Cooling history of young Hungarian basalts based on zoning of olivine phenocrysts.

Research output: Contribution to journalArticle

Abstract

The mathematical study of diffusional zoning in olivines from Hungarian alkali basalts is discussed, assuming both constant T, and T changing with time. The Fe-Mg distribution profiles of the olivine grains were determined by electron microprobe and can be reasonably well matched by the concentration profiles generated by diffusion. On this basis the cooling rate, or the steady T directly before eruption, of some basalt samples are calculated; the cooling rates obtained range from 0.7-5.5oC per day, the original T being 1250o-960oC.-R.A.H.

Original languageEnglish
Pages (from-to)321-339
Number of pages19
JournalActa Geologica Hungarica
Volume26
Issue number3-4
Publication statusPublished - Jan 1 1983

ASJC Scopus subject areas

  • Geology

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