Silicon isotope fractionation during the precipitation of quartz and the adsorption of H4SiO4(aq) on Fe(III)-oxyhydroxide surfaces

2015 ◽  
Vol 34 (4) ◽  
pp. 459-468 ◽  
Author(s):  
Hong-tao He ◽  
Yun Liu
Keyword(s):  
Isotope Fractionation ◽  
Silicon Isotope

scholarly journals Silicon Isotope Geochemistry: Fractionation Linked to Silicon Complexations and Its Geological Applications

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1415 ◽  
Author(s):  
Wang ◽  
Wei ◽  
Jiang ◽  
Liu ◽  
Lei ◽  
...  
Keyword(s):  
Chemical Weathering ◽  
Isotope Fractionation ◽  
Isotope Geochemistry ◽  
Ore Deposits ◽  
Silicon Isotope ◽  
Core Formation ◽  
Silicon Isotopes ◽  
Silica Precipitation ◽  
Geological Processes ◽  
Biological Uptake

The fundamental advances in silicon isotope geochemistry have been systematically demonstrated in this work. Firstly, the continuous modifications in analytical approaches and the silicon isotope variations in major reservoirs and geological processes have been briefly introduced. Secondly, the silicon isotope fractionation linked to silicon complexation/coordination and thermodynamic conditions have been extensively stressed, including silicate minerals with variable structures and chemical compositions, silica precipitation and diagenesis, chemical weathering of crustal surface silicate rocks, biological uptake, global oceanic Si cycle, etc. Finally, the relevant geological implications for meteorites and planetary core formation, ore deposits formation, hydrothermal fluids activities, and silicon cycling in hydrosphere have been summarized. Compared to the thermodynamic isotope fractionation of silicon associated with high-temperature processes, that in low-temperature geological processes is much more significant (e.g., chemical weathering, biogenic/non-biogenic precipitation, biological uptake, adsorption, etc.). The equilibrium silicon isotope fractionation during the mantle-core differentiation resulted in the observed heavy isotope composition of the bulk silicate Earth (BSE). The equilibrium fractionation of silicon isotopes among silicate minerals are sensitive to the Si–O bond length, Si coordination numbers (CN), the polymerization degrees of silicate unites, and the electronegativity of cations in minerals. The preferential enrichment of different speciation of dissoluble Si (DSi) (e.g., silicic acid H4SiO40 (H4) and H3SiO4− (H3)) in silica precipitation and diagenesis, and chemical weathering, lead to predominately positive Si isotope signatures in continental surface waters, in which the dynamic fractionation of silicon isotope could be well described by the Rayleigh fractionation model. The role of complexation in biological fractionations of silicon isotopes is more complicated, likely involving several enzymatic processes and active transport proteins. The integrated understanding greatly strengthens the potential of δ30Si proxy for reconstructing the paleo terrestrial and oceanic environments, and exploring the meteorites and planetary core formation, as well as constraining ore deposits and hydrothermal fluid activity.

Adsorption Behavior of Metasilicate on N-Methyl d-Glucamine Functional Groups and Associated Silicon Isotope Fractionation

Langmuir ◽  
2016 ◽  
Vol 32 (35) ◽  
pp. 8872-8881 ◽  
Author(s):  
Wei Wang ◽  
Hai-Zhen Wei ◽  
Shao-Yong Jiang ◽  
Christopher J. Eastoe ◽  
Qi Guo ◽  
...  
Keyword(s):  
Functional Groups ◽  
Isotope Fractionation ◽  
Adsorption Behavior ◽  
Silicon Isotope

scholarly journals Experimental Determination of Silicon Isotope Fractionation in Rice

PLoS ONE ◽  
2016 ◽  
Vol 11 (12) ◽  
pp. e0168970 ◽  
Author(s):  
Yan Sun ◽  
Liang-huan Wu ◽  
Xiao-yan Li
Keyword(s):  
Experimental Determination ◽  
Isotope Fractionation ◽  
Silicon Isotope

Silicon isotope fractionation during FZ growth of silicon crystals

2003 ◽  
Vol 203-204 ◽  
pp. 802-805 ◽  
Author(s):  
Y. Morishita ◽  
H. Satoh
Keyword(s):  
Isotope Fractionation ◽  
Silicon Isotope ◽  
Silicon Crystals

Silicon isotope fractionation in bamboo and its significance to the biogeochemical cycle of silicon

2008 ◽  
Vol 72 (5) ◽  
pp. 1381-1395 ◽  
Author(s):  
T.P. Ding ◽  
J.X. Zhou ◽  
D.F. Wan ◽  
Z.Y. Chen ◽  
C.Y. Wang ◽  
...  
Keyword(s):  
Isotope Fractionation ◽  
Biogeochemical Cycle ◽  
Silicon Isotope

Experimental constraints on kinetic and equilibrium silicon isotope fractionation during the formation of non-biogenic chert deposits

2015 ◽  
Vol 402 ◽  
pp. 40-51 ◽  
Author(s):  
Desiree L. Roerdink ◽  
Sander H.J.M. van den Boorn ◽  
Sonja Geilert ◽  
Pieter Z. Vroon ◽  
Manfred J. van Bergen
Keyword(s):  
Isotope Fractionation ◽  
Silicon Isotope

Silicon isotope fractionation in some surface processes (A study on river water and plants)

1998 ◽  
Vol 43 (S1) ◽  
pp. 33-33 ◽  
Author(s):  
T. Ding ◽  
C. Wang ◽  
F. Zhang ◽  
D. Wan
Keyword(s):  
River Water ◽  
Isotope Fractionation ◽  
Surface Processes ◽  
Silicon Isotope
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