Origin of the Quaternary basalts from the black rock desert region, Utah: Strontium isotopic evidence

Paul Pushkar; Kent C. Condie

doi:10.1130/0016-7606(1973)84<1053:OOTQBF>2.0.CO;2

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 journal › Article › peer-review

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 language	English
Pages (from-to)	1053-1058
Number of pages	6
Journal	Bulletin of the Geological Society of America
Volume	84
Issue number	3
DOIs	https://doi.org/10.1130/0016-7606(1973)84<1053:OOTQBF>2.0.CO;2
Publication status	Published - 1973
Externally published	Yes

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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.",

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AU - Condie, Kent C.

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AB - 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.

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DO - 10.1130/0016-7606(1973)84<1053:OOTQBF>2.0.CO;2

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JO - Bulletin of the Geological Society of America

JF - Bulletin of the Geological Society of America

IS - 3

ER -

Origin of the Quaternary basalts from the black rock desert region, Utah: Strontium isotopic evidence

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