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

45b'_affords an excellent quality of ore. The franklinite portion ofthe vein is very ,i_'regular. In one, place,it is from fifteen totwenty.feet in width, and of a remarkably pure quality ; but,in either direction from this spot, i_tbecomes thinner, and, inmany places consists of a few crystals of franklinite very sparinglydisseminated through the limestone_ The secpnd, ornorthwesterly deposit, has been recently opened on the property'ofthe Passa'm"Company. It has been worked to'thpdepth of about forty feet, and 'as yet does not exhibit the _'egularityfound in the former. A tunnel is now being driven_nto the base of the hill, which wi]l strike the deposit aboutninety feet from its outcrop.At the present time, two companies are engaged in mining.the zinc ores of this locality, and in manufacturing directlytherefrom the white oxide of zinc. The one is called theNe W Jersey Zinc Company, and" the other the Passaic ZincCompany. The' former was organized in 1848; and theirworks, situated in Newark, are in successful operation, produclngannually between three and four thousand tons of thewhite oxide of zinc, which is sold as a paint, and is pretbrredfor many purposes to white lead. A small fur*aacc has beenrecently erected at their works, in which the refuse matter,chiefly franklinite, is.smelted for iron. . ,The works of the Passaic Company have been recentlyestablished at Jersey City, where preparations have been madefor manufacturingthe white oxide on an extensive scale.• The only remaining locality at which these ores have beeni'ouud,is at Mine Hill, in Franklin, where the frauklinite greatlyl_redqminates over the other mineral. Two extensive _]epositshave been exposed, and workedto a considerable exten%cro_ing Mine Hill for a distance of three quarters of a mile ina northeasterly and southwesterly direction. They occupy thesummit of the hill, .which rises :one hundred and fifty feetabove water level ; and to this depth the.ore may be removedat a trifling expense." The following section on the southwesternslope of the hill,, e0m_nencing at the northwast_ andcrossing the formations tOwards the southeast, represents ther_lati.veposition of the two.deposits of ore.NEW JERSEY GEOLOGICAL SURVEY