首页 | 本学科首页   官方微博 | 高级检索  
     检索      


http://www.sciencedirect.com/science/article/pii/S1674987111001022
Authors:Guiting Hou
Institution:The Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, China
Abstract:This study proposes three models to explain the mechanism of the three major types of mafic dyke swarms. Parallel dyke swarms form in response to a regional stress field, e.g. the mafic dyke swarms in the North China Craton, whereas small radiating dyke swarm forms due to stress constructions around a plutonic or volcanic edifice, such as the dyke swarm at Spanish Peak, USA. The third type of radiating dyke swarm is giant fan-shaped dyke swarm such as the Mackenzie dyke swarm. Fractures that formed prior to magmatism may play a vital role in dictating the dyke swarm geometry. In most of the cases, the pre-existing fractures are induced by tectonic stresses and not by magma injection though magma injection can increase the fracture size by propagation at the dyke tip.
Keywords:Parallel dyke swarm  Radiating dyke swarm  Hole model  Plug model
本文献已被 CNKI 维普 万方数据 ScienceDirect 等数据库收录!
点击此处可从《地学前缘(英文版)》浏览原始摘要信息
点击此处可从《地学前缘(英文版)》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号