Abstract:

Yuerya gold mine is a large-sized gold deposit that exists in the small granitic body.In order to explore this kind of gold mine，by researching and summarizing the minerogenetic condition and regularity of Yuerya gold mine，and then using recourse method along the northeast trending fault zone that controls Yuerya rock mass，a northeast trending granite-porphyiy vein was found in Dongshan of Erhedian，which is aboat 7 km miles away from southwest of Yuerya gold mine.This granite-porphyry dyke is similar to the ore-bearing granitic body of Yuerya in macroscopic view and lithology according to this clue.Most quartz in this dyke is in the shape of hexagonal bipyramid and it is high temperature β quartz.This shows that there may be developing mesothermal granitic body deep in the Earth.Besides，there are two developing northwest trending gold-bearing quartz veins on the southern side of this dyke and the variation trend of grade and thickness indicates that ore-forming fluid forms in the deep part of this granite dike.Besides，a gold geochemical anomaly was delineated around this dike.Thus it can be seen that there may be a second developing gold-bearing granitic body deep in the earth.This also can provide clues and basis for geological survey of buried Yuerya gold mine.

Key words: buried gold ore, granite-porphyry dyke, Erhedian, Yuerya gold mine