Results 21 to 30 of about 23,819 (265)
Atom Indonesia, 2022 Thorium (Th) anomaly was found in Adang Volcanic Complexes, Mamuju Area, West Sulawesi. This element is associated with high-value elements, the rare earth elements (REE). The minerals containing Th and REE were found in veins mineralization with various
I. G. Sukadana +5 more
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Geochemical characteristics and mining prospects of REE in Lugou coal mine of Xinmi coalfield
矿业科学学报, 2020 The content of rare earth elements and their occurrence characteristics under low temperature ashing conditions in Lugou coal mine of Xinmi coalfield were studied by XRD, XRF and ICP-MS analysis techniques.The results show that the total content of rare ...
Luo Zhonggeng +3 more
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GEOCHEMICAL HETEROGENEITY OF ESTONIAN GRAPTOLITE ARGILLITE; pp. 377–401 [PDF]
Oil Shale, 2013 This paper describes vertical fine-scale geochemical heterogeneity of Estonian graptolite argillite (GA). GA samples from Pakri and Saka outÂcrop sections were collected at 20 cm intervals for chemical analysis of major and trace elements, including ...
MARGUS VOOLMA +4 more
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, 2021 We survey old and new approaches to the study of symbolic powers of ideals. Our focus is on the symbolic Rees algebra of an ideal, viewed both as a tool to investigate its symbolic powers and as a source of challenging problems in its own right. We provide an invitation to this area of investigation by stating several open questions.
Grifo, Eloísa, Seceleanu, Alexandra
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A Special Rare-earth Mineral —Eudialyte
Kuangchan zonghe liyong, 2023 This is an essay in the field of earth science, which mainly reviews the basic characteristics of eudialyte, a rare earth-containing mineral in alkaline rocks.
Wei Chen, Jiayun Zhou
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Rocky Mountain Journal of Mathematics, 1994 This paper deals with the question when the Rees ring associated with a filtration of ideals is invariant under a given derivation. Necessary and sufficient conditions are presented in the general case. The above question is also considered for several specific filtrations.
TAMONE, GRAZIA, MOLINELLI SILVIA
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Occurrence of rare earth element and yttrium (REY) in Tanjung formation coking coal from Sekako area, Central Kalimantan [PDF]
E3S Web of Conferences, 2020 Inorganic geochemistry of coal become a point of interest on coal study, especially relating with the occurrence of rare earth element. Tanjung Formation is one of coking coal bearing deposits in Barito Basin, Central Kalimantan.
Amijaya Hendra +2 more
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Записки Горного института, 2022 Data on the content and distribution of trace and rare-earth elements (SIMS method) in sectors and growth zones of a large zircon crystal from miaskite pegmatites of the Vishnegogorsky massif are presented.
Ekaterina V. Levashova +3 more
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Литосфера, 2018 Object. The article describes a new geological and geochemical data for Permian host rocks and copper sandstones (CS) in Orenburg’s Pre-Urals. Methods .
Alexander V. Volkov +4 more
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