Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-23T15:33:55.706Z Has data issue: false hasContentIssue false
  • English
  • Français

Low-potash dacite drift pumice from the Coral Sea

Published online by Cambridge University Press:  01 May 2009

W. B. Bryan
W. B. Bryan
Affiliation:
Geophysical Laboratory, Carnegie Institution, 2801 Upton Street, N.W., Washington D.C. 20008.
Get access Rights & Permissions [Opens in a new window]

Summary

Drift pumice collected in December, 1964, from the Herald Cays in the western Coral Sea is chemically and petrographically a dacite, unusually low in K2O and with very calcic plagioclase. It is apparently identical to pumice washed ashore in Fiji in March, 1965; both collections are divisible into light and dark varieties on megascopic, optical and chemical criteria. This pumice is distinguishable from the widely distributed pumice of the 1962 South Sandwich eruption; it is considered to have originated along the Tonga-Kermadec ridge on the basis of available seismic and compositional data.

Type
Articles
Information
Geological Magazine , Volume 105 , Issue 5 , October 1968 , pp. 431 - 439
Copyright
Copyright © Cambridge University Press 1968

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

Coombs, D. S. & Landis, C. A. 1966. Pumice from the South Sandwich eruption of March, 1962, reaches New Zealand. Nature, Lond., 209, 289–290.CrossRefGoogle Scholar
Emmons, R. C. & Gates, R. M. 1948. The use of Becke line colors in refractive index determination. Am. Miner., 33, 612–8.Google Scholar
Ewart, A. 1963. Petrology and petrogenesis of the Quaternary pumice ash in the Taupo area, New Zealand. J. Petrology, 4, 392–431.CrossRefGoogle Scholar
Gass, I. G., Harris, P. G. & Holdgate, M. W. 1963. Pumice eruption in the area of the South Sandwich Islands. Geol. Mag., 100, 321–330.CrossRefGoogle Scholar
Healy, J., Lloyd, E. F., Banwell, C. J. & Adams, R. D. 1964. Volcanic eruption on Raoul Island, November, 1964. Nature, Lond., 205, 743–5.CrossRefGoogle Scholar
Kibblewhite, A. C. 1966. The acoustic detection and location of an underwater volcano. N.Z. J. Sci., 9, 178–199.Google Scholar
LaCroix, A. 1939a. Remarques sur les volcans sous-marins, à propos des ponces rhyolitiques recuillies sur l'atoll Marutea de Sud (Archipel des Tuamotu). C. R. Acad. Sci. Paris, 208, 609–611.Google Scholar
LaCroix, A. 1939b. Les ponces dacitiques flottant sur l'océan, entre des Fiji, les Nouvelles-Hébrides et la Nouvelle-Calédonie. C. R. Acad. Sci. Paris, 208, 853–7.Google Scholar
LaCroix, A. 1939c. Composition mineralogique et chimique des laves des volcans des iles de l'Ocean Pacifique situées entre l'Equateur et le tropique du Capricorne, le 175° de longitude ouest et le 165° de longitude est. Mem. Acad. Sci. Paris, 63, 1–97.Google Scholar
McMichael, D. F. & Yaldwyn, J. C. 1965. Collecting in the Coral Sea. Aust. Nat. Hist., 15, 33–38.Google Scholar
Richard, J. J. 1962. Catalogue of the Active Volcanoes of the World, Part XIII: Kermadec, Tonga, and Samoa. International Ass. Volc., Rome, 1–38.Google Scholar
Richards, A. F. 1958. Transpacific distribution of floating pumice from Isla San Benedicto, Mexico. Deep-Sea Research, 5, 29–35.Google Scholar
Richards, A. F. 1966. Geology of the Islas Revillagigedo, Mexico, 2. Geology and Petrography of Isla San Benedicto. Proc. Cal. Acad. Sci., 33, 361–414.Google Scholar
Sutherland, F. F. 1965. Dispersal of pumice, supposedly from the 1962 South Sandwich Islands eruption, on southern Australian shores. Nature, Lond., 207, 1332–5.CrossRefGoogle Scholar
Sykes, L. R. 1966. The seismicity and deep structure of island arcs. J. geophys. Res., 71, 2981–3006.CrossRefGoogle Scholar