Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-23T15:44:36.544Z Has data issue: false hasContentIssue false
  • English
  • Français

The Genesis of some Micro-Veinlets in Cornish Granite-Porphyry1

Published online by Cambridge University Press:  01 May 2009

J. Stuart Webb
J. Stuart Webb
Affiliation:
Beit Scientific Research Fellow, Imperial College, London
Get access Rights & Permissions [Opens in a new window]

Extract

While studying the Cornish mineral deposits I have examined certain thin-sections cut from granite-porphyry dykes which contain numerous quartz or felspar veinlets. The structures in these veinlets and their behaviour towards the various constituents of the host rock are, I believe, sufficiently interesting to merit detailed description. The sequence of events to be deduced from these features is not commonly recognized, and the underlying principles may have a broader application to include some of the larger mineral veins in Cornwall.

Type
Articles
Information
Geological Magazine , Volume 84 , Issue 2 , April 1947 , pp. 65 - 78
Copyright
Copyright © Cambridge University Press 1947

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.)

Footnotes

1

Micro-sections described in this paper were prepared with the assistance of part of an award from the Parliamentary Grant in aid of Scientific Investigations administered by the Royal Society.

References

REFERENCES

Bain, G. W., 1936. The Mechanics of Metasomatism. Econ. Geol., vol. xxxi, No. 5.Google Scholar
Bateman, A. M., 1942. Econpmic Mineral Deposits, John Wiley, New York.Google Scholar
Becker, G. F., 1893. Discussion of Posepny's The Genesis of Ore Deposits, p. 602.Google Scholar
Boydell, H. C., 1926. A Discussion on Metasomatism and the Linear “Force of Growing Crystals”. Economic Geology, vol. xxi, No. 1. See further his discussions in Econ. Geol., 1927–8.Google Scholar
Church, J. A., 1893. Discussion of Posepny's The Genesis of Ore Deposits, p. 593.Google Scholar
Douglas, , Goodman, , and Milligan, , 1946. On the Nature of Replacement. Econ. Geol., vol. xli, No. 5, pp. 546–553.CrossRefGoogle Scholar
Emmons, W. H., 1940. Principles of Economic Geology, McGraw-Hill, London.Google Scholar
Goldschmidt, V. M., 1922. On the Metasomatic Processes in Silicate Rocks. Econ. Geol., vol. xvii, No. 2, pp. 105–123. See further his discussions in Econ. Geol., 1927–8.CrossRefGoogle Scholar
Irving, J. D., 1911. Replacement Ore Deposits and Criteria for their Recognition. Economic Geology, vol. vi, No. 6, pp. 527–361, 619–669.CrossRefGoogle Scholar
Lindgren, , Waldemar, , 1900. Metasomatic Processes in Fissure Veins. Trans. Am. Inst. Min. Engineers, vol. xxx.Google Scholar
Lindgren, , Waldemar, , 1912. The Nature of Replacement. Econ. Geol., vol. vii, pp. 521–535.CrossRefGoogle Scholar
Lindgren, , Waldemar, , 1925. Metasomatism. Geol. Soc. Amer. Bull., 36, pp. 247–261.CrossRefGoogle Scholar
Lindgren, , Waldemar, , 1933. Mineral Deposits, McGraw-Hill, New York.Google Scholar
Posepny, F., 1893. The Genesis of Ore Deposits. Trans. Am. Inst. Min. Engineers, vol. xxiii.Google Scholar
Webb, J. S., 1946. A Replacement “Pegmatite” Vein in the Cam Brea Granite. Geol. Mag., vol. lxxxiii, No. 4, pp. 177–185.CrossRefGoogle Scholar