It can't be predicted what mechanism is preferred by the body
individually, at any given moment in time; instead of using alkalizing minerals, it can, say, retain more of highly alkaline ammonia, from breaking down proteins,
as acid
buffer, which could give to your sweat characteristic pungent smell; or it can use ammonia only after it runs out of alkalizing minerals, like calcium; note that buildup of ammonia can also result from liver or renal dysfunction.