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The Meteoric Stones of Launton, Warbreccan, Cronstad, Daniel's Kuil, Khairpur, and Soko-Banja1

Published online by Cambridge University Press:  14 March 2018

G. T. Prior
G. T. Prior*
Affiliation:
Mineral Department of the British Museum
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Extract

The investigation of the Launton, Warbreccan, and Cronstad meteorites was undertaken with the object of placing on record descriptions of these stones. Launton and Warbreccan were found to conform very well with the type of Baroti and Wittekrantz, containing from 7-9 per cent. of nickel-iron, described in a previous paper. Cronstad, however, which contained as much as 18 per cent. of nickel-iron, showed so much variation from that type as to suggest a passage towards the rare Hvittis class of chrondritic stone containing even larger amounts of nickel-iron.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 18 , Issue 83 , November 1916 , pp. 1 - 25
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1916

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Footnotes

1

Communicated by permission of the Trustees of the British Museum.

References

page 1 note 2 Prior, G. T., Mineralogical Magazine, 1913, vol. xvii, p. 22 CrossRefGoogle Scholar.

page 2 note 1 Stone, W., Mag. Nat. Hist., 1831, vol. iv, p. 189 Google Scholar.

page 4 note 1 Prior, G. T., Mineralogical Magazine, 1918-14, vol. xvii, pp. 24, 132Google Scholar.

page 4 note 2 On the occurrence of such elements in meteorites see Merrill, G. P., Mem. Nat. Acad. Sciences, Washington, 1916, vol. xiv, p. 1 Google Scholar.

page 5 note 1 From analysis of unattracted portion.

page 6 note 1 Prior, G.T., Mineralogical Magazine, 1913, vol. xvii, p. 22 CrossRefGoogle Scholar.

page 9 note 1 From analysis of unattrscted portion.

page 10 note 1 W. Flight, 'A Chapter in the History of Meteorite6,' 1887, p. 205.

page 10 note 2 Rudge, W. A. D., Trans. Roy. Sor S. Africa, 1912, vol. ii, p. 211 Google Scholar.

page 11 note 1 Probably too low, as the separation from iron was by means of ammonia. This applies also to the following analyses, but not to tboee of Lauuton and Warbreccan.

page 13 note 1 Gregory, J. R., Geol. Mag., 1868, vol. v, p. 581 Google Scholar.

page 13 note 2 Church, A. H., Journ. Chem. Soc., 1869, vol. vii, p. 22 CrossRefGoogle Scholar.

page 14 note 1 Lacroix, A., Bull. Soc. franç. Min, 1905, vol. xxviii, p. 70 Google Scholar.

page 14 note 2 The percentage of silica is unaccountably high as compared with that of the MgO. In the analysis of St. Marks, a stone probably also belonging to the Hvittis type, Cohen noted a similar excess of silica in the soluble portion (Ann. S. African Museum, 1906, vol. v, p. 14), and free silica was also detected in thin sections of the meteorite under the microscope.

page 15 note 1 Loss on ignition of insoluble.

page 15 note 2 Containing a little Cr2O3.

page 16 note 1 Borgström, L. H., 'Die Meteoriten yon Hvittis und Marjalahti.' Bull. Comm. Géol. Finlande, 1908, vol. iii, No. 14, p. 24 Google Scholar.

page 17 note 1 Medlicott, H. B., Journ. Asiatic Soc. Bengal, 1874, vol. xliii, p. 33 Google Scholar.

page 18 note 1 The specific gravity is low as compared with Daniel's Kuil, but the Khairpur stones had undergone more oxidation. The method of determination by hydrostatic weighing also gives lower results than that by the pyknometer.

page 20 note 1 Rrepresents excess of Fe over that required to form FeS : it is considered to be the result of oxidation of the sample analysed, and is reckoned as Fe2O3.

page 20 note 2 Calculated from difference between total Cr and that in the insoluble.

page 20 note 3 Loss on ignition of insoluble.

page 22 note 1 W. Flight (Proc. Roy. Soc., 1881-2, p. 84) more than thirty years ago came to the conclusion that the less the amount of nickel-iron in meteoric stones the richer it was in nickel, but hitherto the idea appears to have met with no general acceptance.

page 22 note 2 E. Doll, Verb. k.-k. Geol. Reichsanstalt, Wien, 1877, p. 283.

page 22 note 3 Lceanitch, S. M., Ber. Deutsch. Chem. Gesell., 1878, vol. xi, p. 96 CrossRefGoogle Scholar.

page 24 note 1 From analysis of unattracted portion.