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Table 3. Comparison of the strongly immobile elements of the Zirve bauxite deposit in the Payas region with the Hawaiian alkali basalt [from Jackson et al. (1999) and Hofmann and Jochum (1996)], Upper Continental Crust [from Taylor and McLennan (1995)] and bauxite deposits from Milas (Turkey), Seydisehir and Bolkardagi (Turkey) regions. n = number of samples, n.d. = no data, data of the Milas, Seydisehir, and Bolkardagi bauxite deposits from Hanil¢i (2019), Sarkikaraaga¢ region deposits from Bozkur (2007).  ppm, which was 13.2 times higher than that in the alkali basalt composition, and much higher than the general concentration level of the first immobile group. The other element was uranium, which is generally mobile in surficial oxic conditions. Contrary to its mobility behavior, it had a 4.9-fold greater enrichment relative to that in the alkali basalt composition (Figure 14). The abnormal U (average of 4.4 ppm) concentration in the bauxite could have been associated with organic matter activity in the bauxite zone (average of TOT/C is 0.11 wt%), marked by low organic carbon contents and common pyrite formations at the bottom and top contacts of the bauxites. Such organic matter-rich levels within the bauxite contacts may have played a role in the late diagenetic uranium deposition that was transported by pore fluids (Long et al., 2018). Although they showed concentrations of Th and U, the mean Th and U values in the bauxite were very low when compared with the other bauxite deposits in Turkey, and even world bauxite deposits.
Table 3. Comparison of the strongly immobile elements of the Zirve bauxite deposit in the Payas region with the Hawaiian alkali basalt [from Jackson et al. (1999) and Hofmann and Jochum (1996)], Upper Continental Crust [from Taylor and McLennan (1995)] and bauxite deposits from Milas (Turkey), Seydisehir and Bolkardagi (Turkey) regions. n = number of samples, n.d. = no data, data of the Milas, Seydisehir, and Bolkardagi bauxite deposits from Hanil¢i (2019), Sarkikaraaga¢ region deposits from Bozkur (2007). ppm, which was 13.2 times higher than that in the alkali basalt composition, and much higher than the general concentration level of the first immobile group. The other element was uranium, which is generally mobile in surficial oxic conditions. Contrary to its mobility behavior, it had a 4.9-fold greater enrichment relative to that in the alkali basalt composition (Figure 14). The abnormal U (average of 4.4 ppm) concentration in the bauxite could have been associated with organic matter activity in the bauxite zone (average of TOT/C is 0.11 wt%), marked by low organic carbon contents and common pyrite formations at the bottom and top contacts of the bauxites. Such organic matter-rich levels within the bauxite contacts may have played a role in the late diagenetic uranium deposition that was transported by pore fluids (Long et al., 2018). Although they showed concentrations of Th and U, the mean Th and U values in the bauxite were very low when compared with the other bauxite deposits in Turkey, and even world bauxite deposits.
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