Crossref journal-article
Mineralogical Society
Clay Minerals (7149)
Abstract

AbstractInterlayered (<20 µm scale) vermiculite-smectite minerals were found in drill-cores from altered Otago schist basement up to 2 m from the contact with the overlying sediment. Mineral compositions defined a series from Fe2+-rich trioctahedral vermiculite to Fe2+-bearing dioctahedral smectite; in these, tetrahedral substitution of Al for Si was unusually high (up to 3·3/8 in the formula unit). The minerals formed as intermediates during the alteration of chlorite to kaolinite under non-oxidizing, possibly acid conditions. The source of the altering solutions may have been overlying lignite seams.

Bibliography

Craw, D. (1984). Ferrous-iron-bearing vermiculite-smectite series formed during alteration of chlorite to kaolinite, Otago Schist, New Zealand. Clay Minerals, 19(4), 509–520.

Authors 1
  1. D. Craw (first)
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Dates
Type When
Created 18 years, 8 months ago (Dec. 7, 2006, 6:02 p.m.)
Deposited 6 years, 3 months ago (May 23, 2019, 3:46 p.m.)
Indexed 1 year, 10 months ago (Oct. 30, 2023, 1:13 a.m.)
Issued 41 years ago (Sept. 1, 1984)
Published 41 years ago (Sept. 1, 1984)
Published Online 7 years, 1 month ago (July 9, 2018)
Published Print 41 years ago (Sept. 1, 1984)
Funders 0

None

@article{Craw_1984, title={Ferrous-iron-bearing vermiculite-smectite series formed during alteration of chlorite to kaolinite, Otago Schist, New Zealand}, volume={19}, ISSN={1471-8030}, url={http://dx.doi.org/10.1180/claymin.1984.019.4.01}, DOI={10.1180/claymin.1984.019.4.01}, number={4}, journal={Clay Minerals}, publisher={Mineralogical Society}, author={Craw, D.}, year={1984}, month=sep, pages={509–520} }