There is no standard lot size. However, some cities have similar lot sizes for houses. In Southern California, it's not uncommon for lots to be about 50' X 100', or about 5,000 square feet, in size. That's less than 1/8 acre, since an acre is something over 42,000 square feet. Some cities require that lots be of a certain size or higher before a second dwelling can be erected there, or restrict the square footage of the house on the lot to some proportion of the lot area.
Gold ores can be categorized under four broad heads: free milling ores, refractory ores, preg-robbing ores and complex ores. According to the different gold ore types, Zenith can design different models of gold ore crusher or gold crusher for different crushing process. Jaw crusher is usually used as primary gold crushing and impact crusher or gyratory crusher is applied widely as secondary crushing process.
Other important metal-bearing minerals can also be found in the quartz reefs with the gold. The presence or absence of these minerals can be used to help classify the type of gold field. The most common and widespread are pyrite and arsenopyrite, two minerals containing iron and sulphur.eins and reefs of gold-bearing quartz can occur in many types of rock, for example around granites, in volcanic rocks or in regions of black slate, but in most cases these host rocks are not the immediate source of the gold. Gold deposits have formed at many different times during Earthâs history.