Hydrothermal alteration and main structures mapping using TM images in La Primavera geothermal field (Mexico)
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional Autónoma de México
2001
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| _version_ | 1876477051866710016 |
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| author | T. Fernández de la Vega Márquez |
| author_facet | T. Fernández de la Vega Márquez |
| contents | Hydrothermal alteration and main structures mapping using TM images in La Primavera geothermal field (Mexico) T. Fernández de la Vega Márquez G. Orozco Rosa María Prol Ledesma Ciencias de la Tierra Mexico TM images Geothermal alteration remote sensing Landsat TM images of the La Primavera geothermal field area were used to identify the main structures within the field, andto locate areas that show hydrothermal alteration. The methods used in the processing of the images include univariate andmultivariate statistical analysis, spectral and spatial enhancement. Vegetation in the area is not composed by wide leaf plants;however, there is interference between the spectra of vegetation and hydrothermal alteration. In order to overcome this interference,the Crosta technique and the Loughlin method were used (Crosta and Moore 1989; Loughlin 1991). As a result, iron oxidesand hydroxyl minerals were detected in the area. The resulting images were displayed in gray tones and false color composites toenhance main structures and the altered rocks respectively.The identified alteration zones were correlated with the discharged flows from the geothermal reservoir, and with the mainstructures that control the permeability of the reservoir and the cap rock; therefore, locating hydrothermally altered rocks in thesurface will help to determine the presence of upflows from the geothermal reservoir. 2001 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56840301 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.40 |
| format | Artículo científico |
| id | redalyc_56840301 |
| institution | Redalyc |
| language | en |
| publishDate | 2001 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Hydrothermal alteration and main structures mapping using TM images in La Primavera geothermal field (Mexico) T. Fernández de la Vega Márquez Ciencias de la Tierra Mexico TM images Geothermal alteration remote sensing Hydrothermal alteration and main structures mapping using TM images in La Primavera geothermal field (Mexico) T. Fernández de la Vega Márquez G. Orozco Rosa María Prol Ledesma Ciencias de la Tierra Mexico TM images Geothermal alteration remote sensing Landsat TM images of the La Primavera geothermal field area were used to identify the main structures within the field, andto locate areas that show hydrothermal alteration. The methods used in the processing of the images include univariate andmultivariate statistical analysis, spectral and spatial enhancement. Vegetation in the area is not composed by wide leaf plants;however, there is interference between the spectra of vegetation and hydrothermal alteration. In order to overcome this interference,the Crosta technique and the Loughlin method were used (Crosta and Moore 1989; Loughlin 1991). As a result, iron oxidesand hydroxyl minerals were detected in the area. The resulting images were displayed in gray tones and false color composites toenhance main structures and the altered rocks respectively.The identified alteration zones were correlated with the discharged flows from the geothermal reservoir, and with the mainstructures that control the permeability of the reservoir and the cap rock; therefore, locating hydrothermally altered rocks in thesurface will help to determine the presence of upflows from the geothermal reservoir. 2001 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56840301 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.40 |
| title | Hydrothermal alteration and main structures mapping using TM images in La Primavera geothermal field (Mexico) |
| topic | Ciencias de la Tierra Mexico TM images Geothermal alteration remote sensing |
| url | https://www.redalyc.org/articulo.oa?id=56840301 |