Magmatic intrusion west of Three Sisters, central Oregon, USA: The perspective from spring geochemistry

William C. Evans, Matthijs Van Soest, Robert H. Mariner, Shaul Hurwitz, Steven E. Ingebritsen, Charles W. Wicks, Mariek E. Schmidt

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

A geochemical investigation of springs near Three Sisters volcanoes was conducted in response to the detection of crustal uplift west of the peaks. Dilute, low-temperature springs near the center of uplift show 3He/4He ratios ≥7RA (RA is the ratio in air), and transport in total ∼16 MW of heat and ∼180 g/s of magmatic carbon (as CO2). These anomalous conditions clearly reflect the influence of magma, but they seemingly predate the onset of the present uplift and derive from a previous event. Episodes of intrusion may thus be more common in this area than the age of eruptive vents would imply.

Original languageEnglish (US)
Pages (from-to)69-72
Number of pages4
JournalGeology
Volume32
Issue number1
DOIs
StatePublished - Jan 1 2004
Externally publishedYes

Fingerprint

uplift
geochemistry
volcano
magma
carbon
air
detection

Keywords

  • Gases
  • Intrusions
  • Oregon
  • Springs
  • Three sisters

ASJC Scopus subject areas

  • Geology

Cite this

Evans, W. C., Van Soest, M., Mariner, R. H., Hurwitz, S., Ingebritsen, S. E., Wicks, C. W., & Schmidt, M. E. (2004). Magmatic intrusion west of Three Sisters, central Oregon, USA: The perspective from spring geochemistry. Geology, 32(1), 69-72. https://doi.org/10.1130/G19974.1

Magmatic intrusion west of Three Sisters, central Oregon, USA : The perspective from spring geochemistry. / Evans, William C.; Van Soest, Matthijs; Mariner, Robert H.; Hurwitz, Shaul; Ingebritsen, Steven E.; Wicks, Charles W.; Schmidt, Mariek E.

In: Geology, Vol. 32, No. 1, 01.01.2004, p. 69-72.

Research output: Contribution to journalArticle

Evans, WC, Van Soest, M, Mariner, RH, Hurwitz, S, Ingebritsen, SE, Wicks, CW & Schmidt, ME 2004, 'Magmatic intrusion west of Three Sisters, central Oregon, USA: The perspective from spring geochemistry', Geology, vol. 32, no. 1, pp. 69-72. https://doi.org/10.1130/G19974.1
Evans, William C. ; Van Soest, Matthijs ; Mariner, Robert H. ; Hurwitz, Shaul ; Ingebritsen, Steven E. ; Wicks, Charles W. ; Schmidt, Mariek E. / Magmatic intrusion west of Three Sisters, central Oregon, USA : The perspective from spring geochemistry. In: Geology. 2004 ; Vol. 32, No. 1. pp. 69-72.
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