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The Mineralogy of Glauconite

Published online by Cambridge University Press:  01 July 2024

Graham R. Thompson  and
John Hower
Graham R. Thompson
Affiliation:
Department of Geology, University of Montana, Missoula 59801. U.S.A.
John Hower
Affiliation:
Department of Geology, Case Western Reserve University, Cleveland, Ohio 44106, U.S.A.
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Abstract

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The mineral in monomineralic glauconite pellets is an iron-rich mixed-layer illite-smectite (here called glauconite), often composed almost entirely of illite layers. The nature of the interlayering is closely analagous to that of aluminous illite-smectite and varies with the proportions of the layer types: >30 per cent smectite, randomly interstratified; 15–30 per cent smectite, allevardite-like ordering; < 15 per cent smectite, ‘IMII’ ordering.

Glauconite is analagous to aluminous illite-smectite chemically as well as structurally. A good correlation has been found between the number of potassium atoms per O10(OH)2 in structural formulas calculated from the chemical analyses and the proportion of illite layers as determined by X-ray powder diffraction methods. This relationship indicates a remarkably systematic increase in the potassium content of the illite layers with an increasing proportion of illite layers. This feature and the existence of ordered interlayering at high proportions of illite layers can be explained by crystal-chemical effects of illite layers on neighboring smectite layers. Glauconite differs from aluminous illite-smectite in that glauconite contains significantly less potassium per illite layer than does aluminous illite-smectite with the same proportion of illite layers except near the pure illite composition. The strength with which the interlayer potassium is held and the ease of conversion of smectite to illite layers in glauconite may be attributed to its 1M structure and, perhaps, to its high octahedral iron content, which lead to stronger bonding of potassium by allowing a higher tilt angle of the O-H axis of hydroxyls adjacent to the potassium ion.

The apparent octahedral cation occupancy in excess of two-thirds of the octahedral positions in many glauconites appears largely attributable to the presence of significant amounts of interlayer hydroxy-iron, aluminum and magnesium complexes in the smectite layers.

Type
Research Article
Information
Clays and Clay Minerals , Volume 23 , Issue 4 , August 1975 , pp. 289 - 300
Copyright
Copyright © 1975, The Clay Minerals Society

References

Barackman, M. A., (1964) A study of the mineral glauconite in Apalachicola Bay, Florida Florida Thesis, Florida State University, Tallahassee 44.Google Scholar
Bassett, W. A., (1960) Role of hydroxyl orientation in mica alteration Bull. Geol. Soc. Am. 71 449–455.10.1130/0016-7606(1960)71[449:ROHOIM]2.0.CO;2CrossRefGoogle Scholar
Bell, D. H. and Goodell, H. G., (1967) A comparative study of glauconite and the associated clay fraction in modern marine sediments Sedimentology 9 169–202.10.1111/j.1365-3091.1967.tb02038.xCrossRefGoogle Scholar
Bentor, Y. K. and Kastner, M., (1965) Notes on the mineralogy and origin of glauconite J. Sediment. Petrol. 35 155–166.Google Scholar
Brindley, G. W. and Youell, R. F., (1951) A chemical determination of ‘tetrahedral’ and ‘octahedral’ aluminum ions in a silicate Acta Cryst. 4 495–496.CrossRefGoogle Scholar
Brown, G., (1961) The X-ray Identification and Crystal Structures of Clay Minerals. London Mineralogical Society (Clay Minerals Group).Google Scholar
Burst, J. F., (1958) ‘Glauconite’ pellets: Their mineral nature and applications for stratigraphic interpretations Bull. Am. Ass. Petrol. Geologists 42 310–327.Google Scholar
Burst, J. F., (1958) Mineral heterogeneity in ‘glauconite’ pellets. Am. Miner. 43 481–497.Google Scholar
Cloos, P. Gastuche, M. C. and Groegart, M., (1961) Cinétique de la destruction de la glauconite par l'acide chlor-hydrique étude preliminaire Int. Geol. Cong. 2lst Rept. Session 35–50.Google Scholar
Ehlmann, A. J. Hulings, N. C. and Glover, E. D., (1963) Stages of glauconite formation in modern foraminiferal sediments J. Sediment. Petrol. 33 87–96.Google Scholar
Foster, M. D., (1951) Geochemical studies of clay minerals—I. The importance of exchangeable magnesium and cation exchange capacity in the study of montmorilloni-tic clays Am. Miner. 36 717–730.Google Scholar
Giese, R. F., (1971) Hydroxyl orientation in muscovite as indicated by electrostatic energy calculations Science 172 263–264.CrossRefGoogle ScholarPubMed
Giese, R. F., (1973) Hydroxyl orientations—dioctahedral micas. 22nd Ann. Clay Minerals Conf. Canada Banff, Alberta 7–11.Google Scholar
Granquist, W. T. and Sumner, G. G., (1957) Acid dissolution of a Texas bentonite Clays and Clay Minerals 6 292–301.Google Scholar
Gruner, J. W., (1935) The structural relations of glauconite and mica Am. Miner. 20 699–714.Google Scholar
Grim, R. E. Bradley, W. F. Brown, G. and G. W, B., (1951) The mica clay minerals X-ray identification and crystal structures of clay minerals 138–172.Google Scholar
Gupta, G. C. and Malik, W. U., (1969) Chloritization of montmorillonite by its coprecipitation with magnesium hydroxide Clays and Clay Minerals 17 331–338.CrossRefGoogle Scholar
Gupta, G. C. and Malik, W. U., (1969) Fixation of hyd-roxy-aluminum by montmorillonite Am. Miner. 54 1625–1634.Google Scholar
Hendricks, S. B. and Ross, C. S., (1941) Chemical composition and genesis of glauconite and celadonite Am. Miner. 26 683–708.Google Scholar
Hower, J., (1961) Some factors concerning the nature and origin of glauconite. Am. Miner. 46 313–334.Google Scholar
Hower, J. Schmittroth, L. A. Perry, E. C. and Mowatt, T. C., (1965) X-ray spectrographic major constituent analysis in undiluted silicate rocks and minerals (abs.) Geol. Soc. Am. Spec. Paper 82 96–97.Google Scholar
Hower, J. and Mowatt, T. C., (1966) The mineralogy of illites and mixed-layer illite-montmorillonite Am. Miner. 51 825–854.Google Scholar
Huang, W. H. and Keller, W. D., (1972) Geochemical mechanics for one dissolution, transport and deposition of aluminum in the zone of weathering Clays and Clay Minerals 20 69–74.CrossRefGoogle Scholar
Hurley, P. M. Cormier, R. F. Hower, J. Fairbairn, H. W. and Pinson, W. H. Jr., (1960) Reliability of glauconite for age measurement by K-Ar and Rb-Sr methods Bull. Am. Ass. Petrol. Geologists 11 1793–1808.Google Scholar
Kinter, E. B. and Diamond, S., (1956) A new method for preparation and treatment of oriented-aggregate specimens of soil clays for X-ray diffraction analysis Soil Science 81 111–120.CrossRefGoogle Scholar
MacKenzie, R. D., (1970) Differential Thermal Analysis New York Academic Press.Google Scholar
McRae, S. G., (1972) Glauconite Earth-Sci. Rev. 8 397–440.CrossRefGoogle Scholar
Manghnani, M. H. and Hower, J., (1964) Glauconites: Cation exchange capacities and i.r. spectra—II. The cation exchange capacity of glauconite Am. Miner. 49 586–598.Google Scholar
Marshall, C. E., (1935) Layer lattices Z. Kristallog. 91 443–449.Google Scholar
Marshall, C. E., (1964) The Physical Chemistry and Mineralogy of Soils New York Wiley.Google Scholar
Mering, J. and Glaesser, R., (1954) Sur le rôle de la valence des cations eschangeables dans le montmorillonite Bull. Soc. France. Miner. 77 519–530.Google Scholar
Osthaus, B., (1954) Chemical determination of tetrahedral ions in nontronite and montmorillonite Clays and Clay Minerals 2 404–417.Google Scholar
Osthaus, B., (1965) Kinetic studies on montmorillonites and nontronite by the acid dissolution techniques Clays and Clay Minerals 4 301–321.Google Scholar
Perry, E. A. and Hower, J., (1970) Burial diagenesis in Gulf Coast, pelitic sediments Clays and Clay Minerals 18 165–177.CrossRefGoogle Scholar
Pratt, W. L., (1962) The origin and distribution of glauconite from the sea floor off southern California Los Angeles, Calif. Thesis, University of Southern California.Google Scholar
Reichen, L. E. and Fahey, J. J., (1962) An improved method for the determination of FeO in rocks and minerals including garnet U.S. Geol. Surv. Bull. 1144-B 1–5.Google Scholar
Reynolds, R. C. and Hower, J., (1970) The nature of inter-layering in mixed-layer illite-montmorillonites Clays and Clay Minerals 18 25–36.CrossRefGoogle Scholar
Rich, C. I., (1968) Hydroxy interlayers in expansible layer silicates Clays and Clay Minerals 16 15–30.CrossRefGoogle Scholar
Ross, G. S., (1969) Acid dissolution of chlorites: Release of magnesium, iron and aluminum and mode of acid attack Clays and Clay Minerals 17 347–354.CrossRefGoogle Scholar
Sawhney, B. L., (1967) Interstratification in vermiculite Clays and Clay Minerals 15 75–84.CrossRefGoogle Scholar
Schneider, H., (1927) A study of glauconite J. Geol. 35 289–310.CrossRefGoogle Scholar
Schultz, L. G., (1971) Lithium and potassium absorption, dehydroxylation temperature and structural water content of aluminous smectites Clays and Clay Minerals 17 115–150.CrossRefGoogle Scholar
Takahashi, J. I. and Yagi, T., (1929) Peculiar mud grains and their relation to the origin of glauconite Econ. Geol. 24 838–854.CrossRefGoogle Scholar
Thompson, G. R. and Hower, J., (1973) An explanation for low radiometric ages from glauconite Geoch. et Cos-moch. Acta 37 1473–1492.CrossRefGoogle Scholar
Triplehorn, D. M., (1966) Morphology, internal structure and origin of glauconite pellets Sedimentology 6 247–266.CrossRefGoogle Scholar
Tsuboi, M., (1950) On the positions of the hydrogen atoms in the crystal structure of muscovite as revealed by infrared absorption study Bull. Chem. Soc. Japan 23 83–88.CrossRefGoogle Scholar
Van der Marel, H. W., (1964) Identification of chlorite and chlorite-related minerals in sediments Beit. z. Mineral. Petrograph. 9 462–480.Google Scholar
Vedder, W. and McDonald, R. S., (1963) Vibrations of the OH ions in muscovite J. Chem. Phys. 38 1583.CrossRefGoogle Scholar
Warshaw, C. M., (1957) The mineralogy of glauconite PA Thesis, Pennsylvania State Univ., University Park 155.Google Scholar
Weaver, C. E., (1965) Potassium content of illite Science 147 603–605.CrossRefGoogle ScholarPubMed
Yoder, H. S., (1959) Experimental studies on micas, a synthesis Clays and Clay Minerals 6 42–60.Google Scholar