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Black sandstones in the Midland Valley of Scotland: thermally metamorphosed hydrocarbon reservoirs?

Published online by Cambridge University Press:  03 November 2011

Simon C. George
Simon C. George
Affiliation:
Simon C. George, Newcastle Research Group in Fossil Fuels and Environmental Geochemistry, Drummond Building,The University, Newcastle upon Tyne, NE1 7RU, England, UK
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Abstract

Carboniferous sandstones from within the thermal aureoles of igneous intrusions in the Midland Valley of Scotland sometimes have a strong, black colour and are termed ‘black sandstones’. Tait (1926) concluded that the black sandstones are the products of the thermal metamorphism of petroliferous sandstones, a theory which is discussed here in the light of modern petrological and geochemical techniques.

The black colour of the sandstones is due to an amorphous, opaque bitumen which usually coats illitic clays, fills porosity and was mostly emplaced at a fairly late diagenetic stage. This solid bitumen has a low reflectance (c. 0·15% R0), no fluorescence under blue-light excitation, is insoluble in organic solvents, is isotopically heavy and has a very low H/C atomic ratio. These data, together with the field relationships of the black sandstones and igneous intrusions, suggest that the bitumen was formed by the thermal alteration of hydrocarbons, as described by Tait (1926), rather than by other possible mechanisms such as the deasphalting of an oil, or the generation of hydrocarbons from organic-rich rocks heated by igneous intrusions, followed by fractionation during migration. This conclusion suggests that by the time of emplacement of the quartz-dolerite intrusions, and some of the alkali-dolerite sills, there had been widespread generation and migration of hydrocarbons which possibly could have been preserved to the present day where not thermally altered.

Keywords

Carboniferousbitumenssandstone diagenesisthermal alteration
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 84 , Issue 1 , 1993 , pp. 61 - 72
Copyright
Copyright © Royal Society of Edinburgh 1993

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References

Abraham, H. 1945. Asphalts and allied substances. Van Nostrand-Rheinhold.Google Scholar
Al-Rubbaii, M. 1986. Sedimentology and petrology of the Carboniferous rocks of St Monans, Fife, Scotland. University of St Andrews PhD thesis (unpublished).Google Scholar
Beare, H. 1982. Building-stones of Great Britain—their crushing strength and other properties. MINUTES PROC INST CIVIL ENGINEERS 107, 341–69.CrossRefGoogle Scholar
Cadell, H. M. 1919. Oil possibilities in Scotland. TRANS INST MIN ENG 58, 44–70.Google Scholar
Cater, J. M. L. 1987. Sedimentology of part of the Lower Oil Shale Group (Dinantian) sequence at Granton, Edinburgh, including the Granton “shrimp-bed”. TRANS R SOC EDINBURGH EARTH SCI 78, 29–40.CrossRefGoogle Scholar
Conacher, H. R. J. 1923. Some occurrences of natural mineral oil in the Scottish shale fields. TRANS EDINBURGH GEOL SOC 11, 319–26.CrossRefGoogle Scholar
Conacher, H. R. J. 1932. Native hydrocarbons associated with the oil shales of the Lothians. TRANS EDINBURGH GEOL SOC 13, 89–97.CrossRefGoogle Scholar
Cornford, C. 1986. Source rocks and hydrocarbons of the North Sea. In Glennie, K. W. (ed.) Introduction to the petroleum geology of the North Sea, 2nd edn, 197–236. Oxford: Blackwell.Google Scholar
Curiale, J. A. 1986. Origin of solid bitumens, with emphasis on biological marker results. ORG GEOCHEM 10, 559–80.CrossRefGoogle Scholar
Deroo, G., Tissot, B., McCrossan, R. G. & Der, F. 1974. Geochemistry of the heavy oils of Alberta. In: Oils sands: fuel of the future, memoir 3, CAN SOC PET GEOL, pp. 148–67.Google Scholar
De Souza, H. A. F. 1979. The geochronology of Scottish Carboniferous volcanism. University of Edinburgh PhD thesis (unpublished).Google Scholar
Dickson, J. A. D. 1965. A modified staining technique for carbonates in thin section. NATURE 205, 587.CrossRefGoogle Scholar
Dinham, C. H. & Haldane, D. 1932. The economic geology of the Stirling and Clackmannan Coalfield. MEM GEOL SURV SCOT.Google Scholar
Dixon, S. A., Summers, D. M. & Surdam, R. C. 1989. Diagenesis and preservation of porosity in Norphlet Formation (Upper Jurassic), Southern Alabama. BULL AM ASSOC PETROL GEOL 73, 707–28.Google Scholar
Fitch, F. J., Miller, J. A. & Williams, S. C. 1970. Isotopic ages of British Carboniferous rocks. In: Compte Rendu Sixième Congrès International de Stratigraphie et de Géologie du Carbonifère, Sheffield, 1967, 771–89.Google Scholar
Forsyth, I. H. & Rundle, C. C. 1978. The age of the volcanic and hypabyssal rocks of East Fife. BULL GEOL SURV GREAT BRITAIN 60, 23–9.Google Scholar
George, S. C. 1990. The influence of igneous activity on the generation and accumulation of petroleum in the central area of the Midland Valley of Scotland. University of Newcastle upon Tyne PhD thesis (unpublished).Google Scholar
George, S. C. 1992. Effect of igneous intrusion on the organic geochemistry of a siltstone and an oil shale horizon in the Midland Valley of Scotland. ORG GEOCHEM 18, 705–23.CrossRefGoogle Scholar
George, S. C., Llorca, S. M. & Hamilton, P. J. 1993. An integrated analytical approach for determining the origin of solid bitumens in the McArthur Basin, northern Australia. ORG GEOCHEM, in press.Google Scholar
Gibson, W., Flett, J. S., Anderson, E. M., Lee, G. W. & Macgregor, M. 1922. Cannel coal, lignite and mineral oil in Scotland. Special reports of the mineral resources of Great Britain. MEM GEOL SURV SCOT 24.Google Scholar
Gifford, H. P. W. 1923. The recent research for oil in Great Britain. TRANS INST MIN ENG 65, 221–50.Google Scholar
Glennie, K. W. 1986. The structural framework and the pre-Permian history of the North Sea area. In Glennie, K. W. (ed.) Introduction to the petroleum geology of the North Sea, 2nd edn, 25–62. Oxford: Blackwell.Google Scholar
Goodarzi, F. & Williams, P. F. V. 1986. Composition of natural bitumens and asphalts from Iran. 2. Bitumens from the Posteh Ghear valley, south-west Iran. FUEL 65, 17–27.CrossRefGoogle Scholar
Greensmith, J. T. 1961. The petrology of the Oil-Shale Group sandstones of West Lothian and Southern Fifeshire. PROC GEOL ASSOC 72, 49–71.CrossRefGoogle Scholar
Greensmith, J. T. 1965. Calciferous Sandstone Series sedimentation at the eastern end of the Midland Valley of Scotland. J SEDIMENT PETROL 35, 223–42.Google Scholar
Hallett, D., Durant, G. P. & Farrow, G. E. 1985. Oil exploration and production in Scotland. SCOTT J GEOL 21, 547–70.CrossRefGoogle Scholar
Hess, J. C. & Lippolt, H. J. 1986. 40Ar/39Ar ages of tonstein and tuff sanidines: new calibration points for the improvement of the Upper Carboniferous time scale. CHEM GEOL (ISOT GEOSCI SECT) 59, 143–54.CrossRefGoogle Scholar
Hvoslef, S., Larter, S. R. & Leythaeuser, D. 1988. Aspects of generation and migration of hydrocarbons from coal-bearing strata of the Hitra formation, Haltenbanken area, offshore Norway. ORG GEOCHEM 13, 525–36.CrossRefGoogle Scholar
Jacob, H. 1967. Petrologie von asphaltiten und asphaltischen pyrobitumina. ERDÖL KOHLE ERDGAS PETROCHEM 20, 393–400.Google Scholar
Khorasani, G. K., Murchison, D. G. & Raymond, A. C. 1990. Molecular disordering in natural cokes approaching dyke and sill contacts. FUEL 69, 1037–46.CrossRefGoogle Scholar
King, L. H., Goodspeed, F. E. & Montgomery, D. S. 1963. A study of sedimented organic matter and its natural derivatives. CANADA DEPT MINES AND TECH SURVEYS, OTTAWA, MINES BRANCH RES REPT R114.Google Scholar
Kirkland, B. L. 1988. Petrographic and graphic analysis of shelf-edge porosity in Lower Cretaceous Sligo Formation, South Texas. BULL AM ASSOC PETROL GEOL 72, 1114–5.Google Scholar
Leeder, M. R. 1988. Recent developments in Carboniferous geology: a critical review with implications for the British Isles and NW Europe. PROC GEOL ASSOC 99, 73–100.CrossRefGoogle Scholar
Levandowski, D. W., Kaley, M. E., Silverman, S. R. & Smalley, R. G. 1973. Cementation in Lyons Sandstone and its role in oil accumulation, Denver Basin, Colorado. BULL AM ASSOC PETROL GEOL 57, 2217–44.Google Scholar
Levine, J. R., Samson, I. M. & Hesse, R. 1991. Occurrence of fracture-hosted impsonite and petroleum fluid inclusions, Quebec City region, Canada. BULL AM ASSOC PETROL GEOL 75, 139–55.Google Scholar
MacAuliffe, C. D. 1979. Oil and gas migration-chemical and physical constraints. BULL AM ASSOC PETROL GEOL 63, 761–81.Google Scholar
Macgregor, M. & Anderson, E. M. 1923. The economic geology of the Central Coalfiled of Scotland, Area VI, Bathgate, Wilsontown and Shotts. MEM GEOL SURV SCOT.Google Scholar
Muir, R. O. 1963. Petrography and provenance of the Millstone Grit of Central Scotland. TRANS EDINBURGH GEOL SOC 19, 439–85.CrossRefGoogle Scholar
Murchison, D. G. & Raymond, A. C. 1989. Igneous activity and organic maturation in the Midland Valley of Scotland. INT J COAL GEOL 14, 47–82.CrossRefGoogle Scholar
Parker, C. A. 1974. Geopressure and secondary porosity in the deep Jurassic of Mississippi. TRANS GULF COAST ASSOC GEOL SOC 24, 69–80.Google Scholar
Parnell, J. 1984. Hydrocarbon minerals in the Midland Valley of Scotland, with particular reference to the Oil Shale Group. PROC GEOL ASSOC 95, 275–85.CrossRefGoogle Scholar
Raymond, A. C. & Murchison, D. G. 1988. Development of organic maturation in the thermal aureoles of sills and its relation to sediment compaction. FUEL 67, 1599–608.CrossRefGoogle Scholar
Rogers, M. A., McAlary, J. D. & Bailey, N. J. L. 1974. Significance of reservoir bitumens to thermal-maturation studies, West Canada Basin. BULL AM ASSOC PETROL GEOL 58, 1806–24.Google Scholar
Sassen, R. 1988. Geochemical and carbon isotopic studies of crude oil destruction, bitumen precipitation and sulfate reduction in the deep Smackover Formation. ORG GEOCHEM 12, 351–61.CrossRefGoogle Scholar
Scott, J. & Colter, V. S. 1987. Geological aspects of current onshore Great Britain exploration plays. In Brooks, J. et al. et al. (eds) Petroleum geology of North West Europe, 95–107. London: Graham and Trotman.Google Scholar
Searl, A. 1991. Early Dinantian dolomites from East Fife: hydrothermal overprinting of early diagenetic fabrics? J GEOL SOC LOND 148, 737–47.CrossRefGoogle Scholar
Simoneit, B. R. T., Brenner, S., Peters, K. E. & Kaplan, I. R. 1981. Thermal alteration of Cretaceous black shale by diabase intrusions in the Eastern Atlantic—II. Effects on bitumen and kerogen. GEOCHIM COSMOCHIM ACTA 45, 1581–602.CrossRefGoogle Scholar
Simoneit, B. R. T., Philp, R. P., Jenden, P. D. & Galimov, E. M. 1984. Organic geochemistry of Deep Sea Drilling Project sediments from the Gulf of California—hydrothermal effects on unconsolidated diatom ooze. ORG GEOCHEM 7, 173–205.CrossRefGoogle Scholar
Sofer, Z. 1980. Preparation of carbon dioxide for stable carbon isotope analysis of petroleum fractions. ANAL CHEM 52, 1389–91.CrossRefGoogle Scholar
Steuart, D. R. 1911. The occurrence of petroleum at Broxburn. TRANS EDINBURGH GEOL SOC 10, 38–9.CrossRefGoogle Scholar
Tait, D. 1926. On the occurrence of petroliferous sandstones in the Carboniferous rocks of Scotland and their relation to certain black sandstones. TRANS EDINBURGH GEOL SOC 12, 90–104.CrossRefGoogle Scholar
Thompson-Rizer, C. L. 1987. Some optical characteristics of solid bitumen in visual kerogen preparations. ORG GEOCHEM 11, 385–92.CrossRefGoogle Scholar
Thompson, C. L. & Dembicki, H. 1986. Optical characteristics of amorphous kerogens and the hydrocarbon-generating potential of source rocks. INT J COAL GEOL 6, 229–49.CrossRefGoogle Scholar
Wilson, M. D. & Pittman, E. D. 1977. Authigenic clays in sandstones: recognition and influence on reservoir properties and paleoenvironmental analysis. J SEDIMENT PETROL 47, 3–31.Google Scholar
Yeh, H. W. & Epstein, S. 1981. Hydrogen and carbon isotopes of petroleum and related organic matter. GEOCHIM COSMOCHIM ACTA 45, 753–62.CrossRefGoogle Scholar