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太行山太古宙湾子变质层状岩系主要由富铝片麻岩、各类大理岩、变粒岩等组成。富铝片麻岩和大理岩类岩石中平衡流体成分相差甚大：与透辉大理岩和橄榄大理岩平衡的变质流体成分ｘ（Ｈ２Ｏ）＝０．０２～０．０７，近于纯二氧化碳；与富铝片麻岩平衡的流体成分则含有相对较高的水，ｘ（Ｈ２Ｏ）＝０．２７～０．７４７。不同成分的岩石在很小区域内变质流体成分存在较大差别，它们主要受岩性控制。富铝片麻岩水的摩尔分数较高，大理岩水摩尔分数极低，反映了它们的流体岩石平衡体系以内部缓冲作用为主。这与阜平片麻杂岩的以渗透作用为主的流体岩石平衡体系形成了鲜明的对比，反映了湾子变质层状岩系与阜平片麻杂岩形成于不同的构造层次。
The Taihangshan Archean Bay metamorphic stratigraphic rocks are mainly composed of aluminum-rich gneiss, various types of marble and granulite. The composition of the balance fluids in the gneisses of the Al-rich gneiss and marble is very different: the component of the metamorphic fluid that equilibrates with the diatomite and the olivine becomes x (H2O) = 0.02-0.07, which is almost pure carbon dioxide; and The equilibrium fluid composition of the gneiss gneiss contains relatively high water, x (H2O) = 0.27 ~ 0.747. Rocks with different compositions have quite different metamorphic fluid compositions in a very small area, and they are mainly controlled by lithology. The high molar fraction of water in the gneiss and the extremely low molar fraction of marble indicate that the fluid-rock equilibrium system of them is dominated by internal cushioning. This is in stark contrast to the infiltrative fluid rock balance system in the Foping gneiss, which reflects that the Wanzi metamorphic strata and the Fuping gneiss are formed at different tectonic levels.