1. No. 1 Institute of Geology and Mineral Resources of Shandong Province, Jinan 250100, China
2. Shandong Engineering Research Center of High-Grade Iron Deposits Exploration and Exploitation, Jinan 250100, China
3. Shandong Provincial Bureau of Geology & Mineral Resources, Jinan 250000, China
4. Tianjin Center of China Geological Survey, Tianjin 300170, China
5. North China Center for Geoscience Innovation, China Geological Survey, Tianjin 300170, China
6. School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, China
7. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China