Good old fireside chat, page-15

A good summary of the project:

Paradox Brine Project Overview:
The Paradox Brine Project is subterranean pressurized brine (SPB) project targeting brines from Clastic Zone 31, approximately 6,000 to 7,000 feet below the surface, and 20 additional brine zones above and below Clastic Zone 31.
During the 1960’s, numerous oil wells were drilled in the region and encountered over pressurized brines in a unit of the Pennsylvanian Paradox Formation named the Clastic Zone 31.
The Pennsylvanian Paradox Formation has been defined in numerous oil wells drilled throughout the region. See Figure 1. While most wells were not analyzed for lithium, the Clastic Zone 31 horizon of 2 wells within 1km of the south end of the claims (Long Canyon No.1 and Robert’s Well) were assayed and showed lithium values of up to 1,700ppm, and averaged 500ppm Li. The higher lithium values were reported close to the Robert’s Rupture geological formation which runs through the Project claims. In addition, bromine, boron and iodine and Magnesium were found to be in high concentrations.
The pressurized brines from Clastic Zone 31 consist of 30 feet of shale, anhydrite and dolomite, and are not part of any oil reservoir. The brines are under pressure (approximately twice the expected pressure of 4,953 psi) and at a higher temperature than would be expected (60°C compared to 40°C). This resulted in the brines flowing to the surface when intersected by historic drilling.
Phase 1 of a testing program on a synthetically prepared brine with a composition based on the brine composition of samples assayed from Clastic Zone 31 (800m south of the Project area) has found that magnesium could be removed with only a very small loss of 1% Li (less than 3%) occurring during the process (refer to the announcement of 12 April 2017).
The composition of the synthetic brine used in the test work is shown in Table 1.

	Column 1	Column 2
0	Element	Concentration   (ppm)
1	Li	1,700
2	B	20,000
3	Br	2,500
4	I	450
5	Mg	34,000
6	Ca	3,000
7	K	33,000
8	Na	43,000
9	Co3	200
10	SO4	500
11	PO4	1.5

Table 1: Composition of the synthetic lithium brine solution used in the test work
A low Mg:Li ratio is important for the processing of lithium brines where evaporation ponds are used, with acceptable ratios up to 6. The Paradox Brine Project is expected to have a Mg:Li ratio of 20. Voyageur’s joint venture partner Anson Resources has sought to identify a process to enable the extraction of the magnesium. The result of the test work conducted has been that the magnesium has been removed to a battery grade level (<10ppm). The magnesium reduction was achieved with only the lithium loss less than 3%.
In addition, by using a processing plant, thereby avoiding the use of evaporation ponds, processing is reduced to hours compared to multiple months.
Voyageur has engaged two additional processing technology companies and testing is ongoing. Upon conclusion of testing of brine processing technologies Voyageur will select a process which presents the most favorable economics.