Strontium isotopic geochemistry of Mississippi Valley-type deposits, East Tennessee: implications for age and source of mineralizing brines

S. E. Kesler, L. M. Jones, J. Ruiz

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

Strontium isotopic ratios of wall-rock, ore, and gangue minerals from the Mascot-Jefferson City, Copper Ridge, and Sweetwater Mississippi Valley-type (MVT) districts and from the Lost Creek barite deposit in East Tennessee were measured in an effort to determine the age of this mineralization and its relation to the tectonic evolution of the Appalachian orogen. Of the three possible source basins for the MVT brines, the Late Proterozoic Ocoee, Cambrian Luttrell, and Ordovician Sevier basins, the Sevier basin appears to be the only one that could have supplied brines of the appropriate composition at geologically reasonable times. Maximum ages of the Lost Creek, Sweetwater, Copper Ridge, and Mascot-Jefferson City mineralization are 520, 460, 405 and 395 my, respectively. -from Authors

Original languageEnglish (US)
Pages (from-to)1300-1307
Number of pages8
JournalGeological Society of America Bulletin
Volume100
Issue number8
DOIs
StatePublished - Jan 1 1988
Externally publishedYes

ASJC Scopus subject areas

  • Geology

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