- 责任者：Sun Bei (Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China) ; Shan Yehua
- 刊名：Chinese Journal of Geology
- 出版年：2010
- 卷期：45(1)
- 关键词：岩墙群 ; dyke swarms ; 甘肃 ; Gansu Province
- 页码：p.80-91
- 图表：5 illus., 26 refs.
- 分类号：0801
- issnNo：ISSN0563-5020
- isbnNo：CN11-1937/P
face="Times New Roman">Within an elliptical，face="Times New Roman">W-face="Times New Roman">E trending Hercynian granitoid in the Northern Mountain，face="Times New Roman">northwestern Gansu Province three main sets of dike swarms were recognized. The second set has a majority of dikes throughout the granitoid. It is mafic in composition，face="Times New Roman">and distributed in a curved pattern. The dike swarm in the set changes the strike gradually from the north-face="Times New Roman">northeast in the north to the north-face="Times New Roman">northwest in the south. This curved pattern may be ascribed to two possible mechanisms，face="Times New Roman">multi-face="Times New Roman">layer buckling and local stress-face="Times New Roman">field perturbation. It suggests the incomplete welding of the sides of the fault by the granitic intrusion along it，face="Times New Roman">which afterwards permitted the reactivation of the fault，face="Times New Roman">probably due to the relatively independent movement of the faulted blocks，face="Times New Roman">as a dextral transcurrent fault.