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Sampling locations of the Rio dos Remédios rhyolites. Figura 3. Localização dos pontos de coleta dos riolitos do Grupo Rio dos Remédios.

Sampling locations of the Rio dos Remédios rhyolites. Figura 3. Localização dos pontos de coleta dos riolitos do Grupo Rio dos Remédios.

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Figure 2. Simplified geological map of the Paramirim Aulacogen and the...
Figure 3. Sampling locations of the Rio dos Remédios rhyolites. Figura...
Figure 5. Color zoning observed in reflected light in the Rio dos...
Figure 8. Representative incremental color loss in the Rio dos Remédios...
+1 Figure 10. Stacked FT-IR absorption spectra of blue quartz grains the...
Blue quartz in Brazil: the Rio dos Remédios occurrence -preliminary study
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  • Jul 2022
Rock forming blue quartz occurrences are reported on all continents, but little is known about the specific causes for the coloration, and even less about its geological significance. The present study investigates the occurrence hosted by the metarhyolites of the Rio dos Remédios Group in order to determine the potential causes of the blue colorat...
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... investigated samples from the Rio dos Remédios Group were collected from outcrops located in the southwest of the State of Bahia, in the Canabravinha district, municipality of Paramirim, ca. 670 km west of the city of Salvador, the capital of the State of Bahia (Fig. ...