干旱区生态环境知识资源中心(Arid): Crustal architecture studies in the Iranian Cadomian arc: Insights into source, timing and metallogeny

Arid

DOI	10.1016/j.oregeorev.2021.104280
	Crustal architecture studies in the Iranian Cadomian arc: Insights into source, timing and metallogeny
	Vesali, Yusef; Sepidbar, Fatemeh; Palin, Richard M.; Chiaradia, Massimo
通讯作者	Sepidbar, F (corresponding author), Damghan Univ, Sch Earth Sci, Damghan 3671641167, Iran.
来源期刊	ORE GEOLOGY REVIEWS
ISSN	0169-1368
EISSN	1872-7360
出版年	2021
卷号	136
英文摘要	The Jalal Abad magmatic rocks, situated at the southern edge of the Saghand-Bafgh-Zarand district, include a thick pile of Cadomian extrusive and pyroclastic units intruded by younger granitoid stocks. New zircon U-Pb ages show eruptions at -552 Ma, followed by emplacement of granodiorite at -537 Ma. The Jalal Abad magmatic rocks have typical high-K and shoshonitic signatures, and are characterized by enrichment in large-ion lithophile elements (LILEs) and depletion in high-field-strength elements (HFSE). Zircon epsilon Hf(t) from the Jalal Abad magmatic rocks ranges from +3.9 to -3.9 for volcanic rocks and -1.2 to +8.1 for granodiorite. Zircon delta 18O values for the Jalal Abad are variable from +5.1 to +8.8 parts per thousand, progressively higher than those of mantle-derived melts. The whole-rock epsilon Nd(t) values range between -7.7 to -7.4 for granodiorite, -4.6 to -3 for volcanic rocks and -6.2 to -8.2 for ignimbrites/tuff. The whole-rock Nd and zircon Hf crustal model ages (TDM C ) for the Jalal Abad magmatic rocks range between 0.8 and 2.3 Ga. All of the Jalal Abad magmatic rocks have quite similar trace element patterns, and slightly different whole-rock Nd and zircon Hf isotopic composition, indicating the involvement of the thick continental crust during the formation of these rocks. Modeling of zircon Hf-O data, bulk-rock trace elements, and Sr-Nd isotopes suggest the magmas were generated by interaction of mantle-derived melts with thick continental crust through assimilation/fractional crystallization (AFC) processes. However, crustal architecture studies in the Iranian Cadomian arcs show that AFC processes were more important during the Mesoarchean-Early Neoproterozoic (3000-1000 Ma), whereas juvenile magmas became increasingly important to the Cadomian (600-500 Ma) magmatism. Early Cambrian intrusive magmas seemingly intruded sedimentary sequences in the study region and provided magmatic constituents and a heat source for hydrothermal processes and mineralization.
英文关键词	Zircon U-Pb dating Cadomian magmatism AFC processes Iran
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000669448400004
WOS关键词	U-PB ; IOCG MINERALIZATION ; MAGNETITE DEPOSIT ; EASTERN DESERT ; OSSA-MORENA ; HF ISOTOPES ; IRON-ORES ; EL-LACO ; ZIRCON ; COMPLEX
WOS类目	Geology ; Mineralogy ; Mining & Mineral Processing
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
来源机构	University of Oxford
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351244
作者单位	[Vesali, Yusef] Univ Tehran, Dept Geol, Fac Sci, Tehran 1415564155, Iran; [Sepidbar, Fatemeh] Damghan Univ, Sch Earth Sci, Damghan 3671641167, Iran; [Palin, Richard M.] Univ Oxford, Dept Earth Sci, Oxford, England; [Chiaradia, Massimo] Univ Geneva, Sect Earth & Environm Sci, Dept Mineral, Geneva, Switzerland
推荐引用方式 GB/T 7714	Vesali, Yusef,Sepidbar, Fatemeh,Palin, Richard M.,et al. Crustal architecture studies in the Iranian Cadomian arc: Insights into source, timing and metallogeny[J]. University of Oxford,2021,136.
APA	Vesali, Yusef,Sepidbar, Fatemeh,Palin, Richard M.,&Chiaradia, Massimo.(2021).Crustal architecture studies in the Iranian Cadomian arc: Insights into source, timing and metallogeny.ORE GEOLOGY REVIEWS,136.
MLA	Vesali, Yusef,et al."Crustal architecture studies in the Iranian Cadomian arc: Insights into source, timing and metallogeny".ORE GEOLOGY REVIEWS 136(2021).