Figure 7. Ternary plot of the concentrations of Hf/3-Th-Ta for the low-calcic black shales (l), n = 206. The diagram was used by Wood (1980) to determine provenance of basalts. Note that the field of the samples falls entirely in the field identified by Wood (and Wood et al., 1979) as calc-alkaline basalts associated with destructive plate margins.

Hf/3-Th-Ta

Graph Reader set for Net 4.7.

GRAPH READER
Hafnium/3 %
Thorium %
Tantinum%
Total
Pixel X

Pixel Y

For other Browsers, reset Max-Min boxes
using values from Pixel reader.

Graph Settings
Min X
Min Y
Max X
Max Y