Fig.3. HT1 composite anomaly profile 1—schist of the second member of Yangxin formation;2—limestone of the first member of Yangxin formation;3—limestone of the second member of the Qujing formation;4—calcareous dolomite and limestone of the first member of the Qujing formation;5—carbonaceous slate of the second member of Pojiao formation;6—diabase;7—geologic boundary;8—fault and attitude;9—exploratory trench and numbers;10—industrial ore bodies and numbers;11—low-grade ore bodies and numbers