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Formation of laths in fine-grained micas and its relationship to stacking mechanism

Published online by Cambridge University Press:  05 July 2018

N. Güven
N. Güven*
Affiliation:
Department of Geosciences, Texas Tech. University, P.O. Box 4Io9, Lubbock, Texas 794o9, U.S.A.
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Summary

Transmission electron images of fine-grained micas from various clay deposits exhibit lath-shaped units arranged in modes similar to the stacking of layers in different mica polymorphs. Micas in a Georgia bentonite display two sets of parallel laths intersecting at an angle of 120°. Selected area electron diffraction (SAD) of these micas gives a sharp spot pattern indicating a perfect registry between the lattices of individual laths. Furthermore, the SAD pattern has an intensity distribution similar to that of a 2M1 dioctahedral mica. Another mica in an India bentonite shows one set of parallel laths with an intensity distribution expected from a IM biotite. Some of the micas in the Marblehead illite exhibit three sets of parallel laths in a trigonal arrangement similar to the stacking in 3T mica.

Type
Research Article
Information
Mineralogical Magazine , Volume 39 , Issue 307 , September 1974 , pp. 788 - 792
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1974

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References

Anelinckx, (S.), 1952. Nature, 169, 580.CrossRefGoogle Scholar
Anelinckx, (S.) and Dekeyser, (W.), 1953. Compt. Rend. 19e, Congr. Geol. Int. Algiers 1952, 18, 1 [M.A. 12-52o].Google Scholar
Barosnet, (A.), 1972. Amer. Min., 57, x272 [M.A. 74-16o3].Google Scholar
Burtox, (W. K.), Caarera, (F.). and Frank(F. C.), 1949- Nature, 168, 398 [M.A. 12-312].Google Scholar
Frank, (F. C.), 1949. Farad. Soc. Discuss., 5, 48.CrossRefGoogle Scholar
Güven, (N.), 1971. Clays and Clay Min., 19, 159 [M.A. 73-228].CrossRefGoogle Scholar
Güven, (N.) 1972. Ibid. 20, 83 [M.A. 73-t84].CrossRefGoogle Scholar
Güven, (N.) 1974. Ibid. (in press).Google Scholar
Smith, (J. V.) and Yoder, (H. S. , Jr.), 1956. Min. Mag., 31, 2o9.Google Scholar
Sunagawa, (I.), 1964. Amer. Min., 49, 1427.Google Scholar