 | | Report (issue) | | nomenclature. ABSTRACT The Castrovirroyna mining district lies in the Andean Cordillera of South Central...Supervene silver ores vere first mined. Currently the district produces about 20,000 tons of laad*sinc ore and...and 50OO tons of silver ore annually* The district: Is underlain by Tertiary andesitlc rocks interbedded...vestermaost veins at la Virreyna* In tha center of the district, around Caudalosa, lead sulfantiiaonldas are the...pattern of vallrock alteration throughout the district grades from silicification and scricitization |  | | Report (issue) | | PROSPECTS OF THE I, H, IE, IV, AND V REGIONS, NORTHERN CHILE compiled by William C. Williams Open-File Report...complement to my dissertation work in northern Chile under the auspices of Dr. John Guilbert at the University...prospects in the I, n, IE, IV, and V Regions of Chile (Figure 1). Over 3000 sites were compiled from published...well as descriptions of the major mines throughout Chile with insights as to their genesis. Finally, Frutos...accessed through MRDS computer database). District Name District to which site belongs. Lati tude / Long |  | | Journal (issue) | | crystal group, 7 cm, from the Huanzala mine, Dos de Mayo Province, Peru. Marty Zinn collection; Jeff Scovil...Gustavo Adolfo 250-J Estacion Central Santiago, Chile jZonfenls * * . I n t r o d u c t i o n ..................................... History of Peru Mining in Peru The Mineral Specimen Business C o l l e....................... Quiruvilca district, Santiago de Chuco province, department of La Libertad PASTO.......................... Pasto Bueno district, Pallasca province, department of Ancash R a u r a -H u |  | | Journal (issue) | | except the Dale Beck Valley, Dry Gill and Carrock End Mine. Grahamis hoping to get the permit system properly...still very much a 'frontier place'. One supposed mine was started by a character called Otto van Stryk...Stryk who thought he had found a huge iron mine. Alas, he never got any useable ore out of it. Rick went... So now it is recognised as a potential uranium mine! Another anecdote involved a light plane brought...amethyst, fluorapatite and tourmalines. Rossinguranium mine, a uraniferous granite, was also mentioned. Rick |  | | Report (issue) | | Isla Mona in the first part of the 19th century. Mining of the guano deposits in the island's many caves...lasted until about 1922, although the greatest mining activity antedated the present century. In the...dripstone, thin crusts and efflorescences of colorless gypsum are found on the roofs of many cr-verns. Except...constructional. PHOSPHORITE: DEPOSITS HISTORY OP MINING According to F. H. Wadsworth (written communication)...franchise to extract guano from Isla Mona. In 1890 the mining concession was subleased to a German national; |  | | Report (issue) | | Hu1nan aspect 3 Access 3 Previous geological work 3 Mining history 4 Project operations 5 Reports and maps...Gemstones and mineral curiosities 102 Graphite 103 Gypsum 103 Hot springs 103 Kaolin and other clay minerals...data base to support and promote a viable national mining industry. The work was carried out under the Cordillera...the Ecuadorian Mining Institute (INEMIN), replaced in 1991 by the Geological and Mining Corpora tion...1993 Dr Aspden covered the El Oro metamorphic district whilst Dr R A Je1nielita (Economic Geologist) |
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