干旱区生态环境知识资源中心(Arid): Detrital zirconU-Pb-Hfdata from Cambrian sandstones of the Ougarta Mountains Algeria: Implication for palaeoenvironment

Arid

DOI	10.1002/gj.3899
	Detrital zirconU-Pb-Hfdata from Cambrian sandstones of the Ougarta Mountains Algeria: Implication for palaeoenvironment
	Wang, Qian 1; Spencer, Christopher J.2,3; Hamdidouche, Rachid 4; Zhao, Guochun 1,5; Evans, Noreen J.6; McDonald, Bradley J.6
通讯作者	Spencer, Christopher J.
来源期刊	GEOLOGICAL JOURNAL
ISSN	0072-1050
EISSN	1099-1034
出版年	2020
卷号	55 期号:12 页码:7760-7774
英文摘要	We report new detrital zircon U-Pb ages and Hf isotopic signatures of detrital zircons in Cambrian sedimentary rocks from the Ougarta Mountains of Algeria in the West African Craton (WAC) in order to provide constraints on the palaeo-catchments of the Early Palaeozoic river systems draining Gondwana. The Cambrian sedimentary samples from the Ougarta Mountains have near-identical age spectra with a dominant age peak at 618 Ma and an additional age peak at 2,035 Ma. The oldest detrital zircon grain is 3,407 Ma. The epsilon Hf((t))values of the 618 Ma age peak spans from epsilon Hf-(t)+12 to -25 with a dominant mode at -1; the epsilon Hf((t))of the Palaeoproterozoic zircon ranges from 6 to -27 with an average of -10; the pre-2,300 Ma zircon Hf lie along a crustal evolution trajectory (Lu-176/Hf-177 = 0.01) back to the depleted mantle at similar to 3,100 Ma. The maximum depositional age of the sandstones in the Sebkhet el Melah Formation is constrained by the youngest detrital zircon age of 559 +/- 13 Ma and by the underlying volcaniclastic rocks dated at 555 +/- 7 Ma (Late Ediacaran to the Early Cambrian). The 618 and 2,035 Ma age peaks are consistent with a proximal provenance from the WAC, and it is possible that recycling of eroded material from the Cadomian arc and Pan-African rocks may have been a potential source of the Ediacaran detrital zircons analysed herein. There were four (0.9%) Stenian detrital zircons identified in this study, and our results are consistent with the lack of WAC Stenian detrital zircon noted in previous studies, except those reported from a single Middle Cambrian sample in Morocco. Correlative sedimentary successions further to the east contain ubiquitous ca. 1.0 Ga detrital zircon that was likely supplied from the Trans-Gondwana Mountain chain. It is noteworthy that the WAC and Sahara Metacraton are surrounded on three sides by Neoproterozoic orogenic systems, with the Rokelide, Dahomeyide, Pharuside, Anti-Atlas, and Brasiliano orogens (reconstructed position from Gondwana palaeogeography) around the WAC and the Dahomeyide, Pharuside, East African orogen, and Oubangides orogens around the Sahara Metacraton. We posit these orogenic belts acted as drainage divides that controlled sediment routing pathways. Additionally, the occurrence of Stenian detrital zircon in Morocco could be explained by longshore drift coming from the east (present-day coordinates).
英文关键词	Algeria detrital zircon Lu-Hf isotope northern Gondwana zircon U-Pb age
类型	Article
语种	英语
国家	Peoples R China ; Australia ; Canada ; Algeria
收录类别	SCI-E
WOS记录号	WOS:000542027700001
WOS关键词	WEST-AFRICAN CRATON ; HF ISOTOPIC COMPOSITION ; U-PB ; CRUSTAL GROWTH ; ICP-MS ; NORTHERN GONDWANA ; EASTERN DESERT ; TRACE-ELEMENT ; RING COMPLEX ; RHEIC OCEAN
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/2XILL650/319559
作者单位	1.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian, Peoples R China; 2.Curtin Univ, Sch Earth & Planetary Sci, Inst Geosci Res, Perth, WA, Australia; 3.Queens Univ, Dept Geol Sci & Geol Engn, Kingston, ON, Canada; 4.Univ Sci & Technol Houari Boumediene, Fac Sci Terre Geog & Amenagement Terr, Dept Geol, Algiers, Algeria; 5.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China; 6.Curtin Univ, John de Laeter Ctr, Sch Earth & Planetary Sci, Perth, WA, Australia
推荐引用方式 GB/T 7714	Wang, Qian,Spencer, Christopher J.,Hamdidouche, Rachid,et al. Detrital zirconU-Pb-Hfdata from Cambrian sandstones of the Ougarta Mountains Algeria: Implication for palaeoenvironment[J],2020,55(12):7760-7774.
APA	Wang, Qian,Spencer, Christopher J.,Hamdidouche, Rachid,Zhao, Guochun,Evans, Noreen J.,&McDonald, Bradley J..(2020).Detrital zirconU-Pb-Hfdata from Cambrian sandstones of the Ougarta Mountains Algeria: Implication for palaeoenvironment.GEOLOGICAL JOURNAL,55(12),7760-7774.
MLA	Wang, Qian,et al."Detrital zirconU-Pb-Hfdata from Cambrian sandstones of the Ougarta Mountains Algeria: Implication for palaeoenvironment".GEOLOGICAL JOURNAL 55.12(2020):7760-7774.