Hydrothermal alteration of sediments associated with surface emissions from the Cerro Prieto geothermal field

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A study of the mineralogical changes associated with these hydrothermal vents was initiated with the aim of developing possible exploration tools for geothermal resources. The Cerro Prieto reservoir has already been explored by extensive deep drilling so that relationships between surface manifestations and deeper hydrothermal processes could be established directly. Approximately 120 samples of surface sediments were collected both inside and outside of the vents. The mineralogy of the altered sediments studied appears to be controlled by the type of emission. A comparison between the changes in mineralogy due to low temperature hydrothermal activity in the reservoir, seen in samples ... continued below

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140-148

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Valette-Silver, J.N.; Esquer P., I.; Elders, W.A.; Collier, P.C. & Hoagland, J.R. January 1, 1981.

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Description

A study of the mineralogical changes associated with these hydrothermal vents was initiated with the aim of developing possible exploration tools for geothermal resources. The Cerro Prieto reservoir has already been explored by extensive deep drilling so that relationships between surface manifestations and deeper hydrothermal processes could be established directly. Approximately 120 samples of surface sediments were collected both inside and outside of the vents. The mineralogy of the altered sediments studied appears to be controlled by the type of emission. A comparison between the changes in mineralogy due to low temperature hydrothermal activity in the reservoir, seen in samples from boreholes, and mineralogical changes in the surface emission samples shows similar general trends below 180 C: increase of quartz, feldspar and illite, with subsequent disappearance of kaolinite, montmorillonite, calcite and dolomite. These mineral assemblages seem to be characteristic products of the discharge from high intensity geothermal fields.

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140-148

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  • 3. symposium on the Cerro Prieto geothermal field in Baja California, Mexico, San Francisco, CA, USA, Mar 1981

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  • Report No.: LBL-11967
  • Report No.: CONF-810399-10
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 891301
  • Archival Resource Key: ark:/67531/metadc874750

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  • January 1, 1981

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 29, 2016, 1:50 p.m.

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Valette-Silver, J.N.; Esquer P., I.; Elders, W.A.; Collier, P.C. & Hoagland, J.R. Hydrothermal alteration of sediments associated with surface emissions from the Cerro Prieto geothermal field, article, January 1, 1981; United States. (digital.library.unt.edu/ark:/67531/metadc874750/: accessed August 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.