Table 1 The results of XRF element analysis of surface points
Scan point number | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
Pb, Fe | Pb, Fe | Pb, Fe | Pb, Cu, Fe, Ca | Pb, Cu, Fe, Ca | Pb, Cu, Fe, Ca | Pb, Ca, Hg, Fe | Pb, Fe, Hg, Ca | Pb, Fe, Hg, Ca | Pb, Ca | Pb, Fe, Hg, Ca | Pb, Fe, Hg, Ca | Pb, Fe, Ca | Pb, Hg, Fe, Ca, Zn, Cu | Pb, Fe, Hg, Ca | Fe, Pb, Mn, Ca | Hg, Pb, Fe, Ca | Pb, Fe, Ca | Pb, Fe | Pb, Fe |