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  2. 地质与地球物理研究所
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  4. 岩石圈演化国家重点实验室
In Situ High-Pressure Raman Spectroscopic, Single-Crystal X-ray Diffraction, and FTIR Investigations of Rutile and TiO2II

文献类型：期刊论文

作者Lu, Xiaofeng1,2; Gao, Shuchang1,2; Wu, Peiyan1,2; Zhang, Ziyu1; Zhang, Li1; Li, Xiaoguang3; Qin, Xueqing4
刊名MINERALS
出版日期2023-05-21
卷号13期号:5页码:11
关键词rutile TiO2II in situ high-pressure Raman spectroscopy X-ray diffraction FTIR spectroscopy
DOI10.3390/min13050703
英文摘要In ultrahigh-pressure (UHP) metamorphic rocks, rutile is an important accessory mineral. Its high-pressure polymorph TiO2II can be a significant indicator of pressure in the diamond stability field. In the present study, in situ high-pressure Raman spectroscopic measurements of natural rutile in UHP eclogite from the main hole of the Chinese Continental Scientific Drilling Project (CCSD) have been conducted up to similar to 16 GPa. Rutile and recovered TiO2II have also been analyzed via single-crystal X-ray diffraction and FTIR spectroscopy. The results indicate that (1) the phase transition from rutile to baddeleyite-type TiO2 terminates at about 16 GPa under compression at ambient temperature; (2) the metastable TiO2II in the exhumated UHP rocks formed during deep continental subduction can be characterized by a highly distorted octahedral site in the crystal structure. X-ray powder diffraction analyses (with Cu Ka radiation) at ambient conditions are sufficient for identifying the lamellae of TiO2II within natural rutile based on the angles (2 theta) of two strong peaks at 25.5 degrees and 31.5 degrees; (3) rutile and recovered TiO2II in the continental slabs can contain certain amounts of water during deep subduction and exhumation. The estimated water contents of rutile in the present study range from 1590 to 1780 ppm of H2O by weight. In the crystal structure of TiO2II, hydrogen can be incorporated close to the long O-O edges (>2.5143 A) of the TiO6 octahedra. Further studies on the pressure-temperature stability of hydroxyls in rutile and TiO2II may help to understand the transportation and release of water in subducted continental slabs.
WOS关键词SCIENTIFIC DRILLING PROJECT ; DABIE MOUNTAINS ; HYDROGEN ; OH ; ABSORPTION ; MINERALS ; ECLOGITE ; PHASES ; ROCKS ; WATER
资助项目National Natural Science Foundation of China[42172044] ; National Natural Science Foundation of China[41802035]
WOS研究方向Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
语种英语
出版者MDPI
WOS记录号WOS:000996868300001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/110965]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Zhang, Li
作者单位1.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
2.Ctr High Pressure Sci & Technol Adv Res, Beijing 100193, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
推荐引用方式
GB/T 7714		 Lu, Xiaofeng,Gao, Shuchang,Wu, Peiyan,et al. In Situ High-Pressure Raman Spectroscopic, Single-Crystal X-ray Diffraction, and FTIR Investigations of Rutile and TiO2II[J]. MINERALS,2023,13(5):11.
APA Lu, Xiaofeng.,Gao, Shuchang.,Wu, Peiyan.,Zhang, Ziyu.,Zhang, Li.,...&Qin, Xueqing.(2023).In Situ High-Pressure Raman Spectroscopic, Single-Crystal X-ray Diffraction, and FTIR Investigations of Rutile and TiO2II.MINERALS,13(5),11.
MLA Lu, Xiaofeng,et al."In Situ High-Pressure Raman Spectroscopic, Single-Crystal X-ray Diffraction, and FTIR Investigations of Rutile and TiO2II".MINERALS 13.5(2023):11.

入库方式： OAI收割

来源：地质与地球物理研究所

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