Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/126719
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Late Neoproterozoic adakitic magmatism of the eastern Arabian Nubian Shield |
Author: | Cox, G. Foden, J. Collins, A. |
Citation: | Geoscience Frontiers, 2018; 10(6):1981-1992 |
Publisher: | Elsevier |
Issue Date: | 2018 |
ISSN: | 1674-9871 |
Statement of Responsibility: | Grant M. Cox, John Foden, Alan S. Collins |
Abstract: | Late Neoproterozoic adakitic magmatism within the Eastern Arabian Nubian Shield has been dated at 633.2 ± 9.0 Ma (2σ). These magmas intrude the forearc Ad Dawadimi Basin, which is composed of metapelitic schists and greywacke along with ophiolitic mélanges of boninitic affinity which underwent inversion and deformation by ∼620 Ma. This adakitic magmatism, while intruding parts of the Ad Dawadimi Basin, predates this deformation, but is possibly coincident with basin closure. As adakitic magmatism requires melting of an amphibolite or eclogitic source, empirical and experimental constraints require anomalously hot supra-subduction zone mantle. Considering that this magmatism immediately predates basin inversion, these magmas possibly pinpoint the timing of the slab breaking, marking the terminal stages of arc magmatism, terrane accretion and the influx of hot oceanic asthenospheric mantle. This influx of hot asthenospheric mantle may also be responsible for post-collisional A-type magmatism. |
Keywords: | Arabian Nubian Shield; adakites; A-type magmatism |
Rights: | © 2019, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NCND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
DOI: | 10.1016/j.gsf.2017.12.006 |
Published version: | http://dx.doi.org/10.1016/j.gsf.2017.12.006 |
Appears in Collections: | Aurora harvest 8 Geology & Geophysics publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.