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Juntai International Group, as a globally influential multinational enterprise, is committed to resource development and utilization, environmental protection, and sustainable development. As one of the world's largest copper producing countries, Chile has abundant copper resources. Therefore, Juntai International Group has cooperated with Chilean copper mining enterprises to jointly carry out copper mining and smelting projects, aiming to achieve efficient utilization of resources and environmental protection.
Project objective:
Improving copper mining efficiency: Introducing advanced mining technology and management experience, optimizing mine design and mining processes, improving copper mining efficiency, and achieving sustainable resource extraction.
Reduce environmental pollution: jointly invest in the construction of advanced smelting facilities, introduce efficient and energy-saving production processes, reduce environmental pollution emissions, and achieve green production.
Promote technological innovation: Carry out scientific research projects, promote the progress of metallurgical technology, enhance the technical level and management ability of employees, and promote technological exchange and cooperation between the two countries.
Project achievements:
Efficient utilization of resources: By optimizing mining and smelting processes, the utilization rate of copper resources has been improved, and the economic benefits of the project have been enhanced.
Reducing environmental impact: Building advanced environmental protection facilities has reduced environmental pollution emissions, achieved green production, and is in line with the concept of sustainable development.
Enhancing corporate image: The successful implementation of the project has established a good image of Juntai International Group in the mining industry and enhanced the company's competitiveness in the international market.
Looking ahead to the future:
The cooperation between Juntai International Group and Chile's copper mining and smelting project has achieved significant results. The two sides will continue to deepen cooperation, jointly explore the path of sustainable development, and make greater contributions to the prosperity and development of the copper mining industry. At the same time, the project will also build a more solid bridge for technological and cultural exchanges and cooperation between the two countries, promoting cooperation in multiple fields.
Introduction to Mines:
1、 Location and traffic conditions of the mining area
The blonde mining area is located in the central part of the Republic of Chile, at the western foot of the Andes Mountains, facing the Pacific Ocean to the west. The central geographic coordinates are S30 ° 6 ′ 19 ″ and W71 ° 8 ′ 35 ″. The administrative division is the fourth largest region in Chile - the city of Andacollo in the province of ELQUI. It has a total area of 5.27 km2 and consists of five connected mining rights, including LA RUBIA 1-20, CRISTAL 1-20, LAS AMIGAS 1-10, CRISTAL 1-19, and VIRGINIA 1-20. The mining rights consist of multiple metals such as copper, gold, and silver, with a long-term validity period and a mining concession nature. The coordinates of the outermost inflection point in the mining rights area are shown in Table 1-1, and the distribution of each mining right is shown in Figure 1-1.
Figure 1-1 Distribution of Mining Rights
Table 1-1 List of inflection point coordinates in the mining area
| Serial Number |
X |
Y |
Serial Number |
X |
Y |
area |
|
1 |
292500 |
6668907 |
7 |
295000 |
6666907 |
5.27km2 |
|
2 |
293800 |
6668907 |
8 |
294000 |
6666907 |
|
|
3 |
293800 |
6668607 |
9 |
294000 |
6666007 |
|
|
4 |
294400 |
6668607 |
10 |
293500 |
6666007 |
|
|
5 |
294400 |
6668907 |
11 |
293500 |
6666907 |
|
|
6 |
295000 |
6668907 |
12 |
292500 |
6666907 |
The transportation infrastructure in the mining area is relatively complete, and there are two roads from La Serena that can reach this area: one is to head towards the city of Bigunia, 25km east from Highway 41, and 20km south from the rural road; The second option is to travel 25km south from Highway 43 towards the city of Andokoyo, and then 13km east via gravel road to reach it. Multiple mining sites within the mining area can be directly reached by vehicles, making transportation more convenient.
Figure 1-2 Traffic Location Map of Mining Area
2、 Geological characteristics of the mining area
The mining area is located on the porphyry copper deposit belt of the East Andes polymetallic mineralization belt, with the strata mainly composed of Cretaceous (Kqm) terrestrial volcanic rocks interbedded with sandstone, partially covered by the Quaternary system; The structure is basically a monoclinic structure with a tendency towards the northeast, and the dip angle of the strata is mostly greater than 60 °. The mining area has developed a northeast trending translational fault, which extends 2.2km in the area. The northwest plate moves northeast with a displacement of about 330m, cutting through the Kqm strata. The majority of the rock masses in the area are shallow andesite porphyrites (kh (a)) intruded in the early Cretaceous period, with a small amount of biotite hornblende and quartz diorite intruded in the early Cretaceous period in the northeast corner.
3、 Geological characteristics of ore bodies in mining areas
Based on the current work results and analogy with adjacent mining areas, the mining area has preliminarily delineated three mineralization concentration areas, numbered as mineralization bodies I, II, and III (see Figure 3-1 distribution map of mineralization bodies).
3-1 Copper Mine (Chemical) Body Distribution Map
No.1 ore body (chemical): located in the northwest of the mining area, in a shoe shape, running northeast, approximately 1230m long, 350-620m wide, with an area of 0.58km2. The ore body is controlled by 9 outcrop points, with 7 sampled samples (block samples), with a grade of 0.706% to 1.862%, and an average of 1.434%. The ore consists of oxidized minerals such as malachite and azurite, which are disseminated, veined, and thin film like. They are mainly distributed in rock fractures, and the surrounding rock is andesite porphyry intruded in the early Cretaceous period.
II ore body: located in the central eastern part of the mining area, in a reverse S-shape, running north-south, approximately 1280m long and 270-730m wide, with an area of 0.59km2. The ore body is controlled by 13 outcrop points, two exploration grooves, and two drilling holes. There are 8 outcrop point samples (block samples), with a grade of 1.135% to 1.312%. The two exploration grooves are spaced 30m apart, with lengths of 350m and 32m respectively. There are 4 ore veins visible in exploration groove 3, with thicknesses of 8m, 18m, 4m, and 8m respectively. There are 2 ore veins visible in exploration groove 4, with thicknesses of 18m and 4m, and the ore grade is 0.304% to 2.640%. A borehole reveals ore, with a depth of 11.5m and a thickness of 6m, with an average grade of 0.781%. The average grade of the ore body is 1.157%. The ore consists of oxidized minerals such as malachite and azurite, mainly in the form of disseminated, fine vein disseminated, and thin film. It is mainly distributed in rock fractures, and the surrounding rock is andesite porphyry intruded in the early Cretaceous period.
|
Table 3-1 Table of ore occurrences in the exploration trench of ore (chemical) body II |
|||||||
| Sample number |
self(m) |
to(m) |
Sampling length(m) |
Sample name |
Cu(%) |
Ag(ppm) |
Au(ppm) |
|
JTC3-1 |
0.00 |
2.00 |
2.00 |
Decorated andesite porphyrite |
0.15 |
|
|
|
JTC3-2 |
2.00 |
4.00 |
2.00 |
Copper ore |
0.85 |
2.9 |
0.63 |
|
JTC3-3 |
4.00 |
6.00 |
2.00 |
Copper ore |
0.535 |
|
|
|
JTC3-4 |
6.00 |
8.00 |
2.00 |
Copper ore |
0.240 |
0.5 |
0 |
|
JTC3-5 |
14.00 |
16.00 |
2.00 |
Copper ore |
0.058 |
|
|
|
JTC3-6 |
50.00 |
52.00 |
2.00 |
Copper ore |
0.472 |
2.7 |
0.20 |
|
JTC3-7 |
52.00 |
54.00 |
2.00 |
Copper ore |
1.761 |
|
|
|
JTC3-8 |
54.00 |
56.00 |
2.00 |
Copper ore |
1.673 |
15.1 |
0.41 |
|
JTC3-9 |
56.00 |
58.00 |
2.00 |
Copper ore |
1.653 |
|
|
|
JTC3-10 |
58.00 |
60.00 |
2.00 |
Copper ore |
1.022 |
4.7 |
0.20 |
|
JTC3-11 |
60.00 |
62.00 |
2.00 |
Copper ore |
1.283 |
|
|
|
JTC3-12 |
62.00 |
64.00 |
2.00 |
Copper ore |
0.304 |
1.3 |
0.05 |
|
JTC3-13 |
64.00 |
66.00 |
2.00 |
Copper ore |
0.792 |
|
|
|
JTC3-14 |
66.00 |
68.00 |
2.00 |
Decorated andesite porphyrite |
0.675 |
7.4 |
0.24 |
|
JTC3-15 |
172.00 |
174.00 |
2.00 |
Copper ore |
0.447 |
3.4 |
0.04 |
|
JTC3-16 |
174.00 |
176.00 |
2.00 |
Copper ore |
0.751 |
5.9 |
0.20 |
|
JTC3-17 |
342.00 |
344.00 |
2.00 |
Copper ore |
1.191 |
|
|
|
JTC3-18 |
344.00 |
346.00 |
2.00 |
Copper ore |
1.058 |
7.4 |
0.13 |
|
JTC3-19 |
346.00 |
348.00 |
2.00 |
Copper ore |
1.002 |
|
|
|
JTC3-20 |
348.00 |
350.00 |
2.00 |
Copper ore |
0.751 |
8.7 |
0.11 |
|
JTC4-1 |
0.00 |
2.00 |
2.00 |
Copper ore |
1.427 |
2.6 |
0.35 |
|
JTC4-2 |
2.00 |
4.00 |
2.00 |
Copper ore |
1.863 |
|
|
|
JTC4-3 |
4.00 |
6.00 |
2.00 |
Copper ore |
1.855 |
4.6 |
0.45 |
|
JTC4-4 |
6.00 |
8.00 |
2.00 |
Copper ore |
2.640 |
|
|
|
JTC4-5 |
8.00 |
10.00 |
2.00 |
Copper ore |
0.926 |
10.1 |
0.11 |
|
JTC4-6 |
10.00 |
12.00 |
2.00 |
Copper ore |
1.139 |
|
|
|
JTC4-7 |
12.00 |
14.00 |
2.00 |
Copper ore |
1.383 |
18.5 |
0.07 |
|
JTC4-8 |
14.00 |
16.00 |
2.00 |
Copper ore |
0.747 |
|
|
|
JTC4-9 |
16.00 |
18.00 |
2.00 |
Copper ore |
1.197 |
20.4 |
0.10 |
|
JTC4-10 |
28.00 |
30.00 |
2.00 |
Copper ore |
0.837 |
|
|
|
JTC4-11 |
30.00 |
32.00 |
2.00 |
Copper ore |
0.853 |
15.5 |
0.03 |
III ore body: located in the northeast corner of the mining area, elliptical in shape, running northeast, approximately 520m long, 300-400m wide, with an area of 0.16km2. The ore body is controlled by four outcrop points and one exploration groove, with a grade of 0.377% to 3.564% and an average of 1.411%. The ore is oxidized minerals such as malachite and azurite, mainly in the form of disseminated, fine vein disseminated, and thin film, mainly distributed in rock fractures. The surrounding rock is quartz diorite porphyrite intruded in the early Cretaceous period.
| Table 3-2 Table of Ore (Chemical) Exploration Trench Findings in No.3 Mine (Chemical) Body | |||||||
| Sample number |
self(m) |
to(m) |
Sampling length(m) |
Sample name |
Cu(%) |
Ag(ppm) |
Au(ppm) |
|
JTC1-1 |
62.00 |
64.00 |
2.00 |
Decorated quartz diorite porphyrite |
0.377 |
|
|
|
JTC1-2 |
64.00 |
65.50 |
1.50 |
Copper ore |
3.564 |
2.1 |
0.51 |
|
JTC1-3 |
65.50 |
67.50 |
2.00 |
Decorated quartz diorite porphyrite |
0.583 |
|
|
|
JTC1-4 |
170.50 |
172.50 |
2.00 |
Decorated quartz diorite porphyrite |
0.220 |
|
|
|
JTC1-5 |
172.50 |
174.50 |
2.00 |
Copper ore |
1.490 |
12.1 |
1.67 |
|
JTC1-6 |
174.50 |
176.50 |
2.00 |
Decorated quartz diorite porphyrite |
0.049 |
|
|
Most of the ore in the copper ore mining area is produced in the andesite porphyry rock mass, and there are also mineral occurrences distributed in the diorite porphyry rock mass. The ore minerals are malachite, azurite, etc., distributed in the andesite in the form of disseminated, fine vein, and network vein. Some ore points contain primary sulfide minerals such as chalcopyrite. As shown in the following figure:
One of the copper mineralization sites, with an ore body thickness of 2.2-3.8 meters and an average grade of 0.6-1.7%
Mining accumulated oxidized ore
One of the copper mining faces, with an ore body width of about 25 meters and an exposed thickness of 7-8 meters,
The average grade is 0.5-3.2%
Copper mineralization point 4, with a copper ore body width exceeding 10 meters
Copper mineralization point 5, where primary sulfide minerals such as chalcopyrite and pyrite can be seen with the naked eye.
Copper mineralization point 6, where primary sulfide minerals such as chalcopyrite and pyrite can be seen with the naked eye.
A typical ore in a mining area that contains both oxidized ore and primary sulfide ore
4、 Completed exploration work and achievements
From 2014 to 2015, the blonde girl mining area conducted field geological exploration work, mainly completing the physical workload as shown in the table below:
Table 4-1 Workload completed in the mining area
|
working item |
unit of measurement | Current completed workload | |
|
geological profile survey（1∶1000） |
km |
3.403 |
|
|
geological survey（1∶10000） |
km2 |
5.27 |
|
| geophysical prospecting |
|
Two test lines | |
|
Trench exploration（0-3m） |
m3 |
2023m3/4strip |
|
| Mechanical rock core drilling |
m |
856.56m/2hole |
|
| bulk chemical analysis | rock | piece |
2 |
| ore | piece |
2 |
|
|
Chemical analysis sample（Cu、Au） |
piece |
70 |
|
| rock-mineral determination | Thin slice | a flat |
20 |
| Optical film | a flat |
5 |
|
Through geological exploration work, the lithology and structural changes in the mining area were analyzed and studied, and the distribution of strata, structures, rock masses, and mineralization points in the mining area were understood. Some hidden mineralization points were exposed and controlled, and the mineralization range and ore types were roughly understood. Three copper ore bodies were delineated, as shown in Figure 4-1 ore body estimation diagram. The estimated copper metal content (334?) was 245000 tons, as shown in Table 4-2 ore body estimation table.
4-2 Estimation table of ore body in mining area
| Ore body number | Resource level |
Horizontal area (thousand m2) |
Average thickness (m) |
average grade (%) |
weight(t/m3) |
Ore quantity(thousand t) |
metallicity(thousand t) |
|
Ⅰ |
334? |
582.72 |
6.0 |
0.734 |
3.0 |
10488.96 |
76.99 |
|
Ⅱ |
334? |
585.04 |
6.0 |
1.312 |
3.0 |
10530.72 |
138.16 |
|
Ⅲ |
334? |
160.51 |
6.0 |
1.043 |
3.0 |
2889.18 |
30.13 |
| total |
|
|
|
|
|
23908.86 |
245.28 |
5、 Prospects and advantages of mining areas
1. Chile and the Cordillera Mountains on the west coast of the Americas are the world's most famous porphyry copper deposits, with favorable tectonic and ore-forming backgrounds that have led to the formation and clustering of various mineral resources, especially the enrichment of copper deposits. Multiple periods of magma intrusion have led to multiple mineralization, resulting in the formation of deposits with different characteristics.
This mining area is located in the eastern Andes polymetallic mineralization belt, where strong tectonic and magmatic activities have created favorable geological conditions for mineralization. There are many distribution points and a huge distribution area of copper mineralization in the area. Through preliminary geological work such as trench exploration and drilling, high-grade and thick copper (gold and silver) deposits have been discovered, which are similar to large open-pit copper mines in the surrounding area. At present, through preliminary exploration work, the mining area only has a prospective ore volume of 23.9 million tons of copper oxide and a copper metal reserve of 245000 tons, which has reached the scale of large and medium-sized mines, and the primary sulfide copper mine has not been included. With the improvement of exploration level, the potential for discovered resources will further increase, especially the further discovery of primary copper deposits.
2. The transportation in the mining area is relatively convenient, with simple hydrogeology, engineering geology, and environmental geology. The area is sparsely populated, and there is no farmland or economic forest land. The economy is still in the undeveloped stage. At present, no valuable cultural relics or historical sites have been found in the area, nor are there scenic spots or water source protection areas. Therefore, the exploration and construction will not constitute damage to cultural relics, scenic spots, or water source protection areas, and the environmental risk is relatively small. This mining right belongs to the mining right, and the procedures are legal and valid. It can be directly invested in mining.
3. Chile has abundant mineral resources, superior natural conditions, stable politics, sound laws, good social security, stable mining investment policies, relatively low mining investment costs, and low risks, making it one of the best mining investment destination countries in the world. Chile has good relations with China, and both sides have signed a free trade agreement, making it convenient for people, capital, and goods to enter and exit. Project investment, exploration, and development work are easy to operate.
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