Mining and Engineering World . 01,and is described in folios issued by theU. S. Geological Survey at that maps show the district to consist ofthree nearly parallel zinc belts, 40 to 50miles long, and about 20 miles belts are each only a few hundredfeet wide, and extend in a northeast-southwest direction, following the general By SAMUEL W. OSGOOD.* erly belt, near the I .. ch Broad river,carry both iron and The ore bodies along the northerly belt,which include the district in tlof the Powell river, the Clinch river, andbetween these two rivers, near the cityof New Tazewell,
Mining and Engineering World . 01,and is described in folios issued by theU. S. Geological Survey at that maps show the district to consist ofthree nearly parallel zinc belts, 40 to 50miles long, and about 20 miles belts are each only a few hundredfeet wide, and extend in a northeast-southwest direction, following the general By SAMUEL W. OSGOOD.* erly belt, near the I .. ch Broad river,carry both iron and The ore bodies along the northerly belt,which include the district in tlof the Powell river, the Clinch river, andbetween these two rivers, near the cityof New Tazewell, in Claiborne county,and in Union countj. are extrem make excellent ore for smelting in a zincwhite paint furnace. Both the northerly ami the southerlybelts have lead, and some iron with thezinc in the ore. It is with the central beltthat this article is princip; ? rned, for here are the most extensive operalions, owing to accessibility to the rail-way, and to the simple nature of theore>, which are more easily mated. The. Mossy Creek Zinc Quarry. Jefferson City. strike of the Appalachian system of foldsand faults. The ores are contained in the Knoxdolomite, a formation belonging, in part,to the Silurian and in part to the Cam-brian series. In places local disturbanceshave given rise to cross-fissure zones offracture, in these zones are the richestore bodies. The ores are sulphides and*they occur in the filling of the fracture/Miu- ir breccia, combined with calcite anddolomite and not in the rock. No barytes The ores are a compact blende. i whatis called zinc sulphide, being mined fre-quently in huge blocks several feet Creek mine, near other mines along this same belt allhave bodies of high-grade zinc blende,which is of the same nature as the aboveores, carrying a little iron in the formof pyrite. which, added to its complexmilling, also makes it difficult for smelt-ing, for the purpose of making spelter ormerchant zinc. However, this ot : could
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