Results 11 to 20 of about 145 (96)

Ediacaran‐Ordovician Magmatism and REE Mineralization in the Wet Mountains, Colorado, USA: Implications for Failed Continental Rifting

Tectonics, Volume 42, Issue 4, April 2023., 2023
Abstract Structures associated with Ediacaran‐Ordovician alkaline magmatism and the timing of rare earth element (REE) mineralization in the Wet Mountains, CO, were analyzed using field, geophysical, and U‐Th‐Pb isotope methods to interpret their tectonic setting in the context of previously proposed rift models. The Wet Mountains are known for thorium
Benjamin P. Magnin, Yvette D. Kuiper, Eric D. Anderson   +2 more
wiley   +1 more source

Probing luminescence of rare earth ions in natural pink fluorites using Raman microscopes

Journal of Raman Spectroscopy, Volume 53, Issue 8, Page 1464-1470, August 2022., 2022
Raman microscopy allows to observe high‐resolution emission bands of rare earth impurities in natural fluorites and by extension also in other minerals. This is demonstrated in this work for spectra of various pink fluorites obtained with Raman microscopes. Abstract It is well‐known that many natural fluorite crystals contain rare earth ions.
Hans Hagemann, Sareh Ayoubipour, Teresa Delgado, Cédric Schnyder, Edwin Gnos   +4 more
wiley   +1 more source

Global earth mineral inventory: A data legacy

Geoscience Data Journal, Volume 8, Issue 1, Page 74-89, June 2021., 2021
The ‘Global Earth Mineral Inventory’ (GEMI) can be considered as a network with every node and edge representing some feature of the datasets. Exploring combinations of the network gives the researcher a particular view of the data required for the task at hand.
Anirudh Prabhu, Shaunna M. Morrison, Ahmed Eleish, Hao Zhong, Fang Huang, Joshua J. Golden, Samuel N. Perry, Daniel R. Hummer, Jolyon Ralph, Simone E. Runyon, Kathleen Fontaine, Sergey Krivovichev, Robert T. Downs, Robert M. Hazen, Peter Fox   +14 more
wiley   +1 more source

Late hydrothermal mineralization in a fenitic halo of the Ilmenogorsk alkaline complex (South Urals) [PDF]

Минералогия
Late hydrothermal veins exposed in the northern wall of the Novy peeble quarry are studied in a fenitic halo of the western contact of the Ilmenogorsk miaskite complex (South Urals) using scanning electron microscopy, Raman spectroscopy and X-ray ...
M.A. Rassomakhin, E.V. Belogub, M.S. Avdontceva, V.N. Bocharov   +3 more
doaj   +1 more source

Rare Earth Elements in Mineral Deposits: Speciation in Hydrothermal Fluids and Partitioning in Calcite

Geofluids, Volume 2018, Issue 1, 2018., 2018
Studying the speciation and mineral‐fluid partitioning of the rare earth elements (REE) allows us to delineate the key processes responsible for the formation of economic REE mineral deposits in natural systems. Hydrothermal REE‐bearing calcite is typically hosted in carbonatites and alkaline rocks, such as the giant Bayan Obo REE deposit in China and ...
Emily P. Perry, Alexander P. Gysi, Paolo Fulignati   +2 more
wiley   +1 more source

Arrheniusite-(Ce), CaMg[(Ce₇Y₃)Ca₅](SiO₄)₃(Si₃B₃O₁₈)(AsO₄)(BO₃)F₁₁, a new member of the vicanite group, from the Östanmossa mine, Norberg, Sweden

, 2021
Arrheniusite-(Ce) is a new mineral (IMA 2019-086) from the Östanmossa mine, one of the Bastnäs-type deposits in the Bergslagen ore region, Sweden. It occurs in a metasomatic F-rich skarn, associated with dolomite, tremolite, talc, magnetite, calcite ...
Förster, Hans-Jürgen,, Andersson, Ulf B.,, Bonazzi, Paola,, Bindi, Luca,, Holtstam, Dan,   +4 more
core   +1 more source

The origin of secondary heavy rare earth element enrichment in carbonatites: Constraints from the evolution of the Huanglongpu district, China [PDF]

, 2018
The silico-carbonatite dykes of the Huanglongpu area, Lesser Qinling, China, are unusual in that they are quartzbearing, Mo-mineralised and enriched in the heavy rare earth elements (HREE) relative to typical carbonatites.
Wenlei Song, Jeffries, Teresa, Kopriva, Antonin, Chen, X, Cangeloosi, D, D. Cangelosi, Spratt, John, Smith, Martin; id_orcid, Kynicky, Jindrich, Smith, Martin, Smith, M, T. Jeffries, Wenlei, S, Brtnicky, Martin, Cheng, Xu, Jeffries, T, Cheng Xu, Kopriva, A, J. Spratt, A. Kopriva, Brnicky, M, Spratt, J, Song, Wenlei, J. Kynicky, Kynicky, J, Cangelosi, Delia, M. Smith, M. Brtnicky   +27 more
core   +1 more source

Rare earth elements and yttrium minerals in altered granite-porphyry and hosting high-alumina schists in the Pellapahk Cu-Mo occurrence (Kolmozero-Voronya Belt)

Vestnik MGTU
Rare Earth Elements (REE) and yttrium phosphates monazite-(Ce) and xenotime-(Y), fluorine carbonates synchysite-(Ce) and parisite-(Ce), silicate allanite-(Ce) have been studied in the metamorphic rocks in the area of the Pellapahk Cu-Mo porphyry ...
Kalinin A. A., Khachatryan M. G., Savchenko Ye. E.   +2 more
doaj   +1 more source

A mineralização de parisita – (Ce) associada ao carbonatito Fazenda Varela (Correia Pinto, SC). [PDF]

, 2013
O carbonatito Fazenda Varela é um ferrocarbonatito que possui altos teores de ETR (>1%), que são elementos considerados estratégicos por muitos países devido à importância econômica.
Manfredi, Tamara Reginatto, Tamara Reginatto Manfredi   +1 more
core   +2 more sources

Rare Earth Fluorocarbonates in Carbonaceous Shales of the Ishlya Graben (Western Slope of the Southern Urals)

Georesursy
The aim of this work is to characterize rare earth fluorocarbonates, first discovered in carbonaceous shales of the Ishlya graben, and to develop an acceptable genetic model of their formation.Riftogenic formations are represented by interbedding of ...
S. G. Kovalev, S. S. Kovalev
doaj   +1 more source