Nature of Rare Earth Element Heterogeneity in Intricate Pipes of the Daldyn-Alakit Region, Yakutia

The majority of works devoted to differentiation ofphases of kimberlite melt emplacement in the intricatepipes are based on geological, mineralogical, and pet-rochemical data, whereas their geochemistry has notbeen studied well. The main aim of this study was toscrutinize the rare earth composition of intricate kim-berlite pipes and to identify the geochemical features ofdifferent phases using the pipes of the Daldyn–Alakitregion as an example. Independent phases of meltemplacement can bear different diamond potentials.Most of the large kimberlite pipes of the Daldyn–Alakit region, which comprises the Daldyn and Alakit–Markha fields, are intricate bodies consisting of two ormore independent kimberlite melt phases [1]. Kimber-lite phases are typically identified on the basis of theirchemical composition, especially on the content ofinert components (TiO