长江中下游三叠纪石膏蕴藏量极其丰富,分布十分广泛。自西向东包括川东(万县以东)、鄂、湘西北、皖南和苏南,其分布范围南北各以古江南岛状隆起和秦岭为界。本区石膏矿主要赋存于中、下三叠统,主要成膏期有七个(图1)。 Triassic gypsum reserves in the middle and lower reaches of the Yangtze River are extremely rich and distributed widely. From west to east, including eastern Sichuan (east of Wanxian), Hubei, northwestern Hunan, southern Anhui and southern Jiangsu, its distribution ranges from south to north of the ancient Jiangnan uplift and the Qinling Mountains. Gypsum mine in this area mainly occurs in the Middle and Lower Triassic, mainly into a cream period of seven (Figure 1).