Assessment of geothermal resources at Newcastle, Utah

Robert E. Blackett, Michael A. Shubat, David S. Chapman, Craig B. Forster, Charles M Schlinger

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Integrated geology, geophysics, and geochemistry studies in the Newcastle area of southwest Utah are used to develop a conceptual geologic model of a blind, moderate-temperature hydrothermal system. Studies using 12 existing and 12 new, thermal gradient test holes, in addition to geologic mapping, gravity surveys, and other investigations have helped define the thermal regime. Preliminary results indicate that the up-flow region is located near the west-facing escarpment of an adjacent mountain range, probably related to the bounding range-front fault. Chemical geothermometers suggest equilibration temperatures ranging from 140°C to 170°C. The highest temperature recorded in the system is 130°C from an exploration well drilled by the Unocal Corporation.

Original languageEnglish (US)
Title of host publicationTransactions - Geothermal Resources Council
PublisherPubl by Geothermal Resources Council
Number of pages8
StatePublished - 1989
Externally publishedYes
EventGeysers - Three Decades of Achievement: A Window on the Future - Santa Rosa, CA, USA
Duration: Oct 1 1989Oct 4 1989


OtherGeysers - Three Decades of Achievement: A Window on the Future
CitySanta Rosa, CA, USA


ASJC Scopus subject areas

  • Geology
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Blackett, R. E., Shubat, M. A., Chapman, D. S., Forster, C. B., & Schlinger, C. M. (1989). Assessment of geothermal resources at Newcastle, Utah. In Transactions - Geothermal Resources Council (Vol. 13, pp. 109-116). Publ by Geothermal Resources Council.