U-Pb detrital zircon data for: lower Paleozoic sedimentary rocks near Silverton, CO USA
This Laser ablation ICPMS U-Pb detrital zircon data set supports mapping and stratigraphic interpretations of the Upper Devonian Ignacio Formation in southwestern Colorado (Silverton area). All samples were collected from a measured stratigraphic section called "Sultan Creek South" located at 37.710010 and -107.67530 (Evans and others, 2019). The Ignacio Formation was previously interpreted as Cambrian, but evidence that it is Devonian includes reexamined fossil data and detrital zircon U-Pb geochronology. The Ignacio Formation has a stratigraphic trend of detrital zircon ages shifting from a single ca. 1.7 Ga age peak to bimodal ca. 1.4 Ga and ca. 1.7 Ga age peaks, which represents local source-area unroofing history. Specifically, the upper plate of a Proterozoic thrust system (ca. 1.7 Ga Twilight Gneiss) was eroded prior to exposure of the lower plate (ca. 1.4 Ga Uncompahgre Formation). These results are a significant alternative interpretation of the geologic history of the southern Rocky Mountains.
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| bureauCode |
[ "010:12" ] |
| contactPoint |
{ "fn": "Christopher S Holm-Denoma", "@type": "vcard:Contact", "hasEmail": "mailto:cholm-denoma@usgs.gov" } |
| description | This Laser ablation ICPMS U-Pb detrital zircon data set supports mapping and stratigraphic interpretations of the Upper Devonian Ignacio Formation in southwestern Colorado (Silverton area). All samples were collected from a measured stratigraphic section called "Sultan Creek South" located at 37.710010 and -107.67530 (Evans and others, 2019). The Ignacio Formation was previously interpreted as Cambrian, but evidence that it is Devonian includes reexamined fossil data and detrital zircon U-Pb geochronology. The Ignacio Formation has a stratigraphic trend of detrital zircon ages shifting from a single ca. 1.7 Ga age peak to bimodal ca. 1.4 Ga and ca. 1.7 Ga age peaks, which represents local source-area unroofing history. Specifically, the upper plate of a Proterozoic thrust system (ca. 1.7 Ga Twilight Gneiss) was eroded prior to exposure of the lower plate (ca. 1.4 Ga Uncompahgre Formation). These results are a significant alternative interpretation of the geologic history of the southern Rocky Mountains. |
| distribution |
[ { "@type": "dcat:Distribution", "title": "Digital Data", "format": "XML", "accessURL": "https://doi.org/10.5066/P9SYHGUV", "mediaType": "application/http", "description": "Landing page for access to the data" }, { "@type": "dcat:Distribution", "title": "Original Metadata", "format": "XML", "mediaType": "text/xml", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.5d44aa89e4b01d82ce8dbe15.xml" } ] |
| identifier | http://datainventory.doi.gov/id/dataset/USGS_5d44aa89e4b01d82ce8dbe15 |
| keyword |
[ "Colorado", "Detrital Zircon", "East Lime Creek Conglomerate", "GGG", "Geochronology", "Geology, Geophysics, and Geochemistry Science Center", "Ignacio Formation", "LA-ICPMS", "Laser-Ablation Inductively-Coupled Mass Spectrometry", "Microbeam Laboratory", "Radiometric Dating", "SEM-cathodoluminescence", "San Juan Mountains", "Silverton", "Stratigraphy", "Sultan Creek", "Th", "Thorium", "U-Pb", "U.S. Geological Survey", "USGS", "USGS:5d44aa89e4b01d82ce8dbe15", "Uranium-Lead" ] |
| modified | 2020-08-20T00:00:00Z |
| publisher |
{ "name": "U.S. Geological Survey", "@type": "org:Organization" } |
| spatial | -107.67530, 37.710010, -107.67530, 37.710010 |
| theme |
[ "geospatial" ] |
| title | U-Pb detrital zircon data for: lower Paleozoic sedimentary rocks near Silverton, CO USA |
