Lithium Argentina AG

For the period ended Mar 20, 2026. Filed Mar 20, 2026.

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Mar 20, 2026 · Filed Mar 20, 2026

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LAR$4.25+4.4%Stored close · as of Nov 6, 2026

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EX-99.1 · Figure 7.53 Lithium Concentrations in Pump Test Samples – Olaroz

Figure 7.53 Lithium Concentrations in Pump Test Samples – Olaroz

7.16

Drilling

7.16.1

Reverse Circulation (RC) Borehole Program 2009-2010

The objectives of this program were to: 1) develop vertical profiles of brine chemistry at depth in the salars, and 2) provide geological and hydrogeological data. This program was conducted between September 2009 and August 2010 and the drilling is summarized in Table 7.5. Twenty-four RC boreholes (PE-01 through PE-22, plus two twin holes) were completed during this period, for total drilling of 4,176 m. Borehole depths range from 28 m (PE-01) to 371 m (PE-10).

Lithium Argentina AG., 2026 Cauchari-Olaroz S-K 1300 Technical ReportCauchari-Olaroz Salars, Argentina	Page 171 of 418

Table 7.5 Borehole Drilling Summary for the RC Borehole Program Conducted in 2009 and 2010
RC Borehole ID · Drilling Interval · Drilling Length (m) · RC Borehole ID · Drilling Interval · Drilling Length (m)
From (m) · To (m) · From (m) · To (m)
PE-01	-	28	28	PE-13	-	209	209
PE-02	-	40	40	PE-14	-	144	144
PE-03	-	90	90	PE-14A	144	228	84
PE-04	-	187	187	PE-15	-	205	205
PE-05	-	210	210	PE-16	-	64	64
PE-06	-	165	165	PE-17	-	246	246
PE-07	78.9	249	170.1	PE-17A	-	220	220
PE-08	-	194	194	PE-18	-	312	312
PE-09	-	198	198	PE-19	-	267	267
PE-10	-	371	371	PE-20	-	204	204
PE-11	-	80	80	PE-21	-	222	222
PE-12	-	36	36	PE-22	-	230	230
Total Boreholes: 24 / Total drilling: 4,176 m

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