Changing mercury anomalies in Long Valley, California

indication for magma movement or seismic activity.

J. C. Varekamp, P R Buseck

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Mercury anomalies in soils in geothermal areas form as a result of vapour transport. Comparison of the Hg distribution in Long Valley, measured in 1975 and again in 1982, indicates that a new Hg anomaly formed in the Inyo crater zone in the intervening period. Two models can explain this new anomaly: 1) geothermal water has reached shallow levels as a result of increased permeability created by seismic activity, or 2) addition of a CO2-rich, magmatic vapour to the geothermal system at depth caused vapour exsolution in zones where it did not occur before. If the Hg anomaly in the Inyo crater zone is related to the addition of magmatic vapours, the site of the new anomaly may overlie young, intruding magma. (Authors' abstract) -C.N.

Original languageEnglish (US)
Pages (from-to)283-286
Number of pages4
JournalGeology
Volume12
Issue number5
DOIs
StatePublished - 1984

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magma
anomaly
valley
crater
exsolution
geothermal system
mercury
seismic activity
permeability
soil
water

ASJC Scopus subject areas

  • Geology

Cite this

Changing mercury anomalies in Long Valley, California : indication for magma movement or seismic activity. / Varekamp, J. C.; Buseck, P R.

In: Geology, Vol. 12, No. 5, 1984, p. 283-286.

Research output: Contribution to journalArticle

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