准噶尔盆地东部克拉美丽山白碱沟石炭系火山岩露头研究

Study on the Carboniferous volcanic rocks outcrop in the Baijiangou of Kelameili mountain,Eastern of Junggar Basin

白碱沟位于准噶尔盆地东部的克拉美丽山露头区。其石炭系火山岩剖面发育玄武岩、玄武安山岩、安山岩、流纹岩、火山角砾岩等多种岩石类型。白碱沟西沟石炭系剖面代表了巴塔玛依内山组的下部岩性特征,白碱沟东沟石炭系剖面代表了巴塔玛依内山组的中、上部岩性特征。白碱沟剖面总体上自下而上呈玄武岩-安山岩-流纹岩组合,形成基性火山岩-中性火山岩-酸性火山岩序列。这一火山岩序列特征符合岩浆演化规律,与钻井资料相吻合。

Baijiangou is in the Kelameili mountain of eastern Junggar Basin.The Carboniferous volcanic rocks in the Baijiangou is various,such as basalt,andesibasalt,andesite,rhyolite and volcanic brecci.The Carboniferous volcanic rocks of west Baijiangou stand for the rock sequence of lower Bashan group（C2b）,while the the Carboniferous volcanic rocks of east Baijiangou stand for the rock sequence of upper Bashan group（C2b）.The whole sequence of Baijiangou outcroup includes basalt andesite rhyolite.This sequence of vocanic rocks is in accord with the magma evolution law and the well logging,and could be as a guide for the exploration of Carboniferous volcanic rocks.