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Molecular fossils in Cretaceous condensate from western India

DSpace at IIT Bombay

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Title Molecular fossils in Cretaceous condensate from western India
 
Creator BHATTACHARYA, S
DUTTA, S
DUTTA, R
 
Subject Cretaceous
condensate
Jaisalmer basin
biomarkers
conifer source
ORGANIC-MATTER
GIPPSLAND-BASIN
CRUDE OILS
BIOMARKERS
HYDROCARBONS
AUSTRALIA
SEDIMENTS
GERMANY
ENVIRONMENT
GENERATION
 
Description The present study reports the biomarker distribution of condensate belonging to the early Cretaceous time frame using gas chromatography-mass spectrometry (GC MS). The early Cretaceous palaeoenvironment was inscribed into these molecular fossils which reflected the source and conditions of deposition of the condensate. The saturate fraction of the condensate is characterized by normal alkanes ranging from n-C-9 to n-C-29 (CPI-1.13), cycloalkanes and C-14 and C-15 sesquiterpanes. The aromatic fraction comprises of naphthalene, phenanthrene, their methylated derivatives and cyclohexylbenzenes. Isohexylalkylnaphthalenes, a product of rearrangement process of terpenoids, is detected in the condensate. Several aromatic sesquiterpenoids and diterpenoids have been recorded. Dihydro-ar-curcumene, cadalene and ionene form the assemblage of sesquiterpenoids which are indicative of higher plant input. Aromatic diterpenoid fraction comprises of simonellite and retene. These compounds are also indicative of higher plants, particularly conifer source which had been a predominant flora during the Cretaceous time.
 
Publisher INDIAN ACAD SCIENCES
 
Date 2014-12-28T09:09:47Z
2014-12-28T09:09:47Z
2014
 
Type Article
 
Identifier JOURNAL OF EARTH SYSTEM SCIENCE, 123(5)923-934
0253-4126
0973-774X
http://dspace.library.iitb.ac.in/jspui/handle/100/16251
 
Language English