阿尔泰诺尔特地区火山岩岩石地球化学特征及构造背景

诺尔特地区火山岩赋存于上泥盆统忙代恰组及下石炭统红山嘴组中 ,火山岩属钙碱性系列 ,主要是酸性陆相火山岩 ,是诺尔特地区中地壳物质经部分熔融作用形成的。构造背景的研究表明 ,火山岩形成于新陆壳演化阶段 ,泥盆纪火山岩是固结期的产物 ,石炭纪火山岩是固结期→弛张期→活化期演化过程中的产物。

GEOCHEMICAL CHARACTERISTICS AND TECTONIC SETTING OF THE VOLCANIC ROCKS IN THE NURT AREA OF ALTAY

Volcanic rocks occurring in the Lower Carboniferous Hongshanzui Formation and Upper Devonian Mangdaiqia Formation, belonging to the acid and calc-alkaline series and the eruptive environment was a continental environment. The volcanic rocks originated from partial melting of the middle crust.The Upper Devonian volcanic rocks were formed at the consolidation stage of new continental crust phase. The Lower Carboniferous volcanic rocks were formed at the consolidation, relaxation and mobilization stages.;