File:Transactions (1871) (14787872643).jpg

Identifier: transactionsmining35amer (find matches)
Title: Transactions
Year: 1871 (1870s)
Authors: American Institute of Mining, Metallurgical, and Petroleum Engineers
Subjects: Mineral industries
Publisher: New York (etc.)
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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ity. The mining-operations in this district are quite extensive,and various deposits of iron-, manganese- and copper-ores are exploited. Fig. 2 indicates the location of all the principal ore-depositsin the district. M anganese-Ores. All of the deposits of manganese-ores now being operatedare in the San Luis District, and comprise the Ponupo group,the Boston mines, and the Ysabelita group. The last twogrups of mines were not being operated at the time of my visit,hut it is reported that they have been installed with a fairlycomplete equipment of railways, washers and concentrators. The Santiago manganese-deposits are among the most exten-sive in the Western Hemisphere, ranking about third in thevalue of output, of which the Ponupo mines furnish by far theater part The Ponupo group is comprised of seven mines, the mostimportant being the Vencedora and Sultana, The first shipment of manganese-ore was made in 1895, andthe quantity has increased gradually, until in 1903 the ship-
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ftflNBH H DIP081 n i B LNT1 ,00, 01 B i. 1 I ments amounted to 2,000 tow per month. The ore-bodi< ;it the Burface, requiring but Little or qo stripping; and whilethey are of irregular Bhape, the pockets are large. ( me cut Inthe Vencedora mine, :»(; ft. wide, with a depth in ore of 80 ft.,is Bhown in Fig. 8. The ore ia imbedded id day ami asso-ciated with jasper and porphyry. The ore is chiefly pyrolusite, of which Borne beautiful crystalsare found. Portions of the pockets contain a high percentage ofphosphorus, but ore of this quality, however, La easily detectedand separated as it is mined. The Sultana workings Bhown in Pig. 4, which were beingned up in February, 1903, were most promising. Thedeposit appears to be a continuous bed of ore extending o-era! acres, and outcrops may be seen in the strep hlutt of .. ± Uceod ORE DEPOSITS NKVK . yirLW KTC^V svMIU.O l.K CUBA. Maj.umu s??TT 1*«0*» ° tc KM1 M KILLS «.♦»«. UklOn O PI _L

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