四川发现特大金矿

Core Viewpoint - The exploration project of the Dongbeizhai gold mine in Songpan County, Sichuan Province, has been approved, revealing significant gold resources and marking it as the largest gold mine in Sichuan to date [1][3]. Group 1: Exploration Results - The recent evaluation indicates an additional gold resource of 28.24 tons, bringing the total confirmed gold resources to 81.06 tons [1]. - The average gold grade of the Dongbeizhai mine is reported to be 3.75 grams per ton, categorizing it as a super-large scale deposit [1]. Group 2: Historical Context - The Dongbeizhai gold mine was discovered in the 1970s and has undergone extensive exploration efforts, including nearly 100,000 meters of drilling and over 4,000 meters of tunnel excavation [3]. - A total of 35,000 samples have been collected throughout the exploration process, leading to significant breakthroughs in resource identification [3].