quartzing

Noun

1. The extraction of quartz from the earth, and moreover the subsequent extraction of gold from quartz.
   • The operations of quartzing, charging, skimming, matte handling, firing and grating are carried out at Garfield about the same as at Anaconda and Cananea. - 1910, R. R. Moore, Recent Reverberatory Smelting Practice, in...
   • […] 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...
   • 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...
2. The penetration of another rock or of earth by quartz.
   • 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. - 1956, Geologisches Jahrbuch: allgemeine und regionale...
   • 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. - 1968, Tsvetnye Metally, the...
   • 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"); - 1999, Russian Geology and Geophysics, volume...