Results 51 to 60 of about 944 (183)
Highly Enriched and Heterogeneous Mantle Signals Recorded in Mantle Pyroxenite Veins
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.Abstract The Earth's mantle is inherently heterogeneous, reflecting ongoing mantle depletion and crustal recycling driven by plate tectonics. Radiogenic isotopes in oceanic basalts are commonly used to characterize mantle reservoirs, but the full chemical diversity of mantle‐derived melts may be obscured by magma mixing during melt transport and ...
Zhen‐Yu Zhang +8 more
wiley +1 more source
Geochemistry and petrogenesis of the Feshark intrusion (NE Isfahan city)
Journal of Economic Geology, 2017 Introduction Granitic rocks are the most abundant rock types in various tectonic settings and they have originated from mantle-derived magmas and/or partial melting of crustal rocks.
Ali Kananian +4 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.Abstract The 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 complexities of significant evolutionary processes, such as multiphase fractional ...
Zongpeng Yang +6 more
wiley +1 more source
Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.Abstract Meteorites serve as an exceptional source of insight into our planet and the Solar System. Most meteorite fragments were recovered hundreds to thousands of years after their fall, and therefore exhibit varying degrees of terrestrial weathering, which has altered or completely removed weather‐sensitive mineral phases.
M. Kołodziej +4 more
wiley +1 more source
Journal of Metamorphic Geology, Volume 44, Issue 7, Page 510-536, August 2026.ABSTRACT The processes involved during subduction initiation (SI) remain poorly constrained, in part due to the rarity of geological archives. Ophiolites and their underlying metamorphic soles are thought to form during subduction zone infancy and may thus provide critical constraints. Metamorphic soles are derived from oceanic crust of the lower plate
François Fournier‐Roy +11 more
wiley +1 more source
Annals of Geophysics, 1997 The petrogenesis and time/space distribution of the magmatism associated with the formation of the Northern and Southern Tyrrhenian basins, together with the directions and ages of lithospheric extension and/or spreading north and south of the 410N ...
G. Serri
doaj +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.Abstract Eocene magmatism in southern Tibet records deep geodynamic processes associated with the India‐Asia collision. The Quxu batholith, a representative segment of the Gangdese magmatic belt, hosts widespread mafic microgranular enclaves (MMEs) indicating magma mixing.
Yuanku Meng +5 more
wiley +1 more source
Occurrence and Provenance of KREEP Components in Glassy Agglutinates From Chang'e‐5 Lunar Regolith
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.Abstract This study investigates the petrogenesis of glassy agglutinates in a polished section of the Chang'e‐5 lunar regolith sample CE5C0800YJYX018GP through integrated petrographic, mineralogical, and geochemical analyses of four representative particles (18GP‐01 to 18GP‐04).
Shuai Ma, Zhipeng Xia, Bingkui Miao
wiley +1 more source
The Origin of Carbonate Magmas Predating and Accompanying Main‐Phase LIPs Eruptions
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.Abstract Some large igneous provinces (LIPs) are associated with precursory carbonatite eruptions. Models for precursory carbonatites invoking partial melting of a carbonate metasomatized lithosphere appear implausible, given the long time needed for heat conduction from the plume head.
Cinzia G. Farnetani, Mark A. Richards
wiley +1 more source