Mafic Rock - an overview | ScienceDirect Topics
1999年6月8日 · Mafic rocks of the Dniester–Bug Series are also depleted in highly incompatible elements, except Ba. Because Cs, Rb, Th, U, K can be mobile during granulite-facies …
Geochemistry and origin of the Late Carboniferous ultramafic, …
2024年9月1日 · During the generation of the mafic appinitic part, the residual magma was enriched in felsic elements along with hydrous fluids, and consequently, plagioclase and minor …
Origin of mafic microgranular enclaves (MMEs) and their host …
2013年2月1日 · Mafic microgranular enclaves are commonly present in Muchen pluton, South China. The consistency of ages implies the quartz monzonites and MMEs were coeval. Mafic …
Differential lithospheric evolution during craton destruction: …
2024年12月5日 · Mafic magmatic suites are key to understanding the evolution of cratonic lithospheric mantle, especially by analyzing their geochemical and isotopic transitions. This …
On the origin of high-pressure mafic granulite in the Eastern …
2022年4月1日 · The mafic granulite (samples 45-1 and 45-5) and hosting leucosome (sample 97-12) studied in this work were collected from the core of a thick (~30 m wide) layer of garnet …
Chemical and mineralogical compositions of silicic, mafic, and …
2011年3月7日 · The TiO 2 /Al 2 O 3 values are 0.02-0.08 for alkali, < 0.02 for silicic, and > 0.10 for mafic tonsteins and mafic tuffs, indicating different magma sources. Mafic tuffs and alkali …
Preservation of Archean mafic lower continental crust worldwide
2024年1月15日 · However, mafic granulite xenoliths from a variety of localities where no Archean rocks are exposed demonstrate that the Archean mafic lower crust is widely preserved. These …
Differential core-to-periphery emplacement of mafic magma in an …
The mafic intrusion is composed of hornblende + plagioclase + clinopyroxene + garnet + accessory quartz, titanite, ilmenite, magnetite, pyrrhotite, chalcopyrite and pentlandite. Field …
Rejuvenation of a granitic magma reservoir by mafic injections ...
2025年1月1日 · Moreover, in many mafic intrusions (e.g., Skaergaard, Bushveld), zircon is indicated to crystallize in the last pocket of differentiated melt, close to the emplacement level, …
Revisiting magnesium isotope constraints on the petrogenesis of …
2025年1月15日 · These studies have shown that equilibrium isotope fractionation is commonly observed among mafic silicates—such as olivine, clinopyroxene and orthopyroxene—whereas …