Deep-Seated Xenolith of the Platinum-Bearing Websterite from the Paleoproterozoic Volchetundra Gabbro–Anorthosite Massif in the Kola Region

Abstract

The results of studying of the deep-seated platinum-bearing xenolith discovered in the Volchetundra gabbro-anorthosite massif in the Kola Region are presented. It is shown that xenolith 8.5 m × 4 m in size is composed of websterite in the central part and plagiowebsterite in the marginal zone. The chemical and mineral compositions of the xenolith rocks are examined; the data on the contents of noble and chalcophylic elements in them, as well as the mineral composition of platinum mineralization, are given.