Geochemical and mineralogical characteristics of magma-influenced early Permian coals from the Huanghebei coalfield, North China: provenance and critical element redistribution - Minglian Shen; Yuzhen Zhu; Huaihong Wang; Dongdong Wang; David French; Minglei Zhou; Lijun Shen; Yunhe Lv; Xue Liu; Xinbin Zhang; Chao Sun (International Journal of Coal Geology, 2026)