Results 51 to 60 of about 2,032 (202)

Characteristics of Nigeria Inland Placer and Approaches of Exploration and Development —Take the Rare Polymetallic Placer of Nb-Ta-Sn in Jos Plateau as an Example

Kuangchan zonghe liyong
Rare metal placer deposits and gold placer are scattered in Nigeria's inland region. The spacial order of distribution is belt-like. Placers are of complex compositions.
Haifeng LIU, Bin DENG, Yanghao GUO, Baishun LIU, Shuai YUAN, Hongxin ZHANG   +5 more
doaj   +1 more source

Sustainable Ceramic Membranes from Clays and Mining Wastes by Rapid Sintering Process [PDF]

Materials Research
This study characterized wastes from scheelite and columbite-tantalite mining, as well as kaolin processing, to produce microfiltration membranes for wastewater treatment using a fast-sintered process.
Hellen C. T. Firmino, Déborah dos S. Gomes, Vanderlane C. da Silva, Ieda M. G. Santos, Helio L. Lira, Lisiane N. L. Santana, Romualdo R. Menezes, Gelmires de A. Neves   +7 more
doaj   +1 more source

Electrophysical properties of the multicomponent PbFe1/2Nb1/2O3 ceramics doped by Li [PDF]

Archives of Metallurgy and Materials, 2019
The paper presents the results of research on the influence of sintering temperature on microstructure, DC electrical conductivity, dielectric, ferroelectric and magnetic properties of PbFe1/2Nb1/2O3 ceramics doped by Li in the amount of 5.0% wt., in the
D. Bochenek, P. Niemiec, M. Adamczyk, Z. Stokłosa   +3 more
doaj   +1 more source

Optical Properties of CaNb₂O₆ Single Crystals Grown by OFZ*

Crystals, 2021
CaNb2O6 single crystals with an orthorhombic columbite structure are grown via an optical floating zone (OFZ) method. The as-grown crystals are colorless and free of low-angle grain boundaries and inclusions.
Guanlin Feng, Liang Li, Dapeng Xu
doaj   +1 more source

Mineralogy and Formation of a Platinum Placer Deposit, Southern South Island, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
Placer platinum group minerals (PGM), with subordinate detrital gold, have been concentrated in Pleistocene coastal sands near the present Foveaux Strait shoreline. This study characterises the PGM in what is New Zealand's only identified PGM deposit.
Marshall Palmer, Dave Craw
wiley   +1 more source

Mineralization Characteristics of the Li‐rich Muscovite Granite in the Mufushan Batholith, Central China: Insights into the Rare Metal Mineralization Models of Batholithic Complex

Acta Geologica Sinica - English Edition, Volume 100, Issue 1, Page 137-155, February 2026.
Abstract Elucidating the mineralization mechanisms of individual granitic stages and tracing magmatic evolution processes are critical for establishing mineralization models of large‐scale batholiths. The Mufushan granitoid batholith, renowned for multistage magmatism and large‐scale rare metal mineralization, mainly comprises biotite, two‐mica, and ...
Hao ZHANG, Peng LI, Jiankang LI, Lulu YUAN, Pengfei JIANG, Ze LIU, Jin YIN, Zhuo CHEN   +7 more
wiley   +1 more source

Work index evaluation of Rayfield-Jos columbite mineral for effective processing and recovery of niobium and tantalum [PDF]

, 2023
Physical characterization on primary or secondary minerals is imperative. One of such physical analyses is the grindability characteristics and/or work index determination.
S.O. Adeosun, Popoola, A.P.I., A.P.I. Popoola, Adeosum, S.O., Nzeh, Nnaemeka Stanislaus, Okanigbe, D., A.A. Adeleke, Adeleke, A.A., D. Okanigbe, Nnaemeka Stanislaus Nzeh   +9 more
core   +1 more source

Qualitative delineation of airborne magnetic and radiometric structures associated with cassiterite-columbite mineralization of Barikin Ladi Tin field, Jos North-Central Nigeria

Discover Geoscience
This study uses airborne magnetic and radiometric data to delineate the structures associated with Cassiterite-Columbite Mineralization of high resolution of NGSA data Tin field, Jos North Central Nigeria.
M. Umar, A. L. Ahmed, J. O. Osumeje, S. S. Magaji   +3 more
doaj   +1 more source

Nigerite from the Rosendal pegmatite and aplites, Kemiö island, southwestern Finland [PDF]

Bulletin of the Geological Society of Finland, 1977
Nigerite occurs as small hexagonal platy crystals in the Rosendal pegmatite and in associated aplitic veins on Kemiö island, southwestern Finland. This is the first reported occurrence of nigerite in the Baltic Shield.
E.A.J. Burke, P. Lof, H.P. Hazebroek
doaj   +1 more source

New investigation of the magnetic structure of CoNb2O6 columbite [PDF]

Journal of Applied Physics, 2011
The structural and magnetic properties of the CoNb2O6 compound have been investigated with a particular interest in their low-dimensional magnetic behavior which is characterized by the presence of weakly interacting ferromagnetic chains. We investigate this cobalt niobate by combining magnetic measurements; x-ray and neutron diffraction (ND).
Sarvezuk, P. W. C., Kinast, E. J., Colin, Claire, Gusmao, M. A., da Cunha, J. B. M., Isnard, Olivier   +5 more
openaire   +2 more sources