Research Article
Geochemical Characteristics of the Middle Devonian Dacaozi-Tanshanping Shale Strata in the Yanyuan Basin, Southwest China: Implications for Organic Matter Accumulation and Preservation
Figure 5
Discrimination of trace elements in different redox environments of shale in Well Yunningdi-1.
(a) |
(b) |
(c) |
(d) |