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Jurassic volcanic

Jurassic volcanic

Jurassic volcanic

Jurassic volcanic

1

Springs from the Jurassic volcanic quarter of the northeast and northwest parts of the fault for high-quality spa .

泉水出自侏罗季火山岩的西北与东北向断裂复合部位，为优质矿泉。

2

Jurassic volcanic rocks in Yingshan fault depression are mainly andesite, basalt, dacite , volcanic breccia and tuff .

莺山断陷侏罗系火山岩主要为安山岩、玄武岩、英安岩、火山角砾岩及凝灰岩。

3

The Jurassic volcanic rocks are belong to K alkaline and came from shallow crust with weak repartition of magma .

侏罗纪为钾质碱性系列，古近纪为钙碱性系列，而且前者岩浆源较浅，岩浆分异作用差。

4

Regional geological survey at the scale of 1: 250000 has mapped the late Cretaceous and middle-late Jurassic volcanic rocks in Nagqu area.

25万区域地质调查在那曲地区圈定出晚白垩世、中 -晚侏罗世火山岩。

6

Characteristics of Early Jurassic Volcanic Rocks and Their Tectonic Significance in Haidewula, East Kunlun Orogenic Belt, Qinghai Province

东昆仑造山带海德乌拉一带早侏罗世火山岩特征及其构造意义

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