Newport daily independent., 1905-11-06
MOLYBDENITE MINE.
smE uGnD IN NAHURAOyURx O1
 eTU1, FOUND IN 1aA1NE+
Aspssits Are ef Rare occnrrsnee and he ValuS of Theee Located IB Partly Con5se-
 tural.

One of the principal deposits c1 MOiybdenum ore in this country is st Cooper. Me. It wns visited in Sep Ae~sber. 1904, by DT. George Ot1s S.atth. of the United States geological suryey who tells In bulletin IsS, the surveys annual publication on Its sx- p,oits in economic geology, how the Aneyicas Molybdenun company pre- vented him from having moro to say about the moly bdenum of tlas locality. YEc vas not permitted to visit the mine, hnt the observations he mace at the surface furnished him sOnic,ent oata for s consideration of the character ahd origin of the deposit
 The town of Cooper IS in washing ion county. in the extreme southeastern mart of Maine, and is the fourth toWn- ship west of Calais The nearest 1a1l- road station is Marion, 1D the secobo township south Prospecting TOT mo- lybdenIle has been carried op nt seV- eraI points jp this locality, but the only important development thus 1a1 's lna' on the property of the American MO lybdenuD company.
 The molybdenite occurs Dotb ID peg matite dykes and jD the granite cut Dy these dykes A number o1 distinct peg matite dykes were seen op this property varying in width from few inches to seyeral feet In these the moly ybden)ts occurs in lead gray hexagona) crystals of short prismatic habit, or as less reg ular fo]iated masses, often with rao1ate structure. The molybdenite is found also in small flakes or largor nests or flakes disseminated throughout the granite mass.
 NOlybdenite occurs at several other localities in Maine, as well as in tho other New England states. It Is usn- ally found in small flakes disseninateo through the granite OI gneisS, 70 that Ahe Cooper occurrence Is of special interest by reason of tho light u throws on tho origin of this mineral. The pegmatite dykes are probably approximately contemporansooe With Aho granite intrusion, representing lhe latest capitalization of tho sran- itio ypsgma. and therefore intrnding the consolidated granite In this pe9matite magma molybdenum disul- phide appears to have been prom1' nsnt oonstitsant and to have crystal sxsa carly in the consolidation cf the dykes. Tho mOlybdenite In the gyan- Ms may be either the result of imprSg- nation at tho time of the pegMatit1c intrusion or it may be an original con- stituent. The former view is support ed by the apparently larger amount in ahe EYnnite near the dykes.
 Tho ores of mely bdenum have been en greater demand since mOlybdenum hos been used in the manufacture of steel to increase its hardness and tOughness The comparative rarity and high cost Of the ores, have, however, limited it's use
 The economic value of such deposit - the Cooper molybdenite is partly con tectural. The conditions for Quarrying and mining both the pegmatite and the wall rock appear favorable, and con- siderable work of this kind has been done. The rock lying on the dump contained varying proportions of mo- 1yDdenite, but 1t seemed that most of the crude ore could be readily distin- auished and separated from the barren rock by hand picking. The crucial test of the successful working of snch de- pOsit is doubtless connected with the milling process, rather than with the mining methods. A compact plant for treating the moly bdenit0 ore has beer erected by this company, but the de tails as to cost of crushing the rock and of concentrating and cleansing the sep aTated mineral could not be asesrtainCd Single Talents and Self-COnfdoDC e.
 A Aln9lA- talNht man AnNNnriNG hw