Influences of CO2 on the Microstructure in Sheared Olivine Aggregates
文献类型：期刊论文
| 作者 | Zhang, Huihui1,2,3; Zhao, Ningli4; Qi, Chao1,2; Huang, Xiaoge1,2; Hirth, Greg4 |
| 刊名 | MINERALS
 |
| 出版日期 | 2021-05-01 |
| 卷号 | 11期号:5页码:17 |
| 关键词 | olivine aggregates CO2 crystallographic preferred orientation AG-type fabric |
| DOI | 10.3390/min11050493 |
| 英文摘要 | Shear deformation of a solid-fluid, two-phase material induces a fluid segregation process that produces fluid-enriched bands and fluid-depleted regions, and a crystallographic preferred orientation (CPO) characterized by girdles of [100] and [001] axes sub-parallel to the shear plane and a cluster of [010] axes sub-normal to the shear plane, namely the AG-type fabric. Based on experiments of two-phase aggregates of olivine + basalt, a two-phase flow theory and a CPO formation model were established to explain these microstructures. Here, we investigate the microstructure in a two-phase aggregate with supercritical CO2 as the fluid phase and examine the theory and model, to evaluate differences in rheological properties due to the presence of CO2 or basaltic melt. We conducted high-temperature and high-pressure shear deformed experiments at 1 GPa and 1100 degrees C in a Griggs-type apparatus on samples made of olivine + dolomite, which decomposed into carbonate melt and CO2 at experimental conditions. After deformation, CO2 segregation and an AG-type fabric were observed in these CO2-bearing samples, similar to basaltic melt-bearing samples. An SPO-induce CPO model was used to explain to the formation of the fabric. Our results suggest that the influences of CO2 as a fluid phase on the microstructure of a two-phase olivine aggregate is similar to that of basaltic melt and can be explained by the CPO formation model for the solid-fluid system. |
| WOS关键词 | DRIVEN MELT SEGREGATION ; UPPER-MANTLE ; VISCOUS ANISOTROPY ; FLUID DISTRIBUTION ; DIFFUSION CREEP ; ROCKS ; DEFORMATION ; CONSEQUENCES ; CONSTRAINTS ; PERIDOTITE |
| 资助项目 | NSF[EAR-1624178] ; NSFC[41574089] ; NSFC[41774096] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000662455000001 |
| 出版者 | MDPI |
| 资助机构 | NSF ; NSF ; NSF ; NSF ; NSFC ; NSFC ; NSFC ; NSFC ; NSF ; NSF ; NSF ; NSF ; NSFC ; NSFC ; NSFC ; NSFC ; NSF ; NSF ; NSF ; NSF ; NSFC ; NSFC ; NSFC ; NSFC ; NSF ; NSF ; NSF ; NSF ; NSFC ; NSFC ; NSFC ; NSFC |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102061]  |
| 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 | Huang, Xiaoge |
| 作者单位 | 1.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02906 USA |
| 推荐引用方式 GB/T 7714 | Zhang, Huihui,Zhao, Ningli,Qi, Chao,et al. Influences of CO2 on the Microstructure in Sheared Olivine Aggregates[J]. MINERALS,2021,11(5):17. |
| APA | Zhang, Huihui,Zhao, Ningli,Qi, Chao,Huang, Xiaoge,&Hirth, Greg.(2021).Influences of CO2 on the Microstructure in Sheared Olivine Aggregates.MINERALS,11(5),17. |
| MLA | Zhang, Huihui,et al."Influences of CO2 on the Microstructure in Sheared Olivine Aggregates".MINERALS 11.5(2021):17. |
入库方式： OAI收割
来源：地质与地球物理研究所
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