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DOI	10.1016/j.epsl.2019.116041
	Do carbonatites and alkaline rocks reflect variable redox conditions in their upper mantle source?
	Braunger S.; Marks M.A.W.; Wenzel T.; Chmyz L.; Guitarrari Azzone R.; Markl G.
发表日期	2020
ISSN	0012821X
卷号	533
英文摘要	A detailed investigation on seven carbonatites and associated alkaline rock complexes (Kaiserstuhl, Sokli, Kovdor, Palabora, Oka, Magnet Cove, Jacupiranga), together with a world-wide comparison between carbonatites, alkaline silicate rocks and mantle xenoliths, implies peculiar redox conditions for carbonatite-bearing alkaline complexes: Carbonatites and associated alkaline rocks in continental settings crystallize from relatively oxidized magmas, on average 1.4 log units ([Formula presented]) and 1.3 log units ([Formula presented]) above the synthetic fayalite-magnetite-quartz (FMQ) buffer. In contrast, alkaline rocks in continental settings that lack associated carbonatites reveal rather reduced conditions (mean [Formula presented]; [Formula presented]). The calculated redox conditions for carbonatites and associated silicate rocks demonstrate that these crystallize from relatively oxidized mantle-derived melts compared to the general range found for alkaline rocks in continental settings. © 2019 Elsevier B.V.
关键词	alkaline silicate rocks carbonatites mantle oxygen fugacity redox conditions
英文关键词	Magnetite; Silicate minerals; Carbonatites; mantle; Oxygen fugacity; Redox condition; Silicate rocks; Rocks; alkaline rock; carbonatite; fugacity; igneous geochemistry; mantle source; oxygen isotope; redox conditions; upper mantle; Arkansas; Baden-Wurttemberg; Brazil; Canada; Finland; Germany; Jacupiranga; Kaiserstuhl; Kovdor; Lappi [Finland]; Magnet Cove; Murmansk [Russian Federation]; Oka Complex; Quebec [Canada]; Russian Federation; Sokli; South Africa; United States
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202508
作者单位	Department of Geosciences, Eberhard-Karls-Universität Tübingen, Wilhelmstrasse 56, Tübingen, 72074, Germany; Institute of Geosciences, Universidade de São Paulo, Rua do Lago 562, São Paulo, 05508-080, Brazil
推荐引用方式 GB/T 7714	Braunger S.,Marks M.A.W.,Wenzel T.,et al. Do carbonatites and alkaline rocks reflect variable redox conditions in their upper mantle source?[J],2020,533.
APA	Braunger S.,Marks M.A.W.,Wenzel T.,Chmyz L.,Guitarrari Azzone R.,&Markl G..(2020).Do carbonatites and alkaline rocks reflect variable redox conditions in their upper mantle source?.Earth and Planetary Science Letters,533.
MLA	Braunger S.,et al."Do carbonatites and alkaline rocks reflect variable redox conditions in their upper mantle source?".Earth and Planetary Science Letters 533(2020).