Quartzing

The operations of quartzing, charging, skimming, matte handling, firing and grating are carried out at Garfield about the same as at Anaconda and Cananea.

In 1857, Hutchings’ California magazine bragged that the Suite / Creek Foundry and another at Grass Valley, fifty miles north, were "the only works in the mining district where all kinds of machinery in brass and iron are cast for quartzing, and without the […] "

[…] the loss of gold was still as high as 25 percent. This is one of the reasons why most early quartzing operations soon failed. There were thirty-nine mills in 1854 […]. By 1858, there were 279 quartzing mills operating. Although quartzing was practiced in each of the Mother Lode counties, […]

Fig. 2. A schematic geological map (a) and section of ore zone (b) of the Sukhol Log deposit. […] 5 — zone of intense veinlet quartzing and mylonitization ("Radostnaya");

The wedging away (thinning out), breaking and quartzing of the vein matter in tectonically critical zones does by no means indicate the end of the workability.

The mercury deposit studied is located among sedimentary rocks (limestones, jasperoids, and slates) which have been subjected to extensive quartzing and to other hydro thermal changes.