| Reference Type | Journal (article/letter/editorial) |
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| Title | Chromogenic Mechanism and Formation of Zonal Genesis of Raspberry-Red Grossular from the Sierra de Cruces Range, Mexico |
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| Journal | Minerals |
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| Authors | Wu, Siyuan | Author |
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| Zhao, Siyi | Author |
| Zhao, Yi | Author |
| Zhang, Chenxi | Author |
| Year | 2025 (January 30) | Volume | < 15 > |
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| Page(s) | 138 | Issue | < 2 > |
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| Publisher | MDPI AG |
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| URL | |
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| DOI | doi:10.3390/min15020138Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 17973847 | Long-form Identifier | mindat:1:5:17973847:0 |
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| GUID | 0 |
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| Full Reference | Wu, Siyuan; Zhao, Siyi; Zhao, Yi; Zhang, Chenxi (2025) Chromogenic Mechanism and Formation of Zonal Genesis of Raspberry-Red Grossular from the Sierra de Cruces Range, Mexico. Minerals, 15 (2). 138 doi:10.3390/min15020138 |
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| Plain Text | Wu, Siyuan; Zhao, Siyi; Zhao, Yi; Zhang, Chenxi (2025) Chromogenic Mechanism and Formation of Zonal Genesis of Raspberry-Red Grossular from the Sierra de Cruces Range, Mexico. Minerals, 15 (2). 138 doi:10.3390/min15020138 |
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| In | Link this record to the correct parent record (if possible) |
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| Abstract/Notes | The raspberry-red grossular, discovered in the Sierra de Cruces in Coahuila, Mexico, is characterized by its zoned coloration, featuring a pink rim and a black mantle with a sharp color transition at the border. However, there is a notable lack of definitive and systematic identification characteristics pertaining to its special zones. The mineral chemical composition and chromogenic mechanism remain unsupported by empirical validation derived from specific experimental data. In this study, the gemological properties, chemical composition, and spectral characteristics are systematically analyzed to explore the chromogenic mechanism and formation of zonal genesis. The results of the X-ray diffraction pattern, Raman spectrum, and major elements’ composition show that the raspberry-red grossular samples are grossular with high purity. Mn ions are a direct coloring factor of the pink rim of the grossular samples, while Fe ions are chromogenic elements of the black mantle. The MnO content of the pink rim ranges from 0.15 wt% to 1.72 wt%. The FeO content of the black mantle ranges from 3.11 wt% to 5.09 wt%, which is generally higher than that of other parts. The trace element compositions reveal that the rim and core of samples were formed in an oxidative environment (δEu = 0.43–2.41), which could be derived from the hydrothermal metasomatic skarn (δ18O = 11.03–12.14); the mantles of samples were formed in a reducing environment (δEu = 0.42–0.85), which is consistent with the magmatic skarn (δ18O = 11.40–11.66). They also show that the surrounding rocks provide part of the compositional sources for the raspberry-red grossular and interact with the black mantle, which affects the formation of the pink rim. This study offers geological and mineral compositional insights, addressing a significant void in the study of raspberry-red grossular, and lays the foundation for follow-up investigations. |
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