The altitude effect
The home of Argentine Sauvignon Blanc is the Uco Valley in Mendoza, especially the high Tupungato district, with vineyards between roughly 900 and 1,500 meters. Here the logic is simple and powerful: the higher you climb, the colder the nights, and cold nights are exactly what an aromatic white needs to hold onto its acidity and perfume.
There is a bonus ingredient in the best sites. Tupungato's clay-limestone, mineral-rich, free-draining soils — the same ground that gives the region's Chardonnay its acclaim — lend the wines a flinty, mineral edge. Critics have noted that the high-altitude whites here carry a distinct minerality, an old-world flinty character wrapped in new-world vibrancy. The result is a Sauvignon Blanc that tends to sit between the grassy restraint of the Loire and the tropical exuberance of New Zealand — fresh and herbal, but with ripe fruit and a stony backbone.
