The investigation of monticellitolites and olivine–monticellite rocks from the Krestovskaya Intrusion shows that the major minerals (olivine and monticellite) have higher MgO content than the same minerals in olivinites and kugdites of the intrusion. In the studied rocks olivine contains 90–93 mol % Fo and monticellite has 41.6–42.3 mol % Fo, whereas olivine and monticellite in olivinites and kugdites contain 86–87 and 37.2–41.2 mol % Fo, respectively. Melt inclusion study in minerals of monticellite rocks demonstrates that the monticellite rocks of the Krestovskaya Intrusion were formed by mixing of volatile-rich melts of different composition: K-rich high-iron low-alumina kamafugitic melt and Na-rich high-magnesium high-alumina picritic melt. Minerals crystallized at high temperatures in the following sequence: perovskite I (1250–1230°C) → perovskite II (≥1200°C) ↔ olivine (>1200°C) → monticellite (>1150°C). Perovskite I in monticellite rocks, as well as olivine in olivinites, crystallized from K-rich high-iron (Mg# = MgO/(MgO + FeO) = 0.37), low-alumina kamafugitic melt. During crystallization of late perovskite II in the monticellite rocks, the melt became more enriched in MgO (Mg# = 0.41) and richer in Na₂O and Al₂O₃, which is intermediate in composition between kamafugite and alkali picrite. Olivine in the monticellite rocks crystallized from melts similar in composition to melilitite, having a K-rich composition with Mg# = 0.39, whereas monticellite formed from a heterogeneous high-Mg Si-undersaturated melt, which is highly enriched with volatile components (including H₂O) and salts. The crystallization of minerals was accompanied by subsequent accumulation of volatile components in mixing melts, silicate–carbonate liquid immiscibility under 1250–1190°C, and polyphase carbonate–salt immiscibility under below 1190°C. In the latter event, the exsolved carbonate melt began to split into simpler immiscible fractions: alkali–sulfate–carbonate, alkali–phosphate–carbonate, and calcio–carbonate.

对 Krestovskaya 侵入体中的蒙脱石和橄榄石-蒙脱石岩石的调查表明，主要矿物（橄榄石和蒙脱石）的 MgO 含量高于橄榄石和侵入岩中相同矿物的 MgO 含量。在所研究的岩石中，橄榄石含有 90-93 mol % 的Fo，蒙脱硅石含有 41.6-42.3 mol % 的Fo，而橄榄石和橄榄石中的橄榄石和蒙脱硅石含有 86-87 mol % 和 37.2-41.2 mol % 的Fo， 分别。蒙提长岩矿物熔体包裹体研究表明，Krestovskaya 侵入体的蒙提长石岩石是由不同成分的富含挥发分的熔体混合形成的：富钾高铁低铝卡玛富吉特熔体和富钠高镁高-氧化铝苦酸熔体。矿物在高温下按以下顺序结晶：钙钛矿 I (1250–1230°C) → 钙钛矿 II (≥1200°C) ↔ 橄榄石 (>1200°C) → 钙钛矿 (>1150°C)。蒙蒂硅石岩石中的钙钛矿 I，以及橄榄石中的橄榄石，由富钾高铁 (Mg# = MgO/(MgO + FeO) = 0.37)、低铝钾镁熔体熔体结晶。在蒙脱硅石岩石中晚期钙钛矿 II 的结晶过程中，熔体变得更富含 MgO (Mg# = 0.41) 并且更富含 Na ₂ O 和 Al ₂O ₃，其成分介于 kamafugite 和碱苦辉石之间。蒙脱石岩石中的橄榄石由与黄长石成分相似的熔体结晶而成，具有富钾成分，Mg# = 0.39，而蒙脱石则由非均相高镁硅不饱和熔体形成，富含挥发性成分（包括 H ₂ O) 和盐类。矿物结晶伴随着随后的混合熔体中挥发性成分的积累，1250-1190°C下的硅酸盐-碳酸盐液体不混溶，以及1190°C以下的多相碳酸盐-盐不混溶。在后一种情况下，溶解的碳酸盐熔体开始分裂成更简单的不混溶组分：碱金属-硫酸盐-碳酸盐、碱金属-磷酸盐-碳酸盐和钙-碳酸盐。