The Froggy Channel., page-8447

The suitability of brine for lithium production is determined by its chemical composition. Numerous research and review papers discuss in detail different groups of compounds present in reservoir waters [39,47,48]. The total dissolved solids (TDS) of oilfield waters vary widely from 5.6 g/L to 313.7 g/L [39] and most of them are of the Na-Cl type. Among the anions, chlorides dominate, with carbonates, bicarbonates, sulfates, sulfides, bromides, and iodides in smaller amounts. Unlike surface water, nitrates and phosphates are rare in reservoir brines.

Apologies for the oxide, no mention of that in this link, looking good for oilfield brines, the above link is a good read