Finding of corundum-bearing rocks in the Lapland granulite belt
- 作者: Terekhov E.1, Shcherbakova T.1, Konilov A.1
-
隶属关系:
- Geological Institute
- 期: 卷 470, 编号 1 (2016)
- 页面: 914-920
- 栏目: Geology
- URL: https://journals.rcsi.science/1028-334X/article/view/188846
- DOI: https://doi.org/10.1134/S1028334X16090208
- ID: 188846
如何引用文章
详细
Corundum-bearing rocks are described for the first time in the Kandalaksha structure of the Lapland granulite belt. Corundum is confined to rocks of two types: metagabbro‒anorthosites constituting lenses among metaanarthosites of the Kandalaksha massif and basic granulites. Corundum crystals (up to 200 μm long) occur in plagioclase and garnet and differ from each other depending on the host mineral, which serves as evidence against their xenogenic nature. Some corundum crystals exhibit an axial zone, which may indicate their crystallization from the gaseous phase. Corundum-bearing rocks are accompanied by piclogites (pyroxene‒garnet varieties with olivine). Piclogites and their minerals (clinopyroxene, garnet) are characterized by a positive Eu anomaly, which implies rock reworking by fluids during corundum formation, when deep-seated complexes were subjected to exhumation.
作者简介
E. Terekhov
Geological Institute
编辑信件的主要联系方式.
Email: terex@ilran.ru
俄罗斯联邦, Pyzhevskii per. 7, Moscow, 119017
T. Shcherbakova
Geological Institute
Email: terex@ilran.ru
俄罗斯联邦, Pyzhevskii per. 7, Moscow, 119017
A. Konilov
Geological Institute
Email: terex@ilran.ru
俄罗斯联邦, Pyzhevskii per. 7, Moscow, 119017