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  3. Semiquantitative mineralogy results from powder X-ray diffraction (XRD) analyses of mineral scales from The Geysers geothermal field, California, USA

Semiquantitative mineralogy results from powder X-ray diffraction (XRD) analyses of mineral scales from The Geysers geothermal field, California, USA

Dates

Publication Date
Start Date
2017-07-01
End Date
2021-12-13

Citation

Guzman, M.A., Mauk, J.L., and Benzel, W.M., 2024, Semiquantitative mineralogy results from powder X-ray diffraction (XRD) analyses of mineral scales from The Geysers geothermal field, California, USA: U.S. Geological Survey data release, https://doi.org/10.5066/P9MQVHD2.

Summary

This data release provides semiquantitative mineralogy results from X-ray diffraction (XRD) analyses of mineral scales from The Geysers vapor-dominated geothermal field in California. The mineral species and their abundances are reported in weight percent and values have been normalized to total 100 percent for each sample. The X-ray diffraction results show that the mineral samples from the wellheads are primarily composed of ammonium (NH4+) sulfate minerals and sassolite B(OH)3, whereas sulfide minerals such as cinnabar and pyrite are the most abundant minerals observed in the power plants. Mineral scales vary along the steam flow path, from the wellhead to power plants. Relatively abundant iron oxide and iron hydroxide minerals [...]

Contacts

Point of Contact :
Mario A. Guzman
Originator :
Mario A. Guzman, Jeffrey L Mauk, William M Benzel
Metadata Contact :
Mario A. Guzman, GS GGGSC DM Team
Publisher :
U.S. Geological Survey
USGS Program :
Mineral Resources Program
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Geology, Geophysics, and Geochemistry Science Center
USGS Mission Area :
Energy and Minerals

Attached Files

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Geysers_XRD_Mineralogy.xml
Original FGDC Metadata
View 		35.03 KB application/fgdc+xml
Geysers_DataDictionary_XRD_Mineralogy.csv 8.47 KB text/csv
Geysers_XRD_Data.csv 3.26 MB text/csv
Geysers_XRD_SemiQuant_Mineralogy_Table.csv 7.51 KB text/csv
Geysers_Spatial_Coordinates.csv 980 Bytes text/csv
Shapefile: Geysers_Spatial_Coordinates.zip
Geysers_Spatial_Coordinates.cpg 5 Bytes
Geysers_Spatial_Coordinates.dbf 128.09 KB
Geysers_Spatial_Coordinates.prj 167 Bytes
Geysers_Spatial_Coordinates.sbn 332 Bytes
Geysers_Spatial_Coordinates.sbx 124 Bytes
Geysers_Spatial_Coordinates.shp 744 Bytes
Geysers_Spatial_Coordinates.shx 284 Bytes

Purpose

The Geysers geothermal field in northern California is the largest geothermal field in the world, and an important example of a vapor-dominated reservoir. Globally, there have been very few complete mineralogical and geochemical studies of mineral scales from vapor-dominated geothermal systems. This dataset is part of an effort to characterize the mineralogical compositions of scales along the steam flow path and to examine the affects of reservoir fluid chemistry on mineral deposition. The mineralogical data from The Geysers help provide insights into mineral scale deposition at other operating vapor-dominated geothermal systems.

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  • USGS Geology, Geophysics, and Geochemistry Science Center

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Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P9MQVHD2

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