Detection and visualization of micron-scale U-Ca phosphates as a key to redox and acid-base conditions in ores: sandstone-hosted uranium deposit
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F23%3A00574331" target="_blank" >RIV/61388955:_____/23:00574331 - isvavai.cz</a>
Alternative codes found
RIV/67985831:_____/23:00574331 RIV/68407700:21340/23:00372154 RIV/00216224:14310/23:00133522
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0009281923000570" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0009281923000570</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.chemer.2023.126006" target="_blank" >10.1016/j.chemer.2023.126006</a>
Alternative languages
Result language
angličtina
Original language name
Detection and visualization of micron-scale U-Ca phosphates as a key to redox and acid-base conditions in ores: sandstone-hosted uranium deposit
Original language description
The presence and nature of uranium minerals subject to high leachability is one of the most significant factors in the exploitation of low-grade ores. The detection of these minerals is a challenging task due to their small size and low abundance. This paper presents a novel method of data processing that allows distinguishing and visualization of micron-scale U minerals. For this purpose, core samples of U-bearing sandstones from the Břevniště deposit (Czech Republic) were used. After their study by inductively coupled plasma spectroscopy, optical and scanning electron microscopy (SEM-EDS) and X-ray diffraction analysis, the presence of authigenic grains of U minerals occurring in various associations and their chemical compositions were confirmed by an electron microprobe. However, the use of these conventional instruments for the analysis of heterogeneous ore material with valuable information hidden, showed the necessity for a special data treatment. Matrix transformation of raw SEM-EDS data allowed for even more accurate visualizations such as contour and point maps of elemental distribution. Then, mathematical and visual correlations of transformed data revealed relationships among some measured elements (Ca, P, U, Zr, Nb, Fe, S) and their spectral overlaps. Conditions of ore formation were predicted based on the visualizations, correlations and the paragenesis of ningyoite in uranium ore. Herein suggested approach can help to identify economically significant minerals in complex mineralizations worldwide and increase the mining potential of the deposits.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Chemie der Erde-Geochemistry
ISSN
0009-2819
e-ISSN
1611-5864
Volume of the periodical
83
Issue of the periodical within the volume
4
Country of publishing house
DE - GERMANY
Number of pages
17
Pages from-to
126006
UT code for WoS article
001146616800001
EID of the result in the Scopus database
2-s2.0-85166975096