Evaluation of the Geothermal Potential in the Rio Grande Rift: Truth or Consequences, New Mexico

In this article, we evaluate the geothermal potential of the city of Truth or Consequences. Truth or Consequences is located in Sierra County in the Palomas Basin and is famous for its hot mineral springs and baths which use geothermal waters with temperatures ranging from 104 to 110°F. The evaluation examined the existing literature and data and includes a discussion on the geology, tectonics, structure, geothermal resources, water resources and existing infrastructure of the site with respect to geothermal development. The geothermal resources at Truth or Consequences are relatively shallow and, based on a calculated geothermal gradient of 1.9 to 2.5°F/100ft, the 194°F isotherm would be expected to be encountered at depths between (5250 and 6890 ft). Hotter temperatures could be encountered at shallower depths if flow paths where hot water is flowing to the surface can be intercepted. Hillsboro Warm Springs is located approximately 30 miles southwest of Truth or Consequences and has estimated resource temperatures in the range of 250-300°F. Based on these temperatures a binary power plant is feasible at Hillsboro Warm Springs. Cooling water is available from the Elephant Butte and Caballo reservoirs. The artesian wells in and around the region are primarily used for irrigation and domestic purposes. These wells can potentially be used as a source for cooling water. However, due to low flow rates, these wells may be unable to provide adequate amounts of water for both domestic and cooling purposes. Greenhouses, aquaculture, agriculture and district heating are other potential uses of the geothermal resources in the region.