Peridotite and pyroxenite xenoliths from Tarim, NW China: …
2014年9月1日 · Mantle-derived spinel peridotite and spinel plagioclase pyroxenite xenoliths hosted in Cenozoic alkali basalts (20 Ma) are found in the Xikeer area, western Tarim Block, NW China. Based on petrographic and geochemical characteristics, the peridotite xenoliths are divided into three groups.
Fertile upper mantle peridotite xenoliths indicate no wholesale ...
2023年12月19日 · Peridotite xenoliths suitable for Re-Os dating show Archean (2.6 to 2.9 Ga) age for a depleted lithospheric mantle beneath several well-studied cratons such as North America, South Africa,...
Iron and magnesium isotopic compositions of peridotite …
2011年6月15日 · Here we present the first combined Fe and Mg isotopic study of mantle minerals from a set of well-characterized peridotite xenoliths from the Subei Basin in the Yangtze Craton, China. These peridotites experienced significant melt extraction at ∼1.8 Ga and extensive melt percolation during Cenozoic magmatism (Reisberg et al., 2005).
Mantle peridotite xenoliths in andesite lava at El Peñon, central ...
2007年8月15日 · Peridotite xenoliths in arc settings might provide a direct record of the composition of the lithospheric mantle wedge beneath active convergent margins, and illustrate the effects of metasomatism and partial melting associated with subduction in these regions.
Characterizing Peridotite Xenoliths From Southern Vietnam: …
2023年7月26日 · We present data for lithospheric mantle xenoliths sampled from two alkali basalts in south-central Vietnam, Pleiku and Xuan Loc, including fertile spinel peridotites.
Petrology and Geochemistry of Mantle Peridotite Xenoliths from …
1995年2月1日 · Major-element compositions of the peridotite xenoliths are controlled largely by the degree of partial melting, and the extra fertile peridotites (high CaO and Al2O3) are probably the products of interaction between peridotites and a basaltic component.
Carbonatite metasomatized peridotite xenoliths from southern …
2000年11月1日 · The mineral chemistry, major and trace element, and Sr–Nd isotopic composition of Cr-diopside, spinel peridotite xenoliths from the Estancia Lote 17 locality in southern Patagonia document a strong carbonatitic metasomatism of …
Peridotite xenoliths from the Shiribeshi Seamount, Japan Sea: …
2016年9月26日 · In this study, we examine the petrological and geochemical characteristics of the Shiribeshi Seamount peridotite xenoliths and compare them with other peridotite xenoliths from the Japan Sea to understand the mantle processes and evolution beneath the back-arc basin.
Origin and significance of poikilitic and mosaic peridotite …
2014年8月23日 · Peridotite xenoliths erupted by alkali basaltic volcanoes in the western Pannonian Basin can be divided into two fundamentally contrasting groups. Geochemical characteristics of the abundant protogranular, porphyroclastic and equigranular nodules suggest that these samples originate from an old consolidated and moderately depleted lithospheric ...
Depth-dependent peridotite-melt interaction and the origin of …
2021年2月17日 · We report thermodynamic modelling results for reactions between peridotite and ascending mantle melts. Reaction between highly magnesian melt (komatiite) and peridotite leads to orthopyroxene...