Goussin, Fanny; Guillot, Stéphane; Ruffet, Gilles; Poujol, Marc; Oliot, Émilien; Replumaz, Anne; Cordier, Carole; Dupont-Nivet, Guillaume; Roperch, Pierrick (2021): U-Pb isotopy data of deformed samples from the Yushu mélange, western Jinsha Suture [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.928990
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Published: 2021-03-11 • DOI registered: 2023-11-17
Abstract:
Deformed samples from the Yushu mélange, in the western Jinsha Suture, have been dated by U-Pb isotopy on zircons. This dataset presents U-Pb isotopy data obtained for these samples. The rock sample was crushed using standard procedures. The zircon grains were handpicked from the 80-200 micrometer non-magnetic fraction, placed on epoxy mounts and polished. Back-scattered electron images of the grains were acquired with a Hitachi S2500 Scanning Electron Microprobe at the Institut des Sciences de la Terre (ISTerre) of Grenoble (France). U-Pb zircon analyses were performed by in-situ LA-ICP-MS, using an ESI NWR193UC excimer laser coupled to a quadrupole Agilent 7700x ICP-MS at the GeOHeLiS analytical Platform (OSUR, Univ. Rennes). The diameter of the ablation spots varies from 20 to 30 µm, depending on the grain size. The repetition rate of the ablation was 3 Hz. Data were corrected for U-Pb and Th-Pb fractionation and for mass bias by repeated measurements of the standard GJ-1 (Jackson et al., 2004). Accuracy was monitored by analyses of the standard Plešovice (337.13 ± 0.37 Ma, Sláma et al., 2008), which produced a concordia age of 337.1 ± 2.1 Ma (N=18; MSWD=0.65) during the course of the analyses. Data reduction was carried out using the software Iolite v4 (Paton et al., 2010, 2011). The concordia ages and diagrams were generated using IsoplotR (Vermeesch, 2018). The full instrumental and analytical conditions can be found in Table "Operating conditions for the LA-ICP-MS equipment" and in Nosenzo et al. (2022).
Related to:
Goussin, Fanny; Guillot, Stéphane; Ruffet, Gilles; Poujol, Marc; Oliot, Émilien; Replumaz, Anne; Cordier, Carole; Dupont-Nivet, Guillaume; Roperch, Pierrick (2021): K-Ar isotopy data of deformed samples from the Yushu mélange, western Jinsha Suture [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.932623
References:
Horstwood, Matthew S A; Košler, Jan; Gehrels, George; Jackson, Simon E; McLean, Noah M; Paton, Chad; Pearson, Norman J; Sircombe, Keith; Sylvester, Paul; Vermeesch, P; Bowring, James F; Condon, Daniel J; Schoene, Blair (2016): Community‐Derived Standards for LA ‐ ICP ‐ MS U‐(Th‐)Pb Geochronology – Uncertainty Propagation, Age Interpretation and Data Reporting. Geostandards and Geoanalytical Research, 40(3), 311-332, https://doi.org/10.1111/j.1751-908X.2016.00379.x
Jackson, Simon E; Pearson, Norman J; Griffin, William L; Belousova, Elena A (2004): The application of laser ablation-inductively coupled plasma-mass spectrometry to in situ U–Pb zircon geochronology. Chemical Geology, 211(1-2), 47-69, https://doi.org/10.1016/j.chemgeo.2004.06.017
Nosenzo, Francesco; Manzotti, Paola; Poujol, Marc; Ballèvre, Michel; Langlade, Jessica (2022): A window into an older orogenic cycle: P–T conditions and timing of the pre‐Alpine history of the Dora‐Maira Massif (Western Alps). Journal of Metamorphic Geology, 40(4), 789-821, https://doi.org/10.1111/jmg.12646
Paton, Chad; Hellstrom, John C; Paul, Bence; Woodhead, Jon D; Hergt, Janet M (2011): Iolite: Freeware for the visualisation and processing of mass spectrometric data. Journal of Analytical Atomic Spectrometry, 26(12), 2508, https://doi.org/10.1039/C1JA10172B
Paton, Chad; Woodhead, Jon D; Hellstrom, John C; Hergt, Janet M; Greig, Alan; Maas, Roland (2010): Improved laser ablation U‐Pb zircon geochronology through robust downhole fractionation correction. Geochemistry, Geophysics, Geosystems, 11(3), 2009GC002618, https://doi.org/10.1029/2009GC002618
Sláma, Jiří; Košler, Jan; Condon, Daniel J; Crowley, James L; Gerdes, Axel; Hanchar, John M; Horstwood, Matthew S A; Morris, George A; Nasdala, Lutz; Norberg, Nicholas; Schaltegger, Urs; Schoene, Blair; Tubrett, Michael N; Whitehouse, Martin J (2008): Plešovice zircon — A new natural reference material for U–Pb and Hf isotopic microanalysis. Chemical Geology, 249(1-2), 1-35, https://doi.org/10.1016/j.chemgeo.2007.11.005
van Achterbergh, E; Ryan, C G; Jackson, Simon E; Griffin, William L (2001): Data reduction software for LA-ICP-MS. In: Sylvester, P (Ed.), Laser-ablation-ICPMS in the Earth Sciences: Principles and Applications, vol. 29. Mineralogical Association of Canada, 29, 239-243
Vermeesch, Pieter (2018): IsoplotR: A free and open toolbox for geochronology. Geoscience Frontiers, 9(5), 1479-1493, https://doi.org/10.1016/j.gsf.2018.04.001
Documentation:
Coverage:
Latitude: 33.059667 * Longitude: 96.911361
Date/Time Start: 2014-10-05T00:00:00 * Date/Time End: 2014-10-05T00:00:00
Minimum Elevation: 3900.0 m * Maximum Elevation: 3900.0 m
Event(s):
Comment:
Concordance was calculated as:
* if age>1 Ga: Conc%=(206Pb/238U Age x 100)/207Pb/235U Age and
* if age >1 Ga as: Conc%=(207Pb/235U Age x 100)/207Pb/206Pb Age
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1374 data points
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Datasets with similar metadata
- Goussin, F; Guillot, S; Ruffet, G et al. (2021): K-Ar isotopy data of deformed samples from the Yushu mélange, western Jinsha Suture. https://doi.org/10.1594/PANGAEA.932623
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- Braza, M; McQuarrie, N; Robinson, DM et al. (2023): (U-Th)/He ages from zircons collected in the far western Nepal Himalaya: raw data. https://doi.org/10.1594/PANGAEA.960123