Results 31 to 40 of about 3,013 (217)

Gold, platinum and palladium enrichments in arcs: role of mantle wedge, arc crust and halogen-rich slab fluids [PDF]

E3S Web of Conferences, 2019
Arc-related magmas are frequently enriched in Au, Pt and Pd in respect to MORB and OIB igneous suites. Magmatic arcs commonly host large-scale hydrothermal Au and Au-Cu and PGE mineralization related to young volcanic systems and zoned ultramafic ...
Kepezhinskas Pavel, Kepezhinskas Nikita, Berdnikov Nikolai   +2 more
doaj   +1 more source

Patched removal of the mantle lithosphere under orogens: A systematic numerical study

Frontiers in Earth Science, 2023
Delamination or convective thinning could cause large-scale and complete removal of the mantle lithosphere under orogens. However, geological and geophysical observations suggest that patched removal of the mantle lithosphere has occurred in some orogens,
Tian Lei, Jie Liao, Jie Liao, Jie Liao, Zhong-Hai Li, Mian Liu, Lun Li   +6 more
doaj   +1 more source

Titanium substitution mechanisms in forsterite [PDF]

, 2007
Ti K-edge X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectra, together with atomic scale calculations, indicate that Ti occupies the Si site in anhydrous forsterite.
Herman, J., Walker, Andrew M., Hermann, Joerg, Walker, A., Gale, Julian D., Walker, A. M., Gale, J. D., Foran, Garry J, Berry, A. J., Berry, AJ, Foran, Garry J., Hermann, J, Foran, G., Hermann, J., Foran, G. J., O'Neill, HStC, Walker, AM, Foran, GJ, O'Neill, Hugh, Berry, A., Gale, Julian, Berry, Andrew John, Gale, Julian D, Walker, Andrew, Berry, Andrew J., O'Neill, Hugh St.C., O'Neil, H., Hermann, Jörg, O'Neill, HSt.C, Gale, JD, O'Neill, H. S.   +30 more
core   +1 more source

Petrogenesis and Sr-Nd isotope Geochemistry of Neogene Igneous Rocks in the Goloumak Area, South of Kerman, Iran [PDF]

Journal of Sciences, Islamic Republic of Iran, 2023
The study area is near Goloumak village, 30 km south of Kerman. These rock units consist of acidic rhyolite and dacite, as well as intermediate andesite, basalt, and trachy-andesite.
Farzaneh Arzhangnegad, gholamreza ghadami, Mohammad Poosti, Mohammad Fadaeian   +3 more
doaj   +1 more source

Carbonatite metasomatism overprinted by silicate melt metasomatism in the mantle beneath the West Eifel volcanic field [PDF]

European Journal of Mineralogy
The texture and mineral compositions of mantle xenoliths from the West Eifel volcanic field (WEVF) reveal three distinct mantle events. The first, identified in LREE-depleted and isotopically depleted anhydrous (type Ib) xenoliths, resulted from partial ...
B. E. Bromley, S. Ma, S. Ma, C. S. J. Shaw   +3 more
doaj   +1 more source

Global Patterns in Cratonic Mid‐Lithospheric Discontinuities From Sp Receiver Functions

Geochemistry, Geophysics, Geosystems, 2021
The goal of this study is to constrain the origins of layering in the seismic velocity structure within the cratonic mantle lithosphere (i.e. mid‐lithospheric discontinuities [MLDs]).
Hannah E. Krueger, Isabella Gama, Karen M. Fischer   +2 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

, 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

XENOLITH GARNETS FROM MIR KIMBERLITE PIPE: CHEMICAL COMPOSITION AND EVIDENCE OF METASOMATIC PROCESSES IN THE LITHOSPHERE MANTLE

Геодинамика и тектонофизика, 2022
This paper reports the results on the composition of lithosphere mantle under the Mirny kimberlite field. The authors investigated 57 samples of the mantle xenoliths collected from the Mir pipe.
T. V. Kalashnikova, S. I. Kostrovitsky, K. A. Sinitsyn, E. E. Yudintseva   +3 more
doaj   +1 more source

Nickel-rich metasomatism of the lithospheric mantle by pre-kimberlitic alkali-S–Cl-rich C–O–H fluids [PDF]

, 2013
Metasomatism of the lithospheric mantle sometimes produces unusual assemblages containing native metals and alloys, which provide important insight into metasomatic processes in the mantle.
Karsten Goemann (14737597), Vadim Kamenetsky (14740705), Giuliani, A (15540863), Kendrick, MA (15561167), Phillips, D (15488693)   +4 more
core   +2 more sources

Characterizing Peridotite Xenoliths From Southern Vietnam: Insight Into the Underlying Lithospheric Mantle

Geochemistry, Geophysics, Geosystems, 2023
We present data for lithospheric mantle xenoliths sampled from two alkali basalts in south‐central Vietnam, Pleiku and Xuan Loc, including fertile spinel peridotites.
Kirby P. Hobbs, Lynne J. Elkins, John C. Lassiter, Nguyen Hoang, Caroline M. Burberry   +4 more
doaj   +1 more source