Results 91 to 100 of about 9,905 (218)
Mantle melting versus mantle metasomatism – “The chicken or the egg” dilemma
Chemical Geology, 2017 AbstractMost eclogitic mantle xenoliths brought to the surface exhibit a certain degree of enrichment with incompatible elements, usually attributed to the effect of mantle metasomatism by a putative metasomatic fluid. The metasomatic overprint is represented mainly by enrichments in Na, K, Ba, Ti and LREE and the original source of this fluid remains ...
Kiseeva, Ekaterina S. +3 more
openaire +3 more sources
Crustal Structure Across the Okavango Rift, Botswana: The SEISORZ Wide‐Angle Seismic Experiment
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.Abstract The Okavango Rift Zone (ORZ) is an incipient continental rift in Botswana at the terminus of the Southwestern Branch of the East African Rift System. The lack of syn‐rift magmatism and tectonic processes overprinting pre‐rift structures provide an opportunity to investigate incipient‐stage rift processes and the role of pre‐existing structures
J. Pablo Canales +7 more
wiley +1 more source
A review of volatiles in the Martian interior [PDF]
, 2016 Multiple observations from missions to Mars have revealed compelling evidence for a volatile-rich Martian crust. A leading theory contends that eruption of basaltic magmas was the ultimate mechanism of transfer of volatiles from the mantle toward the ...
Baratoux, David +10 more
core +1 more source
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.Abstract We present elemental geochemistry and multiple isotopic systematics (Re‐Os, Lu‐Hf, Sm‐Nd and Sr) for mantle peridotite xenoliths from Lashaine in northern Tanzania. We use the data to examine how the major Proterozoic tectono‐thermal events that affected the crust of the western Tanzanian craton are imprinted on the lithospheric mantle in the ...
Sheng‐Hua Zhou +6 more
wiley +1 more source
Geophysical Research Letters, 2018 The history of Indian continental subduction beneath Asian plate remains unclear. Miocene ultrapotassic rocks in southern Tibet, with extremely enriched isotopes, have often been used to trace mantle metasomatism and geodynamic processes associated with ...
Lu‐Lu Hao +8 more
doaj +1 more source
Solid Earth Sciences, 2020 The Ivrea Zone of northwest Italy exposes a section of the lower crust and lithospheric mantle deformed during the Variscan Orogeny, where a series of carbonated alkaline pipes was emplaced over a time span of ca.
Christopher M. Gonzalez +3 more
doaj +1 more source
The role of continental subduction in mantle metasomatism and carbon recycling revealed by melt inclusions in UHP eclogites. [PDF]
Sci Adv, 2023 Borghini A +7 more
europepmc +1 more source
Insights into Li and Li isotope cycling and sub-arc metasomatism from veined mantle xenoliths, Kamchatka [PDF]
, 2009 Harzburgitic xenoliths cut by pyroxenite veins from Avachinsky volcano, Kamchatka, are derived from the sub-arc mantle and record element transfer from the slab to the arc. Olivine and orthopyroxene in the harzburgites have Li isotopic compositions (δ7Li
Halama, Ralf +3 more
core +1 more source
Oxygen Isotope Variations of Basaltic Lavas and Upper Mantle Rocks [PDF]
, 2001 This chapter summarizes the oxygen isotope geochemistry of terrestrial basalts and their mantle sources, including the conceptual framework for interpreting such data and the phenomenology of known variations.
Eiler, John M.
core
Os isotopic constraints on crustal contamination in Auckland Volcanic Field basalts, New Zealand [PDF]
, 2016 The Auckland Volcanic Field (AVF) represents the youngest and northernmost of three subjacent Quaternary intraplate basaltic volcanic fields in the North Island, New Zealand. Previous studies on AVF eruptive products suggested that their major- and trace-
Hopkins, Jenni L. +5 more
core +1 more source