Hostname: page-component-77c89778f8-swr86 Total loading time: 0 Render date: 2024-07-23T21:13:28.679Z Has data issue: false hasContentIssue false
  • English
  • Français

Zoned Plagioclases in Layered Gabbros of the Skaergaard Intrusion, East Greenland

Published online by Cambridge University Press:  14 March 2018

J. M. Carr
Get access Rights & Permissions [Opens in a new window]

Extract

A limited amount of careful optical work has been carried out on X three analysed felspars of gabbros belonging to the main layered series of the Skaergaard intrusion, east Greenland (Wager and Deer, 1939). The work was begun with the intention of providing precise optical data to be used in further defining the relationship between composition and optics. The primary precipitate felspar crystals, hitherto thought to be devoid of zoning, were found, however, to possess a zoning which prevents the data being used in this way.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 30 , Issue 225 , June 1954 , pp. 367 - 375
Copyright
Copyright © 1954, The Mineralogical Society

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Barber, (C.T.), 1936. The determination of felspars by the Fedoroff method. Mem. Geol. Surv. India, vol. 68, pt. II, p. 221.Google Scholar
Birch, (F.) et al., 1942. Handbook of physical constants. Geol. Soc. Amer., Special Paper 36. [M.A. 8-277.]Google Scholar
Emmons, (R.C.), 1943. The universal stage. Mere. Geol. Soe. Amer., no. 8. [M.A. 9-18.]Google Scholar
Hills, (E.S.), 1936. Reverse and oscillatory zoning in plagioclase felspars. Geol. Mag., vol. 73, pp. 49.56. [M.A. 6-293.]Google Scholar
Kracek, (F.C.) and Neuvonen, (K.J.), 1952. Thermochemistry of plagioclase and alkali feldspars. Amer. Journ. Sci., :Bowen volume, pp. 293.318. [M.A. 12- 134.]Google Scholar
Phemister, (J.), 1934. Zoning in plagioclase felspar. Min. Mag., vol. 23, pp. 541. 555.Google Scholar
Tsuboi, (S.), 1923. A dispersion method of determining plagioelases in cleavageflakes. Min. Mag., vol. 20, pp. 108122.Google Scholar
Wager, (L.R.) and Deer, (W.A.), 1939. Geological investigations in east Greenland, Part Iii. Petrology of the Skaergaard intrusion, Kangerdlugssuaq, east Greenland. Meddel. om Gronland, vol. 105, no. 4, pp. 1.352. [M.A. 8-27.].Google Scholar
Wager, (L.R.) and Mitchell, (R.L.), 1951. The distribution of trace elements during strong fractionation of basic magma—-a further study of the Skaergaard intrusion, east Greenland. Geochim. et Cosmochim. Acta, vol. 1, pp. 129.208. [M.A. 1 1 - 495.]Google Scholar
Winchell, (A.N.), 1951. Elements of optical mineralogy. Pt. II . New York, 1951. [M.A. 11-463.]CrossRefGoogle Scholar