Добрый день, Коллеги. Важное сообщение, просьба принять участие. Музей Ферсмана ищет помощь для реставрационных работ в помещении. Подробности по ссылке
The Genesis and Blue Star sedimentary rock-hosted gold deposits occur within the 40-mile-long Carlin trend and are located in Eureka County, Nevada. The deposits are hosted within the Devonian calcareous Popovich Formation, the siliciclastic Rodeo Creek unit and the siliciclastic Vinini Formation. The host rocks have undergone contact metamorphism, decalcification, silicification, argillization, and supergene oxidation.
In recent years media attention has focused on global climate change and the impacts on the human experience that this may cause. This interest has stimulated earth scientists into a re-appraisal of the rates of change seen in the geological record and which, for years, had been taken for granted. Climatic modelling and other palaeoclimate assessments have reversed the geological adage that the 'present is the key to the past' into 'the past may be the key to the future'. This renewed interest was the driving force behind the European Palaeontological Association's Congress in Vienna <...>
This book discusses new insights concerning the influence of the climate upon the earth’s relief, in particular upon the continents. It has been found that this climatic, this exogenic influence is much stronger than any endogenous influence. Endogenous forces, as any geologic map will show, are distributed randomly over the entire earth, while the exogenic influence of climate follows strict rules in its distribution from the pole to the equator, both today as in the past. Their distribution and intensity make climatic influences the best basis upon which to found a system of geomorphology, such as the one presented here.
Climatic Geomorphology constitutes a new look at a fairly old subject that has been largely ignored in other more recent trends in the field, particularly in much process geomorphology. But now Mateo Guti6rrez, well-known Professor of Geomorphology at the University of Zaragoza in northeast Spain, has presented us with this new volume, translated into English by ten of his colleagues.
The present reports pretends to show the evolution and closure of Mina Angela, a Au-Ag–Cu–Pb-Zn mine, located in the Chubut Province (Argentina). The description will be done in chronological way, as there are several dates that are very important, especially from the legal point of view. <...>
Cost indexes provide a mechanism for adjusting outdated cost information and for tracking cost inflation in the mining industry. Table 1 lists a variety of indexes for specific mining cost centers and provides some guidance for their use. Table 2 lists current and historical values for the indexes. Table 3 lists U.S. Producer Price Indexes and Consumer Price Indexes. These are generally recognized as reliable measures of general inflation in the U.S. economy, and they serve as a comparison to the inflation experienced by the mining industry <...>
This book arises from a two day international conference held at the Geological Society of London in November 1998. The meeting was organized with the purpose of bringing together sedimentologists, geomorphologists, archaeologists, environmental scientists and environmental managers to discuss recent research and topical issues relating to the interactions between natural processes, morphology and human activities in coastal and estuarine environments. More than 200 delegates, from 16 countries, attended the meeting over the course of the two days, stimulating lively discussion both about basic scientific issues and management implications. The meeting was sponsored by the British Sedimentological Research Group, the British Geomorphological Research Group, and English Heritage, and was also supported by the Environmental Sedimentology Committee of the International Association of Sedimentologists. The editors would like to thank these organizations, together with staff at the Geological Society and numerous daily helpers, especially postgraduate students and others from the University of Reading, for their generous assistance in making the meeting a great success
Interest in sediment dynamics is generated by the need to understand and predict: (i) morphodynamic and morphological changes, e.g. beach erosion, shifts in navigation channels, changes associated with resource development; (ii) the fate of contaminants in estuarine, coastal and shelf environment (sediments may act as sources
and sinks for toxic contaminants, depending upon the surrounding physico-chemical conditions); (iii) interactions with biota; and (iv) of particular relevance to the present Volume, interpretations of the stratigraphic record. Within this
context of the latter interest, coastal and shelf sediment may be regarded as a non-renewable resource; as such, their dynamics are of extreme importance. Over the years, various approaches and techniques have been applied to the determination of sediment transport pathways and the derivation of erosion, transport, and deposition rates. Such wide-ranging approaches include the refinement and application of numerical modelling; and the development of new and more efficient field equipment, e.g. video systems (coastal/ inshore) and multibeam. <...>
