Abstract

Hg contents of soils in geothermal areas in the western U.S. were measured and a three-fold distribution was observed: peak, aureole and background. Peak values (up to several 100 ppm Hg) occur in fumaroles of vapour-dominated systems, around hot springs, and in zones overlying steeply dipping, hot-water aquifers. Aureoic values (up to several 100 ppb Hg) are found in zones surrounding the peak areas and delineate areas with shallow geothermal convection. Background values vary between 7 and 40 ppb Hg (geometric mean). Usually, Hg is present in a form that can be easily re-volatilized and released to the atmosphere. Altered areas related to fossil hydrothermal systems can be distinguished from alteration related to active systems by their Hg contents. In the rare cases of Hg enrichments as cinnabar or as traces in other sulphides (pyrite, sphalerite) the Hg is not easily released from its host phase, and distinction between active and fossil systems is not possible. Hg anomaly patterns yield information on the presence as well as the geometry of shallow geothermal circulation patterns. In conjunction with structural geologic data, Hg patterns can be helpful in defining reservoir boundaries and can aid in the selection of drill site location.

Original languageEnglish (US)
Pages (from-to)29-47
Number of pages19
JournalGeothermics
Volume12
Issue number1
DOIs
StatePublished - 1983

Fingerprint

Hot springs
Pyrites
Aquifers
Vapors
fossil
Soils
cinnabar
anomaly
fumarole
aureole
Geometry
thermal spring
hydrothermal system
sphalerite
Water
pyrite
soil
convection
sulfide
aquifer

ASJC Scopus subject areas

  • Geology
  • Geotechnical Engineering and Engineering Geology
  • Renewable Energy, Sustainability and the Environment

Cite this

Hg anomalies in soils : A geochemical exploration method for geothermal areas. / Varekamp, J. C.; Buseck, P R.

In: Geothermics, Vol. 12, No. 1, 1983, p. 29-47.

Research output: Contribution to journalArticle

@article{372a4f809a17424290dd6d35ddf9a897,
title = "Hg anomalies in soils: A geochemical exploration method for geothermal areas",
abstract = "Hg contents of soils in geothermal areas in the western U.S. were measured and a three-fold distribution was observed: peak, aureole and background. Peak values (up to several 100 ppm Hg) occur in fumaroles of vapour-dominated systems, around hot springs, and in zones overlying steeply dipping, hot-water aquifers. Aureoic values (up to several 100 ppb Hg) are found in zones surrounding the peak areas and delineate areas with shallow geothermal convection. Background values vary between 7 and 40 ppb Hg (geometric mean). Usually, Hg is present in a form that can be easily re-volatilized and released to the atmosphere. Altered areas related to fossil hydrothermal systems can be distinguished from alteration related to active systems by their Hg contents. In the rare cases of Hg enrichments as cinnabar or as traces in other sulphides (pyrite, sphalerite) the Hg is not easily released from its host phase, and distinction between active and fossil systems is not possible. Hg anomaly patterns yield information on the presence as well as the geometry of shallow geothermal circulation patterns. In conjunction with structural geologic data, Hg patterns can be helpful in defining reservoir boundaries and can aid in the selection of drill site location.",
author = "Varekamp, {J. C.} and Buseck, {P R}",
year = "1983",
doi = "10.1016/0375-6505(83)90039-1",
language = "English (US)",
volume = "12",
pages = "29--47",
journal = "Geothermics",
issn = "0375-6505",
publisher = "Elsevier Limited",
number = "1",

}

TY - JOUR

T1 - Hg anomalies in soils

T2 - A geochemical exploration method for geothermal areas

AU - Varekamp, J. C.

AU - Buseck, P R

PY - 1983

Y1 - 1983

N2 - Hg contents of soils in geothermal areas in the western U.S. were measured and a three-fold distribution was observed: peak, aureole and background. Peak values (up to several 100 ppm Hg) occur in fumaroles of vapour-dominated systems, around hot springs, and in zones overlying steeply dipping, hot-water aquifers. Aureoic values (up to several 100 ppb Hg) are found in zones surrounding the peak areas and delineate areas with shallow geothermal convection. Background values vary between 7 and 40 ppb Hg (geometric mean). Usually, Hg is present in a form that can be easily re-volatilized and released to the atmosphere. Altered areas related to fossil hydrothermal systems can be distinguished from alteration related to active systems by their Hg contents. In the rare cases of Hg enrichments as cinnabar or as traces in other sulphides (pyrite, sphalerite) the Hg is not easily released from its host phase, and distinction between active and fossil systems is not possible. Hg anomaly patterns yield information on the presence as well as the geometry of shallow geothermal circulation patterns. In conjunction with structural geologic data, Hg patterns can be helpful in defining reservoir boundaries and can aid in the selection of drill site location.

AB - Hg contents of soils in geothermal areas in the western U.S. were measured and a three-fold distribution was observed: peak, aureole and background. Peak values (up to several 100 ppm Hg) occur in fumaroles of vapour-dominated systems, around hot springs, and in zones overlying steeply dipping, hot-water aquifers. Aureoic values (up to several 100 ppb Hg) are found in zones surrounding the peak areas and delineate areas with shallow geothermal convection. Background values vary between 7 and 40 ppb Hg (geometric mean). Usually, Hg is present in a form that can be easily re-volatilized and released to the atmosphere. Altered areas related to fossil hydrothermal systems can be distinguished from alteration related to active systems by their Hg contents. In the rare cases of Hg enrichments as cinnabar or as traces in other sulphides (pyrite, sphalerite) the Hg is not easily released from its host phase, and distinction between active and fossil systems is not possible. Hg anomaly patterns yield information on the presence as well as the geometry of shallow geothermal circulation patterns. In conjunction with structural geologic data, Hg patterns can be helpful in defining reservoir boundaries and can aid in the selection of drill site location.

UR - http://www.scopus.com/inward/record.url?scp=0020862121&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0020862121&partnerID=8YFLogxK

U2 - 10.1016/0375-6505(83)90039-1

DO - 10.1016/0375-6505(83)90039-1

M3 - Article

VL - 12

SP - 29

EP - 47

JO - Geothermics

JF - Geothermics

SN - 0375-6505

IS - 1

ER -