Results 11 to 20 of about 10,059 (219)

Carbonate- and silicate-metasomatized mantle beneath Himalayan-Tibetan orogenic belt [PDF]

Communications Earth & Environment
The extreme geochemical enrichment of post-collisional potassium-rich lava in the Alpine-Himalayan orogenic belt has led researchers to hypothesize that enrichment is inherited from a metasomatized mantle source potentially incorporating crustal ...
Weikai Li, Zhiming Yang, Zoltán Zajacz, Limin Zhou, Zengqian Hou   +4 more
doaj   +2 more sources

The mantle source of REE-rich alkaline silicate magmas can be enriched by continent-derived sediment subduction [PDF]

Nature Communications
Alkaline silicate intrusions host large rare-earth-element (REE) resources, yet the precise origin of the mantle enrichment that generates these magmas remains unresolved.
Kun-Feng Qiu, Zheng-Yu Long, Rolf L. Romer, Ralf Halama, A. E. Williams-Jones, Hao-Cheng Yu, Shan-Shan Li, Ming-Qian Wu, Jun Deng   +8 more
doaj   +2 more sources

The role of C-O-H-F-Cl fluids in the making of Earth’s continental roots [PDF]

Nature Communications
The cratonic ‘roots’ of Earth’s major continents extend to depths of over 160 km and have remained stable for more than 2.5 billion years due to buoyant, refractory harzburgites formed by Archean mantle melting.
S. A. Gibson, C. J. Jackson, J. C. Crosby, J. A. F. Day   +3 more
doaj   +2 more sources

Mélange dehydration and melting beneath South Sandwich Islands arc [PDF]

Nature Communications
Mechanisms regulating material transfer from subducted slabs to arc magmas remain debated, centered on metasomatized mantle wedge interactions versus mélange mobilization at the slab-mantle interface.
Yunchao Shu, Sune G. Nielsen, Veronique Le Roux, Danielle Santiago Ramos, Jerzy Blusztajn, Maureen Auro, Phil T. Leat, Tristan J. Horner   +7 more
doaj   +2 more sources

Origin of Fe‐Ca‐Metasomatism in Exhumed Mantle Rocks at the MARK Area (23°N, ODP Leg 153) and Implications on the Formation of Ultramafic‐Hosted Seafloor Massive Sulfide Deposits

Geochemistry, Geophysics, Geosystems, 2023
At Mid‐Ocean Ridges, hot, reduced, acidic, and metal‐rich fluids are responsible for the formation of ultramafic‐hosted seafloor massive sulfide deposits (UM‐SMSs), where mantle exhumation efficiently operates.
R. Coltat, M. Andreani, C. G. C. Patten, M. Godard, B. Debret, J. Escartin   +5 more
doaj   +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
Abidin, M.S.Z., Codemard, C.A., Dupriez, P., Farrell, C., Jeong, Y., Ji, J., Maran, J.-N., Nilsson, J., Payne, D.N., Richardson, D.J., Sahu, J.K., Yoo, S.   +11 more
core   +4 more sources

Metasomatism in oceanic and continental lithospheric mantle: introduction [PDF]

Geological Society, London, Special Publications, 2007
s CD. BODINIER, J.-L., MENZIES, M. A., SHIMIZU, N., FREY, F. A. & MCPHERSON, E. 2004. Silicate, hydrous and carbonate metasomatism at Lherz, France: contemporaneous derivatives of silicate melt–harzburgite reaction. Journal of Petrology, 45, 299–320. BONADIMAN, C., BECCALUVA, L., COLTORTI, M. & SIENA, F. 2005.
COLTORTI, Massimo, Gregoire M.
openaire   +2 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

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.
Cvetkovic, V., Downes, Hilary, Hock, V., Lazarov, M., Prelevic, D.   +4 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