Title: Discussion on genetic type of Dongwujiazi gold deposit of Chaoyang,Liaoning
Abstract: The surrounding rocks of Dongwujiazi gold ore vein are mainly metamorphic intermediate-basic volcanic rocks in Jianping Group of Archean.Veins,wall rocks,dike rocks and regional magmatic rocks all exhibit negative Eu anomaly(δ Eu is 0.2~0.4),LREE/HREE is 3.4~11.6,(La/Yb)N is 6.2~40.7.The differential degree of light-heavy REE is high,and the distribution pattern is right incline,which indicate an inheritance relationship in material sources.The δ34S in pyrite and galena range from 1.91×10-3 to 3.14×10-3,showing the mantle sulfur feature.Projection points of δD and δ18O locate between magmatic water and meteoric water,presenting the characteristic of magmatic water plays a dominant role,and meteoric water mixed in later stage.Forming temperature is 144.6 ℃~183 ℃,mineralizing pressure is 41.8×106 ~46.0×106 Pa,and mineralizing depth is 5.12~5.39 km,it is recognized that the deposit belongs to middle-hypabyssal deposit of orogenic gold deposit.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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