‘Premier’ evidence for prolonged kimberlite pipe formation and its influence on diamond transport from deep Earth

Geology ◽  
2018 ◽  
Vol 46 (10) ◽  
pp. 843-846 ◽  
Author(s):  
Sebastian Tappe ◽  
Ashish Dongre ◽  
Chuan-Zhou Liu ◽  
Fu-Yuan Wu
Keyword(s):  
Kimberlite Pipe ◽  
Deep Earth ◽  
Pipe Formation

The role of plicative structures as forecast criteria in the Alakit-Мarkhinsky field (western Yakutia)

2021 ◽  
pp. 6-13
Author(s):  
Dmitry Ivanov ◽  
Alexander Tolstov ◽  
Vyacheslav Ivanov
Keyword(s):  
Opposite Sign ◽  
Kimberlite Pipe ◽  
Pipe Formation ◽  
Regional Factors ◽  
Tectonic Features ◽  
Low Amplitude ◽  
Kimberlite Field

This paper describes the tectonic features of the Alakit-Markha kimberlite field, regional factors of kimberlite magmatism control in this area, structural and tectonic preconditions for kimberlite pipe prospecting. The paper highlights kimberlite pipe formation features and the role of tectonics in this process. The most promising areas are those related to low-amplitude negative structures (e.g. depressions), especially transverse low-amplitude complications of the opposite sign for the main plicative structure: for antiforms (elevations), these are saddle-shaped depressions, and antiform elevations are for synforms (depressions).

scholarly journals STRUCTURAL-COMPOSITIONAL MODEL OF THE NYURBINSKAYA KIMBERLITE PIPE FORMATION (SREDNE-MARKHA AREA OF THE YAKUTIAN DIAMONDIFEROUS PROVINCE)

2016 ◽  
Vol 7 (3) ◽  
pp. 435-458 ◽  
Author(s):  
A. S. Gladkov ◽  
D. A. Koshkarev ◽  
A. V. Cheremnykh ◽  
F. João ◽  
M. A. Karpenko ◽  
...  
Keyword(s):  
Kimberlite Pipe ◽  
Compositional Model ◽  
Pipe Formation

RUTILE-DIAMOND INTERGROWTHS FROM UDACHNAYA KIMBERLITE PIPE (YAKUTIA)

2017 ◽  
Vol 39 (3) ◽  
pp. 17-31
Author(s):  
V. Kvasnytsya ◽  
◽  
O. Vyshnevskyi ◽  
Keyword(s):  
Kimberlite Pipe

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>

scholarly journals Water–Gas Shift Reaction Produces Formate at Extreme Pressures and Temperatures in Deep Earth Fluids

2021 ◽  
pp. 4292-4298
Author(s):  
Nore Stolte ◽  
Junting Yu ◽  
Zixin Chen ◽  
Dimitri A. Sverjensky ◽  
Ding Pan
Keyword(s):  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Deep Earth ◽  
Shift Reaction ◽  
Water Gas
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