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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/7058

Title: Terpenoid composition and class of Tertiary resins from India
Authors: DUTTA, S
MALLICK, M
BERTRAM, N
GREENWOOD, PF
MATHEWS, RP
Keywords: extant dammar resins
crude oils
chemical-composition
natural resins
plant resins
surma basin
fossil
bicadinanes
biomarker
origin
Issue Date: 2009
Publisher: ELSEVIER SCIENCE BV
Citation: INTERNATIONAL JOURNAL OF COAL GEOLOGY, 80(1), 44-50
Abstract: The terpenoid composition and class of Tertiary resins preserved within lignites of Cambay, Kutch and Cauvery Basins of India have been characterized using Pyrolysis-Gas Chromatography-Mass Spectrometry (Py-GC-MS) and Fourier Transform Infrared (FTIR) Spectroscopy. Major pyrolysis products include cadalene-based C(15)-bicyclic sesqwterpenoids with some C(30) and C(31) bicadinanes and bicadinenes typical of Class 11 or dammar resin. The occurrence of these terpenoids in Early Eocene sediments may extend the first appearance of Dipterocarpaceae angiosperms, the predominant source of this resin class, back to the Early Eocene epoch in India. The same terpenoid biomarkers have been detected in many SE Asian oils reflecting a close source relationship with these resins. Strong CH(3) (1377 cm(-1)) and other CH(x) (3000-2800 and 1460-1450 cm(-1)) aliphatic absorptions of much larger intensity than the aromatic C = C (560-1650 cm(-1)) absorption were detected in the Indian resins by FTIR Spectroscopy, confirming the quantitative significance of the terpenoid pyrolysates. (C) 2009
URI: http://dx.doi.org/10.1016/j.coal.2009.07.006
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7058
http://hdl.handle.net/10054/7058
ISSN: 0166-5162
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