RARE-EARTH PYRIT CONCREES MINERALIZATION IN THE DEPOSITS OF TATARSTAN MIDDLEURISH AGE

In the Oxford-Kimmeridgian deposits stages of the territory of western Tatarstan, it was discovered a field of stratiform pyrite mineralization. In this field clays are enriched by pyrite nodules. X-ray fluorescent and electron microscopic analyzes during the study of pyrite nodules revealed an incr...

Full description

Saved in:
Bibliographic Details
Published inInternational Multidisciplinary Scientific GeoConference : SGEM Vol. 17; no. 1.1; pp. 659 - 664
Main Authors Korolev, E A, Bakhtin, A I, Eskin, A A, Morozov, V P, Barieva, E R
Format Conference Proceeding
LanguageEnglish
Published Sofia Surveying Geology & Mining Ecology Management (SGEM) 01.01.2017
Subjects
Aggregates
Clay
Crystals
Earth
Feldspars
Fluorescence
Grains
Lanthanide phosphates
Lanthanum
Mineralization
Minerals
Nodules
Phosphates
Pyrite
Quartz
Rare earth elements
Rare earth phosphates
Sediments
Stratigraphy
Sulfur
Territory
Trace elements
Russia
Online AccessGet full text

Cover

More Information
Summary:In the Oxford-Kimmeridgian deposits stages of the territory of western Tatarstan, it was discovered a field of stratiform pyrite mineralization. In this field clays are enriched by pyrite nodules. X-ray fluorescent and electron microscopic analyzes during the study of pyrite nodules revealed an increased content of rare-earth phosphates elements (monazites) in them. Monazites are mainly represented by LaPO4, CePO4, (La,Ce)PO4, (Nd,La)PO4 and SmPO4. They form single xenomorphic grains and short-prism crystals. Three generations of monazites are distinguished: the first are developed along the surface of inclusions of quartz and feldspars grains, the second replace the pyrite grains, the third are developed in the pores between the pyrites grains. We propose mechanisms of the monazites stages formation based on the geochemical phosphates properties of rare earth elements.
ISSN:1314-2704
DOI:10.5593/sgem2017/11