BAUXITES OF THE TATAR DEPOSIT (YENISEI RIDGE, RUSSIA): THE FIRST EVIDENCE OF CONTACT-KARST GENESIS

• DOI: 10.31857/s2686739723601825
• Publication Date: 2024-04-15T06:55:23Z
• Authors: N. M. Boeva; A. D. Slukin; M. A. Makarova; E. S. Shipilova; Ph. P. Melnikov; D. A. Vnuchkov; E. A. Zhegallo; L. V. Zaitseva; N. S. Bortnikov
• Keywords: Denudation; Tatar

The Tatar bauxite deposit on the territory of Russian Federation was formed as a result sedimentation in contact-karst depressions products denudation lateritic weathering crusts amphibolites. Detailed mineralogical studies bauxites made it possible to reliably reconstruct conditions for their formation. As turned out parent rocks and weathered before occurred due close location areas nutrition accumulation denudation. At same time, chemical processes continuing karst depressions. For first presence nanoparticles amorphous aluminum oxide revealed into bauxites. This characteristic feature form alumina precipitation is associated with subsequent cessation lateritization attenuation depth. monohydrate must be taken account when choosing scheme enrichment.