The first geological map of intrusive rocks in Dabie orogenic belt and its adjacent areas and its explanatory notes

The exposed intrusive rocks of different ages in the Dabie orogenic belt which possess about 50% of the total surface area of that belt have great significance for understanding the evolution of the Dabie orogenic belt. In order to exchange the basic information obtained from the authors recent researches funded by the National Natural Science Foundation of China with other researchers, this paper presents the first geological map of intrusive rocks in Dabie orogenic belt and its adjacent areas (1:500000). This map is based on previous relevant maps and incorporates the latest data(including geochemical data and geochronological data) in the past two decades and the unpublished data obtained by the authors research group. It displays the spatial distribution, intrusive ages, petrologic features and geochemical features. Also, in order to improve the readability of the map, the authors give serial number to the intrusive bodies. The research shows that the Early Cretaceous intrusive bodies possess the majority of all the intrusive rocks, while Neoproterozioc and Early Paleozoic bodies are much less. Most of the Neoproterozioc intrusive bodies occur as stocks in southern Dabie, Hong'an area in western Dabie and northern Huaiyang area. The Early Paleozoic intrusive bodies are much smaller, constituting paired magmatic belts in south and north parts of Dabie orogenic belt. The Late Jurrassic intrusive bodies are mainly distributed in the lower and middle reaches of the Yangtze River. The Early Cretaceous intrusive bodies are widely spread, covering 47% of the total area of the orogenic belt. The Late Mesozoic magma is probably associated with the northwestward subduction of Paleo-Pacific plate underneath the South China block and subsequent extensional events.