financially supported by the National Natural Science Foundation of China(grant no.42002105);the Shandong Provincial Bureau of Geology&Mineral Resources(grant no.KY201902);China Geological Survey(grant no.DD20190571);the Ministry of Science and Technology of China(grant no.2012CB416802)。
Objective The Zhangjiawa iron deposit is the largest-tonnage and representative iron skarn deposit,with proven reserves of 290 Mt at an average of 46%Fe(up to>65%),in the Laiwu district,eastern North China Craton(NCC)...