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North Dakota Geological Survey 100K Series: Mott - al Cartographic Compilation: E. L. Kadrmas Edward C. Murphy, State Geologist Lynn D. Helms, Director Dept. of Mineral Resources ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( Cedar Creek Buffa lo Creek Duck Creek Ind ian Creek Chan ta Peta Creek Dayton Creek Slick Creek Russian Slo ugh Chilton Creek Coon Creek ar Creek Thirtymile Creek Mehrer Creek Cedar Creek Willow Creek Cannonball River Plum Creek ee Flat Creek Sprin g Creek Goose Creek Goose Creek Sprin g Creek Sheep Creek Sprin g Creek Coal Bank Creek Wolf Butte Creek Hay Nort h Ceda r Creek ek Squaw Creek Cedar Creek Duck Creek TImber Creek Van Patton Slough Dry Lake Cedar Lake Cannonball River Mirror Lake Jung Lake Larson Lake North Lemmon Lake Township Lake Ehler Lake White Butte Reservoir Rustan Lake Charles Lake 24% 22% 16% 18% 18% 21% 20% 16% 25% 19.8% 9' 7' 6' 6' 12' 11' 11' 13' 14' 8' 52 51 37 36 41 39 38 40 35 33 34 44 45 SLOPE COUN TY ! ( 22 ! ( 22 ! ( 22 ! ( 21 ! ( 21 ! ( 8 ! ( 8 ! ( 21 ! ( 8 ! ( 8 ( / 12 ( / 12 ( / 12 HETTINGER COUNTY ADAMS COUNTY ADAMS COUNTY HETTINGER COUNTY Mo tt Regent Haynes Reeder Bucyrus Hettinger 6 6 1 6 6 1 6 1 6 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 6 1 1 6 1 1 1 6 6 6 1 6 6 1 1 1 1 6 1 1 6 6 6 6 6 1 1 1 6 6 6 1 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 1 1 1 6 31 31 31 31 36 36 31 36 36 31 31 31 36 36 36 36 31 36 36 31 36 36 36 36 36 36 36 36 36 36 36 31 36 31 36 36 36 31 36 36 36 36 31 31 36 31 31 36 31 31 36 31 36 31 31 36 36 36 31 31 36 31 36 36 36 36 31 36 36 31 31 31 31 36 31 31 36 36 36 36 31 31 31 31 31 36 31 31 31 31 36 31 31 31 31 31 31 31 36 31 31 31 31 31 36 31 31 36 36 36 36 31 1 1 6 6 6 1 1 6 1 1 6 1 6 1 1 1 1 6 36 36 36 36 6 1 Note: This map was expanded beyon d the normal Mott 100K Sheet to include an additional height o f fou r miles south to th e South Dakota border. 102 o 00 ' 46 o 30 ' R. 97 W. R. 95 W. R. 94 W. R. 93 W. R. 92 W. R. 90 W. R. 91 W. R. 96 W. R. 98 W. 103 o 00 ' 46 o 30 ' T. 135 N. T. 133 N. T. 131 N. T. 130 N. T. 132 N. T. 134 N. T. 129 N. 103 o 00 ' 46 o 00 ' 102 o 00 ' R. 98 W. R. 96 W. R. 97 W. R. 95 W. R. 94 W. R. 93 W. R. 92 W. R. 91 W. Alumina Content of Paleocene Claystones Mott 100K Sheet, North Dakota Adjoining 100K Maps T. 135 N. T. 133 N. T. 131 N. T. 130 N. T. 132 N. T. 134 N. T. 129 N. 46 o 00 ' 1980 Magnetic North Declination at Center of Sheet 12 o Mott 100K Sheet, North Dakota Edward C. Murphy 2013 Other Features Water County Boundary Section Corners E Unpaved Road River/Stream - Intermittent Paved Road River/Stream - Perennial State Highway ! ( 22 Water - Intermittent Mercator Projection 1927 North American Datum Standard parallel 46 o 00 ' Central meridian 102 o 30 ' 0 1 2 3 4 Miles Scale 1:100,000 Only a handful of studies have published the alumina (Al2O3) contents of clay- stones in western North Dakota: Clarke (1948), Hansen (1959), Chew and Boyd (1960), Prichard (1980), and Murphy (2012). Clarke (1948) collected 417 samples primarily from the Chalky Buttes in Slope County and the Little Badlands in Stark County. All but eight of his samples were from bentonites (primarily the South Heart Member of the Chadron Formation). Clarke's sample localities were not plotted on any of the map sheets because the current project is focused on the alumina content of kaolin deposits. Chew and Boyd (1960) reported alumina values for 52 sample sites in western North Dakota. They plotted the sample locations on county maps published by the ND Highway Department at one inch to the mile. Chew and Boyd analyzed only one sample from this map sheet. The North Dakota Geological Survey collected 232 samples from 62 localities in western North Dakota in 2011 and 2012. The initial results were published in NDGS Geologic Investigations no. 158 and the full report will be published in NDGS Report of Investigations no. 112. Multiple samples were collected from all but the most limited outcrops. The NDGS alumina values plotted on this map represent an average of four analyses (range from 2 to 8) per site. Only sample 55 represents a single analysis. The alumina value is a weighted percent (the sum of individual analyses were multiplied by individual bed thickness and then divided by the thickness of the entire kaolin layer). WHITE RIVER and ARIKAREE Strata (Eocene through Miocene) Geology Undifferentiated GOLDEN VALLEY FORMATION (Paleocene and Eocene) The Bear Den Member is generally at the surface along the outer edges (contact between the Golden Valley and Sentinel Butte Formations) of the deposit. The White River and Arikaree rocks were plotted on this map because they may contain various concentrations of erionite. Erionite is a fibrous zeolite that has been identified by the World Health Organization as a Group 1 carcinogen. Any proposed mining of the Bear Den in the vicinity of White River or Arikaree rocks will require the overburden be tested for erionite and could, depending upon results, curtail mining in the area. RHAME BED (Paleocene) The top of the Rhame Bed marks the contact between the Slope Formation and the overlying Bullion Creek Formation. This contact was mapped by Carlson (1979) at a scale of 1:125,000. REFERENCES Carlson, C.G., 1978, Geology of Bowman and Adams Counties, North Dakota: North Dakota Geological Survey No. 65, Part 1 , 29 p. Chew, R.T. III, and Boyd, G.A., 1960 , A preliminary investigatio n of clay deposits in Min nesota, North Dakota, Montana, Northern Idaho, and Washington; Northern Pacific Railroad Company, Properties and Industrial Development Department, 161 p. Clarke, F.F., 1948, So uthwestern North Dakota clay deposits Stark, Slope, and Billin gs coun ties, N.Dak .: U.S. Bureau of Mines Report of Investigations 3219, 32 p. Hansen, Miller, 1959, Clays of North Dakota as a potential source of alumina; North Dakota Geological Survey Report of In vestig ation no. 33 , 15 p. Murphy, E.C., 2012, Alumina content of the Bear Den Member and the Rhame Bed in North Dakota; North Dakota Geo logical Su rvey Geological Investigation s n o. 1 58. Prichard, G.H., 1980, Authigenic kaolinite in the Bear Den Member (Paleocene) of the Golden Valley Formation in southwestern North Dakota, unpublished Master's Thesis, University of North Dakota, 174 p. 104 o 00 ' EXPLANATION ! ( 16% 6' 44 ! ( Sample or Site I.D. Alumina Percent Bed Thickness (underlined if it is the entire bed) Murphy (2012) Chew and Boyd (1960) ! ( ! ( Sample not analyzed
