1∶2 000 geological map and 1∶10 000 lithogeochemical survey covering 2.75 km² were completed in Justa area of Peru in 1997. Stratigraphic, structural and magmatic characteristics of this area were studied in detail, two mineralization areas and eight mineralization vein belts were outlined, in which ninety-six copper orebodies (veins) were delineated. Twenty-six copper anomalies were detected with the anomaly threshold of 800 ppm. Nos. 7, 8 and 13 copper anomalies form a large half egg pattern. Rocks in the mieralization area are rather broken and strongly altered. The half egg shape may represent the center of hydrothermal activity or mineralization. It was inferred that there might exist a huge primary copper ore body in the depth, and this predication was proved by Chariot Resources Limited which bought the Justa deposit in 2004 and announced that more than 2.6 million tones of copper were found on 28 February, 2006.