The only proven independent selenium deposit in the world
The selenium ore and selenium-containing stone coal resources in Enshi City are rich in Permian siliceous carbonaceous shale, and are rich in the combination of selenium, vanadium and molybdenum. Shuanghe Yutangba selenium deposit, located 73km southeast of Enshi City, is an independent selenium deposit with considerable scale explored by the Second Geological Brigade of Hubei Bureau of Geology and Mineral Resources from March 65438 to May 65438, 2008. The discovery and exploration of this deposit filled the gap that there is no independent selenium deposit in the world.
The geological proven selenium deposit is located in the middle of the northwest wing of Shuanghe syncline, and the main deposit is plate structure. The core mining area is 6 kilometers long, 0.5 kilometers wide/kloc-0, and covers an area of 0.88 square kilometers. The average selenium content is 3637.5mg/kg, the selenium grade is 230-6300mg/kg, 45.699 tons of metal selenium (industrial pure selenium) with industrial exploitation value has been proved, and the highest selenium content in Yutangba rock is 6300mg/kg. It is 1 1 times of the highest selenium-containing rock found abroad, rewriting the academic judgment that selenium cannot form an independent industrial deposit. Enshi Shuanghe Yutangba selenium mine has become the only rare independent industrial selenium mine in the world so far.
Selenium is widely used in industry. Industrial selenium is widely used in ceramics, pigments, optics, solar energy, batteries, chemicals, feeds, health products, bio-fertilizers, biopharmaceuticals, cosmetics and other industries, and is called industrial vitamins.
The world's first natural selenium-enriched biosphere
The accumulation of selenium-enriched soil, selenium-enriched mountain spring water and selenium-enriched animal and plant resources in Enshi has formed a natural selenium-enriched biosphere. The selenium content of plants, animals and microorganisms grown here is obviously higher than that of similar species in other parts of the world.
In 2009, the Institute of Geographical Sciences and Resources of Chinese Academy of Sciences conducted an investigation on selenium-rich rock strata, soil and crops in Enshi, and confirmed that Permian selenium-containing stone coal (selenium-containing carbonaceous shale) exposed in Enshi was the main factor causing selenium-rich soil, groundwater, surface water and crops in its rock distribution area. Selenium-containing stone coal (selenium-containing carbonaceous shale) is exposed in high selenium areas such as Xintang Township, Hongtu Township, Shadi Township, Baiyangping Township, Banqiao and Mufuji Town in Enshi City. The downstream of the bare area is farmland suitable for cultivation, which is controlled layer by layer, forming a three-dimensional distribution of natural biological selenium resources. A large number of exposed selenium-containing stone coal in Enshi migrated to soil and water after weathering and rainfall, which made the average selenium content and area of soil, grain crops, forage, livestock and poultry products, Chinese herbal medicine and mountain spring water in these areas ten to dozens times higher than that in other areas of China, forming a unique natural selenium-enriched biosphere.
Experts found that selenium is one of the most important trace elements in human body, which has been proved to have the effects of preventing cancer and delaying aging. Most of the soil in Changshou area is rich in selenium, and selenium-enriched food is a rare nutritional health care product. Enshi's unique natural selenium-enriched biosphere, biological selenium resources, traditional Chinese medicine library resources, natural oxygen bar and green ecological environment are all ideal places to develop health care (pension) industry, and also a summer resort between Chongqing and Wuhan.
199 1 year, professor Yu Ruomu, a famous nutritionist, attended the seminar on comprehensive development of selenium resources in Enshi prefecture, and proposed that "rehabilitation tourism will be a popular tourism if there is a method of turning to recuperation in medical methods." As long as the traffic conditions are improved, Enshi has unique conditions for using selenium resources to carry out rehabilitation tourism. "
1992 August 18, Professor Yu Ruomu published a signed article "Selenium-an Important Element of Life" in Science and Technology Daily, saying that "Enshi City, Hubei Province is blessed with selenium-rich soil, people live a long and healthy life, many centenarians, smart children, high IQ and good academic performance, and the girls in Enshi are beautiful, watery and beautiful.
According to the survey, the incidence of cancer in Enshi is only 4.68/65438+ 10,000, while the average in low selenium areas in China is 16.64/65438+ 10,000, among which the mortality rate of liver cancer in Enshi is 1.7 1/65438+ 10,000, and that in Enshi is 4.70/. In other parts of Hubei Province, it is 6.2-12.1100000, and the high incidence area of liver cancer in Qidong City, Jiangsu Province is as high as 55/100000. The blood selenium level of Enshi people is 0. 16- 1.50ug/ml, which is the blood selenium level of residents in Qidong City, Jiangsu Province.