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Diagenetic Illite-Chlorite Assemblages in Arenites. I. Chemical Evolution

Published online by Cambridge University Press:  28 February 2024

J. S. Jahren  and
P. Aagaard
J. S. Jahren
Affiliation:
Department of Geology, University of Oslo, P.O. Box 1047 Blindern, 0316 Oslo, Norway
P. Aagaard
Affiliation:
Department of Geology, University of Oslo, P.O. Box 1047 Blindern, 0316 Oslo, Norway
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Abstract

Authigenic chlorites and illites coexisting in clastic reservoir sandstones have been studied by energy dispersive X-ray spectroscopy (EDS) in the transmission electron microscope (TEM). All 16 samples studied are drill or sidewall cores from sandstones of relatively uniform age situated offshore Norway with burial depths ranging between 2400 m and 5000 m and representing temperatures between 90°C and 180°C. Chlorites and illites with authigenic equilibrium type texture and morphology were analyzed by EDS. Tetrahedral Al and octahedral Fe+Mg in chlorite increases with burial at the expense of Si and vacant octahedral positions in the chlorite structure. Illites show a clear increase in K. These factors indicate that a continuous chemical modification of these minerals takes place in the diagenetic interval studied through continuous dissolution and precipitation reactions.

Keywords

ATEMChloriteEDSIllite
Type
Research Article
Information
Clays and Clay Minerals , Volume 40 , Issue 5 , October 1992 , pp. 540 - 546
Copyright
Copyright © 1992, The Clay Minerals Society

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References

Aagaard, P., Jahren, J. S. and Egeberg, P. K., 1990 Thermodynamic stability of clay minerals with relevance to the diagenetic regime 17 1 126.Google Scholar
Bailey, S. W. and Brown, B. E., 1962 Chlorite polytypism: I. Regular and semi-random one-layer structures Amer. Mineral 47 819 – 850.Google Scholar
Baronnet, A., 1982 Ostwald ripening: The case of calcite and mica Estudios Geologie 38 185 – 198.Google Scholar
Bjørlykke, K., Mo, A. and Palm, E., 1988 Modelling of thermal convection in sedimentary basins and its relevance to diagenetic reactions Marine and Petr. Geol. 5 338 – 350 10.1016/0264-8172(88)90027-X.CrossRefGoogle Scholar
Bjørlykke, K., Aagaard, P., Dypvik, H., Hastings, D. S., Harper, A. S., et al. , Spencer, A. M., 1986 et al. , Diagenesis and reservoir properties of Jurassic sandstones from the Haltenbanken area, Offshore mid Norway Habitat of Hydrocarbons on the Norwegian Continental Shelf London Graham and Trotman 275 – 286.Google Scholar
Cathelineau, M., 1988 Cation site occupancy in chlorites and illites as a function of temperature Clay Miner. 23 471 – 485 10.1180/claymin.1988.023.4.13.CrossRefGoogle Scholar
Cathelineau, M. and Neiva, D., 1985 A chlorite solid solution geothermometer. The Los Azufres geothermal system (Mexico) Contrib. Mineral. Petr. 91 235 – 244 10.1007/BF00413350.CrossRefGoogle Scholar
Chai, B. H. T., Hoffmann, A. W. and Giletti, B. J., 1974 Mass transfer of calcite during hydrothermal crystallization Geochemical Transport and Kinetics Washington, D. C. Carnegie Institution of 205 – 218.Google Scholar
Curtis, C. D., Hughes, C. R., Whiteman, J. A. and Whittle, C. K., 1985 Compositional variations within some sedimentary chlorites and some comments on their origin Mineral. Mag. 49 375 – 386 10.1180/minmag.1985.049.352.08.CrossRefGoogle Scholar
Curtis, C. D., Ireland, B. J., Whiteman, J. A., Mulvaney, R. and Whittle, C. K., 1984 Authigenic chlorites: Problems with chemical analysis and structural formula calculation Clay Miner. 19 471 – 481 10.1180/claymin.1984.019.3.14.CrossRefGoogle Scholar
Eberl, D. D. and Srodon, J., 1988 Ostwald ripening and interparticle-diffraction effects for illite crystals Amer Mineral. 73 1335 – 1345.Google Scholar
Eberl, D. D., Srodon, J., Kralik, M., Taylor, B. E. and Peterman, Z. E., 1990 Ostwald ripening of clays and meta-morphic minerals Science 248 474 – 477 10.1126/science.248.4954.474.CrossRefGoogle Scholar
Ehrenberg, S. N., 1991 Kaolinized, potassium leached zones at the contacts of the Garn Formation, Haltenbanken, mid-Norwegian continental shelf Marine and Petr. Geol. 8 250 – 269 10.1016/0264-8172(91)90080-K.CrossRefGoogle Scholar
Ehrenberg, S. N. and Nadeau, P. H., 1989 Formation of diagenetic illite in sandstones of the Garn Formation, Haltenbanken, mid-Norwegian continental shelf Clay Miner. 24 233 – 253 10.1180/claymin.1989.024.2.09.CrossRefGoogle Scholar
Foster, M. D., 1962 Interpretation of the composition and a classification of the chlorites U.S. Geol. Survey Prof. Paper 1 – 33.CrossRefGoogle Scholar
Hayes, J. B., 1970 Polytypism of chlorite in sedimentary rocks Clays & Clay Minerals 18 285 – 306 10.1346/CCMN.1970.0180507.CrossRefGoogle Scholar
Hillier, S. and Velde, B., 1991 Octahedral occupancy and the chemical composition of diagenetic (low-temperature) chlorites Clay Miner. 26 149 – 168 10.1180/claymin.1991.026.2.01.CrossRefGoogle Scholar
Hutcheon, I. E., Abercrombie, H. J. and Miles, D. L., 1989 The role of silicate hydrolysis in the origin of CO2 in sedimentary basins Water-Rock Interaction Rotterdam Balkema 321 – 324.Google Scholar
Inoue, A., Velde, B., Meunier, A. and Touchard, G., 1988 Mechanism of illite formation during smectite-to-illite conversion in a hydrothermal system Amer. Mineral. 73 1325 – 1334.Google Scholar
Jahren, J. S., 1991 Evidence of Ostwald ripening related recrystallization of chlorites from reservoir rocks offshore Norway Clay Miner. 26 169 – 178 10.1180/claymin.1991.026.2.02.CrossRefGoogle Scholar
Jahren, J. S. and Aagaard, P., 1989 Compositional variations in diagenetic chlorites and illites, and relationships with formation-water chemistry Clay Miner. 24 157 – 170 10.1180/claymin.1989.024.2.04.CrossRefGoogle Scholar
Nadeau, P. H., 1985 The physical dimensions of fundamental clay particles Clay Miner. 20 499 – 514 10.1180/claymin.1985.020.4.06.CrossRefGoogle Scholar
Srodon, J. and Eberl, D. D., 1984 Illite Micas 13 495 – 544 10.1515/9781501508820-016.CrossRefGoogle Scholar
Velde, B., 1985 Clay minerals Dev. in Sed. Amsterdam Elsevier.Google Scholar
Velde, B. and Medhioub, M., 1988 Approach to chemical equilibrium in diagenetic chlorites Contrib Mineral Petr. 98 122 – 127 10.1007/BF00371916.CrossRefGoogle Scholar