Fig. 1. Mineral naming diagram of the amphibole group
^B(Mg, Fe²⁺, Mn²⁺, Li)≤0.50, ^B(Ca, Na)≤0.05, ^B(Na)<0.50,^BCa≥1.50, ^A(Na, K)<0.05,^A(Ca)<0.05,7.5≤Si⁴⁺≤8.0, 0.9≤Mg/(Mg+Fe²⁺)≤1

Fig. 2. The spider diagram of trace elements in Hetian Yu from various origins^[9,10,11,12]

Fig. 3. The REE distribution patterns in Hetian Yu from various origins^[9]

Fig. 4. (a) The three-dimensional scatter plot of δCe-ΣREE-LREE/HREE; (b) The two-dimensional scatter plot of δCe-ΣREE-LREE/HREE^[8]

Fig. 5. The canonical discriminant function diagram of the origin of trace elements

Fig. 6. The canonical discriminant function diagram of the origin of trace elements in Xinjiang, Qinghai, Liaoning, and Maxianshan

Fig. 7. The canonical discriminant function diagram of the origin of trace elements in Xinjiang, Qinghai, and Maxianshan