Item talk:Q270946
From geokb
{
"USGS Publications Warehouse": {
"@context": "https://schema.org",
"@type": "Article",
"additionalType": "Journal Article",
"name": "Monazite and xenotime petrochronologic constraints on four Proterozoic tectonic episodes and ca. 1705 Ma age of the Uncompahgre Formation, southwestern Colorado, USA",
"identifier": [
{
"@type": "PropertyValue",
"propertyID": "USGS Publications Warehouse IndexID",
"value": "70246674",
"url": "https://pubs.usgs.gov/publication/70246674"
},
{
"@type": "PropertyValue",
"propertyID": "USGS Publications Warehouse Internal ID",
"value": 70246674
},
{
"@type": "PropertyValue",
"propertyID": "DOI",
"value": "10.1130/GES02631.1",
"url": "https://doi.org/10.1130/GES02631.1"
}
],
"journal": {
"@type": "Periodical",
"name": "Geosphere",
"volumeNumber": "19",
"issueNumber": "4"
},
"inLanguage": "en",
"isPartOf": [
{
"@type": "CreativeWorkSeries",
"name": "Geosphere"
}
],
"datePublished": "2023",
"dateModified": "2023-08-23",
"abstract": "The Proterozoic tectonic evolution of the south-western USA remains incompletely understood due to limited constraints on the timing and conditions of the tectono-metamorphic phases and depositional age of metasedimentary successions. We integrated multi-scale compositional mapping, petrologic modeling, and in situ geochronology to constrain pressure-temperature-time paths from samples of Paleoproterozoic basement gneisses and overlying quartzites in southwestern Colorado, USA. Basement gneiss from the western Needle Mountains records metamorphic conditions of 600 \u00b0C at 0.75 GPa at 1764 \u00b1 9 Ma and ~575 \u00b0C at 1741 \u00b1 10 Ma. Gneiss sampled from drill core near Pagosa Springs, Colorado, records conditions of 700 \u00b0C at 1748 \u00b1 9 Ma, 800 \u00b0C at 1.1 GPa at 1650 \u00b1 40 Ma, 540 \u00b0C at 1570 \u00b1 36 Ma, and 440 \u00b0C at 1424 \u00b1 12 Ma. The Uncompahgre Formation was deposited at ca. 1705 Ma, as constrained by detrital monazite (1707 \u00b1 8 Ma) and xenotime (1692 \u00b1 40, 1725 \u00b1 50 Ma), metamorphic xenotime (1650 \u00b1 10 Ma), and published\u00a040Ar/39Ar and detrital zircon data. Compositions of ca. 1705 Ma detrital monazite and xenotime are consistent with derivation from a garnet-bearing source in the Yavapai orogenic hinterland. The Vallecito Conglomerate and Uncompahgre Formation record macroscopic folding and greenschist-facies metamorphism at 1650 \u00b1 10 Ma and temperatures of 270 \u00b0C to >570 \u00b0C at 1470\u20131400 Ma. Laser ablation\u2013inductively coupled plasma\u2013mass spectrometry (LA-ICP-MS) zircon geochronology yielded dates of 1775 \u00b1 18 Ma from the Twilight Gneiss and 1696 \u00b1 7 Ma from the Bakers Bridge Granite, supporting previous isotope dilution\u2013thermal ionization mass spectrometry (ID-TIMS) dates. The Eolus Granite yielded a date of 1463 \u00b1 6 Ma, which is older than previous 1.44\u20131.43 Ga ID-TIMS dates. The newly dated granite of Cataract Gulch is 1421 \u00b1 12 Ma. In situ analysis of detrital and metamorphic monazite and xenotime, igneous zircon, and quantitative thermobarometry, integrated with previously published constraints, indicate multiple tectonic episodes after the emplacement of 1800\u20131760 Ma arc-related rocks. The region experienced greenschist- to amphibolite-facies metamorphism (M1) from 1760 Ma to 1740 Ma, which was followed by the intrusion of granites at 1730\u20131695 Ma and deposition of the Uncompahgre Formation at ca. 1705 Ma, contemporaneous with the Yavapai orogeny. Metamorphism at 1680\u20131600 Ma was characterized by greenschist-facies conditions near Ouray, Colorado, and granulite-facies conditions near Pagosa Springs (M2) during the Mazatzal orogeny. From 1470 Ma to 1400 Ma, greenschist- to amphibolite-facies metamorphism (M3) and largely granitic plutonism occurred during the protracted Picuris orogeny. These results demonstrate the power of monazite and xenotime analyses to constrain depositional ages, provenance, and pressure-temperature-time (P-T-t) paths to resolve the compound orogenic history that is characteristic of most mountain belts.",
"description": "23 p.",
"publisher": {
"@type": "Organization",
"name": "Geological Society of America"
},
"author": [
{
"@type": "Person",
"name": "Hillenbrand, Ian William",
"givenName": "Ian William",
"familyName": "Hillenbrand",
"identifier": {
"@type": "PropertyValue",
"propertyID": "ORCID",
"value": "0000-0003-2801-3674",
"url": "https://orcid.org/0000-0003-2801-3674"
},
"affiliation": [
{
"@type": "Organization",
"name": "Geosciences and Environmental Change Science Center",
"url": "https://www.usgs.gov/centers/geosciences-and-environmental-change-science-center"
}
]
},
{
"@type": "Person",
"name": "Williams, Michael L.",
"givenName": "Michael L.",
"familyName": "Williams",
"affiliation": [
{
"@type": "Organization",
"name": "UMass Amherst"
}
]
},
{
"@type": "Person",
"name": "Karlstrom, Karl E.",
"givenName": "Karl E.",
"familyName": "Karlstrom",
"affiliation": [
{
"@type": "Organization",
"name": "University of New Mexico"
}
]
},
{
"@type": "Person",
"name": "Gilmer, Amy K.",
"givenName": "Amy K.",
"familyName": "Gilmer",
"identifier": {
"@type": "PropertyValue",
"propertyID": "ORCID",
"value": "0000-0001-5038-8136",
"url": "https://orcid.org/0000-0001-5038-8136"
},
"affiliation": [
{
"@type": "Organization",
"name": "Geosciences and Environmental Change Science Center",
"url": "https://www.usgs.gov/centers/geosciences-and-environmental-change-science-center"
}
]
},
{
"@type": "Person",
"name": "Lowers, Heather A. hlowers@usgs.gov",
"givenName": "Heather A.",
"familyName": "Lowers",
"email": "hlowers@usgs.gov",
"identifier": {
"@type": "PropertyValue",
"propertyID": "ORCID",
"value": "0000-0001-5360-9264",
"url": "https://orcid.org/0000-0001-5360-9264"
},
"affiliation": [
{
"@type": "Organization",
"name": "Geology, Geophysics, and Geochemistry Science Center",
"url": "https://www.usgs.gov/centers/gggsc"
},
{
"@type": "Organization",
"name": "Central Mineral and Environmental Resources Science Center",
"url": "https://www.usgs.gov/centers/gggsc"
}
]
},
{
"@type": "Person",
"name": "Jercinovic, Michael J.",
"givenName": "Michael J.",
"familyName": "Jercinovic",
"affiliation": [
{
"@type": "Organization",
"name": "University of Massachusetts - Amherst"
}
]
},
{
"@type": "Person",
"name": "Suarez, Kaitlyn",
"givenName": "Kaitlyn",
"familyName": "Suarez",
"affiliation": [
{
"@type": "Organization",
"name": "University of Massachusetts - Amherst"
}
]
},
{
"@type": "Person",
"name": "Souders, Amanda (Kate)",
"givenName": "Amanda (Kate)",
"familyName": "Souders",
"identifier": {
"@type": "PropertyValue",
"propertyID": "ORCID",
"value": "0000-0002-1367-8924",
"url": "https://orcid.org/0000-0002-1367-8924"
},
"affiliation": [
{
"@type": "Organization",
"name": "Geology, Geophysics, and Geochemistry Science Center",
"url": "https://www.usgs.gov/centers/gggsc"
}
]
}
],
"funder": [
{
"@type": "Organization",
"name": "Central Mineral and Environmental Resources Science Center",
"url": "https://www.usgs.gov/centers/gggsc"
},
{
"@type": "Organization",
"name": "Geosciences and Environmental Change Science Center",
"url": "https://www.usgs.gov/centers/geosciences-and-environmental-change-science-center"
},
{
"@type": "Organization",
"name": "Geology, Geophysics, and Geochemistry Science Center",
"url": "https://www.usgs.gov/centers/gggsc"
}
],
"spatialCoverage": [
{
"@type": "Place",
"additionalType": "country",
"name": "United States",
"url": "https://geonames.org/4074035"
},
{
"@type": "Place",
"additionalType": "state",
"name": "Colorado"
},
{
"@type": "Place",
"geo": [
{
"@type": "GeoShape",
"additionalProperty": {
"@type": "PropertyValue",
"name": "GeoJSON",
"value": {
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"properties": {},
"geometry": {
"coordinates": [
[
[
-107.5,
38.0
],
[
-107.5,
37.3
],
[
-107.2,
37.3
],
[
-107.2,
38.0
],
[
-107.5,
38.0
]
]
],
"type": "Polygon"
}
}
]
}
}
},
{
"@type": "GeoCoordinates",
"latitude": 37.65,
"longitude": -107.34999999999997
}
]
}
]
}
}
