Gorda Ridge pp 143-152 | Cite as

Economic Perspective on Development of Potential Gorda Ridge Sulfide Deposits

  • Joseph L. Ritchey
  • Nicholas Wetzel
  • Scott A. Stebbins
  • Benjamin W. Haynes
Conference paper


The Turner-Albright massive sulfide deposit is a well-studied example of a polymetallic ore body formed at a site of seafloor spreading in the geologic past. Construction and evaluation of a hypothetical mining and processing scenario based on this deposit, including cost estimates and financial analyses, identified key economic parameters that provide an economic perspective for future development of potential massive sulfide deposits on Gorda Ridge. Sensitivity analyses of cost parameters indicate that profitability is most sensitive to increases in operating costs. Both capital and operating costs are expected to be substantially higher for seafloor mining operations, thus requiring increased revenues to reach economic viability. Consequently, near-term development of massive sulfide deposits on or beneath the seafloor appears unlikely. New developments in exploration and mining technology are needed to locate, delineate, and develop seafloor deposits before an accurate quantitative assessment of economic viability can be made.


Massive Sulfide Sulfide Deposit Seafloor Spreading Massive Sulfide Deposit Gold Recovery 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Engineering and Mining Journal (1981) Sherritt commercializes zinc pressure leaching. Eng Mining J 182:76–79.Google Scholar
  2. Koski RA, Derkey RE (1981) Massive sulfide deposits in oceanic-crust and island-arc terranes of southwestern Oregon. Ore Geol 43:119–125.Google Scholar
  3. Koski RA, Shanks WC III, Bohrson WA, Oscarson RL (1988) The composition of massive sulfide deposits from the sediment-covered floor of Escanaba Trough, Gorda Ridge: Implications for depositional processes. Can Mineral 26:655–673.Google Scholar
  4. Scott SD (1985) Seafloor polymetallic sulfide deposits: Modern and ancient. Marine Mining 5: 191–212.Google Scholar
  5. Strickler MD (1986) Geologic setting of the Turner-Albright massive sulfide deposit, Josephine County, Oregon. Ore Geol 48:115–122.Google Scholar
  6. U.S. Bureau of Mines (1987a) Cost Estimating System Handbook, Part 1. Surface and Underground Mining. Information Circular 9142, 631 pp.Google Scholar
  7. U.S. Bureau of Mines (1987b) Cost Estimating System Handbook, Part 2. Mineral Processing. Information Circular 9143, 566 pp.Google Scholar

Copyright information

© Springer-Verlag New York Inc. 1990

Authors and Affiliations

  • Joseph L. Ritchey
  • Nicholas Wetzel
  • Scott A. Stebbins
  • Benjamin W. Haynes

There are no affiliations available

Personalised recommendations