Session: Advances in the Geology, Geochemistry, Geochronology, Isotope Geochemistry, Geophysics, Structural Geology, and Tectonics of Central Colorado (2010 GSA Denver Annual Meeting (31 October

Paper #

Start Time

1:30 PM

Introductory Remarks

1

1:35 PM

THE EARLY PROTEROZOIC POUDRE BASIN, AN IMPORTANT CONSTRAINT OF 1.77—1.73-GA TECTONIC EVENTS IN NORTHERN COLORADO

DEWITT, Ed, Central Mineral Resources Team, US Geological Survey, MS 973, Denver Federal Center, Lakewood, CO 80225, PREMO, Wayne R., U.S. Geol Survey, MS 980, P.O. Box 25046, Denver Federal Center, Denver, CO 80225 and KLEIN, Terry, U.S. Geological Survey, Denver Federal Center, Box 25046, MS 973, Denver, CO 80225-0046, edewitt@usgs.gov, edewitt@usgs.gov

2

1:55 PM

SOME OF THE OLDEST ROCKS IN COLORADO ARE RIFT-RELATED? RESULTS FROM SHRIMP U-PB ZIRCON GEOCHRONOLOGY AND MAJOR AND TRACE-ELEMENT GEOCHEMISTRY

PREMO, W.R., USGS, Denver Federal Center, Denver, CO 80225, DEWITT, Ed H., Central Mineral Resources Team, US Geological Survey, MS 973, Denver Federal Center, Lakewood, CO 80225, KLEIN, Terry L., U.S. Geological Survey, Central Mineral and Environmental Resources Science Center, Denver Federal Center, P.O. Box 25046, MS 973, Denver, CO 80225-0046, KELLOGG, Karl S., U.S. Geol Survey, Mail Stop 980, Box 25046, Denver Federal Center, Denver, CO 80225, COLE, James C., U.S. Geol Survey, MS 980, Box 25046, Denver Federal Center, Denver, CO 80225 and WORKMAN, Jeremiah B., U.S. Geological Survey, Box 25046, DFC, MS 980, Denver, CO 80225, wpremo@usgs.gov, wpremo@usgs.gov

3

2:10 PM

CONTRASTING PLUTONIC STYLES IN THE PALEOPROTEROZOIC OF COLORADO BETWEEN CA. 1.725 TO 1.690 GA: RESULTS FROM SHRIMP U-PB ZIRCON GEOCHRONOLOGYAND MAJOR AND TRACE-ELEMENT GEOCHEMISTRY

PREMO, W.R., USGS, Denver Federal Center, Denver, CO 80225, DEWITT, Ed H., Central Mineral Resources Team, US Geological Survey, MS 973, Denver Federal Center, Lakewood, CO 80225, KELLOGG, Karl S., U.S. Geol Survey, Mail Stop 980, Box 25046, Denver Federal Center, Denver, CO 80225, KLEIN, Terry L., U.S. Geological Survey, Central Mineral and Environmental Resources Science Center, Denver Federal Center, P.O. Box 25046, MS 973, Denver, CO 80225-0046, COLE, James C., U.S. Geol Survey, MS 980, Box 25046, Denver Federal Center, Denver, CO 80225 and WORKMAN, Jeremiah B., U.S. Geological Survey, Box 25046, DFC, MS 980, Denver, CO 80225, wpremo@usgs.gov, wpremo@usgs.gov

4

2:30 PM

FACTORS CONTROLLING GENERATION AND DISTRIBUTION OF 1400-MA PLUTONS IN COLORADO

DEWITT, Ed, Central Mineral Resources Team, US Geological Survey, MS 973, Denver Federal Center, Lakewood, CO 80225, PREMO, Wayne R., U.S. Geol Survey, MS 980, P.O. Box 25046, Denver Federal Center, Denver, CO 80225 and KLEIN, Terry, U.S. Geological Survey, Denver Federal Center, Box 25046, MS 973, Denver, CO 80225-0046, edewitt@usgs.gov, edewitt@usgs.gov

5

2:45 PM

PROTEROZOIC TECTONICS IN COLORADO: INVESTIGATING THE STRUCTURAL EVOLUTION OF THE IDAHO SPRINGS-RALSTON SHEAR ZONE

WESSEL, Zachary R., Geosciences, Colorado State University, 1482 Campus Delivery, Fort Collins, CO 80523, RIDLEY, John, Department of Geosciences, Colorado State University, Fort Collins, CO 80523-1482 and CAINE, Jonathan Saul, U.S. Geological Survey, Box 25046, DFC, MS 964, Denver, CO 80225-0046, zachary.wessel@colostate.edu, zachary.wessel@colostate.edu

6

3:00 PM

TECTONIC EVOLUTION OF THE EASTERN COLORADO FRONT RANGE: A TALE OF TWO SHEAR ZONES

RIDLEY, John¹, WESSEL, Zachary¹ and CAINE, Jonathan Saul², (1)Geosciences, Colorado State University, Fort Collins, CO 80523, (2)U.S. Geological Survey, Box 25046, DFC, MS 964, Denver, CO 80225-0046, jridley@warnercnr.colostate.edu, jridley@warnercnr.colostate.edu

3:15 PM

Break

7

3:30 PM

TERTIARY MAGMATISM IN THE SILVER CLIFF, ROSITA, AND DEER PEAK VOLCANIC CENTERS, WET MOUNTAINS: COLORADO-GEOCHEMISTRY, GEOCHRONOLOGY, AND STRUCTURAL EVOLUTION

KLEIN, Terry, U.S. Geological Survey, Denver Federal Center, Box 25046, MS 973, Denver, CO 80225-0046, DEWITT, Ed, Central Mineral Resources Team, US Geological Survey, MS 973, Denver Federal Center, Lakewood, CO 80225, KUNK, Michael J., U.S. Geological Survey, 926A National Center, Reston, VA 20192, USA USA, PREMO, Wayne R., U.S. Geol Survey, MS 980, P.O. Box 25046, Denver Federal Center, Denver, CO 80225 and COSCA, Michael A., USGS, Box 25046, Denver, CO 80225-0046, tklein@usgs.gov, tklein@usgs.gov

8

3:45 PM

USING THE INTRUSIVE RECORD TO UNDERSTAND CALDERA MAGMATISM: THE GEOCHRONOLOGY AND GEOCHEMISTRY OF THE MT. AETNA CALDERA COMPLEX, CENTRAL COLORADO

ZIMMERER, Matthew J., Earth and Environmental Sciences, New Mexico Institute of Mining and Technology, 801 Leroy Pl PO 2711, Socorro, NM 87801, MILLS, Ryan D., ARES, NASA-JSC, Houston, TX 77058, COLEMAN, D.S., Department of Geological Sciences, University of North Carolina at Chapel Hill, CB# 3315, Mitchell Hall, Chapel Hill, NC 27599, MCINTOSH, William, New Mexico Bureau of Geology and Mineral Resources, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801 and HUGHES, K. Stephen, Marine, Earth, and Atmospheric Sciences, North Carolina State University, 2800 Faucette Drive, Rm. 1125 Jordan Hall, Raleigh, NC 27695, mjz1983@nmt.edu, mjz1983@nmt.edu

9

4:00 PM

THE VOLCANO-PLUTONIC CONNECTION AT THE MID-TERTIARY NEVER SUMMER IGNEOUS COMPLEX, NORTH CENTRAL COLORADO

JACOB, Kristin H., Geological Sciences, University of Colorado, Campus Box 399, Boulder, CO 80309 and FARMER, G. Lang, Dept. of Geological Sciences and CIRES, Univ. of Colorado, Campus Box 399, Boulder, CO 80309-0399, halbergk@cs.com, halbergk@cs.com

10

4:15 PM

GORE RANGE, BLUE RIVER VALLEY, AND WESTERN FRONT RANGE, COLORADO – ADVANCES IN UNDERSTANDING THE GEOLOGIC FRAMEWORK BASED ON NEW MAPPING AND GEOCHRONOLOGIC STUDIES

KELLOGG, Karl S.¹, SHROBA, Ralph R.², PREMO, Wayne R.³ and BRYANT, Bruce¹, (1)U.S. Geol Survey, Mail Stop 980, Box 25046, Denver Federal Center, Denver, CO 80225, (2)U.S. Geol Survey, MS 980, Box 25046, Denver Federal Center, Denver, CO 80225, (3)USGS,MS 963, Denver Federal Center, Denver, CO 80225, kkellogg@usgs.gov, kkellogg@usgs.gov

11

4:30 PM

IS THERE A LARGE COLLAPSE AREA ASSOCIATED WITH EVAPORITE KARST IN THE SOUTHWESTERN PART OF SOUTH PARK, COLORADO?

KIRKHAM, Robert M., GeoLogical Solutions, 5253 County Road 1 South, Alamosa, CO 81101, rmk@gojade.org, rmk@gojade.org

12

4:45 PM

EVALUATION OF THE EXTENT OF CONTAMINATION CAUSED BY HISTORICAL MINING IN CATCHMENTS OF CENTRAL COLORADO

CHURCH, Stanley E., Church GeoScience Consultants, Inc, 601 Little River Path, The Villages, FL 32162, FEY, David L., U.S. Geological Survey, Mineral Resources Team, MS 973, Box 25046, Denver Federal Center, Denver, CO 80225, WANTY, Richard B., U.S. Geological Survey, MS 964d, Box 25046, Denver Federal Center, Denver, CO 80225, SCHMIDT, Travis S., U.S. Geological Survey, 2150 Centre Ave Bldg C, Fort Collins, CO CO 80526, KLEIN, T.L., Central Mineral Resources Team, US Geological Survey, MS 973, Denver Federal Center, Denver, CO 80225, ROCKWELL, Barnaby W., U.S. Geological Survey, P.O. Box 25046, Denver Federal Center, MS 973, Denver, CO 80225 and SAN JUAN, Carma A., U.S. Geological Survey, Central Mineral and Environmental Resources Science Center, P.O. Box 25046, MS 973, Denver, CO 80225, Stan@ChurchGeo.com, Stan@ChurchGeo.com

13

5:00 PM

MAPPING STREAM SEDIMENT GEOCHEMISTRY IN CENTRAL COLORADO

GILES, Stuart A., U.S. Geological Survey, P.O. Box 25046, MS 973, Denver Federal Center, Denver, CO 80225-0046, EPPINGER, Robert G., U.S. Geological Survey, Central Mineral and Environmental Resources Science Center, P.O. Box 25046, MS 973, Denver, CO 80225-0046 and KLEIN, Terry L., U.S. Geological Survey, Central Mineral and Environmental Resources Science Center, Denver Federal Center, P.O. Box 25046, MS 973, Denver, CO 80225-0046, sgiles@usgs.gov, sgiles@usgs.gov

14

5:15 PM

PROBABILISTIC SEISMIC HAZARD ANALYSIS FOR CHERRY CREEK AND CHATFIELD DAMS, DENVER, COLORADO

LAFORGE, R.¹, OSTENAA, D.¹, O'CONNELL, Daniel R.H.², PALENSKY, J.³ and GEIBEL, N.³, (1)Fugro William Lettis & Associates, 1726 Cole Blvd, Suite 230, Lakewood, CO 80401, (2)Fugro William Lettis & Associates, 1726 Cole Blvd, Suite 230, Golden, CO 80401, (3)U.S. Army Corps of Engineers, 106 S 15th St, Omaha, NE 68102, r.laforge@fugro.com, r.laforge@fugro.com

T65. Advances in the Geology, Geochemistry, Geochronology, Isotope Geochemistry, Geophysics, Structural Geology, and Tectonics of Central Colorado