Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.gsf.2017.01.009 |
Contemporaneous assembly of Western Gondwana and final Rodinia break-up: Implications for the supercontinent cycle | |
Oriolo, Sebastian1; Oyhantcabal, Pedro2; Wemmer, Klaus1; Siegesmund, Siegfried1 | |
通讯作者 | Oriolo, Sebastian |
来源期刊 | GEOSCIENCE FRONTIERS
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ISSN | 1674-9871 |
出版年 | 2017 |
卷号 | 8期号:6页码:1431-1445 |
英文摘要 | Geological, geochronological and isotopic data are integrated in order to present a revised model for the Neoproterozoic evolution of Western Gondwana. Although the classical geodynamic scenario assumed for the period 800-700 Ma is related to Rodinia break-up and the consequent opening of major oceanic basins, a significantly different tectonic evolution can be inferred for most Western Gondwana cratons. These cratons occupied a marginal position in the southern hemisphere with respect to Rodinia and recorded subduction with back-arc extension, island arc development and limited formation of oceanic crust in internal oceans. This period was thus characterized by increased crustal growth in Western Gondwana, resulting from addition of juvenile continental crust along convergent margins. In contrast, crustal reworking and metacratonization were dominant during the subsequent assembly of Gondwana. The Rio de la Plata, Congo-Sao Francisco, West African and Amazonian cratons collided at ca. 630-600 Ma along the West Gondwana Orogen. These events overlap in time with the onset of the opening of the Iapetus Ocean at ca. 610-600 Ma, which gave rise to the separation of Baltica, Laurentia and Amazonia and resulted from the final Rodinia break-up. The East African/Antarctic Orogen recorded the subsequent amalgamation of Western and Eastern Gondwana after ca. 580 Ma, contemporaneously with the beginning of subduction in the Terra Australis Orogen along the southern Gondwana margin. However, the Kalahari Craton was lately incorporated during the Late Ediacaran-Early Cambrian. The proposed Gondwana evolution rules out the existence of Pannotia, as the final Gondwana amalgamation postdates latest connections between Laurentia and Amazonia. Additionally, a combination of introversion and extroversion is proposed for the assembly of Gondwana. The contemporaneous record of final Rodinia break-up and Gondwana assembly has major implications for the supercontinent cycle, as supercontinent amalgamation and break-up do not necessarily represent alternating episodic processes but overlap in time. (C) 2017, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. |
英文关键词 | Brasilianoe-Pan-African Orogeny Neoproterozoic Collisional tectonics Pannotia Metacratonization Introversion-extroversion |
类型 | Article |
语种 | 英语 |
国家 | Germany ; Uruguay |
收录类别 | SCI-E |
WOS记录号 | WOS:000413237600017 |
WOS关键词 | DOM-FELICIANO BELT ; LA-PLATA CRATON ; PROVINCE NE-BRAZIL ; HF ISOTOPE GEOCHEMISTRY ; SOUTH EASTERN DESERT ; NICO PEREZ TERRANE ; PAN-AFRICAN ; LU-HF ; ANTI-ATLAS ; GEOCHRONOLOGICAL CONSTRAINTS |
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/2XILL650/199314 |
作者单位 | 1.Georg August Univ Gottingen, Geosci Ctr, Goldschmidtstr 3, D-37077 Gottingen, Germany; 2.Univ Republica, Fac Ciencias, Dept Geol, Montevideo, Uruguay |
推荐引用方式 GB/T 7714 | Oriolo, Sebastian,Oyhantcabal, Pedro,Wemmer, Klaus,et al. Contemporaneous assembly of Western Gondwana and final Rodinia break-up: Implications for the supercontinent cycle[J],2017,8(6):1431-1445. |
APA | Oriolo, Sebastian,Oyhantcabal, Pedro,Wemmer, Klaus,&Siegesmund, Siegfried.(2017).Contemporaneous assembly of Western Gondwana and final Rodinia break-up: Implications for the supercontinent cycle.GEOSCIENCE FRONTIERS,8(6),1431-1445. |
MLA | Oriolo, Sebastian,et al."Contemporaneous assembly of Western Gondwana and final Rodinia break-up: Implications for the supercontinent cycle".GEOSCIENCE FRONTIERS 8.6(2017):1431-1445. |
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