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Journal Article
ACCEPTED MANUSCRIPT
Wei-Ran Li and others
Journal of Petrology, egaf033, https://doi.org/10.1093/petrology/egaf033
Published: 16 April 2025
Journal Article
ACCEPTED MANUSCRIPT
Wenyu Wang and others
Journal of Petrology, egaf036, https://doi.org/10.1093/petrology/egaf036
Published: 16 April 2025
Journal Article
ACCEPTED MANUSCRIPT
Jürgen Konzett and others
Journal of Petrology, egaf034, https://doi.org/10.1093/petrology/egaf034
Published: 16 April 2025
Journal Article
ACCEPTED MANUSCRIPT
Roger N Scoon and others
Journal of Petrology, egaf035, https://doi.org/10.1093/petrology/egaf035
Published: 11 April 2025
Journal Article
ACCEPTED MANUSCRIPT
Helena Albert and others
Journal of Petrology, egaf032, https://doi.org/10.1093/petrology/egaf032
Published: 10 April 2025
Journal Article
ACCEPTED MANUSCRIPT
Matthew Gleeson and others
Journal of Petrology, egaf031, https://doi.org/10.1093/petrology/egaf031
Published: 01 April 2025
Image
Published: 31 March 2025
Fig. 1 Geologic setting of the Skaergaard intrusion with schematic sections. (a) Geologic map of the Skaergaard intrusion, modified from McBirney (1989) with sample locations indicated by stars; white stars indicate samples of Skaergaard gabbroic rocks, purple stars indicate positions of granophyres, and
Image
Published: 31 March 2025
Fig. 4 Photomicrographs and SEM-CL images (insets) showing the textural settings of zircon in thin section in the Upper Border Series of the Skaergaard intrusion (all scale bars are 100 μm). (a) Skeletal zircon in LZa’ (SK08-190, XPL). (b) Irregular zircon crystal between quartz and alkali feldspar in LZa’
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Published: 31 March 2025
Fig. 9 Diagrams of Th vs U in zircon for all Skaergaard samples, granophyres, sills, and related rocks. The dashed lines in panels a–j represent constant values of Th/U. The average 2σ uncertainty in Th and U analyses is smaller than the analytical symbols. (a) Upper Border Series LZa’ (SK08-190), LZb’ (SK
Image
Published: 31 March 2025
Fig. 10 Diagrams of Ti vs Hf in zircon for all Skaergaard intrusion samples, granophyres, sills, and related rocks. The dashed horizontal lines represent Ti-in-zircon temperatures ( a SiO 2  = 1 for all samples, a TiO 2  = 1 for cumulates, a TiO 2  = 0.3–0.6 for granophyres and sills). The average 2σ unce
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Published: 31 March 2025
Fig. 15 Summary of thermometry estimates for zircon crystallization in the Skaergaard intrusion, granophyres, and sills (Sydtoppen, Tinden). (a) Box-and-whisker plot of Ti-in-zircon temperatures following Ferry & Watson (2007) for Skaergaard zircon (using a SiO 2  = 1 and a TiO 2  = 1) vs fraction o
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Published: 31 March 2025
Fig. 17 Selected incompatible trace element ratios for zircon from the Upper Border Series, Layered Series, and Marginal Border Series, Sandwich Horizon (+UZc’), granophyres, Tinden sill, and Sydtoppen sill. Data are shown only for analyses that have been filtered by removing those with chemical evidence of
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Published: 31 March 2025
Fig. 3 Photomicrographs of representative interstitial crystalline pockets (polyphase and granophyric) observed throughout the Upper Border Series, Sandwich Horizon, and Layered Series. All scale bars are 200 μm. Polyphase mineral assemblages (biotite, Fe–Ti oxides, quartz, alkali feldspar ± apatite, zirco
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Published: 31 March 2025
Fig. 5 Photomicrographs and SEM-CL images (insets) showing the textural settings of zircon in the Layered Series, Marginal Border Series, and Sandwich Horizon of the Skaergaard intrusion (all scale bars are 100 μm). Where scale bars are included in the CL images, the zircon grains are from mineral separate
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Published: 31 March 2025
Fig. 8 Summary of common mineral inclusions in Skaergaard zircon, including diagnostic trace element signatures, photographs of mineral separates (MS), SEM-CL images, and SEM-SE images. (a) Apatite inclusions in zircon from granophyre sample SEB87-215. (b) Nb-rich rutile inclusions in zircon from sample SE
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Published: 31 March 2025
Fig. 11 Chondrite-normalized REE patterns in zircon from the Skaergaard intrusion and related rocks. Average values for individual samples are represented by lines and symbols and the range of all values within a sample is indicated by shaded areas. Chondrite-normalizing values from McDonough & Sun (19
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Published: 31 March 2025
Fig. 16 Schematic diagrams showing the post-emplacement history of the Skaergaard intrusion recorded by zircon morphology and trace element geochemistry presented in this study. The shape of the Skaergaard intrusion is adapted from Nielsen (2004) and is approximately 8 km wide and 4 km thick in this east–
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Published: 31 March 2025
Fig. 18 Structural relationship between the Basistoppen sill and Skaergaard intrusion showing locations of relevant studied samples. (a) Inset geologic map of Skaergaard geology centered on Basistoppen Peak (modified from McBirney, 1989 ). Sample locations are indicated by white stars. Cross-section profil
Journal Article
EDITOR'S CHOICE
Nichole Moerhuis and others
Journal of Petrology, Volume 66, Issue 4, April 2025, egaf030, https://doi.org/10.1093/petrology/egaf030
Published: 31 March 2025
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Published: 31 March 2025
Fig. 2 Photographs showing representative sample locations, large-scale structures, and outcrop-scale features in the Skaergaard intrusion relevant to the studied samples. (a) Panorama taken in 1987 as viewed from the Wager Memorial on Skaergaardshalvø (approximately 68° 8′45.61″N, 31°44′51.58″W) looking n