干旱区生态环境知识资源中心(Arid): Age and hafnium isotope evolution of Sudanese Butana and Chad illuminates the Stenian to Ediacaran evolution of the south and east Sahara

Arid

DOI	10.1016/j.precamres.2021.106323
	Age and hafnium isotope evolution of Sudanese Butana and Chad illuminates the Stenian to Ediacaran evolution of the south and east Sahara
	Blades, Morgan L.; Collins, Alan S.; Foden, John; Payne, Justin L.; Stuewe, Kurt; Abu-Alam, Tamer; Makroum, Farid; Hassan, Mahmoud
通讯作者	Collins, AS (corresponding author), Univ Adelaide, Dept Earth Sci, Tecton & Earth Syst Grp TES, Adelaide, SA 5005, Australia.
来源期刊	PRECAMBRIAN RESEARCH
ISSN	0301-9268
EISSN	1872-7433
出版年	2021
卷号	362
英文摘要	The Saharan Metacraton is a poorly known tract of pre-Neoproterozoic continental crust that occupies the area between the juvenile Arabian Nubian Shield, in the east, and the Tuareg Shield to the west. Neoproterozoic orogenesis (i.e. Oubanguides and East African orogenies) affect the west, the south and the east of the meta-craton, respectively, which led to deformation, emplacement of igneous bodies, and localised episodes of rift-related magamatism. Details about interior regions of the Saharan Metacraton are poorly known, with much of it covered by Phanerozoic rocks. The basement outcrops in Sudan, Chad, Algeria and Libya have been the subject of few modern geochronological studies. Here we present results from the first zircon geochronology and in-situ zircon hafnium isotope investigations from both the Sudanese Butana and central Chad. The terranes in Butana, formed to the east of pre-Neoproterozoic continental crust of the Saharan Metacraton, with the oldest juvenile magmatism (epsilon(Hf)(t) of +4.89 to +7.89) at ca. 839 Ma, followed by subsequent magmatism at ca. 787 Ma. The ca. 787 Ma event (seen elsewhere in the East African Orogen) is interpreted to represent volcanic-arc collision and accretion with the kernel of the Saharan Metacraton. The ca. 839 Ma magmatism is contemporaneous with the accretion of the Tonian (ca. 850 Ma) arc terranes of the Arabian Nubian Shield and marks subduction to the east of the Saharan Metacraton. The magmatic history of the Ouaddai region in Chad begins in the late Mesoproterozoic, with localised rifting, resulting in the emplacement of juvenile granites (ca. 1030 Ma). The Cryogenian and Ediacaran in the Saharan Metacraton reveal a complicated history of magmatism and deformation. Age data from Chad show the emplacement of granites (from melting of Mesoproterozoic crust: epsilon(Hf)(t) = +2.04 and 4.07) at ca. 665-654 Ma, coeval with the main East African Orogeny and accretion of the other ANS terranes to the Saharan Metacraton at ca. 650-580 Ma. The youngest tectonothermal event within the Saharan Metacraton is recorded by emplacement of granites between 580 and 550 Ma (epsilon(Hf)(t) values of 17 to 31) in southern Chad.
英文关键词	Butana Chad Saharan Metacraton U-Pb geochronology Zircon Hafnium
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000684184400027
WOS关键词	ARABIAN-NUBIAN SHIELD ; PAN-AFRICAN OROGENY ; RED-SEA HILLS ; ZIRCON U-PB ; NORTH-CENTRAL CAMEROON ; ADAMAWA-YADE DOMAIN ; TUAREG SHIELD ; CRUSTAL EVOLUTION ; CENTRAL HOGGAR ; BAYUDA DESERT
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/2XILL650/364410
作者单位	[Blades, Morgan L.; Collins, Alan S.; Foden, John] Univ Adelaide, Dept Earth Sci, Tecton & Earth Syst Grp TES, Adelaide, SA 5005, Australia; [Payne, Justin L.] Univ South Australia, Sch Built & Nat Environm, Adelaide, SA, Australia; [Stuewe, Kurt] Karl Franzens Univ Graz, Inst Geol & Palaontol, A-8010 Graz, Austria; [Abu-Alam, Tamer] Norges Arktiske Univ, Univ Biblioteket, N-9037 Tromso, Norway; [Makroum, Farid] Mansoura Univ, Fac Sci, Geol Dept, Mansoura, Egypt; [Hassan, Mahmoud] Suez Canal Univ, Fac Sci, Geol Dept, Ismailia 41522, Egypt
推荐引用方式 GB/T 7714	Blades, Morgan L.,Collins, Alan S.,Foden, John,et al. Age and hafnium isotope evolution of Sudanese Butana and Chad illuminates the Stenian to Ediacaran evolution of the south and east Sahara[J],2021,362.
APA	Blades, Morgan L..,Collins, Alan S..,Foden, John.,Payne, Justin L..,Stuewe, Kurt.,...&Hassan, Mahmoud.(2021).Age and hafnium isotope evolution of Sudanese Butana and Chad illuminates the Stenian to Ediacaran evolution of the south and east Sahara.PRECAMBRIAN RESEARCH,362.
MLA	Blades, Morgan L.,et al."Age and hafnium isotope evolution of Sudanese Butana and Chad illuminates the Stenian to Ediacaran evolution of the south and east Sahara".PRECAMBRIAN RESEARCH 362(2021).