Chromium isotope constraints on deep mantle oxidation from the Early Archean to Paleoproterozoic [PDF]
Nature CommunicationsThe evolution of Earth’s mantle redox state is central to understanding the rise of atmospheric oxygen and the development of a habitable planet. However, whether the deep mantle has become increasingly oxidized over geological time and its underlying ...
Li-Juan Xu +10 more
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Petrogenesis and tectonic significance of mafic–ultramafic rocks from Southwest Yunnan, China [PDF]
Comptes Rendus. Géoscience, 2020 This study focuses on the mafic–ultramafic lavas of the Early Carboniferous outcrop in Mangxin, southwestern Yunnan, China. Picrites with 26–32 wt% MgO and a quenched texture are the most significant components of this rock association.
Shi, Qing, Fang, Nianqiao
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Mantle hydration and the role of water in the generation of large igneous provinces [PDF]
Nature Communications, 2017 The genesis of large igneous provinces (LIPs) remains controversial. Here, the authors examine the water contents of picrites from the Emeishan LIP and find that despite high water contents, the elevated temperature and trace elements suggest a mantle ...
Jia Liu +4 more
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The constant oxidation state of Earth’s mantle since the Hadean [PDF]
Nature CommunicationsDetermining the evolutionary history of mantle oxygen fugacity (fo2) is crucial, as it controls the fo2 of mantle-derived melts and regulates atmospheric composition through volcanic outgassing. However, the evolution of mantle fo2 remains controversial.
Fangyi Zhang +6 more
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Geochemistry, Geophysics, GeosystemsThe origin of the compositional dichotomy between high‐Ti and low‐Ti basalts in continental flood basalt provinces remains debated. Most existing studies attribute this dichotomy directly to variations in primitive magma composition to circumvent the ...
Zongpeng Yang +6 more
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, 2023 The contribution of water to the formation of large igneous provinces (LIPs) remains controversial. We report the first measurement of water content and hydrogen isotope ratios in olivine-hosted melt inclusions from the Dali picrites, which belong to the
Ren, Zhong-Yuan +5 more
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Геодинамика и тектонофизика, 2022 The isotope composition of carbon and oxygen was studied in calcite of dykes and veins of ultramafic lamprophyres, kimberlite, alkaline mica picrites from the Yarma above-intrusion zone, and pyroxene-free picrites intruding the rocks of the ...
Yu. V. Danilova +4 more
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MINERALOGY AND GENESIS OF ULTRAMAFIC ROCKS FROM THE KURTUSHIBA OPHIOLITE BELT (WESTERN SAYAN) [PDF]
Минералогия, 2022 The studies of minerals and melt inclusions in ultramafic rocks of the Kurtushiba ophiolite belt (Western Sayan) allowed us to establish the conditions of mineral-forming processes during their formation.
V.A. Simonov +2 more
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Phanerozoic Large Igneous Province, Petroleum System, and Source Rock Links
Geophysical Monograph Series, Page 191-228., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Steven C. Bergman +2 more
wiley +1 more source
The Salittu Formation in southwestern Finland, part II: Picritic-basaltic volcanism in mature arc environment [PDF]
Bulletin of the Geological Society of Finland, 2017 Svecofennian orogen that contain ultramafic rocks. New samples were collected from the picritic and basaltic rocks as well as spatially associated gabbroic rocks, and their major and trace element compositions are presented and discussed here.
M. Nironen
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