Skip to main content Accessibility help
×
Home

High-angle annular dark field scanning transmission electron microscopic (HAADF-STEM) study of Fe-rich 7 Å–14 Å interstratified minerals from a hydrothermal deposit

  • Sayako Inoué (a1) and Toshihiro Kogure (a1)

Abstract

The distribution of octahedral cations in the two component layers of a 7 Å–14 Å interstratified mineral with a bulk chemical composition (Fe4.12 2+Mg0.07Mn0.01Al1.690.11)(Si2.56Al1.44) O10(OH)8 was investigated using high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) in combination with the image simulations. In the 14 Å component layers, comparison between the observed and simulated images revealed that the M4 sites of the interlayer sheets were occupied preferentially by Al together with a small amount of Fe; the other M1, M2 and M3 sites were occupied by dominant Fe and residual Al in equal proportions. Two types of octahedral sheets with disordered and ordered cation distributions were recognized in the 7 Å component layers. The two types of sheets were similar to the octahedral sheet of the 2:1 layer and the interlayer sheet in the 14 Å layer above, respectively. Irregular vertical stacking and lateral contact of the different component layers in structure and chemistry characterized the interstratification, which may be caused by rapid precipitation and accretion of the component layers in hydrothermal environments.

Copyright

Corresponding author

Footnotes

Hide All

This work was originally presented during the session ‘The many faces of chlorite’, part of the Euroclay 2015 conference held in July 2015 in Edinburgh, UK.

Footnotes

References

Hide All
Ahn, J.H. & Peacor, D.R. (1985) Transmission electron microscopic study of diagenetic chlorite in Gulf Coast argillaceous sediments. Clays and Clay Minerals, 33, 228236.
Bailey, S.W. (1969) Polytypism of trioctahedral 1:1 layer silicates. Clays and Clay Minerals, 17, 355371.
Bailey, S.W. (1988a) Chlorites: structures and crystal chemistry. pp. 347-403 in: Hydrous Phyllosilicates (Exclusive of Micas) (S.W. Bailey, editor). Vol. 19, Reviews in Mineralogy, Mineralogical Society of America, Washington, D.C.
Bailey, S.W. (1988b) Structures and compositions of other trioctahedral 1:1 phyllosilicates. Pp. 169188 in: Hydrous Phyllosilicates (Exclusive of Micas) (S.W. Bailey, editor). Vol. 19, Reviews in Mineralogy, Mineralogical Society of America, Washington, D.C.
Bailey, S.W. & Brown, G. (1962) Chlorite polytypism: I. regular and semirandom one-layer structures. American Mineralogist, 47, 819850.
Baronnet, A. (1997) Equilibrium and kinetic processes for polytypes and polysome generation. Pp. 119152 in: Modular Aspects of Minerals (S. Merlino, editor). Vol. 1, EMU Notes in Mineralogy, Eötvös University Press, Budapest.
Bish, D.L. & Giese, R. (1981) Interlayer bonding in IIb chlorite. American Mineralogist, 66, 12161220.
Bourdelle, F., Parra, T., Chopin, C. & Beyssac, O. (2013) A new chlorite geothermometer for diagenetic to low-grade metamorphic conditions. Contributions to Mineralogy and Petrology, 165, 723735.
Hillier, S. (1994) Pore-Lining Chlorites in siliciclastic reservoir sandstones: electron-microprobe, SEM and XRD data, and implications for their origin. Clay Minerals, 29, 665679.
Inoué, S. (2016) Study of Fe-rich chlorite and 7Å-14 Å interstratified minerals using high-resolution electron microscopy. PhD Thesis, the University of Tokyo, Japan, 132 pp.
Inoué, S. & Kogure, T. (2016) High-resolution transmission electron microscopy (HRTEM) study of stacking irregularity in Fe-rich chlorite from selected hydrother-mal are deposits. Clays and Clay Minerals, 64, 131144.
Inoue, A., Meunier, A., Patrier-Mas, P., Rigault, C., Beaufort, D. & Vieillard, P. (2009) Application of chemical geothermometry to low-temperature trioctahe-dral chlorites. Clays and Clay Minerals, 57, 371382.
Ishizuka, K. (2002) A practical approach for STEM image simulation based on the FFT multislice method. Ultramicroscopy, 90, 7183.
Jiang, W.T., Peacor, D.R. & Slack, J.F. (1992) Microstructures, mixed layering, and polymorphism of chlorite and retrograde berthierine in the Kidd Creek massive sulfide deposit, Ontario. Clays and Clay Minerals, 40, 501514.
Kilaas, R. (1998) Optimal and near-optimal filters in high-resolution electron microscopy. Journal of Microscopy, 190, 4551.
Kogure, T. & Drits, V.A. (2010) Structural changes in celadonite and cis-vacant illite by electron radiation in TEM. Clays and Clay Minerals, 58, 522531.
Kogure, T. & Okunishi, E. (2010) Cs-corrected HAADF-STEM imaging of silicate minerals. Journal of Electron Microscopy, 59, 263271.
Marks, L.D. (1996) Wiener-filter enhancement of noisy HREM images. Ultramicroscopy, 62, 4352.
Pennycook, S.J. & Jesson, D.E. (1992) Atomic resolution Z-contrast imaging of interfaces. Acta Metallurgica et Materialia, 40, S149S159.
Rule, A.C. & Bailey, S. (1987) Refinement of the crystal structure of a monoclinic ferroan clinochlore. Clays and Clay Minerals, 35, 129138.
Shikazono, N. (2003) Geochemical and Tectonic Evolution of Arc-Backarc Hydrothermal Systems: Implication for the Origin ofKuroko and Epithermal Vein-Type Mineralizations and the Global Geochemical Cycle. Elsevier, Amsterdam, 463 pp.
Slack, J.F., Jiang, W.T., Peacor, D.R. & Okita, P.M. (1992) Hydrothermal and metamorphic berthierine from the Kidd Creek volcanogenic massive sulfide deposit, Timmins, Ontario. The Canadian Mineralogist, 30, 11271142.
Smyth, J.R., Dyar, M.D., May, H.M., Bricker, O.P. & Acker, J.G. (1997) Crystal structure refinement and Mössbauer spectroscopy of an ordered, triclinic clinochlore. Clays and Clay Minerals, 45, 544550.
Welch, M.D., Barras, J. & Klinowski, J. (1995) A multi-nuclear NMR study of clinochlore. American Mineralogist, 80, 441447.
Wicks, F. & O'Hanley, D.S. (1988) Serpentine minerals; structures and petrology. Pp. 91167 in: Hydrous Phyllosilicates (Exclusive of Micas) (S.W Bailey, editor). Vol. 19, Reviews in Mineralogy, Mineralogical Society of America, Washington D.C.
Xu, H.F. & Veblen, D.R. (1996) Interstratification and other reaction microstructures in the chlorite-berthierine series. Contributions to Mineralogy and Petrology, 124, 291301.
Xu, H., Shen, Z., Konishi, H. & Luo, G. (2014) Crystal structure of Guinier-Preston zones in orthopyroxene: Z-contrast imaging and ab inito study. American Mineralogist, 99, 20432048.
Zheng, H. & Bailey, S.W. (1989) Structures of intergrown triclinic and monoclinic IIb chlorites from Kenya. Clays and Clay Minerals, 37, 308316.

Keywords

Related content

Powered by UNSILO

High-angle annular dark field scanning transmission electron microscopic (HAADF-STEM) study of Fe-rich 7 Å–14 Å interstratified minerals from a hydrothermal deposit

  • Sayako Inoué (a1) and Toshihiro Kogure (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.