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| DISCUSSION ON THE METALLOGENETIC EPOCH AND ORE-FORMING MATTER SOURCE OF THE SILVER DEPOSITS IN YANSHAN AREA |
| LI Jiu-ming, GONG En-pu, YAO Yu-zeng, YU Hai-gang |
| School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China |
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Abstract The statistics and analysis on K-Ar ages and sulfur, lead and hydrogen-oxygen isotope data show that, the terrestrial volcanic-subvolcanic silver deposits in Yanshan area are obviously different from those in the eastern circum-Pacific belt. The metallogenetic epoch of the silver deposits in Yanshan area ranges from 195 to 100 Ma. The ore-forming matters are mainly deep-sourced, with addition of fundamental and cover material. The hydrothermal ore-forming solution is dominated by magmatic water mixed with meteoric water.
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Received: 20 April 2006
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2006, Vol. 15 
