By J. D. Ridge
This quantity offers bibliographic and textural details which provides a true realizing of the forty ore deposits in Western and West relevant Europe. every one deposit is brought by means of a particular bibliography directory crucial literature. this is often by means of a close dialogue protecting geological features together with the location, grade and tonnage of the ore produced including capability reserve, the stratigraphy and constitution of the rocks of the district, and the features and age of the ore physique. The booklet additionally features a component to maps, pin-pointing an important mineral deposits in every one zone, making this paintings a worthwhile reference resource for all these operating within the fields of ore-deposit geology and exploration
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Additional info for Annotated Bibliographies of Mineral Deposits in Europe. Western and South Central Europe
A great many small deposits of siliceous manganese ore were mined in the early days of modern mining. 2g/t Au; 20-30g/t Ag. Although examples of more complex ore have been known for a long time it was not until the 1970's that these became of major economic importance. This type of ore normally is found in most pyrite bodies, mainly as interbedded layers and lenses in the crude ore or in the foot- or hanging walls of this ore type. The major differences of this ore type from the crude ore is that it is rather lower in sulfur content, higher in lead and zinc, and locally has appreciably higher amounts of arsenic, antimony, mercury, silver, and tin.
No distinct 36 Annotated Bibliographies of Mineral Deposits U-Ti mineral, however, has been found. From a detailed study of uranium in granite and in veins, Basham and his colleagues found that uraninite in unaltered granite occurs as idiomorphic crystals some 200 microns across, around which an alteration halo of micaceous material and pyrite has been accumulated; These crystals and their alteration products are enclosed in feldspar or muscovite. They see no evidence that the primary uraninite was formed in a pegmatitic stage of the granite crystallization.
In addition to these five Portuguese mines, there are seven important mines in the Portugal 41 Spanish sector; this sector generally is known as the Huelva district, and these mines are: (6) Las Herrerias (some 12 km slightly north of west of the Tharsis mine, (7) the Tharsis mine proper (37°36'N, 7°07'W); (8) San Telmo-Perrunal mine which is about 15 km NNW of (9) La Zarza [which last is about 22 km SSW of Rio Tinto - the major mine of the Spanish (or Huelva) sector]; (10) Sotiel-Coronada 13 km slightly west of south of La Zarza and 27 km SSW of Rio Tinto; (11) Rio Tinto (37°42'N, 6°35'W) Mine, (12) a new mine at Aznalcollar (37°31'N,6°16'W) that is outside the Huelva province but here is included in the "Spanish Sector".
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