Uranous Mineralogy of Hypergene Reduction Region: Using Electron Microscopy Data

ISBN-13: 9783030671853 / Angielski / Miękka / 2022

Olga Alexandrovna Doynikova

Opis

This book offers a comprehensive view of the valuable uranium ores and analytical electron microscopy methods, including electron microdiffraction principles, an essential technique for studying uranous minerals.This book also explains the laws governing the formation of uranium mineral accumulations, based on concepts published by the renowned Russian mineralogist L.N. Belova. It addresses all types of ore uranium concentrations in the hypergene region and schematizes all uranium mineral formation processes. Readers will also find selected examples of different genetic types of uranium deposits of black sooty ores; the data gathered from all findings on ningyoite worldwide, and new crystal chemistry data on tetravalent uranium phosphates. 

Spis treści

Introduction

I. Practice of studying of dispersal uranium minerals by ATEM methods

 1) Possibilities of TEM when studying dispersible minerals

 2) Microdiffraction SAED method

     Methods of interpretation of electron diffraction SAED-patterns

      Methodical ways of interpretation

3) Contribution of EM to uranium mineralogy

II. Minerals of tetravalent uranium U4+ of hypergenesis zone

 1. Ore mineralization of the reduction zone of hypergenesis – uranium blacks

 1) Regularities of manifestation of the uranium blacks mineralization in a hypergenesis zone

  2) Examples of deposites with the industrial blacks mineralization

  3) The mineral composition of uranium blacks (Uraninite. Coffinite. Ningyoite.)

  4) Genetic crystalchemistry of mineral components of uranium black/sooty

2. New minerals family – U4+ phosphates

  1) Ningyoite – mineral of Rhabdophane group

  2) Lermontovite mineral group (Lermontovite. Vyacheslavite. Urphoite.)

3. The crystal-chemistry data ATEM for questions of uranium mineralogy

1) Questions of isomorphism and systematics of phosphates of the rhabdophane group

 2) About the position of calcium in minerals of tetravalent uranium

 3) About phosphosilicates of tetravalent uranium

Conclusion

O autorze

Olga А. Doynikova, after graduating from Moscow State University, has been researching highly dispersed uranous mineralization using ATEM methods in the geology institute IGEM RAS – the leader of Russian science in the field of radiogeology and radiogeoecology. The author obtained the habilitation in Geology and still represents the national school of mineralogy and crystal chemistry.