Results 31 to 40 of about 296 (107)

Primary and secondary niobium mineral deposits associated with carbonatites

, 2015
This work reviews the character and origin of primary and supergene economic deposits of niobium associated with carbonatites. The Brazilian supergene deposits account for about 92% of the total worldwide production of Nb, with the primary St.
R. Mitchell
semanticscholar   +1 more source

Millennia of magmatism recorded in crustal xenoliths from alkaline provinces in Southwest Greenland

, 2016
Mantle-derived CO2-rich magma ascends rapidly through the lithospheric column, supporting upward transport of large mantle-xenoliths and xenocryst (>30vol%) loads to the (sub-)surface within days.
Nielsen, Troels, Waight, Tod Earle, Smit, Matthijs   +2 more
core   +1 more source

Supplemental Material: Water contents and hydrogen isotope compositions of amphibole in aillikites from the Tarim large igneous province, NW China: Insight into Earth’s deep water cycle

, 2023
<p>Supplemental Tables S1–S7.</p>
null et al., Zhaochong Zhang, null Wang Chang Hong   +2 more
openaire   +1 more source

Polygenic Nature of Olivines from the Ultramafic Lamprophyres of the Terina Complex (Chadobets Upland, Siberian Platform) Based on Trace Element Composition, Crystalline, and Melt Inclusion Data

, 2021
Olivine from the deep mantle-derived rocks, such as ultramafic lamprophyres, carries important information about the composition of the mantle source, the processes of mantle metasomatism, the origin of specific silicate-carbonate melts, as well as the ...
Ilya Prokopyev, Anastasiya Starikova, Alexey Ragozin, Vasily Chervyakovsky, Anna Doroshkevich   +4 more
core   +1 more source

Alkaline magmatism of the Chuktukon massif, Chadobets upland (Russia): sources, evolution of the magmas and their relation to the triassic Siberian lip [PDF]

, 2018
The petrogenesis of temporal and spatially associated carbonatitic and deeply derived carbonated alkaline silicate magmas provides an opportunity to gain insights into the nature of the deepest lithospheric mantle.
Чеботарев, Дмитрий Александрович, Николенко, Анна Михайловна, Дорошкевич, Анна Геннадьевна, Прокопьев, Илья Романович, Шарыгин, Виктор Викторович   +4 more
core   +1 more source

A fresh isotopic look at Greenland kimberlites: Cratonic mantle lithosphere imprint on deep source signal

, 2011
The North Atlantic craton in West Greenland and northern Labrador has been subjected to deep volatile-rich melting events between ca. 610 and 550 Ma that produced compositionally diverse diamond-bearing kimberlite and aillikite magmas. Whereas kimberlite
S. Tappe, D. Pearson, G. Nowell, T. Nielsen, P. Milstead, K. Muehlenbachs   +5 more
semanticscholar   +1 more source

Diamond exploration and prospectivity of Greenland. Gov Greenland Department of Geology Record 1, 228 pp.

, 2022
Greenland is dominated by cratonic blocks that provide conditions for the formation of diamonds. Pre-1.6 Ga rocks are exposed over 43% of ice-free land and many basins in younger areas evidence underlying Archean basement.
Mark Thomas Hutchison
core   +1 more source

Data on bulk rock compositions, geochemical and textural contrasts between central and marginal parts of dykes, and MELTS modeling of lamprophyre dykes in the Kola Alkaline Carbonatite Province (N Europe). [PDF]

Data Brief, 2021
Nosova AA, Kopylova MG, Sazonova LV, Vozniak AA, Lebedeva NM, Volkova GD, Peresetskaya EV.   +6 more
europepmc   +1 more source

Supplementary data to Pilbeam et al. submitted to Journal of Petrology February 2024.

Supplementary data set for manuscript submitted to Journal of Petrology , February 2024. The manuscript is entitled: “Links between calcite-kimberlite, aillikite and carbonatite in West Greenland: Numeric modeling of compositional relationships” and ...
Nielsen, Troels F.
core   +1 more source

Petrogenesis of juvenile pelletal lapilli in ultramafic lamprophyres. [PDF]

Sci Rep, 2023
Prokopyev I, Doroshkevich A, Starikova A, Kovalev S, Nugumanova Y, Izokh A.   +5 more
europepmc   +1 more source