The main orebody of Huashupo Copper Deposit in Tongling occurs in silica horizon of Qixia Group of Lower Permian System, while minor ores controlled by strata occur in Gufeng Group.
铜陵花树坡铜矿床主矿体赋存于二叠系下统栖霞组硅质层内，次要矿体赋存于孤峰组内，受层位控制。
The tubular cave system resulted from erosion in Dongwu stage are the main reservoir space of Lower Permian limestone reservoirs in Sichuan Basin.
四川盆地下二叠统灰岩储层中，较大储量缝洞系统以东吴期暴露溶蚀形成的管道状溶洞系统为主要储集空间。
Permian system in Tazhong area may be divided into three lithology groups: lower clastic group, volcanics group and upper clastic group based on the data of core, drilling, logging and so on.
前言： 依据岩心、钻井、测井等资料，将塔中地区二叠系分为三个岩性组：下碎屑岩组、火山岩组、上碎屑岩组。
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