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Yangjiazhangzi molybdenum mine in Liaoning

Yangjiazhangzi molybdenum mine was discovered in the 1940s, is the earliest development of large molybdenum mine. Total proven reserves of molybdenum 117,500 t, a grade of 0.141% molybdenum. Molybdenum mineralization associated with rock often called "tongue protrusion" (protrusions rainbow Luoshan coarse granite batholith south), is composed of fine-grained porphyritic granite and granitic porphyry pluton composed. Since tongues southward across the rock contact zone, roughly following zoning character: fine-grained porphyritic granite and granitic porphyry → diopside skarn → diopside skarn garnet or garnet diopside skarn garnet skarn → → skarnization limestone. Mine has seen skarn skarn simple dry and wet skarn complex. A total of 39 molybdenum ore, mainly along bedded skarn complex distribution, a small part of the molybdenum ore bodies are often produced in different floor roof rock (limestone interbedded shales) between layers. Around the "tongues", which is in turn part of arcuate structure, secondary joints, cracks is developed, often become swollen parts of the ore body and molybdenum enrichment sites. Ore bodies bedded, skarn occurrence and formation and consistent. No. 6 ore mine long before Ridge 2150m, width 400m, thick 14.7m, orebody depth 550m. Molybdenite in the deposit was in the following manner outputs: ① was disseminated spread between skarn mineral grains, or cracks in garnet; ② output was fine veins pure molybdenite veinlets, molybdenite - veinlets of quartz and calcite veinlets containing molybdenite; ③ was thick daisy-like crystalline mineral molybdenite out. Wall rock alteration and the nature of the rock, skarn hydrothermal alteration are pyrite, chlorite, carbonation and silicification, with silicification and molybdenum mineralization closer relationship. Fine-grained porphyritic granite often has sericite and silicification. These effects lot more intense, molybdenum mineralization is also more intense. 
 

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