Mantle helium in ground waters of eastern North America: time and space constraints on sources

T. Torgersen, S. Drenkard, M. Stute, P. Schlosser, A. Shapiro

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Mantle helium in continental environments is generally considered to be the result of active volcanism and/or active extension. The latest episodes of volcanism in northeastern North America are the track of the New England hotspot (95-190 Ma) and the closure of the Iapetus sea (before 300 Ma). Thus, the identification of mantle helium in young ground waters of central New England is counter to the conventional wisdom. On the basis of evaluation of helium evolution in emplaced magmas, an "aged' mantle source is postulated for the excess helium component in ground water of central New England. This gas-rich initial condition may support the concept of a volatile-enriched mantle wedge and thus explain the increased buoyancy flux of the New England hotspot as it traversed eastern North America. -from Authors

Original languageEnglish (US)
Pages (from-to)675-678
Number of pages4
JournalGeology
Volume23
Issue number8
DOIs
StatePublished - Jan 1 1995
Externally publishedYes

ASJC Scopus subject areas

  • Geology

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