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On Langbeinite from the Punjab Salt Range

Published online by Cambridge University Press:  14 March 2018

F. R. Mallet
F. R. Mallet*
Affiliation:
Geological Survey of India
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Extract

In the eleventh volume of the Mineralogical Magazine, p. 817, in connection with the occurrence of blödite at the Mayo mines, in the Salt Range, allusion is incidentally made to a potassio-masnesian deposit, which was discovered there by Dr. H. Warth in 1878. It occurred as a lenticular stratum in the ' kallar' (impure rock salt) hand separating the Sujewal and Purwála salt beds. The material was more or less mixed up with the ' kallar' itself, and the deposit appeared to be of very limited extent.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 12 , Issue 56 , October 1899 , pp. 159 - 166
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1899

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References

page 159 note 1 Mem. Geol. Surv. India, 1878, XIV. 80.

page 159 note 2 Reprinted in Mr. A.B. Wynne's memoir on the geology of the Salt Range, Mm. G.ed. Sure. India, 1878, XIV. 80.

page 160 note 1 Sqitzungsher. Wien. Akad. LXIII. 1871, 805.

page 160 note 2 Tseherm. Min. Mitth. 1873, 135; Jahrb. d. k.k. geol. Reichsanst. Wien, 1873, XXIII.; Rec. Geol. Sure. India, VII. 1874, 64.

page 160 note 3 Zeits.f. angewandte Chemic, 1891,356.

page 161 note 1 Precht, Zeits. f. angewandte Chemie, 1897, 68.

page 161 note 2 Precht, ibid. 1897, 68.

page 161 note 3 Ibid. 1897, 68; and O. Luedecke, 2;tits. Kryat. Min. XXIX. (I898), 255.

page 161 note 4 Loc. cit.

page 162 note 1 For reasons given below, water could scarcely exist, as such, in the inclusions.

page 163 note 1 K2SO4, 42.00 per cent.; MgSO4 58.00 percent.

page 163 note 2 The quantifies found were Na.15, Cl.26, while theoretically the proportion is .17 to .26.

page 163 note 3 Allowing for the water already present in the langbeinite (and the NaCl), this is equal to an absorption of about 58 to 58½ per cent., the excess over the theoretical amount being no doubt due to hygroscopic moisture. The latter cannot be extracted by H2SO4 as efflorescence takes place under such circumstances.

page 164 note 1 Since the above was written Dr. Warth has informed that the salts in question were found at two spots, about 300 feet apart. At one of these magnesium salts predominate; at the other, potassium salts; the latter may perhaps have been a little higher up (Sn a higher horizon) in the Kallar bed than the other, but this is uncertain.

page 165 note 1 Chemische Industrie, III. (1880). 418, and Zdts.f. angewandte Chemie, 1897, 68.

page 165 note 2 Records, Geol. Surv. India, XXIV. 26 and 235.

page 165 note 3 The references are far from complete, only some of the more important being given. For the literature of the subject, Mem. Geol Eurv. India, Vol. XIV.; A Manual of the Geology of india, Parts II. LII. and IV., and Rec. Geol. Sure. India, XXIV, 19 and 280, may be consulted.

page 165 note 4 The primary nature of the sylvite and kieaerite, and secondary character of the selenite, glauberite, and blödite, was pointed out by Dr. Warth in a letter respecting blödite that I received from him in 1897.