The Precambrian record of southern Colorado: an integrated

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Presentation transcript:

The Precambrian record of southern Colorado: an integrated geologic database in ArcGIS Jamey Jones Department of Geological Sciences, UT Austin GIS & Water Resources Project Presentation December, 2002

Objectives: merge “old school” field geology with digital mapping techniques merge both large- and small-scale geologic mapping with published geochronology and other analytical data create an up-to-data, data-rich yet flexible map document within ArcGIS to aid geologists working in the Precambrian of Colorado (especially myself)

Why the Precambrian? Rocks are extremely old but represent levels of exposure not seen in recent and modern tectonic environments (10 – 20+ km deep) Relatively well exposed throughout the Rocky Mountains and southwestern U.S. Possible ancient analogs for recent and modern mountain belts

Data Sources: the geologic map of Colorado in ARC/INFO format (USGS OF-92-507) DEM coverage of southern Colorado from the National Elevation Dataset published and unpublished geochronologic and isotopic data for southern Colorado

Southern Colorado Wet Mts. Sangre de Cristo Mts. 500m contour interval

Sample identification and geochronology:

Relating geochronology and isotopic data

Analysis and Output: Yg Xg Mesoproterozoic magmatism Paleoproterozoic magmatism

Future directions: expand database/coverage to entire state of Colorado and possibly all Rocky Mountains and southwest U.S. expand scope of data to include other radiogenic systems, geochemical data, etc. incorporate new and more detailed mapping into basemap real-time digital mapping and data collection