Petrogenetic characteristics of mafic-ultramafic massifs in Nizhne-Derbinsk complex (East Sayan Mountains)

19th International Scientific Symposium in honor of Academician M.A. Usov "Problems of Geology and Subsurface Development"

Cherkasova, T.^1 ; Chernishov, A.^1 ; Goltsova, Yu.^1 ; Timkin, T.^1 ; Abramova, R.^2

Department of Mineral Exploration, Institute of Natural Resources, National Research Tomsk Polytechnic University, 30 Lenin Ave., Tomsk

634050, Russia^1

Department of Foreign Language, Institute of Natural Resources, National Research Tomsk Polytechnic University, 30 Lenin Ave., Tomsk

634050, Russia^2

关键词: Data interpretation;    Development stages;    Folding belts;    Formation stage;    Gabbronorites;    Petrofabrics;    Rock-forming minerals;    Ultramafic massifs;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/27/1/012002/pdf
DOI  :  10.1088/1755-1315/27/1/012002

来源: IOP

【 摘 要 】

The article describes the results of petrographic, petrochemical, petrofabric, mineralogical and geochemical studies of the major rock groups potentially Cu, Ni, Pt ore- bearing mafic-ultramafic massifs in the Nizhne- Derbinsk complex (Eastern Sayan Mountains). Based on the data interpretation the investigated massifs can be classified as peridotite- pyroxenite-gabbronorite formation of geosynclinal regime in Altai-Sayan folding area. Significant massif deformation occurred during the final post-consolidation formation stage. The petrographic features of gabbro and petrofabric patterns of the rock-forming minerals in the Burlakski and Nizhne-Derbinsk massifs indicated the fact that massifs were involved in the accretion-collisional development stage of the Central Asian folding belt during the final formation stages the Nizhne-Derbinsk complex.