Xenolith - Wikipedia
Basalts, kimberlites, lamproites and lamprophyres, which have their source in the upper mantle, often contain fragments and crystals assumed to be a part of the originating mantle mineralogy. Xenoliths of dunite, peridotite and spinel lherzolite in basaltic lava flows are one example.
Transport and eruption of mantle xenoliths creates a lagging …
2023年5月24日 · Mantle xenoliths are generated through brittle deformation of lithospheric wall rocks, especially where magmas exsolve CO 2 –H 2 O-rich fluids.
Nature and evolution of lithospheric mantle beneath the …
2024年10月1日 · The mantle xenoliths were sawn into slabs, and clean rock slabs cut from the central portions of the xenoliths were used for thin section preparation, whole rock analysis, and mineral separation.
Xenolith - an overview | ScienceDirect Topics
Mantle xenoliths. Mantle xenoliths are fragments of the mantle brought to Earth's surface during volcanic eruptions. They are common in alkali basalts and in kimberlite pipes and provide an important constraint on mineral assemblages in the upper mantle.
Geochemistry of Cenozoic basalts and mantle xenoliths in …
2007年6月1日 · The mantle xenoliths were entrained as deep-sourced magma erupted and do not strictly record the intrinsic 3 He/ 4 He of the basalt mantle source. However, fluid inclusions in olivine typically undergo significant reequilibration with the host magma during ascent.
Xenoliths of the mantle lithosphere, the focus here, are found in a wide variety of alkaline and related magmatic deposits, such as nephelinites, basanites, lamprophyres, and kimberlite.
Perovskite-bearing crystal-controlled oxide-silicate mantle xenoliths ...
2023年10月13日 · The aim of this report is to detail the possible link between the exotic Pvr-bearing xenoliths and a deep-mantle origin by using the robust high P-T experimental data extant in subsystem, mineral equilibria studies of Pvr-Mg-Fe oxides and Pvr silicates.
Plume-driven recratonization of deep continental lithospheric mantle ...
2021年4月28日 · We use direct evidence from kimberlite-borne mantle xenoliths sampled along an Arctic Canada transect, along with geological and seismological evidence.
Multi-stage metasomatism of lithospheric mantle by …
2020年1月25日 · A detailed study on petrology and mineral chemistry of 12 mantle xenoliths from Late Cretaceous basaltic lava flows at Daxizhuang has been conducted to constrain the nature and secular evolution of the Mesozoic lithospheric …
Genetic Type and Formation Evolution of Mantle-Derived Olivine …
6 天之前 · The V/Sc values in mantle/xenolith olivine vary from 0.54 to 2.64, indicating a more oxidised state of the mantle. Rare earth element (REE) patterns show that the LREEs and HREEs of olivine host ...