Magnetic Fabric Evidence for the Emplacement of Karamay NWW Dyke Swarm, Xinjiang
详细信息
- 责任者：Li Le (The Key Laboratory of Orogenic Belts and Crustal Evolution ; MOE ; School of Earth and Space Sciences ; Peking University ; Beijing 100871 ; China) ; Hou Guiting
- 刊名：Acta Geologica Sinica
- 出版年：2013
- 卷期：87(6)
- 关键词：岩墙群 ; dyke swarms ; 磁性组构 ; magnetic fabric ; 新疆 ; Xinjiang
- 页码：p.814-822
- 图表：illus., 43 refs.
- 分类号：0801
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
The mafic-intermediate Permian dykes widely spread in parallel around the Karamay region , northwestern Junggar , are considered as a typical product of late-collision tension.Based on outcrop features and microscope observation , including the dyke branches , oriental xenolith , mineral lineation and oriental porphyrotope , this study concludes that NWW-SEE dykes emplaced from west to east.The measurement of the anisotropy of magnetic susceptibility ( AMS ), the dominant orientations of the maximum magnetic susceptibility and analysis of susceptibility characteristics also indicate that the mafic dyke swarm emplaced from NWW to SEE.Combined with the space-time distribution characteristics of Dalabute fault , the results shows that the magma transported through the deep fault system of Dalabute to the subsurface and emplaced into the pre-exist fractures system to form dyke swarms.
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