 | | Book |
| material, together with brittle white precipitates of baryte and amorphous silica coating tube walls of honeycomb...Carbonate-hosted lead-zinc deposits Carbonate-hosted baryte and fluorite deposits Preservation potential HE...Tectonic Setting BMineral Deposits 1 Hydrothermal baryte on the San Clemente Fault Zone 2 Preservation potential...gold-silver of the Basin and Range Province, western USA 2 Porphyry molybdenum deposits of the western cordillera...Ni, Pt, Au, Ti Base metal deposits in the Red Sea area Hydrothermal ore deposits landward of the Mendocino |
 | | Journal (volume) |
| over a wide range. The length of the mineralised area totals about 1. 5 km. Zinc ores occur as re placement...have been comparatively few publications on this area and its ores. The intention of this investigation... prospects and chief geological features of the area are presented in Fig. 1. The Vihanti ore deposit...and longitude 25°08'E. The terrain in the Vihanti area is old peneplane covered with extensive swamps and...solution with regards to different metals in the ore area. Geochemical trace element studies, as weH as lead |
 | | Report (volume) |
| Geology California Div. Mines and Geology County Rept. Geology County Report. San Francisco, Calif. California...Ky. Kentucky .Geol. Survey County Rept. - Kentucky Geological Survey County Report. University of Kentucky...Los Angeles County Mus. Contr. Sci. in Science. Los Angeles, Calif. Los Angeles County Museum Contributions...Contributions Los Angeles County Mus. Nat. History Quart.- Los Angeles County Museum of Natural History Quarterly...Dakota Water Comm. County Ground Water Study- North Dakota State Water Commission County Ground Water Studies |
 | | Report (issue) |
| involved an ensialic evolution cycle of the whole area. The tectonometamorphic events related to subduction...several geodynamic models for the development of that area (Nicolas, 1972; Riding, 1974; Badham, 1975; Carpenter...Armorican orogen. Gravity data are sparse in this area, but they are dense enough to show that the alternation...the earlier ones occur in the eastern part of the area and trend approximately east-west as everywhere...between 362 and 400 m.y. (Autran, 1978). In the same area, many alkaline granites, now transformed into orthogneiss |
 | | Book |
| 233 East Ontario Street, Chicago 60611, Illinois, USA © Longman Group UK Limited 1991 MDPA DIRECTORY...Canada. Two properties previously in the Russell Lake area are at an advanced stage of exploration: the Bugow...commercial support for the group as a whole. In the USA in 1989, Union Zinc purchased the Jefferson City...the Commoner and Old Nic gold mines in the Gatooma area. Capital 30 September 1990 Authorised US$ 11...Income account Income taxes Net income (loss) USA. Year to 30 September Afex Corporation SA (Conafex) |
 | | Book |
| xenocrysts (grain-sized inclusion) in the Yubdo area of Western Ethiopia. Here again we have a mobilization...studies on the mineral parageneses of the Abu Dabbab area (Red Sea region, Egypt) showed that a lithophilic...sphalerite associated with silicates in the marginal area of the pyrite crystal- loblast. However, sphalerite...the particles will tend to possess reduced surface area by uniting, so that they will form coarsely dispersed...continuation of this tendency to possess reduced surface area results in the formation of gel sphaeroids, i. e |
 | | Journal (article/letter/editorial) |
| Ziegenhain ~ 0.8 + 0.5 3916 Biihl near Weimar, area of Kassel + 1.1 + 0.7 --0.4 (c) Olivine alkali...samples t h e T e r t i a r y volcanism of this area a n d the types of rocks which occur are a d e q...possible their existence: (a) Sulfate minerals such as baryte and anhydrite from basalts have never yet been...rocks of the North Itessia and Southern Lower Saxony area are charakterized b y even more deviation, but,...of the Newark group were intrusive, those of the area investigated in this paper are extrusive. I t can |
 | | Report (issue) |
| northern Lesotho. Right in the heart of this desolate area, at Letseng-la-Terai, nestles the world’s highest-lying...(CURACAO) ASBESTOS (AUSTRALIA) COAL (CANADA) GYPSUM (USA) Whatever you're mining, wherever you're mining...Materials.” AMAX Inc., AMAX Center Greenwich, CT 06830 USA Review—1977 seeking new THE NEW ERA HERALDED here...basin except for the Belle Ayr surface mine in Wyoming. At nations but new rules that can be accepted...venture to develop lead-zinc deposits in the Woodlawn area of N.S.W. at an estimated cost of $A77 million |
 | | Book |
| unless there was renewed fumarolic action in the same area. This activity was dominantly subma¬ rine, though...the system would have operated over a very wide area and to depths lo¬ cally of at least 2 km below the...Harrison (1972) describes a basin 130,000 km2 in area filled with a maximum of 20 km of fine-grained elastics...tons of ore at 34 percent Fe are present in one area, which thus qualifies it as the old¬ est known ore...metals in these deposits that cover such a large area is not easy to define (Dunham, 1964; Rentzsch, 1974) |
 | | Book |
| context the diluent. We have much to learn in this area, but at present little help is available. Studies...selected to represent the pervasive quartz veins of the area. The most likely primary source for the cadmium...30 mesh, El Correo area, Sonora, Mexico. The initial identification of the area was based in large part...derived from the head of a stream, the 4 6 8 10 12 AREA OF DRAINAGE BASIN, IN SQUARE MILES 14 Fig. 9....5' в ' 7 ' 8' 9 'io) Background Area Anomaly Margin Anomalous Area Fig. 13. Comparison of lead in |
 | | Book (volume) |
| Department of Geology, University of Florida, USA PERGAMON PRESS OXFORD NEW YORK SEOUL TOKYO U...considered briefly. A few deposits in the central Swedish area are so different in their geologic characteristics...LSngban, Falun, and Garpenberq. Also included in this area is the u n usual lead-zinc sulfide deposit of Ammeberg...southern margin of the central Swedish ore area. The next general area to be considered is that of the Skellefte... sulfur, and iron were recovered from the Avoca area as early as the 16th century and lead and silver |
Newcastle area, Weston County, Wyoming, USA