zone of structurally controlled clay alteration

[Puma]

Полное предложение:
Condemnation holes drilled in the tailings area, 1.5 km southwest of BB zone, have intersected a large of structurally controlled clay alteration similar to the upper part of the North zone.

[10-4]

Зона структурно зависимого преобразования в глинистое вещество (или - преобразования глинистого вещества)