Is that 92 troy tons
The article does not say but I suspect that the answer is yes. Precious metals typically are weighed using the troy system.
one “troy” ounce is 31.1 grams. verses an “avoir” ounce which is 28.35 grams. there for there are 14.4 “troy” ounces in an pound(avoir). verses 16 “avoir”ounces is an imperial(avoirdupois) or international pound. a “troy” pound is 12 “troy” ounces and was abolished by Britain as an official weight measure in the 1800s and was rarely if ever used in the US.
the article says metric tons