Equations of State and Phase Boundaries of SiO2 Polymorphs Under Lower Mantle Conditions
文献类型：期刊论文
| 作者 | Li, Guoge1,3; Zhang, Zhiming1,3; Niu, Xiaoguang1,3; Liu, Jin2,4; Li, Juan1,3; Wang, Wei1; Zhang, Zhigang1,3 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 128期号:10页码:15 |
| ISSN号 | 2169-9313 |
| 关键词 | SiO2 first-principles phase boundary equation of state lower mantle anharmonicity |
| DOI | 10.1029/2023JB026774 |
| 英文摘要 | SiO2 is an important modally abundant component of terrestrial planets, while there are few studies that quantitatively determine the properties of silica under simultaneously high-temperature and high-pressure conditions. In this study, thermal properties of stishovite, CaCl2-type SiO2 and seifertite have been obtained by using extensive first-principles simulations. The quasi-harmonic approximation and intrinsic anharmonic effects were considered, and a generalized rescaling method was adopted to eliminate systematic errors in the simulation results. Based on the simulation data, we have established new equations of state for the SiO2 polymorphs and determined their phase boundaries. Anharmonicity has been demonstrated to show noticeable effects on their thermal properties and phase boundaries. With the new results, we found that SiO2 polymorphs show increasing buoyancy in the subducted basaltic slabs at depths greater than similar to 800-900 km. In the normal lower mantle, they are readily stable over a broad range of depths approximately from 1,500 km to 2,600 km. This implies that SiO2 polymorphs may contribute to the lateral heterogeneity in the deep lower mantle as observed by small-scale seismic scatterers. |
| WOS关键词 | AB-INITIO ; SEISMIC SCATTERERS ; OF-STATE ; THERMODYNAMIC PROPERTIES ; BULK COMPOSITION ; STISHOVITE ; PRESSURE ; TRANSITION ; SILICA ; TRANSFORMATIONS |
| 资助项目 | The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp[IGGCAS-202204] ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp[IGGCAS-201904] ; key research programs of IGGCAS[2022YFF0503203] ; National Key Ramp;D Program of China |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:001087085100001 |
| 资助机构 | The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; key research programs of IGGCAS ; key research programs of IGGCAS ; key research programs of IGGCAS ; key research programs of IGGCAS ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; key research programs of IGGCAS ; key research programs of IGGCAS ; key research programs of IGGCAS ; key research programs of IGGCAS ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; key research programs of IGGCAS ; key research programs of IGGCAS ; key research programs of IGGCAS ; key research programs of IGGCAS ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; The authors are grateful to two anonymous reviewers for their constructive comments and to Yves Bernabe for handling our manuscript. This work was supported by the key research programs of IGGCAS (IGGCAS-202204 and IGGCAS-201904) and the National Key Ramp ; key research programs of IGGCAS ; key research programs of IGGCAS ; key research programs of IGGCAS ; key research programs of IGGCAS ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110714]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Zhang, Zhigang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 2.Yanshan Univ, Ctr High Pressure Sci CHiPS, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 4.CAS Ctr Excellence Deep Earth Sci, Guangzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Guoge,Zhang, Zhiming,Niu, Xiaoguang,et al. Equations of State and Phase Boundaries of SiO2 Polymorphs Under Lower Mantle Conditions[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2023,128(10):15. |
| APA | Li, Guoge.,Zhang, Zhiming.,Niu, Xiaoguang.,Liu, Jin.,Li, Juan.,...&Zhang, Zhigang.(2023).Equations of State and Phase Boundaries of SiO2 Polymorphs Under Lower Mantle Conditions.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,128(10),15. |
| MLA | Li, Guoge,et al."Equations of State and Phase Boundaries of SiO2 Polymorphs Under Lower Mantle Conditions".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 128.10(2023):15. |
入库方式： OAI收割
来源：地质与地球物理研究所
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