It occurs in amphibole and spilite in Shi Ying in Lower Paleozoic. It is lenticular and layered. The ore minerals are mainly chalcopyrite and pyrite. Copper grade is generally greater than 1%. Such as Baiyin Factory in Gansu, China and Honggou in Qinghai.
Baiyinchang copper mine is located in the northeast of Lanzhou City, Gansu Province. Including Zheyaoshan, Huoyanshan, Tongchanggou copper mine, Xiaotieshan and Sihuan polymetallic mine, covering an area of 28 square kilometers. The wall rock alteration of the deposit includes albitization, chloritization, sericitization, silicification, dolomitization, secondary alum fossilization, jarosite and kaolin.
2. Molten Cu-Ni sulfide ore in ultrabasic rocks.
It occurs in the middle and lower parts of pure olivine, pyroxene and olivine pyroxene in Lower Paleozoic. It is layered and lenticular. The ore minerals are mainly chalcopyrite and nickel pyrite. Copper grade is generally less than 1%. Such as Jinchuan, Gansu, China and Kalatongke, Xinjiang.
3. Metamorphic layered copper deposits
It occurs in Mesoproterozoic dolomite, marble and gneiss, and occurs along the rock stratum. The ore body is layered, quasi-layered and lenticular. The ore minerals are mainly chalcopyrite and bornite. Copper grade is generally greater than 1%. Such as Tang Dan in Dongchuan, Yunnan, and Hujiayu in Zhongtiaoshan, Shanxi.
Since 1950s, large and medium-sized copper mines such as Tongkuangyu, Xiaoxigou, Hujiayu, Bizigou and Luojiahe have been mined in Zhongtiaoshan area, Shanxi Province, with a total proven copper reserve of more than 3.3 million tons ... 25438-0956 Zhongtiaoshan Nonferrous Metals Company was established to develop copper resources in this area.
4. Sika copper deposit
It occurs inside and outside the contact zone between intermediate-acid intrusive rocks and carbonate rocks. The ore bodies are mainly layered, lenticular and lentiform. The ore minerals are mainly chalcopyrite and pyrite. Copper grade is generally greater than 1%. Such as Tongguan Mountain in Anhui and Chengmen Mountain in Jiangxi.
5. Porphyry copper deposit
It occurs in Mesozoic and Cenozoic granodiorite porphyry, adamellite porphyry, diorite porphyry and its surrounding rocks. The ore body is layered and lenticular. The ore mineral is mainly chalcopyrite. Copper grade is generally less than 1%. Deposits are often large and medium-sized Such as Jiangxi Copper Factory, Heilongjiang Duobaoshan, Tibet Yulong, Qulong and other mines.
6. Sandstone copper mine
It occurs in Mesozoic continental sandstone and sand shale. The ore body is layered and lenticular. The main ore mineral is chalcocite, followed by bornite and chalcopyrite. The grade of copper is greater than 1%. For example, Haojiahe in Yunnan and Datong Copper Factory in Sichuan.
Extended data
China large copper mine area
1, Honggou copper mine
The main ore body is 80 ~ 300m long, 65438 0.5 ~ 7.0m thick and 60 ~ 65438 0.50m vertical. It is lenticular or complex vein, and its occurrence is consistent with surrounding rock. The oxidation zone is undeveloped. The ores are mainly massive copper-bearing pyrite, copper-bearing magnetite and chalcopyrite, followed by disseminated ores. The hydrogeological conditions are simple, the surrounding rock is stable, and the metallurgical capacity is good.
1957 according to the masses. 1958 ~ 1959 Qilian Mountain Geological Team conducted preliminary survey, 1962 ~ 1984 No.8 Nonferrous Geological Team and team 7 intermittently conducted detailed survey, preliminary survey and supplementary survey. Starting from 1958, indigenous mining started. Qilian Mountain Nonferrous Metals Company was established in 1963. 197 1 year, a concentrator with a daily processing capacity of 750 tons of ore will be built.
2. Dongchuan Copper Mine
The large-scale state-owned copper mining area is also the key construction project of the first five-year plan. It has a long history. The mining and smelting of copper ore began in the Western Han Dynasty and reached its peak in Guangxu period of Qing Dynasty, with an annual output of 8,000 tons of crude copper. At that time, 80% of the money made in Yunnan Province was Dongchuan Copper and Gejiu Tin.
3. Duobaoshan Copper Mine
Three ore belts, Duobaoshan Copper Mine, Tongshan Copper Mine and Sankuanggou Copper Mine, have been proved in China, with an average copper grade of 0.47% and a resource reserve of 3.626 million tons. It accounts for 95% of the province's resource reserves and ranks third in the country. The current price is estimated at 2 172 billion yuan.
Baidu encyclopedia-copper mine
Baidu encyclopedia-Baiyinchang copper mine
Baidu Baike-Zhongtiaoshan Copper Mine Base