Origin of the Quaternary basalts from the black rock desert region, Utah

Strontium isotopic evidence

Paul Pushkar*, Kent C. Condie

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The basalts of the Black Rock Desert region in Utah have Sr87/Sr86 ratios that vary from 0.7044 to 0.7059. Although this variation may be explained by derivation from inhomogenous mantle, it is also broadly compatible with a fractionation-assimilation model proposed for these basalts. Basalts of the Ice Spring field show an increase in Sr87/Sr86 with decreasing Rb and Rb/Sr as a function of eruptive age. Such a trend may be explained by mixing of magmas having different differentiation-assimilation histories.

Original languageEnglish
Pages (from-to)1053-1058
Number of pages6
JournalBulletin of the Geological Society of America
Volume84
Issue number3
DOIs
Publication statusPublished - 1973
Externally publishedYes

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