The main rock types of the NNS Formation are psedoleucite phonolite formed in the 1st subcycle of eruption and hauyne phonolite in the 2nd subcycle, as well as minor phonolitic ignimbrite, rhyakkumulate, and trachyte;2.
1、娘娘山组火山岩主要岩石类型为假白榴石响岩及蓝方石响岩,另有少量响岩质熔结凝灰岩、熔结角砾岩和粗面岩等;2、两亚旋回火山岩碱质含量变化趋势不同,假白榴石响岩更富钾,而蓝方石响岩更富钠。
本网站所收集内容来自网友分享仅供参考，实际请以各学校实际公布信息为主！内容侵权及错误投诉：1553292129@qq.com
CopyRight © 2020-2024 优校网[www.youxiaow.com]版权所有 All Rights Reserved. ICP备案号：浙ICP备2024058711号