Gold mine geological exploration work

1. Gold mining history

The study area is one of the main rock gold mining areas in Sichuan Province and has a long history of gold mining. From the late Qing Dynasty to the Republic of China, especially before liberation, when Liu Wenhui of the Kuomintang ruled the former Xikang Province, gold mining was at its most prosperous. Gold mines such as Huanghuangping and Laotaizi are heavily mined. There are dozens of old tunnels left, the deepest of which is more than 120m. Almost all other mining sites also have ancient gold mining relics of varying sizes. From after liberation to 1976, due to political, economic and other reasons, gold mining almost came to a standstill. In 1985, the three gold deposits of Huanghuangping, Sandiao and Baijintaizi were included in the first batch of preliminary infrastructure work plans by the State Gold Administration. Among them, the Huanghuangping gold mine with a daily processing capacity of 750 tons was completed and put into operation in 1993, making this area Rock gold production has entered the forefront of the province. In the past two years, gold mining fever has set off again. The country, collectives and individuals have joined forces to combine the earth and the ocean. There are hundreds of gold mining people inside and outside the province and locally. Gold deposits are scattered along both sides of the Dadu River in various gold deposits in the region. The annual gold output is estimated At least above 100kg. This area is rich in rock gold resources and easy to mine and sort. It is the main rock gold production base planned and constructed in Sichuan Province and is known as the "Dado River Golden Valley". The development of gold production not only provides important gold-finding clues to the geological work of gold mines, but also promotes the development of geological exploration work.

2. Gold mine geological exploration work

The gold mine geological exploration work in this area first started in the 1920s. Seniors in the geological circle, Tan Xichou, Li Chunyu, Li Chengsan, Liu Zuyi, etc. successively conducted research on Kangding Route surveys have been carried out in rock gold mines in , Danba and other places. Since the 1950s, the Ganzi Team, the Gold Mine Team, and the 402 Team of the Sichuan Provincial Geological Bureau have conducted varying degrees of exploration of gold deposits in the area and discovered a few gold deposits. Among them, preliminary exploration has been conducted on the Pengba placer gold deposit in Luding County. According to the investigation, only the rock gold deposits were explored. At that time, the level of exploration was very low. Only some clues of rock gold mineralization were found, but no prospects were identified. In the 1980s, geological science developed rapidly, and the theory of metamorphic migmatization was proposed for the Kangding complex in the area, which is the oldest crystalline basement of the Yangtze platform. At the same time, a large number of gold deposits and mineral spots were discovered in the gold mine survey. With the help of The experience of successively discovering a number of large and extra-large gold deposits in the Pre-Sinian crystalline basement at home and abroad has provided new enlightenment for re-understanding the mineralization geological conditions and prospects of this area. In the mid-to-late 1980s, gold mine evaluation work was carried out again, and deep engineering was boldly used. The company took the lead in completing a detailed investigation of the Huanghuangping gold deposit (medium size), and it has been mined and utilized, which has shown obvious socio-economic benefits, which has a great impact on the area's rock gold Geological exploration and breakthroughs played a driving role. Currently under general survey and exploration, there are gold deposits such as Sandiao, Baijintaizi, and Heijingtaizi, which fully demonstrate the regional mineralization prospects. The gold mine geological exploration work provided a wealth of gold mine geological data for this study.

3. Basic geology and gold mine geology research work

The research area belongs to the eastern area of ??Baoxing area of ??1:200000 area survey, 1:200000 area survey, heavy sand measurement, No. The second-generation geochemical survey has been completed. In addition, 1:50,000 river sediment measurements and 1:100,000 remote sensing geology were also completed. The above basic geological work laid the foundation for this research.

Since the 1980s, the Sichuan Provincial Bureau of Geology and Mineral Resources and geological colleges have carried out a series of gold mine geological research works. These research results have studied the metallogenic laws of gold deposits in this area from different angles. It also involves some basic geological research results, which have important reference value for the study of this book.