气候变化领域集成服务门户(CCPortal): Heterogeneous sub-simple deformation in the Gol-e-Gohar shear zone (Zagros; SW Iran): insights from microstructural and crystal fabric analyses

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DOI	10.1007/s00531-019-01812-9
	Heterogeneous sub-simple deformation in the Gol-e-Gohar shear zone (Zagros; SW Iran): insights from microstructural and crystal fabric analyses
	Keshavarz S.; Faghih A.
发表日期	2020
ISSN	14373254
起始页码	421
结束页码	438
卷号	109 期号:2
英文摘要	Petrofabrics and microstructural characteristics of the quartz-rich mylonites were investigated in the NW–SE-trending Gol-e-Gohar shear zone with length of ca. 25 km within the Zagros Transpression Zone, SW Iran. The semi-quantitative vorticity analysis using quartz c-axis-fabric (Rxz/β method) and rigid porphyroclast geometry (Rigid Grain Net method) reveals that mean kinematic vorticity number (Wm) increases towards the Baghat Thrust Fault displaying the occurrence of spatial and temporal variations of flow during progressive deformation. The Wm values show pure shear-dominated flow progressively was changed to a simple shear-dominated flow toward to the late stages of ductile deformation, implying that the accelerating flow path was accompanied with progressive cooling and strain localization at the lower parts of the zone. The measured vertical thinning/dip-parallel elongation suggests that thrust emplacement and metamorphic rock extrusion likely occurred by a combination of simple shear with a pure shear component of deformation (i.e., general shear). The estimated deformation temperatures based on the quartz c-axis fabric patterns and their opening angles highlight greenschist-to-amphibolite-facies conditions. © 2020, Geologische Vereinigung e.V. (GV).
英文关键词	Deformation temperature; Quartz; Strain; Vorticity; Zagros
语种	英语
scopus关键词	amphibolite facies; deformation mechanism; ductile deformation; greenschist facies; microstructure; mylonite; petrofabric; quartz; shear zone; strain rate; temperature profile; Zagros
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147720
作者单位	Department of Earth Sciences, Graduate University of Advanced Technology, Kerman, Iran; Department of Earth Sciences, College of Sciences, Shiraz University, Shiraz, Iran
推荐引用方式 GB/T 7714	Keshavarz S.,Faghih A.. Heterogeneous sub-simple deformation in the Gol-e-Gohar shear zone (Zagros; SW Iran): insights from microstructural and crystal fabric analyses[J],2020,109(2).
APA	Keshavarz S.,&Faghih A..(2020).Heterogeneous sub-simple deformation in the Gol-e-Gohar shear zone (Zagros; SW Iran): insights from microstructural and crystal fabric analyses.International Journal of Earth Sciences,109(2).
MLA	Keshavarz S.,et al."Heterogeneous sub-simple deformation in the Gol-e-Gohar shear zone (Zagros; SW Iran): insights from microstructural and crystal fabric analyses".International Journal of Earth Sciences 109.2(2020).