Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-23T23:42:34.353Z Has data issue: false hasContentIssue false
  • English
  • Français

A Note on the Dunite (Peridotite) Mylonites of St. Paul's Rocks (Atlantic)

Published online by Cambridge University Press:  01 May 2009

C. E. Tilley
C. E. Tilley
Affiliation:
Department of Mineralogy and Petrology, Downing Place, Cambridge.
Get access Rights & Permissions [Opens in a new window]

Extract

The mylonitic character of the peridotites of St. Paul's Rocks on the Mid-Atlantic Ridge was reported in a contribution by the writer (Tilley, 1947), these ultrabasics then being referred to as dunite or peridotite mylonites. The available chemical analytical data were assembled in that paper and a new analysis provided of a two-pyroxene representative. The type carrying porphyroclastic amphibole was represented by an analysis by Washington (1930) but it was shown that this analysis erred in its alkali determination, and that the reported occurrence of jadeite could not be confirmed.

Type
Articles
Information
Geological Magazine , Volume 103 , Issue 2 , April 1966 , pp. 120 - 123
Copyright
Copyright © Cambridge University Press 1966

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

REFERENCES

Green, D. H., 1963. Alumina Content of Enstatite in a Venezuelan high temperature peridotite. Bull. geol. Soc. Amer., 74, 1397–1402.CrossRefGoogle Scholar
Hess, H. H., 1964. The oceanic crust, the upper mantle and the Mayaguez serpentinized peridotite. Publ. 1188 (A study of serpentinite). Nat. Acad. Sci. Nat. Res. Council, Washington, D.C., 169–175.Google Scholar
Kushiro, I., and Kuno, H., 1963. Origin of primary basalt magmas and classification of basaltic rocks. J. Petrol., 4, 75–89.CrossRefGoogle Scholar
Mackenzie, D. B., 1960. High temperature alpine-type peridotite from Venezuela. Bull. geol. Soc. Amer., 71, 303–318.CrossRefGoogle Scholar
Renard, A., 1882. Challenger Report Narrative, 2, Appendix B, 29.Google Scholar
Tilley, C. E., 1947. The dunite mylonites of St. Paul's Rocks (Atlantic). Amer. J. Sci., 245, 483–491.CrossRefGoogle Scholar
Tilley, C. E., 1955. Contribution to discussion on the Origin of the Earth. Proc. geol. Soc. Lond., 1521, 48–49.Google Scholar
Washington, H. S., 1930. The petrology of St. Paul's Rocks (Atlantic). Quest Expedition Report, Brit. Museum Publ., 126–144.Google Scholar