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  • 标题:Mechanism for three types of mafic dyke swarms
  • 本地全文:下载
  • 作者:Guiting Hou
  • 期刊名称:Geoscience Frontiers
  • 印刷版ISSN:1674-9871
  • 出版年度:2012
  • 卷号:3
  • 期号:2
  • 页码:217-223
  • DOI:10.1016/j.gsf.2011.10.003
  • 语种:English
  • 出版社:Elsevier
  • 摘要:AbstractThis 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.
  • 关键词:KeywordsenParallel dyke swarmRadiating dyke swarmHole modelPlug model
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