By J. D. Ridge
This quantity presents bibliographic and textural info which supplies a true figuring out of the forty ore deposits in Western and West relevant Europe. every one deposit is brought by means of a particular bibliography directory an important literature. this can be by means of a close dialogue protecting geological features together with the location, grade and tonnage of the ore produced including power reserve, the stratigraphy and constitution of the rocks of the district, and the features and age of the ore physique. The ebook additionally contains a component to maps, pin-pointing crucial 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 resources for Annotated Bibliographies of Mineral Deposits in Europe. Western and South Central Europe
Nor is there any reason for thinking that the sulfides in Panasqueira as opposed to those in Cornwall, in contradistinction to the oxides and oxy-salts, were deposited under hypothermal conditions. Instead they very probably were deposited in the kryptothermal range (the equivalent in the xenothermal type of ore formation to mesothermal in the hypothermal category). A large proportion of the work of Kelly and Rye on the Panasqueira materials dealt with the oxygen and hydrogen isotopes and the ratios particularly of ^ 0 and -^0 and H and D.
This presence of both a copper and calcium mineral in relative abundance suggests that the primary deposit contained a modest amount of chalcopyrite. Cameron (1982) suggests that the mineralization process took place in six phases: (1) initial fracturing followed by white quartz veining associated with sericitization of the wall rock and locally minor 34 Annotated Bibliographies of Mineral Deposits chloritization and tourmalinization; (2) normally red-jasper-hematitization - in places; ferruginous quartz or banded black and white quartz may substitute for red jasper and sulfides - mainly pyrite, chalcopyrite, sphalerite, and galena-may be present; (3) fracturing renewed and first pitchblende occurs, either massive in veinlets or microbotryoidal as disseminations in dark cryptocrystalline quartz; (4) second pitchblende in sooty microbotryoidal form loosely associated with vein quartz; (5) fault breccias, kaolinization, and calcite deposition; (6) recent alteration to produce limonite and secondary uranium minerals; all these phases obviously were continuous and overlapping.
The results obtained from non-boiling fluids required some positive correction for the pressure existing at the moment that the fluid was trapped. This boiling occurred over the entire range of temperatures determined, yet these authors found that they obtained the same range of temperatures of filling from fluids that were boiling and from those that were not. They explain this phenomenon by pointing out that the vapor (or gas) separating at filling time was not simply steam but actually was a C0 2-dominated vapor.
Annotated Bibliographies of Mineral Deposits in Europe. Western and South Central Europe by J. D. Ridge