2013 Fiscal Year Final Research Report
Unraveling the structure of CO2- and H2O-bearing silicate melts
| Project/Area Number |
23244105
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Petrology/Mineralogy/Science of ore deposit
|
|---|
| Research Institution | Okayama University |
|---|
Principal Investigator |
XUE Xianyu 岡山大学, 地球物質科学研究センター, 准教授 (70362986)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KANZAKI Masami 岡山大学, 地球物質科学研究センター, 教授 (90234153)
|
|---|
| Project Period (FY) |
2011-04-01 – 2014-03-31
|
| Keywords | マグマ / ガラス / 構造 / 二酸化炭素 / 水 / 核磁気共鳴法 / 分光法 |
|---|
| Research Abstract |
In order to unravel the structure of H2O- and CO2- bearing silicate melts, we have synthesized silicate glasses of a range of compositions using piston cylinder apparatus and internally heated gas pressure vessel, and have characterized them by various NMR techniques as well as Raman spectroscopy. Quantum chemical calculations were also performed to assist data interpretation. This study has provided new insights into the compositional dependency of H2O and CO2 dissolution mechanisms in silicate melts. It was confirmed that CO2 is dissolved in depolymerized silicate melts dominantly as free carbonates, i.e. carbonate species not linked to the silicate network, and dominantly as network carbonates and molecular CO2 in fully polymerized silicate melts.
|
