最近,南京大学地质系区测队,在湖南资兴七宝山,发现中泥盆统下部跳马涧底砾岩不整合于粗粒及中粒斑状黑云母花岗岩之上,关系极为清楚;砾岩中有很多石英和长石碎块(目前尚未发现花岗岩的砾石);底砾岩未受任何蚀变影响,而龙山系轻变质岩系,则有明显的热变质现象,故将该花岗岩初步定为加里东期。 Recently, the team from the Geological Department of Nanjing University found in Qibao Mountain, Zixing County, Hunan Province that the lower part of the Middle Devonian conglomerate in the Lower Majian Basin is not integrated with the coarse-grained and medium-sized biotite-type granodiorites, and the relationship is clear. In the conglomerate There are a lot of quartz and feldspar fragments (no granite gravel has been found yet); the base conglomerate is not affected by any alteration, whereas the Longshan system metamorphism has obvious thermal metamorphism, so the granite was initially identified as Gary East.