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Transmission Electron Microscopic Study of Diagenetic Chlorite in Gulf Coast Argillaceous Sediments

Published online by Cambridge University Press:  02 April 2024

Jung Ho Ahn  and
Donald R. Peacor
Jung Ho Ahn
Affiliation:
Department of Geological Sciences, The University of Michigan, Ann Arbor, Michigan 48109
Donald R. Peacor
Affiliation:
Department of Geological Sciences, The University of Michigan, Ann Arbor, Michigan 48109
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Abstract

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Transmission and analytical electron microscopy have been used to study the diagenesis of the trioctahedral component of phyllosilicates (principally chlorite) in argillaceous core samples (depths of 1750, 2450, and 5500 m) from the Gulf Coast. Chlorite was observed as 100-150-Å thick packets intergrown within mixed-layer illite/smectite in the 2450-m sample and was more abundant and larger in packet thickness in the 5500-m sample. The chlorite is disordered in stacking sequence as characterized by diffuseness of reflections with k ≠ 3n in electron diffraction patterns. Berthierine (7-Å) was locally found to be intercalated within chlorite layers. Chlorite from the 5500-m sample is iron-rich and has an average chemical formula of Fe3.1Mg1.1Al2.7Si2.8O10(OH)8. This chemical composition and textural relations suggest that the chlorite formed within mixed-layer illite/smectite utilizing Fe and Mg released from the smectite during its conversion to illite. The berthierine is nearly identical in chemical composition with the coexisting chlorite although it may have a slightly higher Fe content. The 7-Å berthierine is probably a metastable precursor of the chlorite and may be diagnostic of the diagenetic environment.

Keywords

BerthierineChloriteDiagenesisIllite/smectiteTransmission electron microscopy
Type
1984 George W. Brindley Lecture
Information
Clays and Clay Minerals , Volume 33 , Issue 3 , June 1985 , pp. 228 - 236
Copyright
Copyright © 1985, The Clay Minerals Society

Footnotes

1

Contribution No. 401 from the Mineralogical Laboratory, Department of Geological Sciences, The University of Michigan, Ann Arbor, Michigan 48109.

References

Ahn, J. H., Lee, J. H. and Peacor, D. R., 1983 Mineralogical and textural transition in phyllosilicates during burial diagenesis of Gulf Coast shales Geol. Soc. Amer. Abstr. Progr .Google Scholar
Ahn, J. H. and Peacor, D. R., 1984 The smectite to illite transformation in Gulf Coast argillaceous sediments based on microstructure by TEM/AEM Program with Abstracts, 21st Annual Meeting of The Clay Minerals Society, Baton Rouge, Louisiana, 1984 .Google Scholar
Allard, L. F., Blake, D. F., Newberry, N. G., Bigelow, W. C. and Peacor, D. R., 1980 Microanalysis of geological materials in an analytical electron microscope: elimination of spectral contamination EOS Trans. Amer. Geophys. Union 61 398.Google Scholar
April, R. H., 1981 Trioctahedral smectite and interstratified chlorite/smectite in Jurassic strata of the Connecticut Valley Clays & Clay Minerals 29 31–39.CrossRefGoogle Scholar
Bailey, S. W., Brindley, G. W. and Brown, G., 1980 Structures of layer silicates Crystal Structures of Clay Minerals and Their X-ray Identification London Mineralogical Society 1–123.Google Scholar
Besson, H., Caillère, S. and Henin, M. S., 1966 Comportement d’une montmorillonite en présene d’une solution magnésienne: formation d’une pseudochlorite stable Bull. Groupe Franç. Argiles 18 51–53.CrossRefGoogle Scholar
Black, P. M., 1975 Mineralogy of New Caledonia metamorphic rocks: IV. Sheet silicates from the Ouégoa District Contrib. Mineral. Petrol 49 269–284.CrossRefGoogle Scholar
Blake, D. F., Allard, L. F., Peacor, D. R., Bigelow, W. C. and Bailey, G. W., 1980 “Ultraclean” X-ray spectra in the JEOL JEM-100CX Proc. 38th Ann. Meeting, Electron Microsc. Soc. Amer., San Francisco, California, 1980 Baton Rouge, Louisiana Claitor’s Publishing Division 136–137.Google Scholar
Boles, J. R. and Franks, S. G., 1979 Clay diagenesis in Wilcox sandstones of southwest Texas: implications of smectite diagenesis on sandstone cementation J. Sed. Petrol 49 55–70.Google Scholar
Brindley, G. W., 1982 Chemical compositions of berthierines—a review Clays & Clay Minerals 30 153–155.CrossRefGoogle Scholar
Brindley, G. W. and Gillery, F. H., 1954 A mixed-layer kaolin-chlorite structure Clays and Clay Minerals, Proc. 2nd Natl. Conf., Columbia, Missouri, 1953 327 349–353.Google Scholar
Brown, B. E. and Bailey, S. W., 1962 Chlorite polytypism: I. Regular and semi-random one-layer structures Amer. Mineral 47 819–850.Google Scholar
Caillère, S. and Henin, S., 1949 Experimental formation of chlorites from montmorillonite Mineral. Mag 28 612–620.Google Scholar
Cho, M. and Fawcett, J. J., 1982 Mechanism and kinetics of the reaction, clinochlore = forsterite + cordierite + spinel + vapor AGU East Coast Meeting, EOS 63 465.Google Scholar
Cliff, G. and Lorimer, G. W., 1975 The quantitative analysis of thin specimens J. Microsc 103 203–207.CrossRefGoogle Scholar
Cooper, A. F., 1972 Progressive metamorphism of meta-basic rocks from the Haast schist group of southern New Zealand J. Petrol 13 457–492.CrossRefGoogle Scholar
Dean, R. S., 1983 Authigenic trioctahedral clay minerals coating Clearwater Formation sand grains at Cold Lake, Alberta, Canada Programs and Abstracts 79.Google Scholar
de Dunoyer Segonzac, G., 1970 The transformation of clay minerals during diagenesis and low-grade metamorphism: a review Sedimentology 15 281–346.CrossRefGoogle Scholar
Eberl, D., 1978 Reaction series for dioctahedral smectite Clays & Clay Minerals 26 327–340.CrossRefGoogle Scholar
Fawcett, J. J., Yoder, H. S. Jr., 1966 Phase relationships of chlorites in the system MgO-Al2O3-SiO2-H2O Amer. Mineral 51 353–380.Google Scholar
Foster, M. D., 1962 Interpretation of composition and a classification of the chlorites U.S. Geol. Surv. Prof. Pap 414–A 1–33.Google Scholar
Frey, M., 1970 The step from diagenesis to metamorphism in pelitic rocks during Alpine orogenesis Sedimentology 15 261–279.CrossRefGoogle Scholar
Frey, M., 1978 Progressive low-grade metamorphism of a black shale formation, central Swiss Alps, with special reference to pyrophyllite and margarite bearing assemblage J. Petrol 19 95–135.CrossRefGoogle Scholar
Gillery, F. H., 1959 The X-ray study of synthetic Mg-Al serpentines and chlorites Amer. Mineral 44 143–152.Google Scholar
Hayes, J. B., 1970 Polytypism of chlorite in sedimentary rocks Clays & Clay Minerals 18 285–306.CrossRefGoogle Scholar
Heling, D., 1978 Diagenesis of illite in argillaceous sediments of the Rhinegraben Clay Miner 13 211–220.CrossRefGoogle Scholar
Hower, J., Eslinger, E. V., Hower, M. E. and Perry, E. A., 1976 Mechanism of burial metamorphism of argillaceous sediment: 1. Mineralogical and chemical evidence Geol. Soc. Amer. Bull 87 725–737.2.0.CO;2>CrossRefGoogle Scholar
Iijima, A. and Matsumoto, R., 1982 Berthierine and chamosite in coal measures of Japan Clays & Clay Minerals 30 264–274.CrossRefGoogle Scholar
Iijima, S. and Buseck, P. R., 1978 Experimental study of disordered mica structure by high-resolution electron microscopy Acta Crystallogr A34 709–719.CrossRefGoogle Scholar
Iijima, S. and Zhu, J., 1982 Electron microscopy of a muscovite-biotite interface Amer. Mineral 67 1195–1205.Google Scholar
James, R. S., Turnock, A. C. and Fawcett, J. J., 1976 The stability and phase relations of iron chlorite below 8.5 kb PH2O Contrib. Mineral. Petrol 56 1–25.CrossRefGoogle Scholar
Lee, J. H., 1984 Mineralogical studies of phyllosilicates in a slaty cleavage development in the Martinsburg Formation near Lehigh Gap, Pennsylvania .Google Scholar
Lee, J. H. and Peacor, D. R., 1983 Interlayer transitions in phyllosilicates of Martinsburg shale Nature 303 608–609.CrossRefGoogle Scholar
Maresch, W. V., Massone, H.-J. and Czank, M., 1983 An ordered 1-1 chlorite/biotite mixed-layer mineral as an alteration of chlorite Fortschr. Mineral 61 139–141.Google Scholar
McDowell, S. D. and Elders, W. A., 1980 Authigenic layer silicate minerals in borehole Elmore 1, Salton Sea Geothermal Field, California, U.S.A. Contrib. Mineral. Petrol 74 293–310.CrossRefGoogle Scholar
Millot, G., 1964 Géologie des Argiles Paris Masson et Cie.Google Scholar
Muffler, L. J. P. and White, D. E., 1969 Active metamorphism of upper Cenozoic sediments in the Salton Sea geothermal field and the Salton Trough, southeastern California Geol. Soc. Amer. Bull 80 157–182.CrossRefGoogle Scholar
Nelson, B. W. and Roy, R., 1958 Synthesis of chlorites and their structural and chemical constitution Amer. Mineral 43 707–725.Google Scholar
Olives, B. J., Amouric, M., de Fouquet, C. and Baronnet, A., 1983 Interlayering and interlayer slip in biotite as seen by HRTEM Amer. Mineral 68 754–758.Google Scholar
Perry, E. and Hower, J., 1970 Burial diagenesis in Gulf Coast pelitic sediments Clays & Clay Minerals 18 165–177.CrossRefGoogle Scholar
Schreyer, W., Medenbach, O., Abraham, K., Begert, W. and Müller, W. F., 1982 Kulkeite, a new metamorphic phyl-losilicate mineral: ordered 1:1 chlorite/talc mixed layer Contrib. Mineral. Petrol 80 103–109.CrossRefGoogle Scholar
Slaughter, M., Milne, I. H. and Swineford, A., 1960 The formation of chlorite-like structures from montmorillonite Clays and Clay Minerals New York Pergamon Press 114–125.Google Scholar
Turnock, A. C., 1959 Stability range of iron chlorite Geol. Soc. Amer. Bull 70 1690–1691.Google Scholar
Turnock, A. C., 1960 The stability of iron chlorites Carnegie Inst. Wash. Year Book 59 98–103.Google Scholar
Veblen, D. R., 1983 Microstructures and mixed layering in intergrown wonesite, chlorite, talc, biotite and kaolinite Amer. Mineral 68 566–580.Google Scholar
Veblen, D. R. and Ferry, J. M., 1983 A TEM study of biotite-chlorite reaction and comparison with petrologic observations Amer. Mineral 68 1160–1168.Google Scholar
Velde, B., 1973 Phase equilibria studies in the system MgO-Al2O3-SiO2-H2O: chlorite and associated minerals Mineral. Mag 39 297–312.CrossRefGoogle Scholar
Velde, B., 1977 Clays and Clay Minerals in Natural and Synthetic Systems Amsterdam Elsevier.Google Scholar
Velde, B., Raoult, J. F. and Leikine, M., 1974 Metamorphosed berthierine pellets in Mid-Cretaceous rocks from northeastern Algeria J. Sed. Petrol 44 1275–1280.Google Scholar
Weaver, C. E. and Beck, K. C. (1971) Clay-water diagenesis during burial: how mud becomes gneiss: Geol. Soc. Amer. Spec. Pap. 134, 96 pp.Google Scholar
Yau, L. Y. C., Peacor, D. R. and McDowell, S. D., 1984 TEM/AEM study of chlorite diagenesis in well I.I.D. No. 2 in Saltan Sea geothermal field, California Program with Abstracts 120.Google Scholar
Yoder, H. S., 1952 The MgO-Al2O3-SiO2-H2O system and the related metamorphic facies Amer. J. Sci. Bowen Vol 569–629.Google Scholar