The differentiation process of ultrapotassic magmas is enigmatic and poorly understood. The Yaojiazhuang ultrapotassic complex is concentrically zoned by late-intruded syenite in the core and early emplaced clinopyroxenite in the periphery, combining a “bi-modal” lithology. Spatially, apatite and iron oxide-apatite (IOA) ores, glimmerite and pseudoleucite occur in the upper part of clinopyroxenite. The syenite and clinopyroxenite are composed of variable amounts of clinopyroxenite, biotite, K-feldspar, magnetite, apatite with minor analcite, titanite, and primary calcite. The pseudoleucite clinopyroxenite contains mainly clinopyroxene, biotite and garnet in the matrix, and nepheline–K-feldspar intergrowth with muscovite and minor celestine in the leucite pseudomorph. Geochemically, rocks of the Yaojiazhuang complex are significantly enriched in potassium (K), light rare earth elements (LREE), and large ion lithophile elements (LILE). Crustal contamination by Archean tonalite–trondhjemite–granodiorite (TTG) gneisses basement may play an important role to convert the syenitic melts from silica-undersaturation to saturation. Fractionation crystallization is supported by the mineral crystallization sequence to explain the bimodal lithologies instead of silicate liquid immiscibility. During the magmatic evolution, decompression, fractionation of volatile-poor clinopyroxene and the enhancement by CO₂ may result in the exsolution of an aqueous fluid. The late-stage interactions between existing minerals and magmatic fluids in the crystal mush could be a key process in the generation of both leucite pseudomorphs and apatite/IOA ores.

超钾盐岩浆的分化过程是神秘的，人们对此知之甚少。姚家庄超钾质岩心同心地带，其核心为晚注入的堇青石，外围为早沉积的斜辉石，并结合了“双峰”岩性。在空间上，磷灰石和辉石的上部分布着磷灰石和氧化铁-磷灰石（IOA）矿石，闪锌矿和假白榴石。堇青石和斜长石由可变数量的斜长石，黑云母，钾长石，磁铁矿，磷灰石和少量方铁，钛矿和主要方解石组成。假白云母的斜辉石在基质中主要含有斜辉石，黑云母和石榴石，在白云石的假晶形中，霞石-钾长石与白云母和次要的Celtine共生。地球化学 姚家庄复合体的岩石中富含钾（K），轻稀土元素（LREE）和大离子亲石元素（LILE）。太古代斜纹岩-长白云母-格拉诺闪石（TTG）片麻岩基底对地壳的污染可能起着重要的作用，将正胶状熔体从二氧化硅欠饱和转变为饱和。矿物结晶顺序支持分级结晶，以解释双峰岩性而不是硅酸盐液体的不溶混性。在岩浆演化过程中，挥发性较弱的斜辉石的减压，分馏和CO的增强作用 太古代斜纹岩-长白云母-格拉诺闪石（TTG）片麻岩基底对地壳的污染可能起着重要的作用，将正胶状熔体从二氧化硅欠饱和转变为饱和。矿物结晶顺序支持分级结晶，以解释双峰岩性而不是硅酸盐液体的不溶混性。在岩浆演化过程中，挥发性较弱的斜辉石的减压，分馏和CO的增强作用 太古代斜纹岩-长白云母-格拉诺闪闪岩（TTG）片麻岩基底对地壳的污染可能起着重要的作用，将正胶状熔体从二氧化硅欠饱和转变为饱和。矿物结晶顺序支持分级结晶，以解释双峰岩性而不是硅酸盐液体的不溶混性。在岩浆演化过程中，挥发性较弱的斜辉石的减压，分馏和CO的增强作用_图2可能导致水性流体的析出。结晶糊状物中现有矿物与岩浆流体之间的后期相互作用可能是白云岩假晶型和磷灰石/ IOA矿石生成的关键过程。