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24 results for “detrital zircon”
Data associated with the Tectonics manuscript "Building a Young Mountain Range: Insight into the Growth of the Greater Caucasus Mountains from Detrital Zircon (U-Th)/He Thermochronology and 10Be Erosion Rates"
<p>U-Pb and U-Th/He ages of zircons from a suite of detrital catchments reported in the manuscript "Building a Young Mountain Range: Insight into the Growth of the Greater Caucasus Mountains from Detrital Zircon (U-Th)/He Thermochronology and 10Be Erosion Rates" submitted to Tectonics. Repository includes sample locations and DEMs of each sampled catchment.</p>
Episodic evolution of a protracted convergent margin revealed by detrital zircon geochronology in the Greater Caucasus
<p class="MsoNormal">Convergent margins play a fundamental role in the construction and modification of Earth's lithosphere and are characterized by poorly understood episodic processes that occur during the progression from subduction to terminal collision. On the northern margin of the active Arabia-Eurasia collision zone, the Greater Caucasus Mountains provide an opportunity to study a protracted convergent margin that spanned most of the Phanerozoic and culminated in Cenozoic continental collision. However, the main episodes of lithosphere formation and deformation along this margin remain enigmatic. Here, we use detrital zircon U-Pb geochronology from Paleozoic and Mesozoic (meta)sedimentary rocks in the Greater Caucasus, along with select zircon U-Pb and Hf isotopic data from coeval igneous rocks, to link key magmatic and depositional episodes along the Caucasus convergent margin. Devonian to Early Carboniferous rocks were deposited prior to Late Carboniferous accretion of the Greater Caucasus crystalline core onto the Laurussian margin. Permian to Triassic rocks document a period of northward subduction and forearc deposition south of a continental margin volcanic arc in the Northern Caucasus and Scythian Platform. Jurassic rocks record the opening of the Caucasus Basin as a back-arc rift during southward migration of the arc front into the Lesser Caucasus. Cretaceous rocks have few Jurassic-Cretaceous zircons, indicating a period of relative magmatic quiescence and minimal exhumation within this basin. Late Cenozoic closure of the Caucasus Basin juxtaposed the Lesser Caucasus arc to the south against the crystalline core of the Greater Caucasus to the north and led to the formation of a hypothesized terminal suture. We expect this suture to be within ~20 kilometers of the southern range front of the Greater Caucasus because all analyzed rocks to the north exhibit a provenance affinity with the crystalline core of the Greater Caucasus.</p>
Episodic evolution of a protracted convergent margin revealed by detrital zircon geochronology in the Greater Caucasus
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Detrital zircon data for samples from western North Dakota
<p>This data table include all the detrital zircon data for samples from western North Dakota, that are associated with the Tectonics paper titled "Cenozoic sediment provenance in the northern Great Plains corresponds to four episodes of tectonic and magmatic events in the central North American Cordillera“ by Li and Fan. </p>
Disentangle the Sediment Mixing from Geochemical Proxies and Detrital Zircon Geochronology
<p>Supplementary Data of the Manuscript titled 'Disentangle the Sediment Mixing from Geochemical Proxies and Detrital Zircon Geochronology '</p>
Grain-size control on detrital zircon cycloprovenance in the late Paleozoic Paradox and Eagle basins, USA
<p>Detrital zircon U-Pb and grain size data for JGR: Solid Earth: "Grain size control on detrital zircon cycloprovenance in the late Paleozoic Paradox and Eagle basins, USA" by Ryan J. Leary, M. Elliot Smith, and Paul Umhoefer. </p>
Trace and rare-earth element composition of 2480 Ma detrital zircons in Proterozoic metapsammites from northwestern Arizona
<p>Detrital zircon grains in the ~1740-1750 Ma Vishnu Schist and similar rock units in northwestern Arizona consist of up to 30% grains dated by U-Pb isotopic analysis at 2470-2490 Ma. These zircon grains are distributed over ~40,000 km<sup>2 </sup>and define an age peak at 2480.0 ± 27.3 Ma (2SE). These grains have yielded unusually consistent <sup>207</sup>Pb/<sup>206</sup>Pb dates, with generally smaller analytical uncertainty and greater concordance to ideal U-Pb evolution than grains of other ages. A weighted mean age of 2480 ± 0.9 Ma (2SE) for this zircon population reflects consistent analytical results and high analytical precision but not the accuracy of the age. The source of these zircons has not been identified. To better characterize the unidentified source, we analyzed 45 of these grains for trace and rare-earth elements by laser-ablation mass spectrometry and scanned 16 grains with an electron microprobe to identify mineral inclusions. Mass spectrometer determinations of Sc/Yb and Nb/Sc support derivation from an oceanic-island igneous source. Electron microprobe scans revealed quartz in 5 of 16 grains, indicating a felsic source. The low variability in <sup>207</sup>Pb/<sup>206</sup>Pb dates and a generally linear relationship between U and Th support zircon derivation from a single igneous unit or closely related set of units without xenocrystic zircons. A literature search for other zircon populations with similar age and U/Th ratios identified ~2480 Ma zircons in a Mesoproterozoic(?) metapsammite and conglomerate in southwestern Montana. This sandstone was deposited near the margin of the Wyoming craton and contains almost entirely 2400-3600 Ma zircons, unlike zircon grains in Vishnu Schist which include a large population of 1730-1900 Ma zircons. From this relationship, we infer that the 2480 Ma zircons in both areas were derived from a source in the Wyoming craton. We conclude that the 2480 Ma Vishnu zircons were derived from a felsic batholith that formed above and from hotspot magma related to the ~2450-2480 Ma Matachewan Large Igneous Province, that this batholith formed by mixing between a mantle-derived hotspot magma and assimilated Archean continental crust, and that the source rock was emplaced during initial rifting between the Wyoming craton and the Superior province.</p>
Data of "Revisiting the Late Paleozoic–Mesozoic tectonic evolution of epicontinental eastern Central Asian Orogenic Belt on the basis of detrital zircon"
<p><strong>Ds01.</strong> Table S1. Zircon U–Pb isotopic and trace element data of mica-quartz schist (14JH12-1) from the Hulin Basin.</p> <p><strong>Ds02. </strong>Table S2. Zircon U–Pb isotopic and trace element data of fine sandstone (JHD53) from the Wandashan accretionary complex.</p> <p><strong>Ds03.</strong> Table S3. Zircon U–Pb isotopic and trace element data of sandy slate (JHD44) from the Wandashan accretionary complex.</p> <p><strong>Ds04.</strong> Table S4. Collected sedimentary rock samples and our samples in NE China, showing their original and renamed sample ID and dating data.</p>
FIGURE 4 in Fossil caddis cases from the lower Eocene Huachong Formation of the Sanshui Basin, Foshan City, Guangdong Province, South China with detrital zircon analyses
FIGURE 4. Relative probability plot of the detrital zircons from the Phanerozoic at the layer below the caddis cases.
FIGURE 1. Fossil locality. A, Locality map. B in Fossil caddis cases from the lower Eocene Huachong Formation of the Sanshui Basin, Foshan City, Guangdong Province, South China with detrital zircon analyses
FIGURE 1. Fossil locality. A, Locality map. B, The outcrop (red arrow point where the fossils collected), with hammer indicating the layer for zircon sampling.
FIGURE 5 in Fossil caddis cases from the lower Eocene Huachong Formation of the Sanshui Basin, Foshan City, Guangdong Province, South China with detrital zircon analyses
FIGURE 5. Weighted average ages of the four major peaks from the detrital zircons. A, 252.0 ± 1.7 Ma. B, 242.0 ± 1.8 Ma. C, 162.2 ± 1.3 Ma. D, 99.81 ± 0.39 Ma.
FIGURE 2 in Fossil caddis cases from the lower Eocene Huachong Formation of the Sanshui Basin, Foshan City, Guangdong Province, South China with detrital zircon analyses
FIGURE 2. Caddis case fossils from the Huachong Formation at the Sanshui Basin, South China. A, A small and complete caddis case (NIGP179890a). B, The counterpart of A (NIGP179890b). C, A nearly complete case (NIGP179891a). D, The counterpart of C (NIGP179891b). E, A case comprise of ostracods (NIGP179892).
FIGURE 3 in Fossil caddis cases from the lower Eocene Huachong Formation of the Sanshui Basin, Foshan City, Guangdong Province, South China with detrital zircon analyses
FIGURE 3. Cathodoluminescent (CL) images of selected representative zircons, showing their morphology and ages.
Trace and rare-earth element composition of 2480 Ma detrital zircons in Proterozoic metapsammites from northwestern Arizona
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Supplementary Information to Defining the Evolution of the Cocos-North America-Caribbean Triple Junction from Detrital Zircon Analysis - Zircons Dating
<p>Zircon Dating Dataset</p>
Compiled trace element compositions for magmatic zircons from I-type granitoids, S-type granitoids and TTGs, and detrital zircons
<p>Here we share the data of compiled global magmatic zircon trace element compositions for I-type granitoids, S-type granitoids, and TTGs. We also show compiled detrital zircon trace element compositions from the Gangdese magmatic belt, southern Tibet, the Western Dharwar Craton, southern India, and the Jack Hills, Australia.</p>
Detrital zircon U-Pb dating result
<p>This is a supplemenaty table and data for manuscript submitted to Tectonics.</p>
Compiled trace element compositions for magmatic zircons from I-type granitoids, S-type granitoids and TTGs, and detrital zircons
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Mixed eolian–longshore sediment transport in the late Paleozoic Arizona shelf and Pedregosa basin, USA: a case study in grain-size analysis of detrital-zircon datasets
<p>Detrital zircon and zircon grain size for "Mixed eolian–longshore sediment transport in the late Paleozoic Arizona shelf and Pedregosa basin, USA: a case study in grain-size analysis of detrital-zircon datasets" published in JSR. </p>
Combined magnetostratigraphic and detrital zircon U-Pb dating of the Tertiary Niubao Formation in the Bangong-Nujiang Suture Zone: Constraints on the amount of crustal shortening of the Tibetan Plateau since 60 Ma
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