Permissive tracts, grade and tonnage models, and estimates of numbers of undiscovered deposits for the simulation of undiscovered copper resources
공공데이터포털
This dataset tabulates input data for simulations of undiscovered copper resources in porphyry copper deposits that were done using the EMINERS computer program (Duval, J.S., 2012, Version 3.0 of EMINERS—Economic Mineral Resource Simulator: U.S. Geological Survey Open-File Report 2004–1344, http://pubs.usgs.gov/of/2004/1344) as part of a global mineral resource assessment. The input data consist of information for 163 permissive tracts for porphyry copper deposits in 7 world regions. A GIS of the permissive tracts and selected data are available in Dicken, C.L., Dunlap, Pamela, Parks, H.L., Hammarstrom, J.M., and Zientek, M.L., 2016, Spatial database for a global assessment of undiscovered copper resources: U.S. Geological Survey Scientific Investigations Report 2010–5090–Z, 29 p., and GIS data, available at http://dx.doi.org/10.3133/sir20105090Z. EMINERS input consists of an identifier for each run, estimates of numbers of undiscovered mineral deposits, and selection of an appropriate grade and tonnage model.
Randomized distributions of amounts of copper in undiscovered porphyry copper deposits for 163 permissive tracts
공공데이터포털
This dataset tabulates randomized simulation results for amounts of copper in metric tons in 163 permissive tracts for undiscovered porphyry copper deposits. The data from the child item Simulation results_sorted.csv for each permissive are randomized to allow aggregation of regional and global data using an assumption of statistical independence. This was done by generating a column of 4,999 random numbers and resorting the 4,999 sorted simulations by those random numbers. The randomized distributions for each permissive tract in a region were then summed to compute regional and global totals. For an explanation of aggregation assumptions and underlying mathematics, see Schuenemeyer, J.H., Zientek, M.L, and Box, S.E., 2011, Global mineral resource assessment – Aggregation of estimated numbers of undiscovered deposits – an R-script with an example from the Chu Sarysu Basin, Kazakhstan: U.S. Geological Survey Scientific Investigations Report 2010-5090-B, 13 p., accessed October 10, 2011, at https://pubs.usgs.gov/sir/2010/5090/b/.
Randomized distributions of amounts of copper in undiscovered porphyry copper deposits for 163 permissive tracts
공공데이터포털
This dataset tabulates randomized simulation results for amounts of copper in metric tons in 163 permissive tracts for undiscovered porphyry copper deposits. The data from the child item Simulation results_sorted.csv for each permissive are randomized to allow aggregation of regional and global data using an assumption of statistical independence. This was done by generating a column of 4,999 random numbers and resorting the 4,999 sorted simulations by those random numbers. The randomized distributions for each permissive tract in a region were then summed to compute regional and global totals. For an explanation of aggregation assumptions and underlying mathematics, see Schuenemeyer, J.H., Zientek, M.L, and Box, S.E., 2011, Global mineral resource assessment – Aggregation of estimated numbers of undiscovered deposits – an R-script with an example from the Chu Sarysu Basin, Kazakhstan: U.S. Geological Survey Scientific Investigations Report 2010-5090-B, 13 p., accessed October 10, 2011, at https://pubs.usgs.gov/sir/2010/5090/b/.
A global database of porphyry copper deposits and prospects
공공데이터포털
Porphyry copper deposits are the world's primary source of copper and can also host a variety of secondary commodities identified as critical by the U.S. Geological Survey (U.S. Geological Survey, 2022). These deposits occur primarily along convergent plate margins, and their metal association and geochemical characteristics are reflective of whether the deposit formed in continental/island arc, back-arc, or syn- to post-collisional environments (e.g., Hofstra and others, 2021). Based on this association, understanding the location, age, and endowment of global porphyry deposits can be leveraged to identify prospective regions for discovery of new porphyry deposits along these ancient margins. This data release is a compilation and update from previously published global and regional datasets of porphyry copper deposits and prospects. The data sheet includes deposit names and their location, age (if known, and including analytical method), deposit classification based on Hofstra and others (2021), interpreted tectonic origin, and grade-tonnage compiled from public databases where available. The final spreadsheet represents the most up-to-date published information of global porphyry copper deposits and prospects as of Spring 2024. References Hofstra, A., Lisitsin, V., Corriveau, L., Paradis, S., Peter, J., Lauzière, K., Lawley, C., Gadd, M., Pilote, J., Honsberger, I., Bastrakov, E., Champion, D., Czarnota, K., Doublier, M., Huston, D., Raymond, O., VanDerWielen, S., Emsbo, P., Granitto, M., and Kreiner, D., 2021, Deposit classification scheme for the Critical Minerals Mapping Initiative Global Geochemical Database: U.S. Geological Survey Open-File Report 2021–1049, 60 p., https://doi.org/ 10.3133/ ofr20211049. U.S. Geological Survey, 2022, 2022 Final List of Critical Minerals: Federal Register Document 2022-04027, p. 10381-10382. (available at https://www.federalregister.gov/documents/2022/02/24/2022-04027/2022-final-list-of-critical-minerals).