Добрый день, Коллеги. Важное сообщение, просьба принять участие. Музей Ферсмана ищет помощь для реставрационных работ в помещении. Подробности по ссылке
This chapter describes the regional geographical and geological setting of Connemara. The geology and the spatial distribution of Connemara’s metamorphic and igneous rocks are outlined. The Connemara Metamorphic Complex (CMC) comprises two major rock groupings: the Dalradian metamorphosed sedimentary and igneous rocks and the younger Metagabbro Gneiss Suite. South of Clifden in western Connemara a semi-circular area some 5 km across occurs within the Metagabbro Gneiss Suite and is called the Delaney Dome.
The monograph Geology of Cuba addresses different facets of Cuba’s geological knowledge: cartography, marine geology, fossil record, stratigraphy, tectonics, classification of its ophiolites, quaternary deposits, metallogeny, and minerageny. The contributions are not linked by a common thread, being free versions according to the scientific positions of the authors; therefore, logically, there are contradictory opinions in many cases. However, it is a fabulous scientific work that puts in the hands of the most diverse readers all the wealth of geological knowledge of Cuba, essential for any type of application, exploration, teaching, research, or patrimonial. In itself, it constitutes a notable contribution to the advancement of knowledge of the Geology of Cuba.
Geology came to occupy the pride of place in the country following Independence and rapid industrialization based on Five Year Plans of the Nehru era. Geological Survey of India, the premier earth science organization in the country, was considerably expanded and decentralized to the various States of India. National Research Institutes like the NGRI, PRL, CESS, WIHG, BSIP etc. were encouraged to develop rapidly, and the Universities urged to become centers of excellence.
A phenomenal growth has been achieved in our understanding of the Geology of India since India's Independence through the efforts of the Geological Survey of India and several other State Surveys, exploration agencies, research organizations, universities, institutes and scientific societies. Many of our earlier concepts of geology in relation to structure and tectonics, stratigraphy and sedimentation, magmatism and metamorphism, and metallogeny and mineral deposits have undergone drastic changes with larger inflow of data, synchronising with the evolving global concepts of earth processes.
The earlier, mostly non-geological, exploration reports of Borneo have been listed by Worth (1940). The first reliable geological observations on Sabah were by Hatton (1885), a young mineral explorer employed by the Chartered Company of North Borneo. He met a tragic death while hunting along the Segama River. The most significant publication was that of Posewitz (1892), who summarized the earlier writings of geologists who had journeyed through Borneo. Although, he never set foot in Sarawak or Sabah, but had journeyed through Kalimantan. He collected the literature and compiled a geological map of the known parts of Bomeo. The work was unsystematic and is now obsolete. Rutter (1922) described the journeys of some mineral prospectors in his account of Sabah, but he did not mention the real geological explorers. <...>
For several decades a team of specialists from the field of paleontology has been acting in the Geological Institute. The team has gathered rich material of fossil fauna and flora from drillings and outcrops in several parts of the country (Polish Lowlands, Silesian-Cracow Upland, the Gory Swietokrzyskie Mts and the Carpathians).
Analythical results of studies of the above team of the Geological Institute, especially those obtained in the course of paleontological and biostratigraphic expertises, have as far as possible been published, contributing to the Polish and world biostratigraphic literature. This made it necessary for the Geological Institute, the oldest and biggest centre of geological sciences in the country, to undertake works aimed at gathering museum collections and synthetize most important biostratigraphic information dispersed in various sources.
Works on monograph Atlas skamienialosci przewodnich i chardktery sty cznych, the third volume of Budowa Geologiczna Polski and the first position of that type compiled in our country, were initiated in 1971. The team of researchers of the Geological Institute and the invited specialists from other research centres in the country which took part in that project has been led by Doc. Dr. Lidia Ma-linowska (Head of Laboratory of Paleozoology of Department of Stratigraphy, Tectonics and Paleogeography, Geological Institute) as the General Editor. Thanks to the deep concern of the General Editor, section editors, authors and editorial teams of the Department of Publications, Maps and Text (Geological Institute) and the Publishing House Wydawnictwa Geologiczne, it became possible to publish first of Mesozoic parts of Polish version of the monograph as early as 1979.
Presenting Mesozoic part of the monograph to the foreign Reader, the Geological Institute dedicates this publication unique in Polish geological literature to our paleontologists such as J. B. Pusch-Korenski, J. Siemiradzki, L. Zej-szner, M. Raciborski and others who laid foundations for major achievements of Polish biostratigraphy
The map area, covering 2,250 km", lies in the central part of Spitsbergen, south of Isfjorden. Geological investigations were started by Swedish expeditions in the last half of the 19th century, and the work was continued in the present century mainly by Norwegian expeditions. The region is mountainous, moderately glaciated, but shows a juvenile glacial morphology. The climate is polar. The rock sequence exposed in the area is c. 3,400 m thick and consists of two Permian, six Mesozoic, and six Tertiary formations. The Permian deposits are mainly eherts , cherty limestones, limestones, and sandstones deposited under marine conditions. The Mesozoic-Tertiary sequence is composed generally of shales, siltstones, and sandstones deposited mainly in marine environments, and to a lesser extent under terrestrial conditions. Surficial deposits of Quaternary age are largely of glacial, colluvial, alluvial, and marine origin <...>
This volume, "The Geology of the Arab ian Peninsula," is a logical consequence of the geographic and geologic mapping project of the Arab ian Peninsula, a cooperative venture between the Kingdom of Saudi Arabia and the Government of the United States. The Arabian-American Oil Co. and the U.S. Geological Survey did the fieldwork within the Kingdom of Saudi Arabia, and, with the approval of the governments of neighboring countries, a number of other oil companies contributed additional mapping to complete the coverage of the whole of the Arabian Peninsula. So far as we are aware, this is a unique experiment in geological cooperation among several governments, petroleum companies, and individuals. <...>
The Arizaro and Lindero prospects are possibly the youngest recognised examples of the hydrothermal iron oxide-copper-gold class of deposits in the world. These two prospects, and numerous other iron-oxide manifestations, form a newly discovered district within northwest Argentina. The Arizaro and Lindero prospects are hosted within mid-Miocene, calc-alkaline, dominantly andesitic, volcanic complexes that formed within a convergent plate margin tectonic setting. This descriptive paper presents observations from surface geology and petrographic studies.
The Bingham deposit is centred on a small 40 Ma stock of older, generally equigranular, monzonite that is cut by quartz monzonite porphyry, latite, and quartz latite porphyry dykes. The surrounding country rocks are quartzite and minor but important limestone. A body of fractured rock formed over the top of the monzonite as it cooled leaving a weakly fractured core below a dome of strong fracturing. Early fluids entered this fractured mass at about the time of the intrusion of the first porphyry resulting in an undetermined amount of alteration and mineralisation. This fracturing is a major control on the location of the ore shell and the concentric zoning pattern of alteration and mineralisation. Five porphyry intrusives have been described and each is followed by a cycle of veining, alteration and mineralisation. The porphyries all trend north-easterly across the northern half of the deposit, forming the porphyry trend. At least three overlapping centres of fracturing, alteration and mineralisation seem to be present within the stock, one centred in the fracture dome and two or more in the porphyry trend.
