Results 21 to 30 of about 115,962 (208)

Mafic alkaline metasomatism in the lithosphere underneath East Serbia: evidence from the study of xenoliths and the host alkali basalts [PDF]

, 2010
Effects of mafic alkaline metasomatism have been investigated by a combined study of the East Serbian mantle xenoliths and their host alkaline rocks.
H. Downes, V. Höck, V. Cvetković, D. Prelević, M. Lazarov, Cvetkovic, V., Lazarov, M., Downes, Hilary, Hock, V., Prelevic, D.   +9 more
core   +1 more source

Martian magmatism from plume metasomatized mantle [PDF]

Nature Communications, 2018
AbstractDirect analysis of the composition of Mars is possible through delivery of meteorites to Earth. Martian meteorites include ∼165 to 2400 Ma shergottites, originating from depleted to enriched mantle sources, and ∼1340 Ma nakhlites and chassignites, formed by low degree partial melting of a depleted mantle source.
Day, James, Tait, Kimberly, Udry, Arya, Moynier, Frédéric, Liu, Yang, Neal, Clive   +5 more
openaire   +5 more sources

Relicts of Neo-Tethyan mantle wedge in the Indo-Burma Range, India: Record of carbonate metasomatism and Neo-Tethyan mantle evolution

Results in Earth Sciences, 2023
Several different geochemical signatures, i.e., mid-oceanic ridge (MOR) and supra subduction zone (SSZ), are frequently reported from ophiolite belts. Such bi-modal geochemical signatures are generally interpreted in terms of formation in two contrasting
Oinam Kingson, Yongsheng Liu, Rajneesh Bhutani, Mike Widdowson   +3 more
doaj   +1 more source

Multidisciplinary Modeling of Mantle Lithosphere Structure Within the Superior Craton, North America

Geochemistry, Geophysics, Geosystems, 2021
New 3D multi‐azimuthal receiver function analysis identified four regional seismic discontinuities dipping at 7–13° within the mantle of the Superior craton of North America; most are discordant to known major upper crustal structures.
David B. Snyder, Geneviève Savard, Bruce A. Kjarsgaard, Aeron Vaillancourt, Phillips C. Thurston, John A. Ayer, Eric Roots   +6 more
doaj   +1 more source

Insights into the Tethyan mantle heterogeneity: Trace element evidence from the Karakaya Complex, Central Anatolia

Geosystems and Geoenvironment, 2023
Highlights: • Strong Nb-kick originates from metasomatized oceanic lithospheric mantle (OLM). • Metasomatized OLM is a plume-related material causing Tethyan mantle heterogeneity.
Kaan Sayit
doaj   +1 more source

Identifying mantle carbonatite metasomatism through Os-Sr-Mg isotopes in Tibetan ultrapotassic rocks [PDF]

, 2015
Mantle-derived magmas at convergent plate boundaries provide unique insights into the nature of materials subducted to and recycled from depths. Here we present a study of Os–Sr–Mg isotopes on the Oligocene–Miocene ultrapotassic rocks aimed at better ...
Wang, Q., DePaolo, D.J., Widom, Elisabeth, Xu, J.F., Widom, E., Mo, Xuanxue, Niu, Yaoling, Wang, Qing, Zhan, Z.D., Mo, X.X., Liu, Dong, DePaolo, Donald J., Zhao, Zhidan, Teng, Fang-Zhen, Ke, S., Xu, Ji-Feng, Teng, F.-Z., Zhu, D.-C., Zhu, Di-Cheng, Ke, Shan, Liu, D.   +20 more
core   +1 more source

Ultramafic xenoliths from the Bearpaw Mountains, Montana, USA: evidence for multiple metasomatic events in the lithospheric mantle beneath the Wyoming craton [PDF]

, 2004
Ultramafic xenoliths in Eocene minettes of the Bearpaw Mountains volcanic field (Montana, USA), derived from the lower lithosphere of the Wyoming craton, can be divided based on textural criteria into tectonite and cumulate groups. The tectonites consist
James, D., MacDonald, R., Bodinier, J.L., Mason, P.R.D., Cox, K.G., Downes, Hilary, Hill, P.G., Upton, B.G.J., Hearn, B.C.   +8 more
core   +1 more source

Mantle xenoliths and host basalts record the Paleo-Asian oceanic materials in the mantle wedge beneath northwest North China Craton

Solid Earth Sciences, 2019
Oceanic subduction is an important trigger for mantle heterogeneity, which further increases melt production and controls the compositions of intraplate basalts. Such a role played by the (Paleo-) Pacific subduction have been extensively studied and well
Hong-Kun Dai, Jian-Ping Zheng
doaj   +1 more source

Post-collisional Tertiary–Quaternary mafic alkalic magmatism in the Carpathian–Pannonian region: a review [PDF]

, 2004
Mafic alkalic volcanism was widespread in the Carpathian–Pannonian region (CPR) between 11 and 0.2 Ma. It followed the Miocene continental collision of the Alcapa and Tisia blocks with the European plate, as subduction-related calc-alkaline magmatism was
Szakács, A., Seghedi, I., Downes, Hilary, Vaselli, O., Balogh, K., Pécskay, Z., Vaselli, Orlando   +6 more
core   +1 more source

Long-term memory of subduction processes in the lithospheric mantle: evidence from the geochemistry of basic dykes in the Gardar Province of South Greenland [PDF]

, 2002
The rift-related magmas of the Proterozoic Gardar Igneous Province were emplaced across the contact between the South Greenland Archaean craton and the Palaeoproterozoic Ketilidian mobile belt.
R. M. Ellam, Goodenough, K.M., Ellam, R.M., K. M. Goodenough, Ellam, R, Upton, B.G.J., B. G. J. Upton   +6 more
core   +1 more source