Different Cooling Histories of Ultrahigh-Temperature Granulites Revealed by Ti-in-Quartz: An Electron Microprobe Approach
文献类型：期刊论文
| 作者 | Zhang, Di1,2; Chen, Yi1,2; Mao, Qian1; Jiao, Shujuan1; Su, Bin1; Chen, Si3; Sein, Kyaing4 |
| 刊名 | CRYSTALS
 |
| 出版日期 | 2023-07-01 |
| 卷号 | 13期号:7页码:16 |
| 关键词 | TitaniQ thermometer UHT granulites cooling behavior electron probe microanalysis diffusion |
| DOI | 10.3390/cryst13071116 |
| 英文摘要 | The cooling history of granulite is crucial to understanding tectonic scenarios of the continental crust. Ti-in-quartz, a useful indicator of temperature, can decipher the thermal evolution of crustal rocks. Here we apply the Ti-in-quartz (TitaniQ) thermometer to ancient ultrahigh-temperature (UHT) granulites from the Khondalite Belt (KB) in the North China Craton (NCC) and young UHT granulites from the Mogok Metamorphic Belt (MMB), Myanmar. Ti content in quartz was analyzed using a highly precise method constructed in a CAMECA SXFive electron probe microanalyzer (EPMA). The granulites from the two localities show different quartz Ti contents with a constant deforced beam of 10 & mu;m. Matrix quartz and quartz inclusions from the NCC granulites have 57-241 ppm and 65-229 ppm, respectively, corresponding to the TitaniQ temperatures of 653-810 & DEG;C and 666-807 & DEG;C. The calculated temperatures are significantly lower than the peak temperatures (850-1096 & DEG;C) obtained by other methods, due to the formation of abundant rutile exsolution rods in quartz during cooling. Thus, the low calculated temperatures for the NCC granulites reflect a cooling state near or after the exsolution of rutile from quartz, most likely caused by a slow cooling process. However, the matrix quartz from the MMB granulites is exsolution-free and records higher Ti contents of 207-260 ppm and higher metamorphic temperatures of 894-926 & DEG;C, close to the peak UHT conditions. This feature indicates that the MMB granulites underwent rapid cooling to overcome Ti loss from quartz. Therefore, determining the amount of Ti loss from quartz by diffusion can provide new insight into the cooling behavior of UHT granulites. When a large deforced beam of 50 & mu;m was used to cover the rutile rods, the matrix quartz in the KB granulites could also yield the TitaniQ temperatures above 900 & DEG;C. Thus, our new data suggest that the TitaniQ thermometer could be useful for revealing UHT conditions. |
| WOS关键词 | MOGOK METAMORPHIC BELT ; NORTH CHINA CRATON ; KHONDALITE BELT ; HYDROTHERMAL QUARTZ ; PELITIC GRANULITES ; PHASE-EQUILIBRIA ; TRACE-ELEMENTS ; ICP-MS ; ZIRCON ; TITANIQ |
| WOS研究方向 | Crystallography ; Materials Science |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:001035138100001 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/111324]  |
| 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 | Chen, Yi |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 3.Guangzhou Marine Geol Survey, Guangzhou 511458, Peoples R China 4.Hlaing Univ Campus, Myanmar Geosci Soc, Yangon 11041, Myanmar |
| 推荐引用方式 GB/T 7714 | Zhang, Di,Chen, Yi,Mao, Qian,et al. Different Cooling Histories of Ultrahigh-Temperature Granulites Revealed by Ti-in-Quartz: An Electron Microprobe Approach[J]. CRYSTALS,2023,13(7):16. |
| APA | Zhang, Di.,Chen, Yi.,Mao, Qian.,Jiao, Shujuan.,Su, Bin.,...&Sein, Kyaing.(2023).Different Cooling Histories of Ultrahigh-Temperature Granulites Revealed by Ti-in-Quartz: An Electron Microprobe Approach.CRYSTALS,13(7),16. |
| MLA | Zhang, Di,et al."Different Cooling Histories of Ultrahigh-Temperature Granulites Revealed by Ti-in-Quartz: An Electron Microprobe Approach".CRYSTALS 13.7(2023):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
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