Table 4.

Elemental microanalysis on points indicated in Figure 7.

Sample	Mass Percentage (wt %)
A	C: 36.6, O: 34.8, Au: 15.5
B	C: 59.9, O: 37.5, Au: 2.6
C	C: 37.1, O: 34.7, Ca:18.2, P: 7.7, Au: 2.3