Hydrolysis Products of Fe(III)-Si Systems With Different Si/(Si plus Fe) Molar Ratios: Implications to Detection of Ferrihydrite on Mars
文献类型：期刊论文
| 作者 | Xiang, Xinyi5,6; Du, Peixin5,6; Ye, Binlong1,4; Bu, Hongling2; Liu, Dong3 ; Liu, Jiacheng1,4; Hua, Jian2; Guo, Xiaolong5,6
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
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| 出版日期 | 2024-04-01 |
| 卷号 | 129期号:4页码:14 |
| 关键词 | ferrihydrite iron (oxyhydr)oxide Si Si-ferrihydrite spectroscopy Mars |
| ISSN号 | 2169-9097 |
| DOI | 10.1029/2023JE008031 |
| 英文摘要 | Ferrihydrite, a nanocrystalline iron (oxyhydr)oxide mineral, is widely distributed in soils and sediments on Earth and is probably an important component and/or precursor of widespread nanophase iron minerals on Mars. Terrestrial ferrihydrite often co-occurs with amorphous silica and/or contains a certain amount of Si in its structure. However, it remains ambiguous how environmental Si concentration affects the formation-evolution and structure-spectral features of ferrihydrite in the Fe(III)-Si systems. To this end, hydrolysis experiments were carried out for Fe-Si systems at an unprecedentedly wide range of initial Si/(Fe + Si) molar ratios (0-0.80), followed by characterizing the products detailly. X-ray diffraction, Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, Mossbauer spectroscopy, and transmission electron microscopy results showed that at Si/(Fe + Si) molar ratios <= 0.30, the main phase of the products was ferrihydrite, of which the unit cells enlarged, the crystallinity decreased, and the existing state of Fe changed with increased Si contents; at Si/(Fe + Si) molar ratios >= 0.40, ferrihydrite was no longer formed and a novel amorphous Fe-O-Si phase was instead obtained, with the excess Si forming amorphous silica. The visible and near-infrared spectroscopy, the most powerful tool to detect hydrous minerals on the surface of Mars at global or regional scales, showed weakness in identifying ferrihydrite-like materials obtained in the Fe-Si systems. Raman spectroscopy can identify ferrihydrite and Si-containing ferrihydrite but cannot differentiate between them. Mossbauer spectroscopy showed great potential in both identifying and differentiating between ferrihydrite and Si-containing ferrihydrite, and thus can be used to characterize the poorly ordered iron (oxyhydr)oxides on Mars. On the surface of ancient Mars where liquid water was available, Fe-Si hydrolysis systems were likely common as a result of the high abundances of Fe and Si in the crust of Mars. By performing hydrolysis experiments of Fe-Si systems at an unprecedented wide range of Si/(Fe + Si) molar ratios, we found that the hydrolysis products of Fe-Si systems varied among combinations of ferrihydrite, Si-containing ferrihydrite, an unknown Fe-O-Si phase, and amorphous silica. We also found that the visible and near-infrared reflectance spectroscopy, the most powerful tool to remotely detect hydrous minerals on the surface of Mars at global and regional scales, showed weakness in identifying ferrihydrite, Si-containing ferrihydrite, and the novel Fe-O-Si phase; Raman can be used to identify ferrihydrite-like materials but cannot be used to differentiate between ferrihydrite and Si-containing ferrihydrite; mid-infrared spectroscopy can differentiate ferrihydrite from Si-containing ferrihydrite and the novel Fe-O-Si phase; Mossbauer spectroscopy (recorded at varied temperatures) provided clues to identifying and further differentiating between ferrihydrite-like materials and thus holds great potential for detecting Fe/Si-rich phases on the surface of Mars. Hydrolysis experiments of Fe(III)-Si systems were performed at an unprecedentedly wide range of initial Si/(Fe + Si) molar ratios (0 similar to 0.80) The environmental Si concentration controls the formation and evolution of ferrihydrite in the Fe(III)-Si systems Mossbauer spectroscopy shows great potential in identifying and differentiating between ferrihydrite-like materials |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001194398500001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/77221]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Du, Peixin |
| 作者单位 | 1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China 2.Guangdong Acad Sci, Guangdong Inst Ecoenvironm Sci & Technol, Guangdong Key Lab Integrated Agroenvironm Pollut C, Guangzhou, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Ctr Excellence Deep Earth Sci, CAS Key Lab Mineral & Metallogeny,Guangdong Prov K, Guangzhou, Peoples R China 4.Univ Hong Kong, Lab Space Res, Hong Kong, Peoples R China 5.CNSA Macau Ctr Space Explorat & Sci, Macau, Peoples R China 6.Macau Univ Sci & Technol, State Key Lab Lunar & Planetary Sci, Macau, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiang, Xinyi,Du, Peixin,Ye, Binlong,et al. Hydrolysis Products of Fe(III)-Si Systems With Different Si/(Si plus Fe) Molar Ratios: Implications to Detection of Ferrihydrite on Mars[J]. JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS,2024,129(4):14. |
| APA | Xiang, Xinyi.,Du, Peixin.,Ye, Binlong.,Bu, Hongling.,Liu, Dong.,...&Guo, Xiaolong.(2024).Hydrolysis Products of Fe(III)-Si Systems With Different Si/(Si plus Fe) Molar Ratios: Implications to Detection of Ferrihydrite on Mars.JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS,129(4),14. |
| MLA | Xiang, Xinyi,et al."Hydrolysis Products of Fe(III)-Si Systems With Different Si/(Si plus Fe) Molar Ratios: Implications to Detection of Ferrihydrite on Mars".JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS 129.4(2024):14. |
入库方式： OAI收割
来源：广州地球化学研究所
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