Helium‐3 emission from Nevado Del Ruiz Volcano, Colombia

Stanley N. Williams, Yuji Sano, Hiroshi Wakita

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


High helium‐3/helium‐4 ratios, up to 6.6Ratm (6.6 times the atmospheric ratio of 1.40 × 10−6) were observed in nine samples of gases and hot waters from seven sites located around the volcano Nevado del Ruiz, Colombia. The values of the ratio decrease with distance from the crater. Such a tendency coincides well with the pattern first reported from the volcano Ontake, central Japan, and suggests a general signature of helium isotope ratios around individual volcanoes. The corrected helium‐3/helium‐4 ratios at one gas vent sampled twice over six months increased. This is interpreted to mean that the mantle contribution of helium may have increased with time.

Original languageEnglish (US)
Pages (from-to)1035-1038
Number of pages4
JournalGeophysical Research Letters
Issue number10
StatePublished - Oct 1987
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • General Earth and Planetary Sciences


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