Upper mantle lateral heterogeneities and magnetotelluric daily variation data

1987 ◽  
Vol 125 (2-3) ◽  
pp. 319-340 ◽  
Author(s):  
J. L. Counil ◽  
M. Menvielle ◽  
J. L. Le Mouel
Keyword(s):  
Upper Mantle ◽  
Daily Variation ◽  
Variation Data ◽  
Lateral Heterogeneities

The effects of upper-mantle lateral heterogeneities on postglacial rebound

1986 ◽  
Vol 13 (4) ◽  
pp. 337-340 ◽  
Author(s):  
Roberto Sabadini ◽  
David A. Yuen ◽  
Mark Portney
Keyword(s):  
Upper Mantle ◽  
Postglacial Rebound ◽  
Lateral Heterogeneities

scholarly journals Anelasticity and lateral heterogeneities in Earth's upper mantle: impact on surface displacements, self‐attraction and loading and ocean tide dynamics

2021 ◽  
Author(s):  
Pingping Huang ◽  
Roman Lucas Sulzbach ◽  
Yoshiyuki Tanaka ◽  
Volker Klemann ◽  
Henryk Dobslaw ◽  
...  
Keyword(s):  
Upper Mantle ◽  
Ocean Tide ◽  
Surface Displacements ◽  
Lateral Heterogeneities

Water Gas May Not Shift in Deep Earth

2020 ◽  
Author(s):  
Nore Stolte ◽  
Junting Yu ◽  
Zixin Chen ◽  
Dimitri A. Sverjensky ◽  
Ding Pan
Keyword(s):  
Formic Acid ◽  
Upper Mantle ◽  
Free Energy Calculations ◽  
Water Gas Shift ◽  
Ab Initio Molecular Dynamics ◽  
Water Gas Shift Reaction ◽  
Carbon Carrier ◽  
Deep Earth ◽  
Shift Reaction ◽  
Water Gas

The water-gas shift reaction is a key reaction in Fischer-Tropsch-type synthesis, which is widely believed to generate hydrocarbons in the deep carbon cycle, but is little known at extreme pressure-temperature conditions found in Earth’s upper mantle. Here, we performed extensive ab initio molecular dynamics simulations and free energy calculations to study the water-gas shift reaction. We found the direct formation of formic acid out of CO and supercritical water at 10∼13 GPa and 1400 K without any catalyst. Contrary to the common assumption that formic acid or formate is an intermediate product, we found that HCOOH is thermodynamically more stable than the products of the water-gas shift reaction above 3 GPa and at 1000∼1400 K. Our study suggests that the water-gas shift reaction may not happen in Earth’s upper mantle, and formic acid or formate may be an important carbon carrier, participating in many geochemical processes in deep Earth.<br>

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