Unusual rocks and mineralisation in a new carbonatite complex at Kandaguba, Kola Peninsula, Russia |
| |
Authors: | A N Pilipiuk V V Ivanikov and A G Bulakh |
| |
Institution: | a Department of Mineralogy, St. Petersburg University, University Emb. 7/9, 199034, St. Petersburg, Russia b Department of Petrography, St. Petersburg University, University Emb. 7/9, 199034, St. Petersburg, Russia |
| |
Abstract: | The paper presents the results from a reconnaissance investigation of carbonatites in a newly discovered alkaline complex in the Kola peninsula, Russia. The Kandaguba complex differs from other carbonatite plutons of the Kola alkaline province by (a) the absence of ultrabasic rocks, (b) widespread occurrence of nepheline-, cancrinite- and nepheline–cancrinite syenites and carbonatites and (c) presence of apatite–calcite ijolites and feldspar ijolites as separate intrusive phase. The Kandaguba carbonatites are notable for the predominance of late ferromagnesian varieties together with quartz and numerous accessory mineral species. The association of phosphates (monazite, gorseixite, goyazite, apatite), sulphides and tellurides (pyrite, sphalerite, galena, hessite), ilmenorutile, barite with quartz and ankerite is a remarkable feature of these carbonatites. The Kandaguba carbonatites are inferred to have been generated as the products of liquid immiscibility followed by differentiation of the carbonatite melt. |
| |
Keywords: | Author Keywords: Carbonatite Alkaline rocks Kandaguba complex Kola alkaline province Liquid immiscibility |
本文献已被 ScienceDirect 等数据库收录! |
|