DOI: 10.1016/j.earscirev.2020.103201
论文题名: Adamastor – an ocean that never existed?
作者: Konopásek J. ; Cavalcante C. ; Fossen H. ; Janoušek V.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2020
卷: 205 语种: 英语
中文关键词: Adamastor Rift
; Araçuaí–Ribeira–Congo Belt
; Dom Feliciano–Kaoko–Gariep Belt
; intracontinental orogeny
; Neoproterozoic
; Rodinia to Gondwana
英文关键词: crustal structure
; orogenic belt
; Proterozoic
; rifting
; subduction
; tectonic evolution
; Arabian Sea
; Atlantic Ocean
; Atlantic Ocean (South)
; Gulf of Aden
; Indian Ocean
; Red Sea [Indian Ocean]
; Adamastor
; Ara
英文摘要: Existing models of tectonic evolution of the Neoproterozoic orogenic system rimming the shores of the South Atlantic Ocean (the Araçuaí–Ribeira–Congo and Dom Feliciano–Kaoko–Gariep belts) interpret the belts as subduction-related orogens and emphasize the role of the “Adamastor Ocean” in their pre-collisional evolution. A critical problem in such an interpretation is the confined nature of the northern termination of the orogenic system, as well as a very short time span between the end of rifting and onset of convergence recognized in its southern part. In this contribution, we review the data for the pre- and synorogenic evolution of this system of orogens (here collectively called the South Atlantic Neoproterozoic Orogenic System) and show that the data speak against the presence of a large oceanic domain before the onset of its orogenic evolution. We propose a new and simple intracontinental model, suggesting that Neoproterozoic oceanic crust played only a minor role in the development of the South Atlantic Neoproterozoic Orogenic System and that its overall architecture and thermal evolution is the result of inversion of large-scale rift structures with a protracted, and probably episodic, extensional history. True oceanic crust probably developed only in the southern part of the rift system, but it must have been narrow, akin to the Red Sea–Gulf of Aden stage of the “Adamastor Rift” evolution just before the onset of convergent thickening. © 2020 The Author(s) Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166128
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Department of Geosciences, UiT – The Arctic University of Norway, Dramsveien 201, Tromsø, 9037, Norway; Czech Geological Survey, Klárov 3, Praha 1, 118 21, Czech Republic; Departamento de Geologia, Universidade Federal do Paraná, Av. Cel. Francisco Heráclito dos Santos, 100, Centro Politécnico, Curitiba, PR 81531-980, Brazil; Museum of Natural History/Department of Earth Science, University of Bergen, Allégaten 41, Bergen, 5007, Norway
Recommended Citation:
Konopásek J.,Cavalcante C.,Fossen H.,et al. Adamastor – an ocean that never existed?[J]. Earth Science Reviews,2020-01-01,205