Classification of amber based on thermal analysis
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- 作者：Ragazzi ; Eugenio ; Roghi ; Guido ; Giaretta ; Aurelio ; Gianolla ; Piero
- 关键词：Fossil resins ; Amber ; Thermogravimetric analysis ; Elemental analysis
- 刊名：Thermochimica Acta
- 出版年：2003
- 出版时间：September 4, 2003
- 年：2003
- 卷：404
- 期：1-2
- 页码：43-54
- 全文大小：197 K
文摘
The present study considered a possible way of classifying fossil and sub-fossil resins by means of thermal analysis, by using thermogravimetric (TG) and differential thermogravimetric (DTG) profiles. We used samples of resins of different origin and ages, ranging from present-day to Triassic (225 million years ago (Ma)), in order to extend the knowledge of thermal patterns of very ancient resins. Under differential thermogravimetric analysis, all the samples presented a main exothermal event, whose temperature varied among resins of different age. The increasing value of the main exothermal peak varies with the increase of the age of the specimen and a significant linear correlation was found (r=0.701, P<0.01) with a slope of 0.216. Additional information came in relation to paleobotanical origin, lithology and diagenesis of the fossil samples.