scholarly journals Preliminary Study of Scandium Enrichment in Lateritic Profile from Weathered Ultramafic Rock in Lapaopao Area Kolaka Regency of Southeast Sulawesi

2021 ◽  
Vol 921 (1) ◽  
pp. 012040
Author(s):  
S Onggang ◽  
A Maulana ◽  
Sufriadin ◽  
U R Irfan
Keyword(s):  
Rare Earth ◽  
Solid Oxide Fuel Cells ◽  
Ultramafic Rock ◽  
Minor Element ◽  
Nickel Laterite ◽  
Nickel Deposit ◽  
Lateritic Nickel ◽  
Preliminary Study ◽  
Drill Holes ◽  
Lateritic Profile

Abstract Scandium is one of the rare earth elements which is currently widely used for various needs such as the aerospace industry, solid oxide fuel cells, electronics industry and in metallurgical applications. Generally, Scandium appears in small amounts so its structural role in the host minerals cannot be readily identified. Some studies reported the scandium extraction from lateritic nickel deposit where may contain considerable amount of scandium in addition to nickel and cobalt. Preliminary research of scandium enrichment has been investigated from the ultramafik rock indicates that an enrichment of scandium concentration was found in the red limonite. The aim of this study was to investigate the potentially enrichment of scandium mineral from nickel laterite in Lapaopao Area. There are a total of 38 samples from 1 (one) diamond drill holes which represent the limonite, saprolite and bedrock profiles have been collected and studied to investigate the distribution pattern of Sc grades within the lateritic profile. These samples are being analized by XRF for major and minor element and ICP-OES method for rare earth element assaying. The study has confirmed that scandium is enriched in limonite layer of weathered ultramafic laterite profile. The scandium content from the ultramafic bedrock is 15 ppm and has enriched until 81 ppm of scandium in the limonite layer.

scholarly journals The Loma de Hierro Ni-laterite deposit (Venezuela): Mineralogical and chemical composition

2020 ◽  
Vol 72 (3) ◽  
pp. A050620
Author(s):  
Cristina Domènech ◽  
Salvador Galí ◽  
Josep M. Soler ◽  
Marite P. Ancco Ancco ◽  
Williams Meléndez ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Ultramafic Rocks ◽  
Nickel Laterite ◽  
Weathering Profile ◽  
Geochemical Composition ◽  
Fe Content ◽  
Element Bearing ◽  
Silicate Deposits ◽  
Lateritic Profile

Nickel laterite deposits developed on ultramafic rocks have traditionally been a significant source of Ni and Co and recently of Sc. Although the Loma de Hierro deposit (Venezuela) has been in operation for more than 50 years, it lacks detailed studies on the mineralogical and geochemical composition of the lateritic profile. In this study, we present a geochemical and mineral description of the main carrier phases of Ni and Co in a complete profile of the deposit. The selected weathering profile has been developed from a partially serpentinized harzburgitic protolith and has a well-developed saprolitic horizon covered by a thin limonitic horizon. The geochemical signature of the profile is characterized by a significant Mg and Si decrease towards the top of the saprolite, with a clearly visible Mg discontinuity. The main Ni-bearing minerals are secondary serpentine (1–4 wt.% NiO) and kerolite-pimelite-dominated garnierite mixtures with serpentine (18–22 wt.% NiO). Limonite is rich in goethite (0–1.85 wt. % NiO), gibbsite, and Mn-oxy-hydroxides. The latter have intermediate compositions between lithiophorite and asbolane (2–13 wt.% CoO). The highest Sc grades (40–68 ppm) were observed in the limonite with amounts positively correlated with Fe content. Rare earth elements are mainly concentrated in the upper part of the saprolite horizon (60–80 ppm), while they have a lower content in the limonite (7–45 ppm). In this horizon, rare earth elements are clearly associated with Fe, indicating adsorption and/or coprecipitation. This association was not observed in the saprolite, suggesting that other minerals (e.g., clay minerals) are controlling their concentration; more information is needed to identify the rare earth element-bearing minerals. The lateritic profile of Loma de Hierro can be classified as representative of hydrated Mg silicate deposits, and was formed in a context of continuous tectonic uplift and a low water table conditions favoring the development of a thick saprolitic horizon and the precipitation of kerolite-pimelite-dominated garnierites.

Identification of Dacitic Tephra by Activation Analysis of their Primary Mineral Phenocrysts

1973 ◽  
Vol 3 (2) ◽  
pp. 307-315 ◽  
Author(s):  
M.J. Dudas ◽  
M.E. Harward ◽  
R.A. Schmitt
Keyword(s):  
Rare Earth ◽  
Activation Analysis ◽  
Pacific Northwest ◽  
Late Quaternary ◽  
Minor Element ◽  
Transition Elements ◽  
Pyroclastic Deposits ◽  
Element Abundances ◽  
The Pacific ◽  
Primary Mineral

AbstractPrimary mineral phenocrysts from eight different late Quaternary pyroclastic deposits were fractionated for neutron-activation analysis with the purpose of characterizing each of the deposits on the basis of trace and minor element compositions. In hornblende separates, contents of several rare earth and transition elements were found to be distinctive for the Mazama, Glacier Peak, and several St. Helens deposits. In magnetites, abundances of transition elements are characteristic and serve as good discriminants for the pyroclastic deposits examined in this investigation. Contents of transition and rare earth elements in hyperthenes also appear useful in distinguishing volcanic ash deposits. Trace and minor element abundances in plagioclase phenocrysts did not appear adequate for identification of pyroclastics due to elemental depletion and similarity of contents for feldspar separates. It was found that contents of Sm and Yb in hornblende phenocrysts would serve to distinguish between several pyroclastic deposits from the Pacific Northwest.

Rare-earth and minor element distribution and petrographic features of fluorites and associated Mesozoic limestones of northwestern Sicily

1981 ◽  
Vol 32 (1-4) ◽  
pp. 255-269 ◽  
Author(s):  
A. Bellanca ◽  
P. Di Salvo ◽  
P. Möller ◽  
R. Neri ◽  
F. Schley
Keyword(s):  
Rare Earth ◽  
Minor Element ◽  
Element Distribution

Rare-earth materials for Solid Oxide Fuel Cells (SOFC)

2005 ◽  
pp. 1-43 ◽  
Author(s):  
Natsuko Sakai ◽  
Katsuhiko Yamaji ◽  
Teruhisa Horita ◽  
Yue Ping Xiong ◽  
Harumi Yokokawa
Keyword(s):  
Rare Earth ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel

Nanotubes of rare earth cobalt oxides for cathodes of intermediate-temperature solid oxide fuel cells

2010 ◽  
Vol 195 (7) ◽  
pp. 1786-1792 ◽  
Author(s):  
Joaquín Sacanell ◽  
A. Gabriela Leyva ◽  
Martín G. Bellino ◽  
Diego G. Lamas
Keyword(s):  
Rare Earth ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Cobalt Oxides ◽  
Oxide Fuel

Cathodes based on rare-earth metal nickelate ferrites prepared from industrial raw materials for solid oxide fuel cells

2014 ◽  
Vol 50 (6) ◽  
pp. 548-553 ◽  
Author(s):  
I. Yu. Yaroslavtsev ◽  
N. M. Bogdanovich ◽  
G. K. Vdovin ◽  
T. A. Dem’yanenko ◽  
D. I. Bronin ◽  
...  
Keyword(s):  
Rare Earth ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Rare Earth Metal ◽  
Raw Materials ◽  
Earth Metal ◽  
Solid Oxide ◽  
Oxide Fuel

Sulfides in Leg 37 drill core from the Mid-Atlantic Ridge

1977 ◽  
Vol 14 (4) ◽  
pp. 674-683 ◽  
Author(s):  
Wallace H. MacLean
Keyword(s):  
Deep Ocean ◽  
Minor Element ◽  
Major Elements ◽  
Drill Core ◽  
Minor Phase ◽  
Basalt Glass ◽  
Mid Atlantic Ridge ◽  
A Minor ◽  
Drill Holes ◽  
Good Agreement

Sulfides in 27 samples of drill core from four Leg 37 drill holes have been studied. Pyrite is the most abundant sulfide, averaging 0.39 ± 0.51% of basalt samples. Also present in basalt are sparse (0.0001%) and small (< 8 μm) magmatic globules of finely intergrown pyrrhotite, pentlandite, and chalcopyrite-iss, as well as a few globules composed of only one of these minerals. Larger and more abundant magmatic globules are present in gabbro and peridotite; pyrite is a minor phase in these rocks.Fe, Ni. Cu. and S are the major elements, and Co a minor element in the globules. Averaged Ni/Cu ratios for globules are: 3.3 (peridotite), 1.0 (gabbro). and 0.4 (basalt), the decrease in ratio indicating less normative olivine in the respective parent magmas when the globules were formed.Sulfides in globules in peridotite, and to a lesser extent in gabbro, form distinct grains free of inclusions, and appear to have equilibrated to below 300 °C. In basalt the minerals are finely intergrown and indicate quenching above about 600 °C, with local equilibration at lower temperatures.Three analyses of sulfur in basalt glass ranged from 930 to 1160 ppm, in good agreement with other analyses of deep-ocean basalts.

Petrology of Tertiary lavas from the western Kangerdlugssuaq area, East Greenland

1982 ◽  
Vol 45 (337) ◽  
pp. 211-218 ◽  
Author(s):  
J. J. Fawcett ◽  
J. Gittins ◽  
J. C. Rucklidge ◽  
C. K. Brooks
Keyword(s):  
Rare Earth ◽  
Electron Microprobe ◽  
Minor Element ◽  
Flood Basalt ◽  
Light Rare Earth ◽  
Additional Material ◽  
East Greenland ◽  
Eu Anomaly ◽  
Light Rare Earth Elements ◽  
Basaltic Lavas

AbstractWhole-rock, minor element, rare earth, and electron microprobe data are presented for basaltic lavas from the western Kangerdlugssuaq area of East Greenland. Samples were obtained from Professor W. A. Deer's 1936 collection at Triangular Nunataks and Gardiner Plateau, and additional material obtained by sampling moraines on the surface of Kangerdlugssuaq Glacier. Both undersaturated and tholeiitic lavas are present at the Triangular Nunatak locality but the glacier suite is dominantly tholeiitic. The tholeiitic suite is less evolved than tholeiites from the Scoresby Sund area. Undersaturated lavas show enrichment in light rare earth elements and tholeiitic lavas show fiat chondrite-normalized patterns. Tholeiites from the Gardiner Plateau show no Eu anomaly but others show a slight negative Eu anomaly. Chemical data and considerations of regional geology are consistent with Cox's (1980) model of flood basalt vulcanism.

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