Skip to main content Accessibility help
×
Home

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

  • J. Stuart Webb (a1)

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.

Copyright

Footnotes

Hide All
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.

Footnotes

References

Hide All
Bain, G. W., 1936. The Mechanics of Metasomatism. Econ. Geol., vol. xxxi, No. 5.
Bateman, A. M., 1942. Econpmic Mineral Deposits, John Wiley, New York.
Becker, G. F., 1893. Discussion of Posepny's The Genesis of Ore Deposits, p. 602.
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.
Church, J. A., 1893. Discussion of Posepny's The Genesis of Ore Deposits, p. 593.
Douglas, , Goodman, , and Milligan, , 1946. On the Nature of Replacement. Econ. Geol., vol. xli, No. 5, pp. 546553.
Emmons, W. H., 1940. Principles of Economic Geology, McGraw-Hill, London.
Goldschmidt, V. M., 1922. On the Metasomatic Processes in Silicate Rocks. Econ. Geol., vol. xvii, No. 2, pp. 105123. See further his discussions in Econ. Geol., 1927–8.
Irving, J. D., 1911. Replacement Ore Deposits and Criteria for their Recognition. Economic Geology, vol. vi, No. 6, pp. 527–361, 619–669.
Lindgren, , Waldemar, , 1900. Metasomatic Processes in Fissure Veins. Trans. Am. Inst. Min. Engineers, vol. xxx.
Lindgren, , Waldemar, , 1912. The Nature of Replacement. Econ. Geol., vol. vii, pp. 521535.
Lindgren, , Waldemar, , 1925. Metasomatism. Geol. Soc. Amer. Bull., 36, pp. 247261.
Lindgren, , Waldemar, , 1933. Mineral Deposits, McGraw-Hill, New York.
Posepny, F., 1893. The Genesis of Ore Deposits. Trans. Am. Inst. Min. Engineers, vol. xxiii.
Webb, J. S., 1946. A Replacement “Pegmatite” Vein in the Cam Brea Granite. Geol. Mag., vol. lxxxiii, No. 4, pp. 177185.

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed