{"title":"A Raman Geothermometer for Carbonaceous Chondrites","authors":"S. A. Voropaev, A. P. Krivenko, N. V. Dushenko","doi":"10.1134/S1028335823100075","DOIUrl":null,"url":null,"abstract":"<p>Samples of the Murchison meteorite (carbonaceous chondrite, type CM2) were kept isothermally in a specially designed device at temperatures of 200, 500, and 800°C. After the samples cooled down in an inert helium atmosphere, Raman scattering spectra were taken. An increase in the intensity of the G- and D‑lines of graphite was detected depending on the degree of heating. It is shown that using such a characteristic parameter of these lines as the area ratio, S<sub>D</sub>/S<sub>G</sub>, it is possible to define a geothermometer to determine the maximum temperature of thermal metamorphism of the parent bodies of carbonaceous chondrites. A comparison with the known data for carbonaceous chondrite Allende (CV3), which has experienced a significant thermal metamorphism, is carried out.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 10","pages":"345 - 348"},"PeriodicalIF":0.6000,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Doklady Physics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1028335823100075","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MECHANICS","Score":null,"Total":0}
引用次数: 0
Abstract
Samples of the Murchison meteorite (carbonaceous chondrite, type CM2) were kept isothermally in a specially designed device at temperatures of 200, 500, and 800°C. After the samples cooled down in an inert helium atmosphere, Raman scattering spectra were taken. An increase in the intensity of the G- and D‑lines of graphite was detected depending on the degree of heating. It is shown that using such a characteristic parameter of these lines as the area ratio, SD/SG, it is possible to define a geothermometer to determine the maximum temperature of thermal metamorphism of the parent bodies of carbonaceous chondrites. A comparison with the known data for carbonaceous chondrite Allende (CV3), which has experienced a significant thermal metamorphism, is carried out.
摘要 将默奇森陨石（CM2 型碳质软玉）样品等温保存在一个专门设计的装置中，温度分别为 200、500 和 800°C。样品在惰性氦气环境中冷却后，进行拉曼散射光谱测定。根据加热程度的不同，可以检测到石墨 G 线和 D 线强度的增加。研究表明，利用这些线的特征参数，如面积比（SD/SG），可以确定一个地球温度计，以确定碳质软玉母体热变质的最高温度。与经历过重大热变质作用的碳质软玉阿连德（CV3）的已知数据进行了比较。
期刊介绍：
Doklady Physics is a journal that publishes new research in physics of great significance. Initially the journal was a forum of the Russian Academy of Science and published only best contributions from Russia in the form of short articles. Now the journal welcomes submissions from any country in the English or Russian language. Every manuscript must be recommended by Russian or foreign members of the Russian Academy of Sciences.
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