Results of the study of anisotropy of elastic properties of rocks from the Luchlompolo fault zone (Pechenga region, Kola Peninsula)

Il’chenko, Vadim

doi:10.1134/s1069351309030057

Izv., Phys. Solid Earth

2009

DOI: 10.1134/s1069351309030057

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Results of the study of anisotropy of elastic properties of rocks from the Luchlompolo fault zone (Pechenga region, Kola Peninsula)

Vadim Il’chenko

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2022

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“…As shown by the earlier studies [20], the elastic anisotropy index A calculated from the propagation velocities of P-waves, is in direct correlation with elastic anisotropy index. This parameter is quite sufficient for a preliminary assessment of the tectonophysical setting.…”

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confidence: 67%

Litsa uranium ore occurrence (Arctic zone of the Fennoscandian Shield): new results of petrophysical and geochemical studies

Il’chenko

Afanasieva

Каулина

et al. 2022

PMI

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Mineralogical, petrophysical and geochemical studies have been carried out to determine the sequence and formation conditions of uranium mineralization within the Litsa ore occurrence (Kola Region). Mineralogical studies show the following formation sequence of ore minerals: uraninite – sulfides – uranophane, coffinite, pitchblende. Two stages of uranium mineralization are distinguished: Th-U (1.85-1.75 Ga) and U (400-300 Ma). The distribution of physical properties of rocks in the area is consistent with the presence of two temporal stages in the formation of mineralization with different distribution and form of uranium occurrence in rocks. The factors that reduce rock anisotropy are the processes of migmatization and hydrothermal ore mineralization, which heal pores and cracks. Fluid inclusions in quartz studied by microthermometry and Raman spectroscopy contain gas, gas-liquid and aqueous inclusions of different salinity (1.7-18.4 wt.% NaCl-eq.). According to homogenization temperatures of inclusions in liquid phase, the temperature of the Paleoproterozoic and Paleozoic stages of uranium mineralization at the Litsa ore occurrence is ~ 300 and 200 °С, respectively. Correlations of the spatial distribution of elastic anisotropy index with an elevated radioactive background allow using this petrophysical feature as one of the prognostic criteria for uranium and complex uranium mineralization when carrying out uranium predictive work.

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supporting

confidence: 67%

Litsa uranium ore occurrence (Arctic zone of the Fennoscandian Shield): new results of petrophysical and geochemical studies

Il’chenko

Afanasieva

Каулина

et al. 2022

PMI

View full text Add to dashboard Cite

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Results of the study of anisotropy of elastic properties of rocks from the Luchlompolo fault zone (Pechenga region, Kola Peninsula)

Cited by 1 publication

References 0 publications

Litsa uranium ore occurrence (Arctic zone of the Fennoscandian Shield): new results of petrophysical and geochemical studies

Litsa uranium ore occurrence (Arctic zone of the Fennoscandian Shield): new results of petrophysical and geochemical studies

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