Company: SQM
Filing Date: 2025-04-24
Form Type: 20-F
Source: 0000909037-25-000020
Chunk: 92

Company: CHEMICAL & MINING CO OF CHILE INC
Filing Date: 2025-04-24
Form: 20-F
Item: Item 4A
Chunk 92
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 reconnaissance and analysis of samples and trenches.
Salar de Atacama
Hydrogeologists and geologists who are QPs prepare the resource and reserve estimates of potassium, sulfate, lithium and boron dissolved in brines at the Salar de Atacama. SQM holds exploitation concessions through Corfo covering an area of 81,920 hectares, over which SQM staff have carried out geological exploitation, brine sampling and geostatistical analysis.
Mount Holland
Geologists and mining engineers who are QPs prepared the mineral resource and reserve estimation for lithium contained in pegmatites at Mount Holland. The mineral reserve has been calculated from the mine plan created from the mineral resource estimation. Wireframes for the geological domains are defined by geochemical criteria of SiO2 > 70% and FeO < 3%, which is representative of pegmatite with minimal host rock dilution as verified against geological logging.
Mining Rights
The discussion of SQM's mining rights is organized below according to the geographic location of its mining operations. SQM's caliche ore mining interests are located throughout the valley of the Tarapacá and Antofagasta regions of northern Chile (in a part of the country known as “El Norte Grande”). From caliche ore, SQM produces products based on nitrates and iodine, and caliche also contains concentrations of potassium. SQM's mining interests in the brine deposits of the Salar de Atacama are found within the Atacama Desert, in the eastern region of El Norte Grande. From these brines SQM primarily produces products based on potassium, sulfate, and lithium. SQM's lithium mining interests are located in Mount 
Holland in Western Australia. SQM produces spodumene concentrate from the Mount Holland deposit and plans to produce lithium hydroxide following the commissioning of a refinery facility in Kwinana, Western Australia.
The map below shows the location of SQM's principal mining operations in Chile and the exploitation and exploration mining concessions that have been granted to us, as well as the mining properties that we lease from Corfo:
Figure 1. Location of SQM mining operations in Chile and the exploitation and exploration mining concessions. Location coordinates longitude and latitude, respectively: of (i) Salar de Atacama (68°24’36.00"W), (23°33’3.60"S); (ii) Nueva Victoria: (69°39’48"W), (20°57’37"S); (iii