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Dr Paul Beguelin
(e/fe)
Timau a rolau for Paul Beguelin
Cydymaith Ymchwil Ôl-ddoethurol
Trosolwyg
Y fantell yw cronfa ddŵr fwyaf y Ddaear, sy'n cynnwys 67% o'i màs. Mae astudio ei esblygiad thermocemegol trwy amser yn allweddol i'n dealltwriaeth o tectoneg platiau a thwf cyfandirol. Mae gan gyfnewidfeydd mantell crwst oblygiadau uniongyrchol hefyd ar y digonedd o ddŵr yn y gorffennol a'r presennol a bywyd arall sy'n cynnal folatilau ar wyneb y Ddaear.
Yn fy ngwaith, rwy'n defnyddio ac yn cynhyrchu data geocemegol ar lafas sy'n deillio o fantell gyda ffocws ar isotopau radiogenig, gyda'r nod o gyfyngu maint, natur ac oedran heterogenedd cyfansoddiad mantell ar y raddfa leol a byd-eang. I ddehongli'r data hyn, rwy'n dylunio modelau geocemegol cwbl feintiol sy'n integreiddio'r nifer o brosesau daearegol sy'n llywodraethu'r system mantell-gramen.
Fel rhan o ymdrech amlddisgyblaethol i astudio'r fantell, rwy'n cydweithio â geodynamegyddion yng Nghaerdydd ac mewn mannau eraill i gymharu fy nghanfyddiadau â rhai modelau cylchrediad mantell ar raddfa fawr ac ag arsylwadau geoffisegol o folcaniaeth sy'n deillio o fantell.
Cyhoeddiad
2026
- Polák, L. et al., 2026. Neodymium isotope constraints from global carbonatites on the possible presence of a long-lived enriched mantle reservoir. Lithos: Journal of Petrology, Mineralogy and Geochemistry 538-53 108599. (10.1016/j.lithos.2026.108599)
2025
- Béguelin, P. et al. 2025. Comparing geochemical and geodynamical models of plume and ridge mantle source composition. Geochemistry, Geophysics, Geosystems 26 (8) e2025GC012357. (10.1029/2025GC012357)
- Davies, J. H. et al. 2025. How to assess similarities and differences between mantle circulation models and Earth using disparate independent observations. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 481 (2315) 20240827. (10.1098/rspa.2024.0827)
- Béguelin, P. et al. 2025. Variations in Hawaiian plume flux controlled by ancient mantle depletion. AGU Advances 6 (2) e2024AV001434. (10.1029/2024av001434)
Articles
- Polák, L. et al., 2026. Neodymium isotope constraints from global carbonatites on the possible presence of a long-lived enriched mantle reservoir. Lithos: Journal of Petrology, Mineralogy and Geochemistry 538-53 108599. (10.1016/j.lithos.2026.108599)
- Béguelin, P. et al. 2025. Comparing geochemical and geodynamical models of plume and ridge mantle source composition. Geochemistry, Geophysics, Geosystems 26 (8) e2025GC012357. (10.1029/2025GC012357)
- Davies, J. H. et al. 2025. How to assess similarities and differences between mantle circulation models and Earth using disparate independent observations. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 481 (2315) 20240827. (10.1098/rspa.2024.0827)
- Béguelin, P. et al. 2025. Variations in Hawaiian plume flux controlled by ancient mantle depletion. AGU Advances 6 (2) e2024AV001434. (10.1029/2024av001434)