DOI: 10.1016/j.earscirev.2020.103138
论文题名: Mesozoic rifting evolution of SW Gondwana: A poly-phased, subduction-related, extensional history responsible for basin formation along the Argentinean Atlantic margin
作者: Lovecchio J.P. ; Rohais S. ; Joseph P. ; Bolatti N.D. ; Ramos V.A.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2020
卷: 203 语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166165
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Earth Science Reviews,2020-01-01,203