Tecuamburro Volcano, Guatemala Geothermal Gradient Core Hole Drilling, Operations, and Preliminary Results
- Key words
- Exploration; Drilling; Guatemala; Tecuamburro; Volcanics; Age Dating; Hot Springs; Temperature Gradient; Diamond Core Drilling; Crater; Tuff Ring; Hydrothermal Breccia; Phreatic
- Location
- Tecuamburro, Guatemala
- Conference
- Geothermal Resources Council Transactions
- Year
- 1990
- Session
- Exploration; Drilling; Core sampling; Volcanism; Well loggin
- Language
- English
Abstract
A geothermal gradient core hole (TCB-1) was drilled to a depth of 700+ m at the Tecuamburro geothermal site, Guatemala during February and March , 1990. The core hole is located low on the northern flank of the Tecuamburro Volcano complex. Very preliminary analysis of cores (>95% core recovery) suggest that the hydrothermal system may be located in the 4 km diameter Chupadero Crater, which has been proposed as the source of pyroxene pumice deposits in the Tecuamburro area. TCB-1 is located 300 m south of a 300 m diameter phreatic crater, Laguna Ixpaco; the core hole may penetrate the thin edge of a tuff ring surrounding Ixpaco and zones of hydrothermal brecciation within the upper 150 m may be related to the phreatic blast, dated at 2,910 14C years. At the time of this writing, the unequilibrated temperature at a depth of 570 m was 180°C. Data on fracturing, permeability, hydrothermal alteration, and temperature will be presented.
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