Landsat Thematic Mapper (TM) images were analyzed to identify volcanic and structural features and hydrothermally altered rocks in the Neogene-Quaternary volcanic field near Berenguela, western Bolivia, Esperanza, in the Maricurga district of northern Chile, and in the vicinity of the Orcopampa mine in 1 southem Peru. These areas were being investigated for the presence of epithermal precious-metal deposits. Four TM image quadrants were processed for each country, and the resulting enhanced black-and-white single-band images, false-color composite (FCC) images, and color-ratio composite 1 (CRC) images were printed at either 1:200,000- or 1:250,000-scale. In addition, a selected CRC image, which was designed for delineating hydrothermally altered rocks, was printed at 1:50,000-scale. A correction for atmospheric scattering was applied to most images, and snow and water were eliminated 1 f...

Contenido: Panorama de los depósitos minerales de las regiones de Berenguela y Laurani. A. Marco geológico de la región de Berenguela, B. Cronología y análisis estructural de las rocas Cenozoicas en la región de Berenguela, C. Evaluación del potencial minero de los centros volcánicos del Mioceno superior de la región Berenguela, D. Geología del prospecto La Española, E. Estudio geológico minero del prospecto Dos Amigos, distrito de Berenguela, F. Geología del porspecto Tatito Kkollu, G. Marco geológico del distrito minero Laurani, H. Geología, alteración y mineralización del deposito mineral tipo sulfato-acido de Laurani, altiplano norte de Bolivia.