## 4 Results
### Pyrite Chemistry
#### 4.2.2 Trace Element Composition  
The LA-ICP-MS trace element data for the Jiaojia pyrite are listed in Table 2.  
\begin{table}
\begin{tabular}{c|c c c c c c c c c c c c c c c} \hline \hline  & **Sample** & **Fe** & **Co** & **Ni** & **Cu** & **Pb** & **Sb** & **S** & **Au** & **Bi** & **As** & **Zn** & **Te** & **Ag** & **Total** \\ \hline Py-III & |J20-4-1-1 & 45.47 & 0.04 & 0.02 & \(\leq\)b.d.l. & \(\leq\)b.d.l. & \(\leq\)b.d.l. & 52.79 & 0.03 & 0.03 & 0.07 & \(\leq\)b.d.l. & \(\leq\)b.d.l. & \(\leq\)b.d.l. & 98.45 \\  & |J20-4-1-2 & 45.94 & 0.05 & \(\leq\)b.d.l. & \(\leq\)b.d.l. & 0.04 & \(\leq\)b.d.l. & 53.26 & 0.03 & 0.14 & 0.03 & \(\leq\)b.d.l. & \(\leq\)b.d.l. & \(\leq\)b.d.l. & 99.48 \\  & |J20-4-1-3 & 44.52 & 0.42 & 0.03 & \(\leq\)b.d.l. & \(\leq\)b.d.l. & 52.61 & 0.01 & 0.11 & 0.03 & \(\leq\)b.d.l. & \(\leq\)b.d.l. & 0.01 & 97.77 \\  & |J20-4-1-4 & 45.34 & 0.06 & \(\leq\)b.d.l. & 0.01 & \(\leq\)b.d.l. & 50.29 & \(\leq\)b.d.l. & 0.10 & \(\leq\)b.d.l. & 5-b.d.l. & 0.01 & 97.80 \\  & |J20-4-1-5 & 45.01 & 0.05 & \(\leq\)b.d.l. & 0.03 & 0.04 & \(\leq\)b.d.l. & 52.02 & 0.05 & 0.10 & \(\leq\)b.d.l. & \(\leq\)b.d.l. & \(\leq\)b.d.l. & 5-b.d.l. & 97.30 \\  & |J20-4-1-6 & 45.82 & 0.21 & \(\leq\)b.d.l. & 0.01 & 0.05 & \(\leq\)b.d.l. & 53.77 & \(\leq\)b.d.l. & 0.13 & 0.07 & \(\leq\)b.d.l. & 0.01 & \(\leq\)b.d.l. & 99.65 \\  & |J20-4-31 & 46.07 & 0.05 & \(\leq\)b.d.l. & \(\leq\)b.d.l. & 5-b.d.l. & 53.47 & 0.03 & 0.12 & 0.12 & \(\leq\)b.d.l. & 0.02 & \(\leq\)b.d.l. & 0.01 & 99.78 \\  & |J20-4-3-2 & 46.02 & 0.07 & \(\leq\)b.d.l. & 0.01 & \(\leq\)b.d.l. & 53.48 & \(\leq\)b.d.l. & 0.12 & 0.01 & \(\leq\)b.d.l. & \(\leq\)b.d.l. & \(\leq\)b.d.l. & 99.71 \\  & |J20-4-3-3 & 45.77 & 0.05 & \(\leq\)b.d.l. & 5-b.d.l. & 0.04 & 53.17 & 0.01 & 0.12 & 0.05 & 0.04 & \(\leq\)b.d.l. & 5-b.d.l. & 99.25 \\  & |J20-4-3-2 & 46.07 & 0.05 & \(\leq\)b.d.l. & 5-b.d.l. & 0.04 & 53.48 & 0.05 & 0.14 & 0.07 & 0.04 & \(\leq\)b.d.l. & 5-b.d.l. & 99.25 \\  & |J20-4-3-3 & 46.07 & 0.04 & 0.02 & 0.01 & 0.04 & 0.04 & 53.48 & 0.05 & 0.14 & 0.07 & 0.04 & \(\leq\)b.d.l. & 5-b.d.l. & 99.01 \\  & |J20-4-3-2 & 46.02 & 0.07 & \(\leq\)b.d.l. & 0.01 & 0.04 & 0.04 & 53.17 & 0.01 & 0.12 & 0.05 & 0.04 & \(\leq\)b.d.l. & 5-b.d.l. & 99.25 \\  & |J20-4-3-3 & 45.07 & 0.05 & \(\leq\)b.d.l. & 5-b.d.l. & 0.04 & 53.48 & 0.05 & 0.14 & 0.07 & 0.04 & \(\leq\)b.d.l. & 5-b.d.l. & 99.25 \\  & |J20-4-3-2 & 46.07 & 0.03 & 0.03 & 0.05 & 0.04 & 53.48 & 0.05 & 0.14 & 0.07 & 0.04 & \(\leq\)b.d.l. & 5-b.d.l. & 99.25 \\  & |J20-4-5-0 & 0.04 & 0.02 & 0.01 & 0.04 & 0.04 & 53.17 & 0.03 & 0.12 & 0.04 & 0.03 &  
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c c c} \hline \hline  & **Sample** & **Ti** & **Cr** & **Co** & **Ni** & **Co/Ni** & **Cu** & **Zn** & **As** & **Ag** & **Au** & **Cu/Au** & **Bi** \\ \hline Py I & [J20-5-1 & 21.00 & 4.94 & 285.00 & 153.00 & 1.  
Trace elements in the pyrite from the Jiaojia gold deposit were standardized using a primitive mantle [38] (Figure 6). The pyrites in the three mineralization stages showed a depletion of Ti, Cr, Cu, and Zn. Co was significantly enriched compared with Ni. As pyrite was enriched in the Jiaojia gold deposit, it increased from Stage I to III. Bi was enriched in the pyrite of the Jiaojia gold deposit, with values increasing from Stage I to II and decreasing from Stage II to III. In Stages I and II, the Co/Ni ratios were close to 1, and the range of variation was small. During Stage III, the Co/Ni varied widely (Figure 7). In the Jiaojia gold deposit, the Cu/Au ratio was greater than 1 during the mineralization stages.