Skip navigation
Skip navigation

Carbonated mantle domains at the base of the Earth's transition zone

Sun, Wei-dong; Hawkesworth, Chris J.; Yao, Chao; Zhang, Chan-chan; Huang, Rui-fang; Liu, Xi; Sun, Xin-lei; Song, Mao-shuang; Ling, Ming-xing; Ding, Xing; Zhang, Zhao-feng; Fan, Wei-ming; Wu, Zhong-qing; Ireland, Trevor

Description

The oxygen fugacity of the upper mantle is 3–4 orders of magnitude higher than that of the lower mantle and this has been attributed to Fe²⁺ disproportionating into Fe³⁺ plus Fe⁰ at pressures > 24 GPa. The upper mantle might therefore have been expected to have evolved to more oxidizing compositions through geological time, but it appears that the oxygen fugacity of the upper mantle has remained constant for the last 3.5 billion years. Thus, it indicates that the mantle has been actively...[Show more]

CollectionsANU Research Publications
Date published: 2017-08-03
Type: Journal article
URI: http://hdl.handle.net/1885/139072
Source: Chemical Geology
DOI: 10.1016/j.chemgeo.2017.08.001

Download

File Description SizeFormat Image
1-s2.0-S0009254117304308-main.pdfAuthor/s Accepted Manuscript (AAM) / Post-print1.25 MBAdobe PDF    Request a copy


Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  23 August 2018/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator