults and/or ophiolitic suture zones (Gansser, 1981).
Farid Abdollahi   +4 more
doaj   +2 more sources

A petrofabric study of deformation in the southeastern Sanandaj-Sirjan metamorphic zone: Constraints from structures and microstructures [PDF]

open access: greenعلوم زمین خوارزمی
This study investigates deformation in the Chai-Kour metamorphic complex, located in the Sanandaj-Sirjan metamorphic belt, using structural, microstructural, and strain analyses.
Saeede Keshavarz
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

open access: yesJournal 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   +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]

open access: yesپترولوژی, 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   +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]

open access: yesپترولوژی, 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

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