Effect of bridgmanite-ferropericlase grain size evolution on Earth’s average mantle viscosity: implications for mantle convection in early and present-day Earth
Jyotirmoy Paul, Gregor J Golabek, Antoine B Rozel, Paul J Tackley, Tomoo Katsura, Hongzhan Fei · 2024
Read Effect of bridgmanite-ferropericlase grain size evolution on Earth’s average mantle viscosity: implications for mantle convection in early and present-day Earth by Jyotirmoy Paul, Gregor J Golabek, Antoine B Rozel, Paul J Tackley, Tomoo Katsura, Hongzhan Fei (2024) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-11615032.txt.
Description
Jyotirmoy Paul and co-authors model whether grain growth in Earth's lower mantle changes how stiffly the mantle flows. Their 2024 study uses computer simulations of mantle convection across Earth's history. Lab work suggests the two main lower-mantle minerals grow grains very slowly, which had raised hopes that grain size strongly sets viscosity.
Across many model variants, temperature, not grain size, ruled mantle viscosity. Slow grain growth in the deep mantle kept size changes too small to matter. Where grains grew fast, flow shifted to a regime where size no longer counts. The team varied many other settings and got the same answer for today's Earth, though the young Earth may have differed.
Catalog record
| CREATOR | Jyotirmoy Paul, Gregor J Golabek, Antoine B Rozel, Paul J Tackley, Tomoo Katsura, Hongzhan Fei |
|---|---|
| YEAR | 2024 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 65 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |