Goussin, Fanny; Cordier, Carole; Riel, Nicolas; Guillot, Stéphane; Boulvais, Philippe; Roperch, Pierrick; Replumaz, Anne; Schulmann, Karel; Dupont-Nivet, Guillaume; Rosas, Filipe; Zhaojie, Guo (2020): Whole-rock and mineral chemistry of magmatic rocks from the Nangqian basin (Eastern Tibet) [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.910791
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Published: 2020-01-14 • DOI registered: 2020-02-06
Abstract:
This dataset reports major and trace elements, Sr and Nd isotopic ratios, carbonate C and O isotopic ratios, and mineral chemistry of Eocene (~35 Ma) magmatic rocks from the Nangqian basin, Eastern Qiangtang, Central Tibet. Samples have microlithic to microphaneritic porphyritic textures. Trachydacites show K-feldspar, plagioclase and amphibole phenocrysts in a matrix of feldspar + amphibole + biotite + quartz + oxides; tranchyandesites show clinopyroxene, apatite and resorbed biotite phenocrysts in a matrix of feldspar + clinopyroxene + oxides. One intrusive outcrop of porphyritic syenite was also sampled, composed of clinopyroxene and biotite phenocrysts in a matrix of feldspar + clinopyroxene + biotite + apatite + oxides. Whole-rock major and trace elements were measured at ISTerre, University Grenoble Alpes. The SARM-CRPG in Nancy and SEDISOR in Brest performed the whole-rock Sr and Nd isotope analyses. In-situ major-element compositions of mineral phases were obtained using the JEOL JXA-8230 Electron Microprobe at ISTerre, University Grenoble Alpes. Stable isotope analysis of carbonates was carried out in the stable isotope laboratory of Geoscience Rennes, CNRS-University of Rennes I. These geochemical data suggest that the source of the Eocene magmas in Nangqian was a H2O- and CO2-enriched lithospheric mantle. A full discussion of the results can be found in the related article.
Supplement to:
Goussin, Fanny; Cordier, Carole; Riel, Nicolas; Guillot, Stéphane; Boulvais, Philippe; Roperch, Pierrick; Replumaz, Anne; Schulmann, Karel; Dupont-Nivet, Guillaume; Rosas, Filipe; Zhaojie, Guo (2020): Carbonated inheritance in the Eastern Tibetan lithospheric mantle: petrological evidences and geodynamic implications. Geochemistry, Geophysics, Geosystems, 21(2), e2019GC008495, https://doi.org/10.1029/2019GC008495
Coverage:
Median Latitude: 32.195724 * Median Longitude: 96.469746 * South-bound Latitude: 32.068110 * West-bound Longitude: 96.405720 * North-bound Latitude: 32.287610 * East-bound Longitude: 96.604890
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2 datasets
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Datasets listed in this publication series
- Goussin, F; Cordier, C; Riel, N et al. (2020): Whole-rock major and trace elements data, and whole-rock and carbonate isotope data, for the potassic and ultrapotassic rocks from Nangqian basin (Eastern Tibet). https://doi.org/10.1594/PANGAEA.910772
- Goussin, F; Cordier, C; Riel, N et al. (2020): Representative major element compositions of clinopyroxenes and phlogopites from ultrapotassic rocks from Nangqian basin (Eastern Tibet). https://doi.org/10.1594/PANGAEA.910790