Graham W. Lederer, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 14
MapMark4 Shiny: A self-contained implementation of the MapMark4 R package MapMark4 Shiny: A self-contained implementation of the MapMark4 R package
MapMark4 Shiny is a self-contained R Shiny app designed for quantitative mineral resource assessments. The target audience consists of practitioners of the three-part mineral resource assessment methodology (Singer and Menzie, 2010). The app performs calculations needed to combine information from grade-tonnage models with estimates of undiscovered deposits within permissive tracts. The...
Tungsten skarn mineral resource assessment of the Great Basin region of western Nevada and eastern California - Simulation results Tungsten skarn mineral resource assessment of the Great Basin region of western Nevada and eastern California - Simulation results
The dataset consists of the input data, parameters, and results output from mineral resource assessment calculations.
Filter Total Items: 19
Grade and tonnage model for tungsten skarn deposits—2020 update Grade and tonnage model for tungsten skarn deposits—2020 update
This report presents an updated grade and tonnage model for tungsten skarn deposits. As a critical component of the U.S. Geological Survey’s three-part form of quantitative mineral resource assessment, robust grade and tonnage models are essential to transforming mineral resource assessments into effective tools for decision makers. Using the best data available at the time of...
Authors
Carlin J. Green, Graham W. Lederer, Heather L. Parks, Michael L. Zientek
Evaluating the mineral commodity supply risk of the U.S. manufacturing sector Evaluating the mineral commodity supply risk of the U.S. manufacturing sector
Trade tensions, resource nationalism, and various other factors are increasing concerns regarding the supply reliability of nonfuel mineral commodities. This is especially the case for commodities required for new and emerging technologies ranging from electric vehicles to wind turbines. In this analysis, we utilize a conventional risk-modeling framework to develop and apply a new...
Authors
Nedal T. Nassar, Jamie Brainard, Andrew L. Gulley, Ross Manley, Grecia R. Matos, Graham W. Lederer, Laurence Bird, David G. Pineault, Elisa Alonso, Joseph Gambogi, Steven M. Fortier
Meeting the mineral needs of the United States Meeting the mineral needs of the United States
A recent report points out where the United States is most dependent on mineral imports and highlights some ways for reducing this dependence.
Authors
Graham W. Lederer, Erin McCullough
Draft critical mineral list—Summary of methodology and background information—U.S. Geological Survey technical input document in response to Secretarial Order No. 3359 Draft critical mineral list—Summary of methodology and background information—U.S. Geological Survey technical input document in response to Secretarial Order No. 3359
Pursuant to the Presidential Executive Order (EO) No. 13817, “A Federal Strategy to Ensure Secure and Reliable Supplies of Critical Minerals,” the Secretary of the Interior, in coordination with the Secretary of Defense, and in consultation with the heads of other relevant executive departments and agencies, was tasked with developing and submitting a draft list of minerals defined as...
Authors
Steven M. Fortier, Nedal T. Nassar, Graham W. Lederer, Jamie Brainard, Joseph Gambogi, Erin A. McCullough
Beryllium—A critical mineral commodity—Resources, production, and supply chain Beryllium—A critical mineral commodity—Resources, production, and supply chain
Beryllium is a lightweight metallic element used in a wide variety of specialty and industrial applications. As a function of its unique chemical and physical properties, such as a high stiffness-to-weight ratio, resistance to temperature extremes, and high thermal conductivity, beryllium cannot be easily replaced by substitute materials in applications where combinations of these...
Authors
Graham W. Lederer, Nora K. Foley, Brian W. Jaskula, Robert A. Ayuso
Resource nationalism in Indonesia—Effects of the 2014 mineral export ban Resource nationalism in Indonesia—Effects of the 2014 mineral export ban
Resource nationalism encompasses a broad range of political and economic actions taken by Governments to regulate the extraction of natural resources within their borders. Policies such as increased tariffs or export restrictions can have far-reaching economic effects on international trade. As the Governments of several developing countries consider enacting nationalistic policies, an...
Authors
Graham W. Lederer
Recent trends in the nonfuel minerals industry of Iran Recent trends in the nonfuel minerals industry of Iran
Summary In response to the recent removal of international sanctions on Iran, including the lifting of “secondary” sanctions by the United States on investment into and trade with Iran, the U.S. Geological Survey National Minerals Information Center compiled and analyzed available information on the current state of Iran’s nonfuel minerals industry. This Circular features a new map and...
Authors
Sinan Hastorun, Karine M. Renaud, Graham W. Lederer
Non-USGS Publications**
Cottle, J., Lederer, G., and Larson, K., 2019, The monazite record of pluton assembly: Mapping Manaslu using petrochronology: Chemical Geology, v. 530, p. 119309.
Langille, J.M., Jessup, M.J., Cottle, J.M., Lederer, G., and Ahmad, T., 2012, Timing of metamorphism, melting and exhumation of the Leo Pargil dome, northwest India: Journal of Metamorphic Geology, v. 30, no. 8, p. 769–791.
Larson, K., Cottle, J., Lederer, G., and Rai, S.M., 2017, Defining shear zone boundaries using fabric intensity gradients: An example from the east-central Nepal Himalaya: Geosphere, v. 13, no. 3, p. 771–781.
Larson, K.P., Kellett, D.A., Cottle, J.M., King, J., Lederer, G., and Rai, S.M., 2016, Anatexis, cooling, and kinematics during orogenesis: Miocene development of the Himalayan metamorphic core, east-central Nepal: Geosphere, v. 12, no. 5, p. 1575–1593.
Lederer, G.W., Cottle, J.M., Jessup, M.J., Langille, J.M., and Ahmad, T., 2013, Timescales of partial melting in the Himalayan middle crust: insight from the Leo Pargil dome, northwest India: Contributions to Mineralogy and Petrology, v. 166, no. 5, p. 1415–1441.
McKinney, S.T., Cottle, J.M., and Lederer, G.W., 2015, Evaluating rare earth element (REE) mineralization mechanisms in Proterozoic gneiss, Music Valley, California: Geological Society of America Bulletin, v. 127, no. 7/8, p. 1135–1152.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 14
MapMark4 Shiny: A self-contained implementation of the MapMark4 R package MapMark4 Shiny: A self-contained implementation of the MapMark4 R package
MapMark4 Shiny is a self-contained R Shiny app designed for quantitative mineral resource assessments. The target audience consists of practitioners of the three-part mineral resource assessment methodology (Singer and Menzie, 2010). The app performs calculations needed to combine information from grade-tonnage models with estimates of undiscovered deposits within permissive tracts. The...
Tungsten skarn mineral resource assessment of the Great Basin region of western Nevada and eastern California - Simulation results Tungsten skarn mineral resource assessment of the Great Basin region of western Nevada and eastern California - Simulation results
The dataset consists of the input data, parameters, and results output from mineral resource assessment calculations.
Filter Total Items: 19
Grade and tonnage model for tungsten skarn deposits—2020 update Grade and tonnage model for tungsten skarn deposits—2020 update
This report presents an updated grade and tonnage model for tungsten skarn deposits. As a critical component of the U.S. Geological Survey’s three-part form of quantitative mineral resource assessment, robust grade and tonnage models are essential to transforming mineral resource assessments into effective tools for decision makers. Using the best data available at the time of...
Authors
Carlin J. Green, Graham W. Lederer, Heather L. Parks, Michael L. Zientek
Evaluating the mineral commodity supply risk of the U.S. manufacturing sector Evaluating the mineral commodity supply risk of the U.S. manufacturing sector
Trade tensions, resource nationalism, and various other factors are increasing concerns regarding the supply reliability of nonfuel mineral commodities. This is especially the case for commodities required for new and emerging technologies ranging from electric vehicles to wind turbines. In this analysis, we utilize a conventional risk-modeling framework to develop and apply a new...
Authors
Nedal T. Nassar, Jamie Brainard, Andrew L. Gulley, Ross Manley, Grecia R. Matos, Graham W. Lederer, Laurence Bird, David G. Pineault, Elisa Alonso, Joseph Gambogi, Steven M. Fortier
Meeting the mineral needs of the United States Meeting the mineral needs of the United States
A recent report points out where the United States is most dependent on mineral imports and highlights some ways for reducing this dependence.
Authors
Graham W. Lederer, Erin McCullough
Draft critical mineral list—Summary of methodology and background information—U.S. Geological Survey technical input document in response to Secretarial Order No. 3359 Draft critical mineral list—Summary of methodology and background information—U.S. Geological Survey technical input document in response to Secretarial Order No. 3359
Pursuant to the Presidential Executive Order (EO) No. 13817, “A Federal Strategy to Ensure Secure and Reliable Supplies of Critical Minerals,” the Secretary of the Interior, in coordination with the Secretary of Defense, and in consultation with the heads of other relevant executive departments and agencies, was tasked with developing and submitting a draft list of minerals defined as...
Authors
Steven M. Fortier, Nedal T. Nassar, Graham W. Lederer, Jamie Brainard, Joseph Gambogi, Erin A. McCullough
Beryllium—A critical mineral commodity—Resources, production, and supply chain Beryllium—A critical mineral commodity—Resources, production, and supply chain
Beryllium is a lightweight metallic element used in a wide variety of specialty and industrial applications. As a function of its unique chemical and physical properties, such as a high stiffness-to-weight ratio, resistance to temperature extremes, and high thermal conductivity, beryllium cannot be easily replaced by substitute materials in applications where combinations of these...
Authors
Graham W. Lederer, Nora K. Foley, Brian W. Jaskula, Robert A. Ayuso
Resource nationalism in Indonesia—Effects of the 2014 mineral export ban Resource nationalism in Indonesia—Effects of the 2014 mineral export ban
Resource nationalism encompasses a broad range of political and economic actions taken by Governments to regulate the extraction of natural resources within their borders. Policies such as increased tariffs or export restrictions can have far-reaching economic effects on international trade. As the Governments of several developing countries consider enacting nationalistic policies, an...
Authors
Graham W. Lederer
Recent trends in the nonfuel minerals industry of Iran Recent trends in the nonfuel minerals industry of Iran
Summary In response to the recent removal of international sanctions on Iran, including the lifting of “secondary” sanctions by the United States on investment into and trade with Iran, the U.S. Geological Survey National Minerals Information Center compiled and analyzed available information on the current state of Iran’s nonfuel minerals industry. This Circular features a new map and...
Authors
Sinan Hastorun, Karine M. Renaud, Graham W. Lederer
Non-USGS Publications**
Cottle, J., Lederer, G., and Larson, K., 2019, The monazite record of pluton assembly: Mapping Manaslu using petrochronology: Chemical Geology, v. 530, p. 119309.
Langille, J.M., Jessup, M.J., Cottle, J.M., Lederer, G., and Ahmad, T., 2012, Timing of metamorphism, melting and exhumation of the Leo Pargil dome, northwest India: Journal of Metamorphic Geology, v. 30, no. 8, p. 769–791.
Larson, K., Cottle, J., Lederer, G., and Rai, S.M., 2017, Defining shear zone boundaries using fabric intensity gradients: An example from the east-central Nepal Himalaya: Geosphere, v. 13, no. 3, p. 771–781.
Larson, K.P., Kellett, D.A., Cottle, J.M., King, J., Lederer, G., and Rai, S.M., 2016, Anatexis, cooling, and kinematics during orogenesis: Miocene development of the Himalayan metamorphic core, east-central Nepal: Geosphere, v. 12, no. 5, p. 1575–1593.
Lederer, G.W., Cottle, J.M., Jessup, M.J., Langille, J.M., and Ahmad, T., 2013, Timescales of partial melting in the Himalayan middle crust: insight from the Leo Pargil dome, northwest India: Contributions to Mineralogy and Petrology, v. 166, no. 5, p. 1415–1441.
McKinney, S.T., Cottle, J.M., and Lederer, G.W., 2015, Evaluating rare earth element (REE) mineralization mechanisms in Proterozoic gneiss, Music Valley, California: Geological Society of America Bulletin, v. 127, no. 7/8, p. 1135–1152.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.