Evaluation of the St. Lucia geothermal resource: geologic, geophysical, and hydrogeochemical investigations Page: 4 of 98
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GEOLOGIC EVALUATION OF THE QUALIBOU CALDERA GEOTHERMAL RESOURCE,
ST. LUCIA, WEST INDIES
A. Oldest Volcanoes Within and Adjacent to the Qualibou
1. Basalt Flows
2. Andesitic Composite Cones (Stratovolcanoes)
3. Andesitic and Dacitic Lavas of Malgretoute,
Rabot, Plaisance, and Fond Doux Ridges
4. The Piton Dacite Domes
5. Domes of Bois d'Inde Franciou
B. The Caldera-Forming Eruption - The Choiseul Pumice
1. Geographic Variations
C. Intracaldera Volcanic Rocks
1. Morne Bonin Dome
2. Terre Blanche
3. Belfond Dacite Dome(s) and Tephra
4. Deposits from the Phreatic Eruption of 1766 A.D.
III. Structural Framework
A. Regional Faults
B. Caldera Faults
C. Slump Faults
D. Discussion of Volcano-Tectonic Relationships
E. Caldera Cross Sections
F. Deep Structure of the Qualibou Caldera
A. Summary of Eruption History in
B. Thermal Regime
the Qualibou Volcanic Field
V. Recommendations for Drilling in the Qualibou Caldera
A. Valley of Sulphur Springs
B. Craters of Belfond
C. Belle Plaine
D. Valley of the Migny River
E. Reservoir Rocks
F. Engineering Problems
Projected Drilling Lithology:
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Ander, M.; Goff, F.; Hanold, B.; Heiken, G.; Vuataz, F. & Wohletz, K. Evaluation of the St. Lucia geothermal resource: geologic, geophysical, and hydrogeochemical investigations, report, August 1, 1984; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1111322/m1/4/: accessed March 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.