Smith, T.E. Robinson, M.S. Weber, F.R. Waythomas, C.F. Reifenstuhl, R.R. 1994 map, vector digital data Professional Report PR 115 Fairbanks, Alaska - USA State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 19 p., 1 sheet, scale 1:63,360 http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=2315 Geologic studies of the upper Chena River area were undertaken in 1983 as part of the Interior Mining District Evaluation Program, a series of projects designed to develop new information on known mineral districts in interior Alaska. During the three-year course of the program, geologists examined four districts that have contributed significantly to historical gold production in Alaska's Interior, Fairbanks, Livengood, Richardson, and upper Chena River. The authors chose to study the upper Chena River district to better understand (1) the source of placer gold resources near Van Curler's Bar, (2) the nature and production potential of tungsten-bearing skarns in the eastern map area, and (3) a proposed route of a transportation corridor through the area. The greatest contribution of this map and report was drawing the striking parallism between Upper Chena stratigraphy with its associated metallogeny and that of the north flank of the Alaska Range. The layers listed below are present as ArcGIS shape files. Attribute information for the following layers (entities) is included in this metadata file under the "Entity_and_Attribute_Information" section. Each layer is listed and described in detail under its own heading starting "Entity_Type_Label." Basic unit information is also included in the unit code set file "PR115_codeset.pdf." Layers include: >uchenaage_label whole rock major oxide or age date sample (points) >uchenaatt_point strike, dip, and fold axis attitude >uchenageo_arc geologic units (arc) >uchenageo_polygon geologic units (polygons) >uchenalin_arc concealed bedrock contacts >uchenastr_arc fold and fault traces (arc) >uchenastr_point fold and fault traces (points) >uchengrit_polygon areas of rubble >uchenstr2_arc shear zones 1994 publication date Complete None planned -145.516417 -144.484263 65.147819 64.805281 65.11 -145.50 64.86 -145.50 64.81 -145.13 64.81 -144.92 64.84 -144.77 64.95 -144.77 64.97 -144.67 64.97 -144.50 65.06 -144.50 65.14 -144.75 65.14 -145.00 65.11 -145.20 65.11 -145.50 ISO 19115 Topic Category geoscientificInformation none Geologic Map Placer Gold None Chena River Fairbanks Mining District None Birch Creek Schist Birch Hill Sequence Blackshell Unit Chena River Sequence Dan Creek Unit Denali Fault Fairbanks Schist Keevy Peak Formation Tintina Fault Totatlanika Schist West Point Complex Yukon-Tanana Upland None Late Devonian Mississippian Precambrian Tertiary This report, map, and/or dataset are available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. User specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys GIS Data Manager/Cartographer mailing and physical

3354 College Road

Fairbanks AK 99709-3707 (907) 451-5029 (907) 451-5020 (907) 451-5050 dggspubs@alaska.gov You may view our web site at http://www.dggs.dnr.state.ak.us for the latest information on available data. Please e-mail your questions and data requests when possible since our web site and e-mail address will remain current even if our phone number and mailing address change. The Alaska legislature provided funding for the studies through capital and operating budget appropriations. Additional Acknowledgments: Geology by T.E. Smith, M.S. Robinson, F.R. Weber, C.F. Waythomas, and R.R. Reifenstuhl, assisted by D.D. Adams, G.L. Allegro, T.D. Balog, D.A. Coleman, J.W. Lindhorst, J.M. Murphy, and D.D. Southworth. Geochronology by J.N. Aleinikoff, U.S. Geological Survey, J.K. Mortenson, Geological Survey of Canada, D.L. Turner, University of Alaska Fairbanks, and F.H. Wilson, U.S. Geological Survey. Richard D. Reger and Richard C. Swainbank provided technical review and Fran Tannian provided a thorough edit. Digital cartography by Fred Sturmann. Microsoft Windows XP SP2, ArcGIS 9.+, and any text editor. Geologic point, line, and polygon data were determined in the field using 1:63,360-scale topographic maps and 1:50,000 (nominal) scale, color-infrared aerial photographs. Geologic data included in the compilation are the field maps and notes from this project as well as data from other sources as noted in the "Sources Cited" section. Polygon topology present and clean on appropriate data. Other data are line, point, or annotation data and do not require topologic relationships. This dataset includes geospatial information related to geologic units, fold and fault traces, strike, dip, and fold axis attitude, concealed bedrock contacts, shear zones, areas of rubble and whole rock major oxide or age date samples. Location data were determined visually using topographic maps at a scale of 1:63,360 and 1:50,000 (nominal) scale, and black and white aerial photographs. 10 Surficial-geologic map data have a horizontal positional accuracy dependent on: (1) the 1:50,000-scale (nominal) aerial photographs on which they are based, with an estimated potential error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground; (2) the accuracy of the human zoom transfer scope operator in tracing the linework from acetate overlays to topographic base maps, with an estimated error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground; (3) the accuracy of the zoom transfer process itself, error magnitude highly variable and unknown but potentially large; (4) the digitizing RMS error of 0.003 inches [input coverage units], which equates to approximately 5 meters on the ground for a 1:63,360-scale map; and (5) the accuracy of the human operator digitizing the geologic linework from the topographic base maps, with an estimated error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground. Total potential horizontal error for surficial-geologic map features is therefore estimated to be approximately 10 meters. Wahrhaftig, Clyde 1968 map U.S. Geological Survey Bulletin B 1254-E Denver, CO U.S. Geological Survey p. E1-E22 http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=3654 50000 paper 1968 Publish date Wahrhaftig, 1968 This publication helped with detailed description and samples from the Alaska Range stratigraphy. Bundtzen, T.K. Smith, T.E. Tosdal, R.M. 1976 map Alaska Open-File Report AOF 98 Fairbanks, Alaska Alaska Division of Geological & Geophysical Surveys 82 p., 2 sheets, scale 1:63,360 http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=194 George Plafker (ed.) H.C. Berg (ed). 1994 map The Geology of North America v. G1 Boulder, Colorado Geological Society of America 63360 paper 1976 publication date Bundtzen and others, 1976 This publication helped with detailed description and samples from the Alaska Range stratigraphy. Fieldwork - Mappers recorded observations in field notebooks and on the aerial photographs and topographic maps, predominantly at 1:63,360 scale. In some areas, photocopies of topography at varying enlarged scales were used. All compilations were made by hand on stable Mylar at 1:63,360 scale. Locations were determined visually in the field by reference to surrounding topography and sometimes by triangulation with Brunton compasses. Unknown Geologic map compilation - Data for geologic coverages was digitized off of a Mylar geologic compilation. This compilation was done on a one to one scale, stable Mylar of the USGS topographic base for each of the 1:63,360 scale USGS topographic bases included in the map area. The bedrock geologic map was compiled using field notes from fieldwork process step (above). Wahrhaftig 1968 and Bundtzen and others, 1976 helped with detailed description and samples from the Alaska Range stratigraphy. Wahrhaftig, 1968 Bundtzen and others, 1976 Unknown Universal Transverse Mercator 6 0.999600 -147.00000 0 500000.0 0 coordinate pair 0.000128 0.000128 meters uchenageo_arc Universal Transverse Mercator 6 0.999600 -147.00000 0 500000.0 0 coordinate pair 0.000128 0.000128 meters uchenageo_polygon Universal Transverse Mercator 6 0.999600 -147.00000 0 500000.0 0 coordinate pair 0.000128 0.000128 meters uchenaatt_point Universal Transverse Mercator 6 0.999600 -147.00000 0 500000.0 0 coordinate pair 0.000128 0.000128 meters uchenastr_arc Universal Transverse Mercator 6 0.999600 -147.00000 0 500000.0 0 coordinate pair 0.000064 0.000064 meters uchenastr_point Universal Transverse Mercator 6 0.999600 -141.00000 0 500000.0 0 coordinate pair 0.000032 0.000032 meters uchenstr2_arc Universal Transverse Mercator 6 0.999600 -147.00000 0 500000.0 0 coordinate pair 0.000064 0.000064 meters uchenalin_arc Universal Transverse Mercator 6 0.999600 -147.00000 0 500000.0 0 coordinate pair 0.000032 0.000032 meters uchengrit_polygon Universal Transverse Mercator 6 0.999600 -147.00000 0 500000.0 0 coordinate pair 0.000064 0.000064 meters uchenaage_label North American Datum of 1927 Clarke 1866 6378206.4 294.978698 uchenageo_polygon.shp Object type is vector, there are 1753 rows associated with this entity, and the entity values refer to the unit name abbreviations for each specific polygon represented on the map. Alaska Division of Geological & Geophysical Surveys uchenageo_polygon UNIT A unique three to four letter abbreviation given to each map unit represented on the map. Alaska Division of Geological & Geophysical Surveys PR115_codeset.pdf Alaska Division of Geological & Geophysical Surveys http://www.dggs.dnr.state.ak.us/metadata/PR115_codeset.pdf uchenageo_arc.shp Object type is vector, there are 4785 rows associated with this entity, and the entity values refer to geologic map unit contacts. Alaska Division of Geological & Geophysical Surveys uchenageo_arc SYMBOL Symbol representing type of contact between geologic units. Alaska Division of Geological & Geophysical Surveys 0 Boundary to unmapped area. Alaska Division of Geological & Geophysical Surveys 15 Thrust fault - saw teeth on upper plate; approximately located. Alaska Division of Geological & Geophysical Surveys 16 Thrust fault - saw teeth on upper plate; questionable. Alaska Division of Geological & Geophysical Surveys 25 Contact. Alaska Division of Geological & Geophysical Surveys uchenaatt_point.shp Object type is point, there are 776 rows associated with this entity, and the entity values refer to the strike, dip, and fold axis attitude. Alaska Division of Geological & Geophysical Surveys uchenaatt_point SYMBOL Symbol representing types of attitudes. Alaska Division of Geological & Geophysical Surveys 3 Strike and dip of vertical beds. Alaska Division of Geological & Geophysical Surveys 5 Strike and dip of foliation; inclined. Alaska Division of Geological & Geophysical Surveys 9 Crumpled, undulatory beds. Alaska Division of Geological & Geophysical Surveys 12 Strike and dip of foliation, vertical. Alaska Division of Geological & Geophysical Surveys 14 Strike and dip of foliation, horizontal. Alaska Division of Geological & Geophysical Surveys 15 Strike and dip of joints, inclined. Alaska Division of Geological & Geophysical Surveys 24 Strike and dip of joints, vertical. Alaska Division of Geological & Geophysical Surveys 33 Bearing and plunge of lineation; c, crenulation; f, minor fold axis; q, quartz boudins; m, mineral. Alaska Division of Geological & Geophysical Surveys 44 Strike and dip of cleavage. Alaska Division of Geological & Geophysical Surveys uchenastr_arc.shp Object type is vector, there are 152 rows associated with this entity, and the entity values refer to all fold axes and fault traces. Alaska Division of Geological & Geophysical Surveys uchenastr_arc SYMBOL Symbol representing type of fold axis and fault trace. Alaska Division of Geological & Geophysical Surveys 2 High-angle fault, approximately located. Arrows show apparent direction of relative horizontal movement. U, upthrown block; D, downside block. Alaska Division of Geological & Geophysical Surveys 3 High-angle fault, concealed. Arrows show apparent direction of relative horizontal movement. U, upthrown block; D, downside block. Alaska Division of Geological & Geophysical Surveys 5 High-angle fault, concealed. Arrows show apparent direction of relative horizontal movement. U, upthrown block; D, downside block. Alaska Division of Geological & Geophysical Surveys 6 High-angle fault, queried where questionable. Alaska Division of Geological & Geophysical Surveys 13 Thrust fault - saw teeth on upper plate. Enclosed circle. Alaska Division of Geological & Geophysical Surveys 14 Thrust fault - saw teeth on upper plate. Alaska Division of Geological & Geophysical Surveys 15 Thrust fault - saw teeth on upper plate. Dashed where approximately located. Alaska Division of Geological & Geophysical Surveys 16 Thrust fault - saw teeth on upper plate. Dashed where approximately located. Queried where questionable. Alaska Division of Geological & Geophysical Surveys 17 Thrust fault - saw teeth on upper plate. Dotted where concealed. Alaska Division of Geological & Geophysical Surveys 18 Thrust fault - saw teeth on upper plate. Dotted where concealed. Queried where questionable. Alaska Division of Geological & Geophysical Surveys 31 Trace and plunge of fold axis. Alaska Division of Geological & Geophysical Surveys 37 High-angle fault. U, upthrown block; D, downside block. Alaska Division of Geological & Geophysical Surveys uchenastr_point.shp Object type is point, there are 8 rows associated with this entity, and the entity values refer to all fold axes and fault traces. Alaska Division of Geological & Geophysical Surveys uchenastr_point SYMBOL Symbols that represent the types of structural features. Alaska Division of Geological & Geophysical Surveys 16 Trace and plunge of anticlinal fold axis. Alaska Division of Geological & Geophysical Surveys 17 Trace and plunge of synclinal fold axis. Alaska Division of Geological & Geophysical Surveys 144 High angle fault - arrows show apparent direction of relative horizontal movement. Alaska Division of Geological & Geophysical Surveys uchenalin_arc.shp Object type is vector, there are 198 rows associated with this entity, and the entity values refer to concealed bedrock contacts. Alaska Division of Geological & Geophysical Surveys uchenalin_arc SYMBOL Symbol representing concealed bedrock contacts. Alaska Division of Geological & Geophysical Surveys 27 Concealed bedrock contacts as interpreted by T.E. Smith. Alaska Division of Geological & Geophysical Surveys uchenstr2_arc.shp Object type is vector, there are 6 rows associated with this entity, and the entity values refer to areas of shear zones. Alaska Division of Geological & Geophysical Surveys uchenstr2_arc SYMBOL Symbol representing areas of shear zones. Alaska Division of Geological & Geophysical Surveys 1 Shear Zone - undetermined offset. Alaska Division of Geological & Geophysical Surveys uchengrit_polygon.shp Object type is vector, there are 6 rows associated with this entity, and the entity values refer to areas of rubble. Alaska Division of Geological & Geophysical Surveys uchengrit_polygon SYMBOL Area of rubble. Alaska Division of Geological & Geophysical Surveys 4 Area of bi-modal "quartz-eye" quartzite rubble, mainly in Pcu unit. Alaska Division of Geological & Geophysical Surveys 50 Area of augen gneiss (Pzra) rubble. Alaska Division of Geological & Geophysical Surveys uchenaage_label.shp Object type is point, there are 27 rows associated with this entity, and the entity values refer to sample locations for whole rock major oxide and age dating analysis. Alaska Division of Geological & Geophysical Surveys uchenaage_label SYMBOL Sample locations for whole rock major oxide and age dating. Alaska Division of Geological & Geophysical Surveys 128 Location of sample for whole rock major oxide or age dating. Alaska Division of Geological & Geophysical Surveys State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Natural Resource Technician mailing and physical

3354 College Road

Fairbanks AK 99709-3707 USA 907-451-5020 None available. 907-451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays Please view our web site (http://www.dggs.dnr.state.ak.us) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Professional Report 115 The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products, any failure thereof, or otherwise, and in no event will the State of Alaska's liability to the requester or anyone else exceed the fee paid for the electronic service or product. Current publication is available on paper. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Printed publication can be purchased for $8.50 (contact information below) plus shipping if mailed. PDF 1.6 No compression applied http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=2315 ArcGIS Shapefile ESRI ArcGIS 9.x No compression applied http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=2315 CD-ROM Joliet Digital files on CD-ROM are available for $10.00 (contact information below). No fees charged for downloaded files. Order by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). The DGGS web site (http://www.dggs.dnr.state.ak.us/) has a list of electronic data available and an order form that can be printed. Payment accepted: Cash, check, money order, VISA, or MasterCard. Digital downloads: less than 30 minutes for most files. Offline CD/DVD-ROMs: 1-2 weeks unless special arrangements are made and an express fee is paid. Please check the MapInfo web site (http://www.mapinfo.com/) for the latest documentation on importing ESRI shape files. 20080506 20080506 20090105 State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Metadata Manager mailing and physical address

3354 College Road

Fairbanks AK 99709-3707 USA 907-451-5039 907-451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays. Please contact us through the e-mail address above whenever possible. FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 none If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys.