Identifier: geologicalreconn00vaug (find matches)
Title: A geological reconnaissance of the Dominican republic
Year: 1921 (1920s)
Authors: Vaughan, Thomas Wayland, 1870-1952 Cooke, Charles Wythe, 1887- Condit, Daniel Dale, 1886- Ross, Clyde Polhemus, 1891- Woodring, W. P. (Wendell Phillips), 1891-1983 Calkins, Frank Cathcart, 1878- Geological Survey (U.S.)
Subjects: Geology
Publisher: Washington (Press of Gibson brothers, inc.)
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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hickens and becomes increasingly ferruginous andmight be of possible value as iron ore. The mountains in this vicinity con-sist of serpentine, which forms part of a large belt that extends northwest-ward across to the vicinity of La Vega. The stream pebbles are of slateand limestone and of many varieties of intrusive rock. The hill containingthe nickel deposit is entirely serpentine, as is also the neighboring hill to thenorth, and no other rocks were found in place except a small basic dikethat cuts the serpentine. Gold has been washed by the natives from the stream gravels of theregion and it is said that small quantities of platinum have been found inthe placers, but probably not in quantities sufficient to encourage hopes ofprofitable working. A sample of black sand washed from a small brooknear the camp at the east base of the hill was found on examination to con-tain chromite in addition to considerable magnetite. DOMINICAN REPUBLICGeological Survey Memoirs, Vol. I, Pl. XXII 100
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SOO METERS CONTOUR INTERVAL ZO METERSxxx PROSPECT PITS MAP OF SIERRA PRIETA AT PERSEVERANCIA MINE. ECONOMIC GEOLOGY. 233 MINING OPERATIONS. Nickel ore is said to have been discovered at Sierra Prieta by SenorManuel Delmonte, who obtained a concession and held it through severalrevolutions. The disturbed state of the country prior to American occupa-tion prevented development. Senor Delmonte sold the concession to thesyndicate of which Dr. Rogelio Diaz Pardo of Havana is the principalowner, and a small amount of shafting and trenching has been done for thesyndicate under the supervision of a mining engineer named Pagliuchi.The work done includes a shelf excavation wide enough for a cart road ex-tending around the east and north sides of the hill at about the 195 metercontour. A shaft having a depth of about 25 meters and about 15 metersof cross cuts have been dug near the highest part of the hill. The under-ground work has been discontinued and a tunnel is being started on thesoutheast

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