Contrast compositions of kimberlites - genetic conclusions (Kuoyka field, Yakutia) ...

• Main Author: Kostrovitsky Sergey
• Format: Dataset
• Language: unknown
• Published: Zenodo 2023
• Subjects: Kuoyka; Yakutia
• Online Access: https://dx.doi.org/10.5281/zenodo.8211508; https://zenodo.org/record/8211508

The compositions (mineralogy, major- and trace-element chemistry of rocks and minerals, as well as Sr-Nd-Hf isotope systematics) of two kimberlite bodies, the Obnazhennaya pipe and the Velikan dyke from the Kuoyka field, Yakutian kimberlite province (YaKP), located close to each other (the distance is 1 km) and having the same Upper Jurassic age. The kimberlites of the two bodies are contrastingly different in composition. The Obnazhennaya pipe is composed of pyroclastic kimberlite of high-Mg, low-Ti of composition, characterized by high saturation of clastic material of the lithospheric mantle (CMLM). Pyroclastic kimberlite contains rare inclusions of coherent kimberlite from previous intrusion phases. The Velikan dyke is represented by coherent kimberlite of relatively high-Fe, high-Ti composition, having neither mantle xenoliths nor olivine xenocrysts. The similarity of isotope-geochemical characteristics for kimberlites of both bodies, and their spatial and temporal proximity suggests that their ...