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Journal of Palaeogeography
Fig. 4 | Journal of Palaeogeography

Fig. 4

From: Continental chemical weathering during the Early Cretaceous Oceanic Anoxic Event (OAE1b): a case study from the Fuxin fluvio-lacustrine basin, Liaoning Province, NE China

Fig. 4

Source rock discrimination based on plots of a - Al2O3-TiO2 (adapted from Girty et al. 1996); b - La/Sc-Th/Co (adapted from Cullers 2002) and c - V-Ni-Th×10 (adapted from Bracciali et al. 2007) for mudstone samples of Shahai and Fuxin formations. Red circle - borehole DY-1; Blue circle - borehole FY-1. In Al2O3-TiO2 plot, mudstone samples near the intermediate and felsic igneous rock fields; La/Sc-Th/Co diagram indicates a primarily silicic source; The V-Ni-Th×10 plot reveals the domination of felsic source rocks and input of mafic source rocks

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