A study on heavy metals contamination of surfacial materials by environmental magnetism and chemical analysis in Antaibao Open Pit Coal Mine, Shanxi Province, ChinaManrong Chen, Shangyi Wang, Binbin Yu, Weiguo Zhang and Lizhong YuE3S Web Conf., 122 (2019) 05006DOI: https://doi.org/10.1051/e3sconf/201912205006