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Carbonatite magmatism of the southern Siberian Craton 1 Ga ago: Evidence for the beginning of breakup of Laurasia in the early Neoproterozoic
Citation
Savelieva, VB and Danilova, YV and Bazarova, EP and Ivanov, AV and Kamenetsky, VS, Carbonatite magmatism of the southern Siberian Craton 1 Ga ago: Evidence for the beginning of breakup of Laurasia in the early Neoproterozoic, Doklady Earth Sciences, 471, (1) pp. 1140-1143. ISSN 1028-334X (2016) [Refereed Article]
Copyright Statement
Copyright Pleiades Publishing, Ltd.
DOI: doi:10.1134/S1028334X16110222
Abstract
Apatite and biotite from dolomite‒ankerite and calcite‒dolomite carbonatite dikes emplaced into the Paleoproterozoic metamorphic rock complex in the southern part of the Siberian Craton are dated by the U–Pb (LA-ICP-MS) and 40Ar–39Ar methods, respectively. Proceeding from the lower intercept of discordia with concordia, the age of apatite from calcite‒dolomite carbonatite is estimated to be 972 ± 21 Ma and that for apatite from dolomite‒ankerite carbonatite, as 929 ± 37 Ma. Values derived from their upper intercept have no geological sense. The ages obtained for biotite by the 40Ar–39Ar method are 965 ± 9 and 975 ± 14 Ma. It means that the formation of carbonatites reflects the earliest phases of the Neoproterozoic stage in extension of the continental lithosphere.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Research Division: | Earth Sciences |
| Research Group: | Geology |
| Research Field: | Igneous and Metamorphic Petrology |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding Knowledge |
| Objective Field: | Expanding Knowledge in the Earth Sciences |
| Author: | Kamenetsky, VS (Professor Vadim Kamenetsky) |
| ID Code: | 113384 |
| Year Published: | 2016 |
| Funding Support: | Australian Research Council (DP130100257) |
| Deposited By: | Earth Sciences |
| Deposited On: | 2016-12-22 |
| Last Modified: | 2017-02-22 |
| Downloads: | 0 |
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