Fig. 3

Chondrite-normalized rare earth element patterns for mudstones from the Shahai and Fuxin formations in Fuxin Basin. a - borehole DY-1; b - borehole FY-1. Chondrite normalization values are from Boynton (1984). Mudstones from the two boreholes have similar REE distribution patterns which show LREE enrichment, negative Eu anomaly and flat HREE distribution