Minerogenesis sequence and processes in weathering mantle of ultrabasitic rocks of the Serov–Mauk ophiolite belt (Northern Urals)

The geological structure and mineral composition in weathering mantle of ultrabasitic formations of the Serov–Mauk ophiolite belt are comprehensively studied. Considering complex geological history of the weathering mantle, the studies involved a wide range of precision research methods–optical microscopy, X-ray diffraction analysis, thermal tests, Xray microspectral analysis and Raman spectrography. As a result, the minerogenesis sequence was disclosed, and the modern genetic classification of minerals in ultrabasites and weathering mantle was developed. The classification distinguishes between hypogene and supergene minerals in weathering mantle of ultrabasitic rocks of the Serov–Mauk ophiolite belt. Hypogene minerals are divided into four groups—magmagene–relict, oceanic waste minerals, low-grade metamorphogenic–relict and hydrothermal relict minerals. Supergene minerals are grouped into residuum and rocks superimposed in infiltration. Residuum is divided into two groups of diffusion and infiltration minerals. The research findings revel the critical geological processes connected with evolution of ultrabasitic formations and weathering mantle of the Serov–Mauk ophiolite belt. The drawn conclusions prove hydrothermal processes and low-grade metamorphism in the history of rock mass and weathering mantle of the Serov–Mauk ophiolite belt, and can be used for the prognostics and prospecting of nickel ore bodies.

Keywords: weathering mantle, ultrabasite, Serov–Mauk ophiolite belt, Northern Urals, nickel.
For citation:

Ilalova R.K., Duryagina A.M., Ageev A.S. Minerogenesis sequence and processes in weathering mantle of ultrabasitic rocks of the Serov–Mauk ophiolite belt (Northern Urals). MIAB. Mining Inf. Anal. Bull. 2020;(7):13-26. [In Russ]. DOI: 10.25018/0236-1493-2020-7-013-26.

Acknowledgements:

The study was supported by the Ministry of Education and Science of the Russian Federation within the Federal Targeted Program on R&D in the Priority Areas of Science and Technology in Russia for 2014–2020, Project No. RFMEFI61620X0127.

Issue number: 7
Year: 2020
Page number: 13-26
ISBN: 0236-1493
UDK: 551.1/.4
DOI: 10.25018/0236-1493-2020-7-0-13-26
Article receipt date: 17.02.2020
Date of review receipt: 24.04.2020
Date of the editorial board′s decision on the article′s publishing: 20.06.2020
About authors:

R.K. Ilalova1, Cand. Sci. (Geol. Mineral.), Assistant of Chair, e-mail: Ilalova_RK@pers.spmi.ru,
A.M. Duryagina1, Cand. Sci. (Geol. Mineral.), Assistant Professor,
A.S. Ageev1, Cand. Sci. (Geol. Mineral.), Assistant of Chair,
1 Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.

 

For contacts:

R.K. Ilalova, e-mail: Ilalova_RK@pers.spmi.ru.

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