Istituto di Geoscienze e Georisorse     
Ragazzi E., Roghi G., Giaretta A., Gianolla P. Classification of amber based on thermal analysis. In: Thermochimica Acta, vol. 404 (1-2) pp. 43 - 54. Elsevier, 2003.
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. Thermal analysis of fossil resins appears therefore as a useful method that may improve the characterization of fossil resins and well correlates with the maturation grade.
URL: http://https://www.journals.elsevier.com/thermochimica-acta
Subject fossil resins
thermogravimetry analysis
elemental analysis

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