• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen >The Sierra de Velasco (northwestern Argentina) - an example for polyphase magmatism at the margin of Gondwana
【24h】

The Sierra de Velasco (northwestern Argentina) - an example for polyphase magmatism at the margin of Gondwana

机译：Sierra de Velasco（阿根廷西北部）-冈瓦纳边缘多相岩浆作用的例子

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Sierra de Velasco is formed of large plutons that are related to each other by intrusive contacts and separated by generally aligned deformation zones. The plutons are composed of calc-alkaline, syn-, late- and post-kinematic granitoids of different ages and intrusion levels. They are grouped in three large batholiths: Aimogasta, Bazan and Patquia. On the northeastern flank, the metamorphic country rock is represented by micaschists, phyllites and quartzites with hornfels (La Cebila Formation), to the north by tonalitic porphyries that in all cases demonstrate a shallow level of the granitoid intrusions. Shape of the plutons, as well as structural characters and grade of deformation indicate that the intrusive sequences began in Ordovician times and culminated in the Carboniferous, with deformation periods during Silurian and Devonian times.
机译：韦拉斯科山脉（Sierra de Velasco）由大型岩体组成，这些岩体通过侵入性接触相互联系，并由大致对齐的变形区隔开。这些小体由不同年龄和侵入水平的钙碱性，同卵型，晚期和后期运动型花岗岩组成。它们分为三个大的基岩：Aimogasta，Bazan和Patquia。在东北侧，变质的乡村岩石以云母，千枚岩和带角铁的石英岩（La Cebila地层）为代表，向北的呈色调斑状斑岩代表，在所有情况下均显示出较浅的花岗岩侵入体。 lut的形状，结构特征和变形等级表明，侵入序列始于奥陶纪，到石炭纪达到顶峰，志留纪和泥盆纪时期为变形期。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号