NJDEP - NJGS - First Annual Report of the Geological Survey of the ...

87texposes a, mass'of ore nine feet i a width, associated to a considerableextent with grains of qua/'tz and ;feldsPar;but freefrom iron pyrites: Small specks of carbonate and sulphuretof copper, ire disscmif_ated through some :parts of it, but notin a sufficient qdantity to injure it'as a 'furnace. ore, for whichit will answer an excellent purpose. " • "Following the summit of the Wallkin Mountain towards .the sbuthwest, I observed many indications of large depositsof ol'e. Undoubtedly very extensive beds may be.opened inthis vicinity, which atno distant day-Will prove a source of• great profit to their proprietors.' 'SHERMANTSMINE.This mine is situated on Slack Brook, three quarters of'amile southeast of Sparta. Several deposits of ore are exposedon either side of the brook, varyifig from three to ten feet inwidth. ' They are very irregular, having no well defined walls,and, in many places, it is difficult to ascertain their limits, bec_iusethe ore is disseminated to a considerable extent throughthe adjoining rocks.• " : ' _ ' HEMATITE. :[This ore of iron I when pure, has a,'meiallic appearance ; isof various shades of color, and is'composed of seventy metalliciron and thirty oxygen, in one hundred parts. 'I_ is easilyclistinguished from other ores of iron by its reddish streaJ_ andl_owder. 'In nature it rarely cecum in a pure state, hut gener-_.lly mingled with 'lime, silica, alumina, &c._ when its valuedcper_ds on the nature and proportion of the .foreign materialIt is generally found in beds or irregular deposits associatpdwith igneous and metamorphic rocks, .more frequently in thelatter, or at the junction of the two. A great part of the ironmanufactured in different countries is "from this ore, and al-NEW JERSEY GEOLOGICAL SURVEY