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59 results for “geochronology”
Fig. 4. Miscellaneous postcranial elements. A in Paleontology and Geochronology of the Deseadan (late Oligocene) of Moquegua, Perú
Fig. 4. Miscellaneous postcranial elements. A, phorusrhacoid claw (MUSM 351), in lateral and plantar views; B, dasypodid osteoderm (MUSM 1604) from the articulating region of the carapace; C, macraucheniid metapodial (MUSM 349) in dorsal, lateral, and plantar views; and D, right cuboid (MUSM 669) in dorsal and medial views.
Geophysical and geochronological data files from the Cocos Plate
<p><strong>Supporting materials: Geophysical and geochronological data files from Cocos Plate study. </strong>Figure numbers refer to those published in Naif et al. (2023).</p> <p><em>SRTM_residual_bathymetry_Fig2b.grd</em> contains residual bathymetry data and metadata used to produce Fig. 2b. </p> <p><em>MGL0807-01.pstm-v2d.0.segy</em> contains multi-channel seismic data and metadata used to produce Fig. 4. </p> <p><em>s04_CSEM_Fig4b.mat</em> and <em>s10_CSEM_Fig4c.mat</em> contain CSEM data and metadata used to produce Fig. 4b and Fig. 4c.</p> <p>The following files contain CSEM inversion model used to produce Fig. S1 (the model can be plotted using the MARE2DEM code):</p> <ul> <li><em>lessLEM_corr159km.data</em></li> <li><em>perRxTxAll.15.resistivity</em></li> <li><em>perRxTxAll.15.resp</em></li> <li><em>perRxTxAll.poly</em></li> </ul> <p>The following files contain pdf figures, data and metadata from Ar/Ar geochronological measurements on core samples of gabbro sills from ODP Leg 205, Hole 1253A (used to produce Fig. S2): </p> <ul> <li><em>40Ar-39Ar Full raw data.xlsx</em></li> <li><em>40Ar-39Ar Full raw data.txt</em></li> <li><em>40Ar-39Ar_StepHeating-Run_30995-01_ODP-205-1253A-10R_FigS2a.pdf</em></li> <li><em>40Ar-39Ar_Isochron_Run_30995-01_ODP-205-1253A-10R_FigS2b.pdf</em></li> <li><em>40Ar-39Ar_StepHeating-Run_30998-01_ODP-205-1253A-34R_FigS2c.pdf</em></li> <li><em>40Ar-39Ar_Isochron_Run_30998-01_ODP-205-1253A-34R_FigS2d.pdf</em></li> </ul> <p><em>Residual_GEBCO2021_bathymetry_FigS3a.grd</em> and <em>Residual_v30_Gravity_FigS3b.grd</em> contain residual bathymetry and residual gravity data and metadata used to produce Fig. S3.</p>
Timing and provenance of volcanic fluxes around the Permian-Triassic Boundary Mass Extinction in South China: U-Pb zircon geochronology, volcanic ash geochemistry and mercury isotopes
<p>The enclosed dataset contains all of the raw data supporting the results presented in the paper titled: <strong>"Timing and provenance of volcanic fluxes around the Permian-Triassic Boundary Mass Extinction in South China: U-Pb zircon geochronology, volcanic ash geochemistry and mercury isotopes". </strong></p> <p>The Excel data file contains four data sheets as follows: </p> <p>1. Table S1: This sheet contains the U-Pb output table from ETRedux. The data sheet contains all the U and Pb isotopic data generated for the current study.</p> <p>2. Table S2: This excel sheet contains the geochemical compositions of analyzed volcanic ash beds as well as LOI-normalized major element compositions of these ashes.</p> <p>3. Table S3: This excel sheet contains the other geochemical and isotope data for all analyzed samples. This includes Hg concentration and isotope compositions, TOC data, as well as major and trace element concentrations and ratios.</p> <p>4. a final table containing the analyzed Hg isotope compositions for the utilized standard reference materials - ETH Fluka, UM-Almaden, NIST 1632D and MESS-3.</p>
Global zircon U-Th-Pb geochronology database
<p>We present here a database of zircon U−Th−Pb geochronology, which samples the global continental crust and spans nearly the entire Earth's history. This database collects ~2,000,000 geochronology records from ~12,000 papers and theses over a period exceeding 50 years and is by far the largest geochronology database to our knowledge. The lithology of the host rock of the zircon samples includes sedimentary, igneous, and metamorphic rocks. The source references are from the following academic publishers: Elsevier, Cambridge, Geological Society of London, Oxford, Springer, Taylor & Francis, Wiley, and China National Knowledge Infrastructure (CNKI). Here, the zircon data compilation contains "Database" files and a "References" file. The "Database" files contain about two million zircon U−Th−Pb dating records, including four isotope ratios (206Pb/238U, 207Pb/235U, 207Pb/206Pb, and 208Pb/232Th) and errors, four corresponding ages and errors, as well as sample information, dating instrument, dating reference material, host rock lithology, sampling location, and reference number. The "References" file contains the information of the source references corresponding to zircon geochronology records, including reference number, author, year, and other publication information. For each record in the "Database" files, its reference can be found in the "References" file through the reference number. This collection not only provides us with a comprehensive platform to study zircon chronological data in deep time and space but also makes it possible to explore the underlying geodynamic mechanism and the evolution of the Earth system.</p><p> </p><p>This database is a supplement to the following article:</p><p>Wu, Y., Fang, X., & Ji, J. (2023). A global zircon U–Th–Pb geochronological database. Earth Syst. Sci. Data, 15(11), 5171-5181. https://doi.org/10.5194/essd-15-5171-2023</p>
Geochronology and Geochemistry of Late Cenozoic Magmatism on Naozhou Island, Leiqiong Area: Implications for Deep Dynamic Processes
<p>The files of "Metadata 1" and "Metadata 2" are new measured data. The file of "References dataset" is published data from previous studies.</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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Data from: Redefining the Huayquerian Stage (Upper Miocene to Lower Pliocene) of the South American chronostratigraphic scale based on biostratigraphical analyses and geochronological dating
<p>The Huayquerian Stage of the South American chronostratigraphic scheme (named for the Huayquerías del Este, Argentina) was originally based on a poorly known mammal association of six taxa from the Huayquerías Formation. We studied the geology, age and fauna of the Neogene sequence in this area, including the Huayquerías, Tunuyán and Bajada Grande formations. The sequence comprises a monotonous succession of synorogenic epiclastic sediments deposited under arid to semi-arid conditions. Zircon U–Pb dates from 10 tuffaceous levels (7.2–1.6 Ma) place deposition of the Huayquerías Formation during the late Tortonian or Messinian to early Zanclean, the Tunuyán Formation during the Zanclean–Piacenzian, and the Bajada Grande Formation during the Piacenzian–Calabrian. We present 43 and 31 new mammal taxon records for the Huayquerías and Tunuyán formations, respectively. Progressive faunal change was observed along the sequence. The first records of the Chaco tortoise <em>Chelonoidis chilensis</em> and the notoungulate <em>Xotodon major</em>, and the latest records of Interatheriidae and <em>Typotheriopsis</em> (notoungulates), <em>Metacaremys calfucalel</em>, <em>Phtoramys hidalguense</em> and <em>Lagostomus pretrichodactyla</em> (rodents), <em>Chasicotatus ameghinoi</em> and <em>Macroeuphractus morenoi</em> (xenarthrans) are reported. The faunal associations of the Huayquerías and lower Tunuyán formations are highly similar to each other, and to other coeval localities in Argentina. The <em>Macroeuphractus morenoi</em> Assemblage Biozone is proposed as the basis for redefining the Huayquerian Stage, due to the co-occurrence of three taxa with wide geographical distribution in southern South America: <em>Macroeuphractus morenoi</em>, <em>Pseudotypotherium subinsigne</em> and <em>Lagostomus pretrichodactyla</em>. The age of this biozone is constrained at <em>c.</em> 8–5 Ma in its type area.</p>
Datasets of mineral composition and geochronological result of Barrovian metamorphic sequence rocks in the Ailao Shan massif
<p>This file includes the supporting information of the manuscript titled“Thermal and physical properties of Barrovian metamorphic sequence rocks in the Ailao Shan-Red River shear zone, and implications for crustal channel flow”</p>
Dataset for "Protracted subduction of the European hyperextended margin revealed by rutile U-Pb geochronology across the Dora-Maira massif (W. Alps)"
<p>Dataset for "Protracted subduction of the European hyperextended margin revealed by rutile U-Pb geochronology across the Dora-Maira massif (W. Alps)"</p> <p>- Sample location</p> <p>- Rutile U-Pb-trace-element analyses</p> <p>- Titanite U-Pb-trace-element analyses</p>
Geochronological and Geochemistry data from BC eruption of Changbaishan-Tianchi volcano
<p>It is raw data of geochronological and geochemistry data of Bingchang eruption of Changbaishan-Tianchi volcano. The geochronological data was determined by the <sup>40</sup>Ar/<sup>39</sup>Ar methods. The geochemistry data were analyzed by Electron Probe Micro-analyzer (EPMA) using a Cameca SX-100 electron microprobe at Oregon State University (OSU), USA. </p>
Dataset for Cox et al. (2022), "Short communication: Mechanism and prevention of irreversible trapping of atmospheric He during mineral crushing," Geochronology 2021-42
<p>Dataset for Cox, S. E., Miller, H. B. D., Hofmann, F., and Farley, K. A.: Short Communication: Mechanism and Prevention of Irreversible Trapping of Atmospheric He During Mineral Crushing, Geochronology, https://doi.org/10.5194/gchron-2021-42, 2022.</p>
Evidence of Jurassic extension in NW Argentina: Characterization of fault-related strata at the Salta Group base using sandstone provenance and zircon U–Pb geochronology
<p>Supporting information accompanying the publication "Evidence of Jurassic extension in NW Argentina: Characterization of fault-related strata at the Salta Group base using sandstone provenance and zircon U–Pb geochronology" published in Journal of South American Earth Sciences. The dataset contains information on analytical procedures of detrital zircon U-Pb analyses.</p>
Published and new Geochronology, Thermochronology, Geodetic, and Earthquake Data from the Fairweather Transform Region
<p>Published and new Geochronology, Thermochronology, Geodetic, and Earthquake Data from the Fairweather Transform Region used in <strong>Benowitz, J., </strong>Lease, R., Hauessler, P., Pavlis, P., Mann, M., Fairweather Transform Orogenesis: 25 million years of Crustal-block vertical extrusion and double indenter tectonics since ca. 3 Ma., for <i>Tectonophysics</i>.</p>
Geochronological and geochemical data of volcanic deposits of the Central Main Ethiopian Rift
<p>This database represents a collection of geochronological data, geochemistry of bulk rocks and melt inclusions from a large set of samples collected in the framework of two field surveys (2019, 2020) in the Central Main Ethiopian Rift.</p> <p>This dataset provides supporting information to the paper:<br>Franceschini Z., Cioni R., Scaillet S., Prouteau G., Corti G., Sani F., Mondanaro A., Frascerra D., Melaku A.A., Scaillet B., Oppenheimer C., Duval F. (2024) "Pulsatory volcanism in the Main Ethiopian Rift and its environmental consequences", Nature Communications Earth and Environment.</p> <p>The samples have been prepared for the different analyses at the Department of Earth Sciences of the University of Florence. The geochronological analyses building up the dataset have been performed at the Argon facility at the Institut des Sciences de la Terre d'Orléans (ISTO), in France. The analythical methods related to the 40Ar/39Ar analyses are described in detail in the above mentioned paper.<br>The geochemical dataset contains the results of major and trace elements concentrations on whole rock samples (performed at the Service d'Anlayse des Roches et des Mineraux -CNRS - CRPG of Nancy, in France) and major elements and volatile concentrations of melt inclusions belonging to four ignimbrite samples (analysed with an Electron Micro Probe Analyzer housed at the laboratories of the Institut des Sciences de la Terre d'Orléans, in France).</p> <p>These datasets have been performed in the frame of a PhD fellowship (granted to Zara Franceschini) funded by the Università Italo Francese (Bando Vinci 2018, n. C3-1717) and also partially supported by the Italian Ministero dell'Università e della Ricerca (MiUR) through PRIN grant 2017P9AT72.</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>
Geochronological and geochemical data for Late Triassic granitic rocks in Central Qiangtang
<p>Supplementary Table 1. Zircon isotopic LA-ICP-MS analyses for the granitoid samples.</p> <p>Supplementary Table 2. Major (wt.%) and trace element (ppm) compositions of the granitoid samples.</p> <p>Supplementary Table 3. Hf isotopes of zircons of the granitoid samples.</p> <p>Supplementary Table 4. Summary of age data for the Late Triassic magmatic rocks and metamorphic rocks in the Central Qiangtang.</p>
Toba Caldera geochronological and modelling dataset
<p>Bayesian statistical analysis and inverse thermal history modeling of feldspar <sup>40</sup>Ar/<sup>39</sup>Ar and zircon (U-Th)/He ages reveal that post-caldera dome eruptions at Toba Caldera, Sumatra occurred up to ca. 13.6 kyr later than indicated by <sup>40</sup>Ar/<sup>39</sup>Ar feldspar ages. This discordance implies cold storage of feldspar antecrysts prior to eruption for a maximum duration of ca. 5 and 13 kyr at between 280°C and 500°C. These findings connote that the solidified carapace of remnant magma after the Youngest Toba Tuff (YTT) eruption ~74 ka erupted in a subsolidus state, without being thermally remobilized or rejuvenated. Our data mean that resurgent uplift and volcanism initiated approximately 5 kyrs after the climactic YTT eruption, thus providing rare constraints on resurgence after a cataclysmic supereruption. Our approach has the potential to reveal complexities in pre-eruptive storage and eruption at unprecedented temporal resolution with implications for active restless calderas and young silicic volcanoes worldwide.</p>
Supplementary material to: Using UAV-based photogrammetry coupled with in-situ fieldwork and U-Pb geochronology to decipher multi-phase deformation processes: A case study from Sarclet, Inner Moray Firth Basin, UK.
<p>This dataset represents the supplementary material to: Using UAV-based photogrammetry coupled with in-situ fieldwork and U-Pb geochronology to decipher multi-phase deformation processes: A case study from Sarclet, Inner Moray Firth Basin, UK.</p> <p>Appendix A - This appendix represents the 3D Digital Outcrop Modell (DOM) of Sarclet ‘The Haven and The Stack’ locality in 3D PDF format.<br> Appendix B - This appendix represents the 3D Digital Outcrop Modell (DOM) of Sarclet ‘Muiri Geo’ lo-cality in 3D PDF format.<br> Appendix C - This appendix represents the 3D Digital Outcrop Modell (DOM) of Sarclet ‘The Haven and The Stack’ locality in .obj format.<br> Appendix D - This appendix represents the 3D Digital Outcrop Modell (DOM) of Sarclet ‘Muiri Geo’ lo-cality in .obj format.<br> Appendix E - This appendix represents the orthomosaic of Sarclet ‘Muiri Geo’ locality in GeoTiff format.<br> Appendix F - This appendix represents the orthomosaic of Sarclet ‘Muiri Geo’ locality in GeoTiff format.<br> Appendix G - This appendix represents the analytical conditions and geochronology data of the studied samples.</p>
Alaska Range Suture Zone Compiled Geochronology data set
<p>Geochronology data set for the manuscript, <strong><em>Upper-plate Controls on Slab Geometry, Melt Ponding, and Structurally Compelled Localized Alaska Range Suture Zone Arc Magmatism Since ca. 100 Ma, </em></strong> submitted to <em>Tectonics and seismicity of Alaska and Western Canada: Earthscope and beyond</em>."</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.