Results 31 to 40 of about 3,074 (215)

Дуніт [Dunit]

, 2008
ДУНІ́Т – інтрузивна гірська порода, що складається майже повністю із високомагнезіального олівіну, а також вміщує до 5 % акцесорних хромшпінелідів. Д. різною мірою серпентинизований. Структура панідіоморфнозерниста, у сильно серпентинизованих різновидів – петельчаста. Тексту... ⚠️ Цей запис містить лише бібліографічні метадані.
openaire   +2 more sources

Talc‐Tempered Pottery From Bala Hissar, Kabul: An Analytical Study

Archaeometry, EarlyView.
ABSTRACT Potsherds of cooking ware excavated at Bala Hissar archaeological site in Kabul were studied using X‐ray fluorescence (XRF), scanning electron microscope‐energy dispersive X‐ray spectrometry (SEM‐EDS), Raman spectroscopy, X‐ray powder diffraction (XRPD), thermogravimetric analysis (TGA) and optical microscopy.
Parviz Holakooei, Babak Rafiei‐Alavi, Hafizullah Hazim, Hasti Pezeshkanjalili, Lara Maritan   +4 more
wiley   +1 more source

Geochemistry of rare, rare earth elements and platinum group elements in rocks of Shaman ultramafic massif (Eastern Transbaikalia)

Литосфера, 2016
The research on petrochemistry and geochemistry of rare, rare earth and platinum group elements in the rocks Shaman massif - the largest ultramafic protrusion body in eastern branch of the Baikal-Muya ophiolite belt, performed using a different of ...
F. P. Lesnov, A. I. Chernyshov, E. . E Pugacheva   +2 more
doaj   +2 more sources

Titanian Clinohumite-Bearing Peridotite from the Ulamertoq Ultramafic Body in the 3.0 Ga Akia Terrane of Southern West Greenland

Geosciences, 2019
A titanian clinohumite-bearing dunite was recently found in the Ulamertoq ultramafic body within the 3.0 Ga Akia Terrane of southern West Greenland. Titanian clinohumite occurs as disseminated and discrete grains. Titanian clinohumite contains relatively
Ikuya Nishio, Tomoaki Morishita, Kristofer Szilas, Graham Pearson, Ken-Ichiro Tani, Akihiro Tamura, Yumiko Harigane, Juan Miguel Guotana   +7 more
doaj   +1 more source

Adsorption of hexavalent uranium on dunite [PDF]

Global NEST Journal, 2013
Pollution of the environment with uranium and associated health effects to human have recently become of major concern, particularly due to the use of depleted uranium in armourbreaking bullets. Indeed, uranium in environmentally significant concentrations is found near to uranium mining and processing facilities and usually involves large volumes ...
openaire   +1 more source

Xenoliths in meteorites: Insights into the dynamics of material exchange between asteroids

Meteoritics &Planetary Science, EarlyView.
Abstract A minor fraction of meteorites contains xenoliths, that is, clasts that were formed on a different parent body than that of the host lithology. The occurrence of xenoliths is direct evidence for the exchange of material between asteroids, including exchanges between asteroids from the carbonaceous (CC) and non‐carbonaceous (NC) reservoirs ...
J. Gattacceca, B. Devouard, L. Bonal, Y. Marrocchi, A. Greshake, R. Tartèse, M. Gounelle, D. AuYang, C. Sonzogni, M. Hutson, A. Irving, C. Agee, T. Shisseh, A. Love, V. Vidal, D. Borschneck, S. A. Eckley, A. Morbidelli   +17 more
wiley   +1 more source

Estimation of the content and composition of trapped melt in dunite [PDF]

Геохимия, 2019
A method was developed for the quantitative estimation of the content of trapped melt in various dunite types and the composition of this melt on the basis of the major- and trace-element characteristics of the dunites and compositions of their chrome spinels.
B. A. Bazylev, G. V. Ledneva, Ya. V. Bychkova, N. N. Kononkova, T. G. Kuz’mina, T. V. Romashova   +5 more
openaire   +1 more source

Heterogeneity of plastic deformations of olivine in ultramafic rocks of the Baikal-Muya ophiolite belt (north-east of Baikal)

Известия Томского политехнического университета: Инжиниринг георесурсов, 2016
Relevance of the research. Permanently identified signs of plastic flow in ultramafic rocks predetermined an approach to their study as metamorphic rocks. This approach uses non-traditional method of the petrofabric analysis.
Alexey Ivanovich Chernyshov, Elena Egorovna Pugacheva   +1 more
doaj   +2 more sources

Experimental Evidence of Reaction‐Driven Fracturing and Ultramafic Rock Weakening Induced by CO2 Mineralization

Geophysical Research Letters, Volume 53, Issue 21, 16 November 2026.
Abstract Carbon sequestration in mafic and ultramafic rocks offers a pathway to mitigate CO2 ${\text{CO}}_{2}$ emissions, while mineralization could precondition rocks for critical mineral extraction. However, the reaction‐driven fracturing processes that increase permeability and weaken rock remain underexplored.
Clay E. Wood, D. Nicolas Espinoza, Nicola Tisato, Estibalitz Ukar   +3 more
wiley   +1 more source

Investigating Postseismic Creep in the Laboratory: Testing Dislocation‐Based Models for Transient Creep in the Upper Mantle

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Studies of postseismic creep often infer a strong reduction in upper‐mantle viscosity after large earthquakes, yet the microphysical mechanism responsible for this behavior remains subject of debate. Here, we present new gas‐medium apparatus experiments at 1100–1200°C on pre‐dried, annealed Åheim dunite (grain size of 400 μ ${\upmu }$m ...
D. Hein, L. N. Hansen, A. Dillman
wiley   +1 more source