The nature and co-behaviour of volatile and non-volatile elements in the sub-continental lithospheric mantle ...
The lithospheric mantle represents a critical interface in global volatile cycles because it separates Earth’s convecting mantle from the rigid crust. Nevertheless, the source, abundance and flux of volatiles stored in this reservoir are poorly constrained. In this work, the concentrations of volati...
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
Apollo - University of Cambridge Repository
2021
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.17863/cam.90255 https://www.repository.cam.ac.uk/handle/1810/342836 |
| Summary: | The lithospheric mantle represents a critical interface in global volatile cycles because it separates Earth’s convecting mantle from the rigid crust. Nevertheless, the source, abundance and flux of volatiles stored in this reservoir are poorly constrained. In this work, the concentrations of volatiles stored both within the crystal lattice (H, Li, B, F, P and Cl) and fluid-inclusions (He and C) in mantle phases, together with their isotope compositions (3He/4H and 13C/12C), have been determined in 55 well-characterised peridotites and pyroxenites predominantly from off-craton mantle. The peridotites include spinel- and garnet-bearing lherzolites to harzburgites and are representative of the suites found at Kilbourne Hole, Colorado Plateau (SW USA), Tariat (Mongolia), West Eifel (Germany), Antarctic Peninsula, S. Patagonia, N.Tanzania and Ichinomegata (Japan). Their major and trace elements record a wide range in melt extraction (from 5 to 40%) but most xenoliths have undergone subsequent enrichment, via ... |
|---|