CHARACTERIZATION OF CORED SEDIMENTS FROM THE HIGH PLAINS AQUIFER IN KANSAS Greg A. Ludvigson, Kansas Geological Survey, University of Kansas, Lawrence, KS Jon J. Smith, Kansas Geological Survey, University of Kansas, Lawrence, KS John Doveton, Kansas Geological Survey, University of Kansas, Lawrence, KS Rolfe Mandel, Kansas Geological Survey, University of Kansas, Lawrence, KS Laura Murphy, Kansas Geological Survey, University of Kansas, Lawrence, KS Anthony Layzell, Kansas Geological Survey, University of Kansas, Lawrence, KS Randy L. Stotler, Department of Geology, University of Kansas, Lawrence, KS Richard Sleezer, Earth Sciences Department, Emporia State University, Emporia, KS Supported by NSF EAR-1023285 and the STATEMAP Program administered by the U.S. Geological Survey. Special thanks to Susan Stover of the Kansas Water Office for advice and help in launching the High Plains coring program. Study areas for scientific coring in Cenozoic deposits of the Great Plains • • As of August 2014, KGS cores totalled 3,010 feet. September 2014 drilling at the Calvert volcanic ash mine, Landon Draw, and Borchers Badlands has added another 200 feet and counting. Project Personnel: Stratigraphic & Paleoclimatic Analysis (KGS/KU) Paleomagnetics & Magnetostratigraphy (New Mexico Highlands University) Dr. Mike Petronis—NSF PI/PD Dr. Kate Zeigler—NSF Postdoc Dr. Jon J Smith—NSF PI/PD Dr. Greg Ludvigson—NSF co-PI (stable isotopes) Dr. John Doveton—NSF co-PI (gamma ray data) Dr. Rolfe Mandel—KGS (Q. soil stratigraphy) Dr. Brian Platt—former KGS Postdoc (now at U. Miss.) Isotopic Hydrogeochemistry & Groundwater Recharge Mechanisms Dr. Andreas Möller—KU U/Pb Geochronologist (KU Department of Geology) Laura Murphy—KGS GRA (supervisor G&P lab) Tony Layzell—KGS GRA & NSF IGERT Fellow Dr. Randy Stotler—hydrogeologist Hunter Harlow—former KGS GRA (now at Baylor U.) Britney Katz—GRA Bridget Sanderson—KGS lab asst. Joe Anderson—KGS Chief Driller Tony Wedel—former KGS Apprentice Driller Jeremy Scobee—KGS Apprentice Driller Brian Sitek—KU graduate fellow (U/Pb geochronology) Adrienne Duarte—former KGS lab tech (organic δ13C data) Stable Isotope Chemostratigraphy • Fox & Koch (2003) compiled δ13C values from outcrops throughout High Plains Aquifer with published biostratigraphic or tephrochronologic dates • δ13C values shift from dominantly C3 to heat and arid adapted C4 paleofloras Data from Fox and Koch (2003) Modified from Koch (1998) Stable Isotope Chemostratigraphy Stable Isotope chemostratigraphic trends on the High Plains shift over time Kansas High Plains Aquifer Atlas - http://www.kgs.ku.edu/HighPlains/HPA_Atlas/index.html Research Goals • Coring operations complete in McPherson and Harvey Counties. •Lithologic descriptions and isotopic analyses on-going in McPherson and nearly complete in Harvey Co. •Optically Stimulated Luminescence results suggest depositional age below loess deposits are beyond the limit of this dating technique (~400 ka) •Tephrochronology? Sedimentologic and Stable Isotopic Analyses Quaternary Loess Neogene (?) “McPherson Formation” Permian Wellington Formation • We need dates! Study areas for scientific coring in Cenozoic deposits of the Great Plains • • As of August 2014, KGS cores totalled 3,010 feet. September 2014 drilling at the Calvert volcanic ash mine, Landon Draw, and Borchers Badlands has added another 200 feet and counting. Scientific Coring of the High Plains Aquifer by the Kansas Geological Survey Spudding of the HP1A borehole in April 2011 GMD3 Index Well Supported by: 1. 2. 3. 4. 5. STATEMAP Program (USGS) U.S. National Science Foundation Kansas Water Office U.S. Bureau of Reclamation Southwest Kansas GMD From: http://harvestpublicmedia.org/article/573/getting-core-ogallala/5 7/11/2011 Rack for standing 1-meter length plastic core tubes from Rotosonic Drill; peristaltic pump is pulling groundwater samples into Nalgene sample bottles for stable isotopic hydrogeochemical studies by Randy Stotler & Britney Katz. Thomas County Core Slide courtesy of Britney Katz From: Smith et al., 2014, Ogallala-High Plains Aquifer Special Study Phase III: Lithologic Calibration of Practical Saturated Thickness In the Ogallala-High Plains Aquifer: Kansas Geological Survey Open File Report 2014-2, 9 p. Study areas for scientific coring in Cenozoic deposits of the Great Plains • • As of August 2014, KGS cores totalled 3,010 feet. September 2014 drilling at the Calvert volcanic ash mine, Landon Draw, and Borchers Badlands has added another 200 feet and counting. Cimarron River Valley transect; Dissertation Research of KGS GRA Tony Layzell Isotropic glass bubble-wall shard; 0.62 mm FOV; xpol. Dr. Jon J. Smith (l) and R. Hunter Harlow (r) at exposure of volcanic ash lentil in the Ogallala Formation, Landon Draw in Scott County, Kansas; summer 2012. Landon Draw Ash 11.352 +/0.43551 Ma Tera-Wasserburg Concordia Plot showing concordant age of zircon. Correlating zircon grain. (Second from left) Miocene (11.3 Ma) volcanogenic zircon from the Landon Draw volcanic ash lentil, data courtesy of Brian Sitek. Volcanic ash (= 11.3 Ma?) from The Calvert Mine in Norton Co. Kansas. April 2011. Tony Layzell (l) & Dr. Jon J. Smith (r) at exposure of Huckleberry Ridge volcanic ash (2.1 Ma) at Borchers Badlands in Meade Basin; May 2014. Thanks for your attention!
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