Table 1: Results from the energy-dispersive X-ray micro-analyzer system (EDX) for the Doushantuo nano-scale spheroids and fossils.

Element (A) Eight Specimens (B) Six Specimens （C）Twenty-Five Specimens (D)Two Specimens
wt% at% wt% at% wt% at% wt% at%
C 2.71-39.95 5.07-52.92 1.43-39.75 18.27-55.82 3.90-20.01 7.85-27.15 33.22-100 54.95-100
O 19.15-51.49 29.35-68.13 0.35-67.25 3.39-64.50 40.83-47.94 52.20-62.68 23.66 29.39
Mg 2.32-8.97 2.00-3.38 1.03-8.97 0.65-6.23 1.70-9.88 1.64-7.46
Ca 9.07-10.26 0.83-4.89 0.68-9.07 1.23-3.81 0.45-2.81 0.22-1.70 5.74 2.85
Fe 22.96-40.77 8.70-17.57 10.79-51.75 3.55-24.46 38.73 13.78
S 14.54-22.89 10.92-16.05 0.37-7.34 0.21-15.75
Si 4.73-18.67 4.06-11.21 19.39 1.40 3.67-11.68 2.90-7.63 -1.36 -0.96
Al 0.74-4.38 0.66-2.74 0.58-1.31 0.51-2.08

(A) Spheroids with pyritic molds and pyrite framboids (no coating). (B) Isolated and colony-like spheroids with no obvious ornamentation (four specimens had no coating and two had gold coating). (C) Soccer ball-like spheroids (no coating). (D) Jar-like bodies (gold coating).