Strategic and Critical Minerals Assessment Project

The goals of this 3-year project are (1) to compile historic and industry-donated data in digital format; (2) to obtain new field and analytical data critical for assessing Alaska's REE potential; (3) to evaluate the historic and new data to identify areas of Alaska with the highest REE potential, as well as those needing additional geologic evaluation; (4) to communicate the results of our work to the public; and (5) to publish the data and results of our studies on the DGGS website.

Below is a list of publications related to Strategic and Critical Minerals Assessment Project. Select a publication number to access more detailed information and their respective files available for download.

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RDF 2017-1 Report Geospatial Data
Benowitz, J.A., Layer, P.W., Wypych, Alicja, and Twelker, Evan, 2017, 40Ar/39Ar data from rocks collected in the 2015 Wrangellia mineral assessment project area, Mount Hayes A-5, Mount Hayes B-6, and Talkeetna Mountains D-2 quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2017-1, 9 p. http://doi.org/10.14509/29699
RDF 2016-12 Report Geospatial Data
Reioux, D.A., Werdon, M.B., Seitz, S.S., and Mulliken, K.M., 2016, Digital compilation of geochemical data for historical samples from occurrences of strategic and critical elements in Alaska: Part II - Platinum group elements (PGE): Alaska Division of Geological & Geophysical Surveys Raw Data File 2016-12, 2 p. http://doi.org/10.14509/29474
RDF 2016-11 Report Geospatial Data
Blessington, M.J., Werdon, M.B., Seitz, S.S., and Mulliken, K.M., 2016, Digital compilation of geochemical data for historical samples from occurrences of strategic and critical elements in Alaska: Part I - Rare-earth elements (REE): Alaska Division of Geological & Geophysical Surveys Raw Data File 2016-11, 4 p. http://doi.org/10.14509/29473
RDF 2016-8 Report Geospatial Data
Twelker, Evan, and O'Sullivan, P.B., 2016, U-Pb zircon age data from meta-igneous rocks in the Clearwater Mountains, Mount Hayes A-6 Quadrangle, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2016-8, 17 p. http://doi.org/10.14509/29663
RDF 2016-7 Report Geospatial Data
Tuzzolino, A.L., O'Sullivan, P.B., Freeman, L.K., and Newberry, R.J., 2016, Zircon U-Pb age data, Ray Mountains area, Bettles Quadrangle, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2016-7, 19 p. http://doi.org/10.14509/29662
RDF 2015-17 Report Geospatial Data
Werdon, M.B., 2015, Geochemical analyses of rock samples from the Tonsina area, Valdez Quadrangle, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2015-17, 3 p. http://doi.org/10.14509/29519
Wypych, Alicja and others, 2015 Map
Wypych, Alicja, Twelker, Evan, Lande, L.L., and Newberry, R.J., 2015, Along-strike geochemical variations in the Late Triassic Nikolai magmatic system, Wrangellia, central Alaska (poster number V31D-3059): American Geophysical Union 2015 Fall Meeting, December 14-18, 2015: Alaska Division of Geological & Geophysical Surveys, 1 sheet. http://doi.org/10.14509/29567
Twelker, Evan and Lande, Lauren, 2015 Report
Twelker, Evan, and Lande, Lauren, 2015, DGGS geological investigations in western Wrangellia (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 1-5, 2015: Alaska Division of Geological & Geophysical Surveys, 45 p. http://doi.org/10.14509/29531
RDF 2015-16 Report Geospatial Data
Wypych, Alicja, Twelker, Evan, Freeman, L.K., Lande, Lauren, Newberry, R.J., Reioux, D.A., and Sicard, K.R., 2015, Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Wrangellia mineral assessment area, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2015-16, 4 p. http://doi.org/10.14509/29518
RDF 2015-4 Report Geospatial Data
Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Inmachuk, Kugruk, Kiwalik, and Koyuk River drainages, Granite Mountain, and the northern Darby Mountains, Bendeleben, Candle, Kotzebue, and Solomon quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2015-4, 5 p. http://doi.org/10.14509/29448
RDF 2015-5 Report Geospatial Data
Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Haines area, Juneau and Skagway quadrangles, southeast Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2015-5, 5 p. http://doi.org/10.14509/29449
RDF 2015-6 Report Geospatial Data
Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Kougarok area, Bendeleben and Teller quadrangles, Seward Peninsula, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2015-6, 5 p. http://doi.org/10.14509/29450
RDF 2015-7 Report Geospatial Data
Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the northeastern Alaska Range, Healy, Mount Hayes, Nabesna, and Tanacross quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2015-7, 6 p. http://doi.org/10.14509/29451
RDF 2015-8 Report Geospatial Data
Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Tonsina area, Valdez Quadrangle, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2015-8, 5 p. http://doi.org/10.14509/29452
RDF 2015-9 Report Geospatial Data
Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Zane Hills, Hughes and Shungnak quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2015-9, 5 p. http://doi.org/10.14509/29453
RDF 2015-10 Report Geospatial Data
Benowitz, J.A., Layer, P.W., Wypych, Alicja, and Twelker, Evan, 2015, 40Ar/39Ar data from the Talkeetna Mountains C-4 Quadrangle and adjoining areas, central Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2015-10, 19 p. http://doi.org/10.14509/29454
GPR 2014-4 Map Geospatial Data
CGG, and Fugro GeoServices, Inc., 2015, Farewell and Middle Styx survey areas: Project report, interpretation maps, EM anomalies, stacked multi-channel profiles, and other products of the airborne geophysical surveys, parts of the McGrath, Lime Hills, and Tyonek quadrangles, south-central Alaska: Alaska Division of Geological & Geophysical Surveys Geophysical Report 2014-4, 22 sheets. http://doi.org/10.14509/29349
OF 2015-1021 Report Map Outside Link
Jones, J.V., III, Karl, S.M., Labay, K.A., Shew, N.B., Granitto, M., Hayes, T.S., Mauk, J.L., Schmidt, J.M., Todd, E., Wang, B., Werdon, M.B., and Yager, D.B., 2015, GIS-based identification of areas with mineral resource potential for six selected deposit groups, Bureau of Land Management Central Yukon Planning Area, Alaska: U.S. Geological Survey Open-File Report 2015-1021, 78 p., 12 sheets.
Sicard, K.R. and others, 2014 Report
Sicard, K.R., Twelker, Evan, Freeman, L.K., Wypych, Alicja, Newberry, R.J., Benowitz, J.A., and Kass, M.A., 2014, Cretaceous to Tertiary magmatism and associated mineralization in the Lime Hills C-1 Quadrangle, western Alaska Range (presentation): Alaska Miners Association Annual Conference, November 3-9, 2014, Anchorage, Alaska: Alaska Division of Geological & Geophysical Surveys, 25 p. http://doi.org/10.14509/29163
Twelker, Evan and others, 2014 Report
Twelker, Evan, Wypych, Alicja, Sicard, K.R., Newberry, R.J., Freeman, L.K., Reioux, D.A., and Lande, Lauren, 2014, Preliminary results from 2014 geologic mapping in the Talkeetna Mountains, Alaska (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 3-9, 2014: Alaska Division of Geological & Geophysical Surveys, 28 p. http://doi.org/10.14509/29160
RDF 2014-5 Report Geospatial Data
Werdon, M.B., Azain, J.S., and Granitto, Matthew, 2014, Reanalysis of historical U.S. Geological Survey sediment samples for geochemical data from the western part of the Wrangellia terrane, Anchorage, Gulkana, Healy, Mt. Hayes, Nabesna, and Talkeetna Mountains quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-5, 6 p. http://doi.org/10.14509/27287
RDF 2014-22 Report Geospatial Data
Wypych, Alicja, Twelker, Evan, Freeman, L.K., Lande, Lauren, Newberry, R.J., Reioux, D.A., and Sicard, K.R., 2014, Major-oxide and trace-element geochemical data from rocks collected in 2014 in the Wrangellia mineral assessment area, Talkeetna Mountains C-4, C-3, and B-4 quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-22, 4 p. http://doi.org/10.14509/29140
RDF 2014-19 Report Geospatial Data
Tuzzolino, A.L., Newberry, R.J., Benowitz, J.A., Layer, P.W., and Freeman, L.K., 2014, 40Ar/39Ar data, Ray Mountains area, Bettles Quadrangle, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-19, 12 p. http://doi.org/10.14509/29124
Twelker, Evan and others, 2014 Map
Twelker, Evan, Wypych, Alicja, and Newberry, R.J., 2014, New data and insight on the Late Triassic Wrangellia magmatic Ni-Cu-Co-PGE system in the Talkeetna Mountains, central Alaska (poster): Society of Economic Geologists 2014 Conference, September 27-30, 2014: Alaska Division of Geological & Geophysical Surveys, 1 sheet. http://doi.org/10.14509/29139
RDF 2014-18 Report Geospatial Data
Benowitz, J.A., Layer, P.W., and Twelker, Evan, 2014, 40Ar/39Ar data from rocks collected in 2013 in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-18, 10 p. http://doi.org/10.14509/29119
RDF 2014-17 Report Geospatial Data
Tuzzolino, A.L., Freeman, L.K., and Newberry, R.J., 2014, Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rock samples collected in 2013 in the Ray Mountains area, Bettles A-1 and A-6 quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-17, 3 p. http://doi.org/10.14509/27325
RDF 2014-15 Report Geospatial Data
Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from Kook Lake, Sitka Quadrangle, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-15, 4 p. http://doi.org/10.14509/27300
RDF 2014-14 Report Geospatial Data
Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the VABM Bend area, Charley River and Eagle quadrangles, east-central Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-14, 4 p. http://doi.org/10.14509/27299
RDF 2014-13 Report Geospatial Data
Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Porcupine River drainage, northeastern Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-13, 4 p. http://doi.org/10.14509/27298
RDF 2014-11 Report Geospatial Data
Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Zane Hills pluton, northwestern Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-11, 4 p. http://doi.org/10.14509/27296
RDF 2014-10 Report Geospatial Data
Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Selawik Hills, northwestern Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-10, 4 p. http://doi.org/10.14509/27295
RDF 2014-9 Report Geospatial Data
Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Darby Mountains, Seward Peninsula, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-9, 4 p. http://doi.org/10.14509/27294
RDF 2014-8 Report Geospatial Data
Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from tin occurrences associated with the Ohio Creek pluton, south-central Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-8, 4 p. http://doi.org/10.14509/27293
RDF 2014-7 Report Geospatial Data
Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Circle mining district, western Crazy Mountains, and the Lime Peak area of the White Mountains, Circle Quadrangle, east-central Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-7, 4 p. http://doi.org/10.14509/27292
RDF 2014-6 Report Geospatial Data
Sicard, K.R., Wypych, Alicja, Twelker, Evan, Bachmann, E.N., Freeman, L.K., Newberry, R.J., Reioux, D.A., Tuzzolino, A.L., and Wright, T.C., 2014, Major-oxide, minor-oxide, and trace-element geochemical data from rocks in the Styx River area, Lime Hills C-1 Quadrangle, Lime Hills, McGrath, Talkeetna, and Tyonek quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-6, 4 p. http://doi.org/10.14509/27289
RDF 2014-12 Report Geospatial Data
Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Ray River watershed, and Kanuti and Hodzana rivers uplands, central Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-12, 4 p. http://doi.org/10.14509/27297
RDF 2014-3 Report Geospatial Data
Twelker, Evan, Bachmann, E.N., Freeman, L.K., Newberry, R.J., Reioux, D.A., Sicard, K.R., Tuzzolino, A.L., Wright, T.C., and Wypych, Alicja, 2014, Major-oxide, minor-oxide, and trace-element geochemical data from rocks and stream sediments in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-3, 6 p. http://doi.org/10.14509/27181
Twelker, Evan and Burns, L.E., 2014 Report
Twelker, Evan, and Burns, L.E., 2014, New geochemical and geophysical data from the western Wrangellia minerals assessment area (presentation): Alaska Miners Association 24th Biennial Mining Conference, Fairbanks, Alaska April 7-13, 2014: Alaska Division of Geological & Geophysical Surveys, 34 p. http://doi.org/10.14509/27284
Tuzzolino, A.L. and others, 2014 Report
Tuzzolino, A.L., Newberry, R.J., and Freeman, L.K., 2014, The No Name Pluton: A potential rare-earth element (REE) resource in the Ruby Batholith, Alaska (presentation): Alaska Miners Association, 24th Biennial Mining Conference, Fairbanks, Alaska, April 7-13, 2014: Alaska Division of Geological & Geophysical Surveys, 30 p. http://doi.org/10.14509/27286
Sicard, K.R. and others, 2014 Report
Sicard, K.R., Wypych, Alicja, Twelker, Evan, Freeman, L.K., Bachmann, E.N., Reioux, D.A., Tuzzolino, A.L., and Wright, T.C., 2014, Geochemistry and petrology of igneous rocks from the Styx River map area (presentation): Alaska Miners Association 24th Biennial Mining Conference, April 7-14, 2014, Fairbanks, Alaska: Alaska Division of Geological & Geophysical Surveys, 36 p. http://doi.org/10.14509/27312
Twelker, Evan and others, 2013 Report
Twelker, Evan, Newberry, R.J., Freeman, L.K., Sicard, K.R., Reioux, D.A., and Bachmann, E.N., 2013, DGGS geologic and mineral-resource assessment of the western Wrangellia terrane, central Alaska: Initial progress report (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 4-10, 2013: Alaska Division of Geological & Geophysical Surveys, 25 p. http://doi.org/10.14509/26821
Tuzzolino, A.L. and others, 2013 Map
Tuzzolino, A.L., Newberry, R.J., and Freeman, L.K., 2013, Rare-earth-element (REE) potential in the Ray Mountains area, central Alaska (poster): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 4-10, 2013: Alaska Division of Geological & Geophysical Surveys, 1 sheet. http://doi.org/10.14509/26781
RDF 2013-7 Report Geospatial Data
Blessington, M.J., Reioux, D.A., and Werdon, M.B., 2013, Analyses of historic U.S. Bureau of Mines rock and heavy mineral concentrate samples for geochemical trace-element and rare-earth element data--Ray Mountains and Kanuti-Hodzana uplands area, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2013-7, 2 p. http://doi.org/10.14509/25581
RDF 2013-5 Report Geospatial Data
Bachmann, E.N., Blessington, M.J., Freeman, L.K., Newberry, R.J., Tuzzolino, A.L., Wright, T.C., and Wylie, William, 2013, Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rocks and stream sediments collected in 2012 in the Ray Mountains area, Beaver, Bettles, Livengood, and Tanana quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2013-5, 4 p. http://doi.org/10.14509/25386
MP 151 Report
Adleman, J.N., and Bluemink, Elizabeth, 2013, Second annual Alaska strategic and critical minerals summit: Alaska Division of Geological & Geophysical Surveys Miscellaneous Publication 151, 17 p. http://doi.org/10.14509/25095
RDF 2013-2 Report Geospatial Data
Stevens, D.S.P., Werdon, M.B., and Wright, T.C., 2013, Geochemical trace-element and rare-earth element data from rock samples collected in 2012 on Annette Island, southeast Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2013-2, 2 p. http://doi.org/10.14509/24975
RDF 2012-3 Report Geospatial Data
Freeman, L.K., Szumigala, D.J., Blessington, M.J., and Werdon, M.B., 2012, Geochemical trace-element and rare-earth element data from stream-sediment and pan-concentrate samples collected in 2011 in the Melozitna mining district, Tanana and Melozitna quadrangles, interior Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2012-3, 3 p. http://doi.org/10.14509/23863
RDF 2012-2 Report Geospatial Data
Werdon, M.B., Gallagher, P.E., and Blessington, M.J., 2012, Geochemical, major-oxide, minor-oxide, trace-element, and rare-earth-element data from rock, stream sediment, and pan-concentrate samples collected in 2011 in the William Henry Bay area, Juneau C-4 and D-4 quadrangles, Southeast Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2012-2, 2 p. http://doi.org/10.14509/23843
IC 61 Report
Szumigala, D.J., and Werdon, M.B., 2011, Rare-Earth Elements: A brief overview including uses, worldwide resources, and known occurrences in Alaska: Alaska Division of Geological & Geophysical Surveys Information Circular 61, 12 p. http://doi.org/10.14509/22262
Barker, J.C., 1990 Report
Barker, J.C., 1990, Investigation of a glacial-alluvial fan placer at Taku Inlet: U.S. Bureau of Mines Field Report, 9 p.
Barker, J.C., 1989 Report
Barker, J.C., 1989, Miscellaneous REE-Y-Nb investigations in the Gardner Bay and McLean Arm area: U.S. Bureau of Mines Field Report, 14 p.
Bakke, A.A., 1988 Report
Bakke, A.A., 1988, Coal Creek field report, Spetember 13, 1988: U.S. Bureau of Mines Field Report, 2 p.
Bakke, A.A. and Foley, J.Y., 1988 Report
Bakke, A.A., and Foley, J.Y., 1988, Hagemeister Strait field report: U.S. Bureau of Mines Field Report, 9 p.
Foley, J.Y., 1987 Report
Foley, J.Y., 1987, Reconnaissance strategic and critical mineral investigations in the McGrath A-3 and B-2 Quadrangles, southwest Alaska: U.S. Bureau of Mines Field Report, 42 p.
Foley, J.Y. and Southworth, D.D., 1986 Report Map
Foley, J.Y., and Southworth, D.D., 1986, Butte Creek field report: U.S. Bureau of Mines Field Report, 21 p., 1 sheet.
OFR 215-84 Report Map
Hoekzema, R.B., 1984, Strategic and critical Mineral development potential of the Chugach National Forest southcentral Alaska: U.S. Bureau of Mines Open-File Report 215-84, 64 p., 1 sheet, scale 1:200.
Barker, J.C., 1983 Report
Barker, J.C., 1983, Cobalt and copper investigation of the Hulahula River region: U.S. Bureau of Mines Field Report, 33 p.
Barker, J.C. and Southworth, D.D., 1983 Report
Barker, J.C., and Southworth, D.D., 1983, Copper-cobalt-zinc investigations along the Marsh Fork of the Canning River, northeast Alaska: U.S. Bureau of Mines Field Report, 29 p.
Southworth, D.D., 1982 Report
Southworth, D.D., 1982, Cobalt investigations in the Livengood area: U.S. Bureau of Mines Field Report, 24 p.
Southworth, D.D. and Barker, J.C., 1982 Report
Southworth, D.D., and Barker, J.C., 1982, Invesigation of cobalt and copper potential of the Upper Koness River area, northeastern Alaska: U.S. Bureau of Mines Field Report, 18 p.
Southworth, D.D., 1982 Report
Southworth, D.D., 1982, Cobalt investigation of the Manley Hot Springs dome area: U.S. Bureau of Mines Field Report, 17 p.
Southworth, D.D. and Will, G.S., 1982 Report
Southworth, D.D., and Will, G.S., 1982, Manganese and cobalt investigation of the Kongakut River region: U.S. Bureau of Mines Field Report, 20 p.
Barker, J.C., 1982 Report
Barker, J.C., 1982, Investigation of reported nickel - bearing alum near Old Rampart, Porcupine River, northeast Alaska: U.S. Bureau of Mines Field Report, 13 p.
Roberts, W.S., 1982 Report
Roberts, W.S., 1982, Critical and strategic metals program, Field Report: Nelchina area, South Fork of the Matanuska River, Anchorage Quadrangle: U.S. Bureau of Mines Field Report, 19 p.
Roberts, W.S., 1981 Report
Roberts, W.S., 1981, Field report: Nelchina area, south fork of the Matanuska River, Anchorage Quadrangle: U.S. Bureau of Mines Field Report, 19 p.