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通过矿物微区成分和图象分析,研究了在金伯利岩中发现的多种氧化物矿物的成分、结构特点及其相互关系.指出富含硅酸盐不相容元素的地幔流体交代、熔融先期形成的矿物以及充填作用,形成了近年来我国和南非金伯利岩中发现的多种新矿物相,包括沂蒙矿系列、蒙山矿系列、K-Cr柱红石、阿玛科矿、Zr-Ti氧化物(锆钛矿)、REE-Ti氧化物(铈钛矿)等.这些新矿物高度富集了K,Ba,Ca,Sr,Ti,Zr,REE等不相容元素.研究表明不相容元素的显交代作用可分早、中、晚3个阶段,各阶段不相容元素的富集程度、温压条件及流体的动力学特征等既有明显的差异性,又有一定的继承性
Through the analysis of mineral micro-composition and image analysis, the composition, structure characteristics and interrelationships of various oxide minerals found in kimberlite were studied. It is pointed out that the replacement of mantle fluid with silicate incompatible elements and the pre-melting mineralization and filling have resulted in the formation of various new mineralogical phases discovered in China and kimberlite in South Africa in recent years, including the Yimeng series, Series, K-Cr, rutile, Amaco, Zr-Ti oxide (zirconium oxide), REE-Ti oxide (cerium oxide) and the like. These new minerals are highly enriched in K, Ba, Ca, Sr, Ti, Zr, REE and other incompatible elements. The results show that the incompatible elements can be divided into three stages: the early, middle and late stages, the enrichment degree of incompatible elements in different stages, the temperature-pressure conditions and the dynamic characteristics of fluids, Have some succession