气候变化领域集成服务门户(CCPortal): Mesozoic rifting evolution of SW Gondwana: A poly-phased, subduction-related, extensional history responsible for basin formation along the Argentinean Atlantic margin

CCPortal

DOI	10.1016/j.earscirev.2020.103138
	Mesozoic rifting evolution of SW Gondwana: A poly-phased, subduction-related, extensional history responsible for basin formation along the Argentinean Atlantic margin
	Lovecchio J.P.; Rohais S.; Joseph P.; Bolatti N.D.; Ramos V.A.
发表日期	2020
ISSN	00128252
卷号	203
英文摘要	The opening of the South Atlantic in the Early Cretaceous was the final stage of the complex rifting history of SW Gondwana. In this contribution we reassess the chronology of Mesozoic basin formation in southern South America and Africa and integrate it in the long-term breakup history of SW Gondwana. Triassic rifting is characterized by intracontinental rifting in Africa (Karoo I phase), and retro-arc extension on the SW-margin of Gondwana. In the Early Jurassic, the impingement of the Karoo plume triggered rifting in Eastern Africa, producing the Karoo II basins (and the Colorado and Salado basins on the Argentinean shelf). East Africa rifting ultimately lead the breakup of Eastern from Western Gondwana in the Middle Jurassic. In Patagonia, the Austral, Malvinas and other related basins formed in association with the synextensional emplacement of the Chon Aike magmatic province in the Patagonian retro-arc. In the Late Jurassic the Rocas Verdes back-arc basin opened in southern Patagonia, while oblique rifting in the core of the Late Paleozoic Gondwanides orogen produced the Outeniqua and Rawson/Valdés basins. The South Atlantic Rift initiated in the Early Cretaceous associated with present-day E-W extension. Rifting occurred diachronically from south to north, initiating in the previously thinned Rawson/Valdés-Outeniqua segment. A precursor oblique rift system and a larger degree of extension in this segment could explain the lack of Seaward Dipping Reflectors (SDR) south of the Colorado-Cape fracture zones. Rifting and SDR emplacement occurred progressively to the north along different rift segments, producing strongly asymmetric conjugate margins. © 2020 Elsevier B.V.
关键词	Cretaceous Gondwana Jurassic Karoo Rifting South Atlantic
英文关键词	basin evolution; continental breakup; emplacement; extensional tectonics; Gondwana; Mesozoic; plate tectonics; rifting; subduction zone; tectonic evolution; Argentina; Atlantic Ocean; Atlantic Ocean (South); Karoo; South Africa
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203796
作者单位	YPF S.A. Exploration, Macacha Güemes 515, Buenos Aires, 1106, Argentina; IFPEN, Direction Georessources, 1-4 avenue de Bois Préau, Rueil-Malmaison, 92852, France; IDEAN, UBA-CONICET, Intendente Güiraldes 2160, Buenos Aires, 1428, Argentina
推荐引用方式 GB/T 7714	Lovecchio J.P.,Rohais S.,Joseph P.,et al. Mesozoic rifting evolution of SW Gondwana: A poly-phased, subduction-related, extensional history responsible for basin formation along the Argentinean Atlantic margin[J],2020,203.
APA	Lovecchio J.P.,Rohais S.,Joseph P.,Bolatti N.D.,&Ramos V.A..(2020).Mesozoic rifting evolution of SW Gondwana: A poly-phased, subduction-related, extensional history responsible for basin formation along the Argentinean Atlantic margin.Earth Science Reviews,203.
MLA	Lovecchio J.P.,et al."Mesozoic rifting evolution of SW Gondwana: A poly-phased, subduction-related, extensional history responsible for basin formation along the Argentinean Atlantic margin".Earth Science Reviews 203(2020).