Transactions . kansas were mines of smithsonite,and the ore was found in the surface-clays and soils, along andnear the outcrops of deposits of zinc-blende. Although there THE ZIN( wi» : \l» -M P0S1 I - 0] NOR in \i; k w <;oi is hardly a zinc-prospect In North Arkansas which has notyielded Bome smithsonite, there is but little search nowadifor smithsonite alone. I feel reasonably confident, howe^thai when the search for the zinc-ores of North Arkansas hasbeen properly systematized, large bodies of zinc carbonate willbe discovered. These are most likely to be in regions of deeprock-decaj.
Transactions . kansas were mines of smithsonite,and the ore was found in the surface-clays and soils, along andnear the outcrops of deposits of zinc-blende. Although there THE ZIN( wi» : \l» -M P0S1 I - 0] NOR in \i; k w <;oi is hardly a zinc-prospect In North Arkansas which has notyielded Bome smithsonite, there is but little search nowadifor smithsonite alone. I feel reasonably confident, howe^thai when the search for the zinc-ores of North Arkansas hasbeen properly systematized, large bodies of zinc carbonate willbe discovered. These are most likely to be in regions of deeprock-decaj. ? /mine.—Calamine is much less abundant in Arkansasthan either sphalerite or Bmithsonite. The most abundant de-posits now known are in the Sugar Orchard district. TheAlmv mine is at present the most remarkable producer of cala-mine in the State. There arc other prospects in the vicinity f Sugar Orchardcreek which, upon further development, will likewise yieldlarge quantities of calamine. Fig. Yellow Smithsonite Deposited in Crevices in Chert. Morning Star Mine. (Nat-ural size.) On account of lack of time and funds, no quantitative analy-have been made of the Arkansas calamine. Tallow-Clay.—What is commonly known in the zinc-minesas tallow-clay or buck-fat is not a definite mineral, buta mixture, probably of common clay and the mineral present this material is not looked upon as an ore of zinc,simply because no satisfactory process of smelting it has beendevised. Tallow-clay has a peculiar feel, by which it is commonlyrecognized. It may be either red, yellow or brown in occurs, in pockets and seams in the rocks, in nearly all ofthe zinc-mines of North Arkansas. In some of the mines it isfound in great abundance. The following analyses show thecomposition of typical Arkansas tallow-clays: G02 THE ZINC- AND LEAD-DEPOSITS OF NORTH ARKANSAS. Analyses of Arkansas Tallow-Clays, BuffaloMine. Per cent. Silica. SiOa Alumina, Al,():; Zinc oxide
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
