MANTLE-CRUST INTERACTION AT THE LATE STAGE OF EVOLUTION OF HERCYNIAN ALTAI COLLISION SYSTEM, WESTERN PART OF CAOB

S V Khromykh,E N Sokolova,P D Kotler

doi:10.5800/gt-2017-8-3-0270

Abstract

Altai collision system of Hercynides was formed in Late Paleozoic as a result of oblique collision of Siberian continent and Kazakhstan composed terrane [Vladimirov et al., 2003; 2008; Xiao et al., 2010]. At the late stages of its evolution (time interval from 310–300 to 280–270 Ma) the huge different mafic and felsic magmatism occurred at the territory (Fig. 1) [Vladimirov et al., 2008; Khromykh et al., 2011, 2013, 2014, 2016; Kotler et al., 2015; Sokolova et al., 2016]. It is evident about increased thermal gradient in lithosphere and about significant role of mantle and active manifestation of mantle-crust interactions. Some magmatic complexes may be considered as indicators of mantle-crust interaction processes.

Highlights

Altai collision system of Hercynides was formed in Late Paleozoic as a result of oblique collision of Siberian continent and Kazakhstan composed terrane [Vladimirov et al, 2003; 2008; Xiao et al, 2010]
At the late stages of its evolution the huge different mafic and felsic magmatism occurred at the territory (Fig. 1) [Vladimirov et al, 2008; Khromykh et al, 2011, 2013, 2014, 2016; Kotler et al, 2015; Sokolova et al, 2016]
Executed detail petrologic studies of rocks of Preobrazhenka intrusion [Khromykh et al, 2017] show that all different rocks of the massif may be divided into two groups: mafic and felsic

Summary

Introduction

Altai collision system of Hercynides was formed in Late Paleozoic as a result of oblique collision of Siberian continent and Kazakhstan composed terrane [Vladimirov et al, 2003; 2008; Xiao et al, 2010]. At the late stages of its evolution (time interval from 310–300 to 280–270 Ma) the huge different mafic and felsic magmatism occurred at the territory (Fig. 1) [Vladimirov et al, 2008; Khromykh et al, 2011, 2013, 2014, 2016; Kotler et al, 2015; Sokolova et al, 2016]. Executed detail petrologic studies of rocks of Preobrazhenka intrusion [Khromykh et al, 2017] show that all different rocks of the massif may be divided into two groups: mafic (from olivine gabbro to monzodiorites) and felsic (from Qtz monzonites to leucogranites).

Results

Conclusion