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Incompatible element

About: Incompatible element is a research topic. Over the lifetime, 2420 publications have been published within this topic receiving 154052 citations.


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Journal ArticleDOI
TL;DR: The preservation of early-formed (early-Hadean) 129Xe/130Xe isotopic heterogeneities in the modern convecting mantle is possible for other elements, such as Xe, that are not as efficiently recycled back into the mantle, owing to greater fluid mobility as discussed by the authors.

17 citations

Journal ArticleDOI
TL;DR: In this paper, it was shown that the high-pressure near-liquidus to near-solidus phases precipitated from basanitic magmas are compatible with derivation by small degrees of melting of an inhomogeneous mantle source recently enriched in LREE and other incompatible elements.
Abstract: Some xenolith-bearing Hoggar basanites and nephelinites possibly represent primary or near-primary magmas on account of their mg and Ni values. Simple model calculations show that they could be derived by 5–8 percent partial melting of a garnet-bearing pyrolite source. They are characterized by LREE enriched abundance patterns and by highly variable abundances of compatible and incompatible trace elements. These compositional features are compatible with derivation by small degrees of melting of an inhomogeneous mantle source recently enriched in LREE and other incompatible elements. Model calculations involving transition metal and REE contents do not support a cogenetic origin of the ultramafic xenoliths as source or residual material. Megacrysts of kaersutite, clinopyroxene, orthopyroxene, oligoclase, ilmenite and zircon are considered to represent high-pressure near-liquidus to near-solidus phases precipitated from basanitic magmas. Inconsistencies in trace element contents of some kaersutites and clinopyroxenes and host basalts suggest that these megacrysts are not strictly cognate with respect to their present hosts.

17 citations

Journal ArticleDOI
TL;DR: In this paper, the authors show that the HIMU (high μ, μ = 238 U/204Pb) endmember may reside in the transition zone of the mantle.

17 citations

Journal ArticleDOI
TL;DR: In this article, the authors dealt with tectonomagmatic evolution of collision-related leucogranite located near the northwest corner of exposed basement in Sinai, Egypt.
Abstract: The present study deals with tectonomagmatic evolution of the collision-related leucogranite located near the northwest corner of exposed basement in Sinai, Egypt The area is composed of: (1) a gabbroic complex; (2) amphibolite; (3) post-orogenic leucogranite; (4) Feiran gneisses The amphibolite and gabbroic suites, generated in an island arc environment, have a high Fe-tholeiitic affinity and were derived from two independent magmas On the basis of rare earth element (REE) patterns, the gabbroic melts could have been generated from a garnet- and amphibole-bearing, enriched mantle, and were subsequently modified by fractional crystallization of pyroxene and amphibole with minor plagioclase, whereas the amphibolite melts could be derived from garnet-free depleted mantle The leucogranite has high Al2O3 content (>13 wt%), alumina saturation index (ASI) mostly >1, and normative corundum, indicating a peraluminous nature Chondrite-normalized REE patterns for the leucogranite show light REE enrichment (La/SmN=27–486), general flattening of the heavy REE (Gd/LuN=12–2), and negative europium (Eu) anomalies (Eu/Eu*=024–047) The peraluminous nature and enrichment of the incompatible elements (K, Rb, Ba and Th) in the leucogranite strongly suggest derivation from a crustal source The most probable source for the leucogranite magmas is represented by the adjacent Feiran gneisses, which could have generated the leucogranite by dehydration melting under water-undersaturated conditions It appears likely that the restite unmixing model is responsible for the chemical variations within the leucogranite In accordance with this model, the chemical variation of the leucogranite can be attributed to varying degrees of separation of restitic material from the melt during its emplacement and solidification and fractional crystallization could have played a minor role during magma ascent through the crust

17 citations

Journal ArticleDOI
TL;DR: Magmatism of the Uda sector enclosed within the West Transbaikalian rift zone (WTRZ) is discussed in this article, where seven stages of the Late Mesozoic-Cenozoic volcanism have been recognized within span 174-51-Ma.

17 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20237
202216
202157
202056
201960
201851