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羊拉铜矿化集中区共有４个夕卡岩体，按成因分为喷流－沉积和接触交代夕卡岩两大类，前者呈层状，是铜的主要赋矿围岩。层状夕卡岩中包裹体以类型多、组分复杂、均一温度（１００～６２０℃，一般大于３００℃）和盐度（８．３％～５５．０％ＮａＣｌ，一般≥２０％ＮａＣｌ）高且变化范围大、密度高（一般大于１．００ｇ／ｃｍ３）、捕获压力低（１０～２５ＭＰａ）为特征；交代夕卡岩则以包裹体类型简单、组分单一、均一温度（一般小于２５０℃）和盐度中—低（９．０％～２０．０％ＮａＣｌ）、密度低（一般小于１．００ｇ／ｃｍ３）且变化范围大、捕获压力高（１５０ＭＰａ）为特征。这些包裹体特征反映了两类夕卡岩的流体来源和演化机制是不同的，其中层状夕卡岩之流体为深部源与海水源的二元混合特征；交代夕卡岩为岩浆（体）源等组分自然冷却演化趋势。
There are altogether 4 skarn bodies in Yangla copper mineralization concentration area. According to their origin, they are divided into two major categories: jet flow-sedimentation and contact skarn deposition. The former is stratified and is the main ore-bearing wallstone of copper. The layered skarns contain many types of inclusions, complex components, uniform temperature (100 ~ 620 ℃, generally greater than 300 ℃) and salinity (8.3% ~ 55.0% NaCl, generally ≥ 20% NaCl) High and wide range of variation, high density (generally greater than 1.00g / cm3), low capture pressure (10 ~ 25MPa); account for the simple type of inclusions, composition of a single, uniform temperature (generally less than 250 ℃) and salinity - low (9.0% ~ 20.0% NaCl), low density (generally less than 1.00g / cm3) and a wide range of changes, high capture pressure (150MPa) is characterized. The characteristics of these inclusions reflect that the fluid sources and evolution mechanisms of two types of skarn are different, in which the fluid of layered skarn is a binary mixture of deep source and seawater; Source and other components of the natural cooling evolution trend.