| Title | Evolution of carbonatite magmas in the upper mantle and crust |
| |
| Author | Yaxley, G M; Kjarsgaard, B A ; Jacques, A L |
| Source | Elements: An International Magazine of Mineralogy, Geochemistry, and Petrology vol. 17, issue 5, 2021 p. 315-320, https://doi.org/10.2138/gselements.17.5.315  Open
Access |
| Image |  |
| Year | 2021 |
| Alt Series | Natural Resources Canada, Contribution Series 20210270 |
| Publisher | MSA |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Subjects | surficial geology/geomorphology; carbonatites; mantle; partial melting; immiscibility, liquid; crystal fractionation; silicates |
| Illustrations | schematic diagrams; figures; ternary diagrams; images |
| Released | 2021 12 01 |
| Abstract | Carbonatites are the most silica-poor magmas known and are amongst Earth's most enigmatic igneous rocks. They crystallise to rocks dominated by the carbonate minerals calcite and dolomite. We review
models for carbonatite petrogenesis, including direct partial melting of mantle lithologies, exsolution from silica-undersaturated alkali silicate melts, or direct fractionation of carbonated silicate melts to carbonate-rich residual melts. We also
briefly discuss carbonatite-mantle wall-rock reactions and other processes at mid- to upper crustal depths, including fenitisation, overprinting by carbohydrothermal fluids, and reaction between carbonatite melt and crustal lithologies. |
| Summary | (Plain Language Summary, not published)
A synopsis of experimental petrology studies on carbonatites and field studies and other observations, with respect to economic mineralization for
critical metals. |
| GEOSCAN ID | 328924 |
|
|