An analysis of the gravity and magnetic data shows that the boundary between the Yangtze platform and the Songpan-Ganzi orogenic belt should be the Songpan-Wenxian fault rather than the Longmenshan fault. This means that the whole Longmenshan area should belong to the Yangtze platform. Meanwhile, it is thought that the basement rock characteristics of the Songpan-Ganzi orogenic belt are different from those of the Yangtze platform.
丁燕云, 李占奎. 扬子地台西北界线之我见[J]. 物探与化探, 2007, 31(6): 510-513.
DING Yan-yun, LI Zhan-kui. ON THE NORTHWEST BOUNDARY OF THE YANGTZE PLATFORM. Geophysical and Geochemical Exploration, 2007, 31(6): 510-513.