干旱区生态环境知识资源中心(Arid): Geochemistry of Asara Shale member of Karaj Formation, Central Alborz, Iran: Provenance, source weathering and tectonic setting

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DOI	10.1016/j.marpetgeo.2020.104584
	Geochemistry of Asara Shale member of Karaj Formation, Central Alborz, Iran: Provenance, source weathering and tectonic setting
	Malekzadeh, Mohammad; Hosseini-Barzi, Mahboubeh; Sadeghi, Abbas; Critelli, Salvatore
通讯作者	Hosseini-Barzi, M
来源期刊	MARINE AND PETROLEUM GEOLOGY
ISSN	0264-8172
EISSN	1873-4073
出版年	2020
卷号	121
英文摘要	The Asara Shale Member of the Karaj Formation, Middle to Upper Eocene in age, includes mixed volcaniclastic, siliciclastic and carbonate strata, in the Alborz Mountains, northern Iran. These strata have been geochemically analyzed to constrain their source area provenance. Most of the major and trace element contents of Asara Shale samples are generally similar to the upper continental crust (UCC) values and their chemical index of alteration (CIA) values (31.7-50.9), suggesting a semi-arid climate in a weathering-limited source area. Moreover, correlation of major element oxides suggests the controlling effect of plagioclase and clay minerals on these data when XRD analysis and SEM images indicate clastic sourced illite and chlorite in the samples, probably due to the weathering of volcanic ash and glass in an aqueous transport and depositional environment. However, the chondrite-normalized REE plot of mudrocks of the Asara Shale show a similarity with the UCC composition. Mineral composition and geochemistry of the Asara Shale mudrocks reveal the rapid reworking of pene-contemporaneous volcaniclastic deposits, which had covered the surrounding areas, instead of their epiclastic genesis related to erosion and transport. Major, trace, and rare earth element (REE) data, imply a felsic composition of the volcanic source, related to an active continental margin/continental island arc and most probably back-arc tectonic setting for the depositional basin, inferring a mid-upper Eocene extensional volcanism in a subduction complex.
英文关键词	Asara shale Geochemistry Source area weathering Paleotectonics and provenance Alborz basin
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000569124100001
WOS关键词	EOCENE-OLIGOCENE SANDSTONES ; MAJOR-ELEMENT CHEMISTRY ; SEDIMENTARY-ROCKS ; THRACE BASIN ; SILICICLASTIC SEDIMENTS ; CRUSTAL EVOLUTION ; PLATE-TECTONICS ; ARCHEAN SHALES ; PETROGENESIS ; ENVIRONMENT
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326273
作者单位	[Malekzadeh, Mohammad; Hosseini-Barzi, Mahboubeh; Sadeghi, Abbas] Shahid Beheshti Univ, Fac Earth Sci, Sedimentary Basins & Petr Dept, Tehran 1983963113, Iran; [Critelli, Salvatore] Univ Calabria, Dept Biol Ecol & Earth Sci, Arcavacata Di Rende, CS, Italy
推荐引用方式 GB/T 7714	Malekzadeh, Mohammad,Hosseini-Barzi, Mahboubeh,Sadeghi, Abbas,et al. Geochemistry of Asara Shale member of Karaj Formation, Central Alborz, Iran: Provenance, source weathering and tectonic setting[J],2020,121.
APA	Malekzadeh, Mohammad,Hosseini-Barzi, Mahboubeh,Sadeghi, Abbas,&Critelli, Salvatore.(2020).Geochemistry of Asara Shale member of Karaj Formation, Central Alborz, Iran: Provenance, source weathering and tectonic setting.MARINE AND PETROLEUM GEOLOGY,121.
MLA	Malekzadeh, Mohammad,et al."Geochemistry of Asara Shale member of Karaj Formation, Central Alborz, Iran: Provenance, source weathering and tectonic setting".MARINE AND PETROLEUM GEOLOGY 121(2020).