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. 2024 Nov 28;9(49):48681–48696. doi: 10.1021/acsomega.4c07825

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© 2024 The Authors. Published by American Chemical Society

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Back scattering image of uranium minerals in Shawan Formation. (a) Short columnar pitchblende. (b) Pitchblende in apatite pits. (c) Pitchblende in contact with zircon, distributed in quartz fractures. (d) Collophane coffinite encapsulating framboidal pyrite. (e) Coffinite aggregates distributed along the edges of framboidal pyrite. (f) Banded coffinite in calcite fractures. (g) Coffinite aggregates corroding albite. (h) Massive coffinite in calcite dissolution cavities. (i) Coffinite corroding albite. (j) Titanium–uranium oxides in calcite dissolution cavities. (k) Disseminated titanium–uranium oxides in calcite microfractures. (l) Massive titanium–uranium oxides corroding quartz. Pit: Pitchblende; Cof: Coffinite; Ti–U oxide: Titanium–uranium oxide; Py: Pyrite; Cal: Calcite; Q: Quartz; Zr: Zircon; Rt: Rutile; Ap. Apatite; Ab: Albite; Kfs: K-feldspar.