No.14

The composite pluton is exposed on a near north-south oriented rock base, intruding into metamorphic sandstone, shale, carbonate rocks, volcanic rocks, and Triassic metamorphic sandstone and shale. It mainly consists of multiple intrusions, including Siguniangshan and Niuxingou pluton, macroscopically forming a dome-like intrusion. The pluton can be divided into synorogenic and postorogenic granites, with pulsating contact relationships between the intrusions.