羊拉地区的火山岩分为块状和层状两类，它们分别形成于早石炭世和晚石炭世；块状火山岩呈单一拉斑玄武岩组合，层状火山岩的岩石类型以拉斑玄武岩和角闪安山岩为主，形成玄武岩－安山岩岩石组合；块状火山岩具准洋脊型火山岩特征，层状火山岩与大陆裂谷型火山岩特征一致；火山岩形成的构造环境，是在扬子地块西缘基础上发展起来的裂谷洋盆，块状火山岩发育于裂谷洋盆中央（准洋脊），层状火山岩则发育于裂谷洋盆的陆缘斜坡（次大陆）。羊拉铜矿是与裂谷洋盆型火山岩有关的块状硫化物矿床 The volcanic rocks in the Yangla region are divided into two types: massive and stratiform, which are formed in the Early Carboniferous and the Late Carboniferous respectively. The massive volcanic rocks are single tholeiitic basalt assemblages. The stratiform volcanic rocks are characterized by tholeiite and horn flash Andesite dominated to form basalt-andesite rock assemblage; massive volcanic rock with quasi-ocean ridge volcanic features, layered volcanic rocks and continental rift-type volcanic rock characteristics; volcanic rock tectonic environment is based on the western edge of the Yangtze block development The rifted oceanic basins and massive volcanic rocks are developed in the center of rift ocean basins (quasi-oceanic ridges), while the lamellar volcanic rocks are developed on the continental slope (sub-continental) of rifted ocean basins. The Yangla copper deposit is a massive sulphide deposit associated with the Rift Ocean basin volcanic rocks