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X-ray studies of natural fabrics: I. Growth-fabrics in hematite kidney ore and in fibrous calcite

Published online by Cambridge University Press:  14 March 2018

R. Bradshaw  and
F. C. Phillips
R. Bradshaw
Affiliation:
Department of Geology, University of Bristol
F. C. Phillips
Affiliation:
Department of Geology, University of Bristol
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Summary

Fibres of hematite in kidney ore are elongated at right angles to the c-axis. The fibre axis, which may be normal to a face of either of the hexagonal prisms {101̄0} or {112̄0}, may show an abrupt change of orientation along the length of a fibre. There is little preferred orientation around the length of the fibres.

It is confirmed that in some calcite satin spar the fibres are elongated parallel to an edge of the cleavage rhombohedron; in other fibrous growths the elongation is either parallel to or Perpendicular to c.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 36 , Issue 277 , March 1967 , pp. 70 - 77
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1967

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