干旱区生态环境知识资源中心(Arid): Geochemistry of the middle-upper Miocene Bathan Formation, Al-Rehaili area, Jeddah, Saudi Arabia: provenance, tectonic setting, and paleoweathering implications

Arid

DOI	10.1007/s12517-019-4602-y
	Geochemistry of the middle-upper Miocene Bathan Formation, Al-Rehaili area, Jeddah, Saudi Arabia: provenance, tectonic setting, and paleoweathering implications
	Ghandour, Ibrahim M.1,2; Haredy, Rabea A.1
通讯作者	Ghandour, Ibrahim M.
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2019
卷号	12 期号:14
英文摘要	The present work investigates geochemical and mineralogical signatures preserved in the fluvio-lacustrine sediments of the middle-upper Miocene Bathan Formation at Al-Rehaili area, northern Jeddah, Saudi Arabia to constrain the composition and tectonic setting of the source area and to appraise the influence of weathering. Sixteen sediment samples were collected from the lacustrine delta plain and delta front sandstones (SS I), lacustrine offshore mudrocks, and the younger fluvial channel sandstones (SS II). The sandstones are compositionally immature first cycle. The sandstones (SS I) and the mudrocks of the first depositional stage were derived from an intermediate igneous source rock, whereas the sandstones (SS II) of the second depositional stage were derived mainly from a felsic igneous source rock with subordinate contribution from an intermediate igneous source rock. They indicate an active continental margin to oceanic arc tectonic setting. The values of the Chemical Index of Alteration (CIA) and the Plagioclase Index of Alteration (PIA) as well as the Al2O3/Na2O, Rb/Sr, and Al2O3/(CaO+Na2O) ratios indicate that the source rocks experienced low to moderate degree of weathering consistent with arid to semi-arid climate that prevailed during the Miocene. Subaerially exposed lacustrine offshore mudrocks displayed excessive depletion in the concentration of mobile elements comparing to the bedrock. The low values of the paleoweathering indices are further explained by the enhanced uplift of the Red Sea Escarpment after the cessation of the first stage of the Red Sea floor spreading at 14-15m.y. ago.
英文关键词	Bathan Formation geochemistry Provenance Tectonic setting Paleoweathering Red Sea syn-rift deposits
类型	Article
语种	英语
国家	Saudi Arabia ; Egypt
收录类别	SCI-E
WOS记录号	WOS:000475699500008
WOS关键词	GULF-OF-MEXICO ; SILICICLASTIC SEDIMENTS ; VINDHYAN SUPERGROUP ; TRACE-ELEMENT ; CLASTIC ROCKS ; BEACH SANDS ; EVOLUTION ; SHALES ; CHEMISTRY ; CHINA
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/2XILL650/214339
作者单位	1.King Abdulaziz Univ, Marine Geol Dept, Fac Marine Sci, POB 80207, Jeddah 21589, Saudi Arabia; 2.Tanta Univ, Dept Geol, Fac Sci, Tanta 31527, Egypt
推荐引用方式 GB/T 7714	Ghandour, Ibrahim M.,Haredy, Rabea A.. Geochemistry of the middle-upper Miocene Bathan Formation, Al-Rehaili area, Jeddah, Saudi Arabia: provenance, tectonic setting, and paleoweathering implications[J],2019,12(14).
APA	Ghandour, Ibrahim M.,&Haredy, Rabea A..(2019).Geochemistry of the middle-upper Miocene Bathan Formation, Al-Rehaili area, Jeddah, Saudi Arabia: provenance, tectonic setting, and paleoweathering implications.ARABIAN JOURNAL OF GEOSCIENCES,12(14).
MLA	Ghandour, Ibrahim M.,et al."Geochemistry of the middle-upper Miocene Bathan Formation, Al-Rehaili area, Jeddah, Saudi Arabia: provenance, tectonic setting, and paleoweathering implications".ARABIAN JOURNAL OF GEOSCIENCES 12.14(2019).