The syenitic intrusion of the Floresta Azul Alkaline Complex is characterized by the presence of intense fluid activity in late stages of crystallization, leading to the formation of sodalitites and to the genesis of REE-rich accessory minerals. Calcite is a common mineral in the nepheline syenite of the complex, its formation being derived from CO₃ enrichment during fractional crystallization of phonolitic magma. Calcite may be found as white, pink to brown anhedral crystals which occur in the interstices of essential mineralogy and are commonly associated with cancrinite and siderophyllite. Calcite shows high contents of the rhodochrosite, siderite and strontionite molecules and the REE are present in its structure. From scanning electronic microscopy studies, with backscattered electron detector and a dispersive energy spectrometer, it has been possible to identify and characterize a number of textures and minerals related to calcite. The cooling of calcite promotes the formation of a rare REE-carbonate, the carbocernaite. This mineral occurs as exolutions, being distributed disseminated in calcite with irregular crystals and with acicular and oriented crystals. The interaction with hydrothermal fluids resulted in the another unusual REE-carbonate, the ancylite. That results from the recrystallization of calcite, mainly at its borders. A leaching process also occurred at the hydrothermal stage, leading to remobilization of Fe-Mn-Sr which precipitation as siderite, ankerite and strontianite. Therefore, calcite is an extremely important mineral in the syenitic intrusion of the Floresta Azul Complex, being possible to describe the autometasomatic and hydrothermal stages with their genesis, compositional variation, present textures and mineralogical associations.

Floresta Azul 碱性杂岩体的正长岩侵入体的特征是在结晶后期存在强烈的流体活动，导致方钠石的形成和富含 REE 的副矿物的成因。方解石是复合体霞石正长岩中的常见矿物，其形成来源于 CO ₃音质岩浆分馏过程中的富集。方解石可能以白色、粉红色至棕色的自面体晶体的形式出现，存在于基本矿物学的间隙中，通常与钙锌矿和铁蜡石有关。方解石显示出高含量的菱锰矿、菱镁矿和菱锰矿分子，并且在其结构中存在稀土元素。通过使用背散射电子探测器和色散能谱仪的扫描电子显微镜研究，可以识别和表征与方解石相关的许多纹理和矿物。方解石的冷却促进了稀有的稀土碳酸盐碳碳铈矿的形成。这种矿物以流出物的形式出现，分布在方解石中，具有不规则晶体以及针状和定向晶体。与热液流体的相互作用导致了另一种不寻常的 REE 碳酸盐，即 ancylite。这是方解石重结晶的结果，主要是在其边界处。水热阶段也发生浸出过程，导致 Fe-Mn-Sr 再活化，沉淀为菱铁矿、铁橄榄石和菱锰矿。因此，方解石是 Floresta Azul 杂岩体正长岩侵入体中极其重要的矿物，可以描述自交代和热液阶段的成因、成分变化、现有结构和矿物学关联。导致 Fe-Mn-Sr 再活化，沉淀为菱铁矿、铁橄榄石和菱锰矿。因此，方解石是 Floresta Azul 杂岩体正长岩侵入体中极其重要的矿物，可以描述自交代和热液阶段的成因、成分变化、现有结构和矿物学关联。导致 Fe-Mn-Sr 再活化，沉淀为菱铁矿、铁橄榄石和菱锰矿。因此，方解石是 Floresta Azul 杂岩体正长岩侵入体中极其重要的矿物，可以描述自交代和热液阶段的成因、成分变化、现有结构和矿物学关联。