Geomorphological and glaciological studies, Eastern Breidamerkurjokull, Iceland
The thesis is composed of two parts. A full index to the contents of each part is given at the beginning of the thesis, together with an index for all the figures and tables. PART I is concerned with the thermal and catalytic alteration of organic matter. The Introduction reviews the origin of hydro...
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| Format: | Thesis |
| Language: | English |
| Published: |
1968
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| Online Access: | http://theses.gla.ac.uk/83110/ https://theses.gla.ac.uk/83110/1/10868098.pdf https://eleanor.lib.gla.ac.uk/record=b1632277 |
| Summary: | The thesis is composed of two parts. A full index to the contents of each part is given at the beginning of the thesis, together with an index for all the figures and tables. PART I is concerned with the thermal and catalytic alteration of organic matter. The Introduction reviews the origin of hydro-carbons in sediments and discusses the possible precursors for these compounds. The probable biogenic or abiogenic routes leading to the formation of hydrocarbons in Nature are also discussed. Section 1 is concerned with the thermal and catalytic alteration of an n-alkane (n-octacosane). The products of alteration are examined by thin layer chromatography (t.l.c.) and capillary column gas-liquid chromatography (g.l.c.). The results are discussed and appear to indicate that thermal and catalytic alteration of alkanes and other straight chain lipid materials could be a contributory process to the generation of petroleum. Section 2 is concerned with the thermal alteration of an Eocene sediment (Green River shale, ca. 60 x 10e6 years old) con- ducted at different temperatures and for varying periods of time. The hydrocarbon content of the shale is examined IA each experiment and compared to the corresponding fraction isolated from a sample of untreated sediment. The results are discussed and show that a slow thermal alteration of the organic matter contained in a sediment may be one of the causes of the changes in distribution patterns for the hydrocarbons found for sediments of different ages. PART II is concerned with the isolation and characterisation of cycloalkanes from an Eocene sediment (the Green River shale, ca. 60 x 106 years old). The Introduction briefly discusses the pathways of biosynthesis of triterpenes. It goes on to examine the relationships between the triterpenoid and steroid distributions found in Nature and compares these with the cycloalkane compounds isolated from sediments. A preliminary chemotaxonomic survey for steroids and triterpenoids in plants is attempted. Section 1 discusses the use of ... |
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