# Diagnosis of the Permian Fengcheng Formation in the Mahu Sag, Junggar Basin, China
## 4 Results
### Homogenization Temperature of Redmergnerite Primary Fluid Inclusions
Figure 4: Alkaline diagenesis characteristics in the Mahu Depression, Junggar Basin: (**a**) FN14-F2, wedge-shaped reedmergnerite is clustered together, and some of it contains residual calcite (Cal); (**b**) FN14-F2, rhomboid reedmergnerite with serrated edges; (**c**) FN14-F2, under cathodoluminescence, the reedmergnerite shows dark blue; (**d**) FN14-F2, reedmergnerite (Rd) metasomatis of shortite (St) from the edge; (**e**) AK1-F2, reedmergnerite (Rd) is symbiotic with tron (Tro); (**f**) FN14-F1, the edge of quartz grain is corroded into a serrated or bay shape; (**g**) MY1-F1, the internal surface of quartz was dissolved to form a “honeycomb” pit, 200 times; (**h**) MY1-F1, laumontite cemented between particles (Lmt). A total of 15 L-D fluid inclusions with relatively consistent gas-liquid ratios were detected in the growth band, forming three FIAs. The three FIAs showed consistent \begin{table}
\begin{tabular}{c c c c c c c c c c c c c c} \hline \hline
**Na\({}_{2}\)O** & **TiO\({}_{2}\)** & **SO\({}_{3}\)** & **SiO\({}_{2}\)** & **FeO** & **P\({}_{2}\)O\({}_{5}\)** & **Al\({}_{2}\)O\({}_{3}\)** & **MnO** & **K\({}_{2}\)O** & **MgO** & **BaO** & **CaO** & **B\({}_{2}\)O\({}_{5}\)** & **Total** \\ \hline
10.000 & - & - & 70.517 & - & - & - & - & 0.001 & 0.010 & 0.025 & - & 19.447 & 100 \\
10.000 & - & 0.010 & 69.767 & 0.028 & - & - & 0.043 & 0.012 & & - & - & 20.118 & 99.98 \\
13.794 & - & - & 71.165 & 0.009 & 0.025 & 0.047 & - & - & 0.007 & - & 0.005 & 14.948 & 100 \\
11.936 & 0.065 & - & 69.377 & 0.017 & 0.017 & 0.068 & - & 0.062 & 0.014 & 0.016 & 0.013 & 18.415 & 100 \\
10.012 & - & 0.162 & 69.697 & 0.020 & 0.017 & 0.086 & - & 0.088 & 0.027 & - & - & 19.891 & 100 \\
10.000 & 0.258 & - & 70.632 & - & - & 0.094 & 0.009 & 0.008 & 0.028 & 0.007 & - & 18.964 & 100 \\
10.063 & 0.080 & 0.031 & 70.288 & - & - & 0.010 & - & 0.015 & - & - & - & 19.513 & 100 \\
10.042 & - & 0.005 & 70.015 & 0.004 & - & 0.003 & 0.025 & 0.024 & - & - & 0.004 & 19.878 & 100 \\
10.072 & 0.032 & - & 64.868 & 0.009 & 0.017 & 0.004 & 0.024 & 0.021 & 0.018 & - & - & 20.935 & 96 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: EPMA data table of reedmergnerite (wt.%). Figure 5: Laser Raman spectroscopy of reedmergnerite. Figure 6: Fluid characteristics of the fluid inclusion in reedmergnerite. (**a**) FN2, reedmergnerite text. (**b**) FN2, Growth Zone (GZ) surrounded by fluid inclusions in reedmergnerite. (**c**) FN1, Cluster like distribution of fluid inclusions in reedmergnerite. (**d**) FN1, random distribution (RP) fluid inclusions in reedmergnerite. (**e**) FN3, long trail (LT) in cutting shortic crystals. (**f**) FN1, long trail (LT) in cutting reedmergnerite crystals. (**g**) FN1, long trail (LT) in cutting reedmergnerite crystals, gas liquid two-phase inclusions. (**h**) FN1, gas liquid two-phase inclusions. (**i**) FN1, long trail (LT) in cutting reedmergnerite crystals, liquid-dominated biphase-inclusisions(L-D). temperature measurement data (Table 3), and the homogenization temperature (Th) range of 15 L-D fluid inclusions was 100-116 \({}^{\circ}\)C (Figure 7).