Добрый день, Коллеги. Важное сообщение, просьба принять участие. Музей Ферсмана ищет помощь для реставрационных работ в помещении. Подробности по ссылке
The Eocene Green River Formation in Wyoming has long served as a standard for lacustrine depositional systems. This lacustrine formation, excluding the culminating phase, was deposited in a closed hydrographic basin. The position of the boundary between lake and mudflat margin was dictated by the inflow evaporation ratio (inflow greater than evaporation = transgression; inflow less than evaporation = regression).
The great surge of interest and activity in exploration for uranium deposits over the last decade has added significantly to our knowledge of uranium geology and the nature of uranium deposits. Much of the information that has been developed by government and industry programmes has not been widely available and in many cases has not had the benefit of systematic gathering, organization and publication. With the current cut-back in uranium exploration and research efforts there is a real danger that much of the knowledge gained will be lost and, with the anticipated resurgence of activities, will again have to be developed, with a consequent loss of time, money and effort. In an effort to gather together the most important information on the types of uranium deposits, a series of reports is being prepared, each covering a specific type of deposit. These reports are a product of the Agency's Working Group on Uranium Geology. This group, which has been active since 1970, has gathered and exchanged information on key questions of uranium geology and co-ordinated investigations on important geological questions. The projects of the Working Group on Uranium Geology and the project leaders are:
Sedimentary Basins and Sandstone Type Deposits — Warren Finch
Uranium Deposits in Proterozoic Quartz-Pebble Conglomerates — Desmond Pretorius
Vein Type Uranium Deposits — Helmut Fuchs
Proterozoic Unconformity and Stratabound Uranium Deposits — John Ferguson
Surficial Deposits — Dennis Toens
The success of the projects is due to the dedication and efforts of the project leaders and their organizations, and the active participation and contribution of world experts on the types of deposits involved. The Agency wishes to extend its thanks to all involved in the projects for their efforts. The reports constitute an important addition to the literature on uranium geology and as such are expected to have a warm reception by the Member States of the Agency and the uranium community, world-wide.
A special word of thanks is extended to Warren Finch for his work in organizing and guiding this project and for editing the text, and to Jim Davis for his participation in the editing of this report on sandstone type uranium deposits.
The Republic of Georgia encompasses pan of the Alpine Himalayan fold belt; it extends from the northern slope of the Greater Caucasus to the Lesser Caucasus in the south, a geologically complex zone sandwiched between two lithospheric plates, the Afro-Arabian (Gondwana) and the Eurasian plates. More specifically it consists of the Greater Caucasus Range
to the north and the Transcaucasus to the south (Fig.l). The sutured boundary (the Sevan-Акега zone) lying between the Transcaucasus and the Lesser Caucasus to the south is effectively the northern margin of Gondwana. The northern boundary, between the Caucasus Mountains (sensu stricto) and the Scythian Platform, the southerly projection of the Russian Platform, is less clearly defined due to the superposition or panial superposition... <...>
THIS book is intended for the use of students studying geology for the first time, particularly those entering the Advanced Level and First Year University examinations. It is not in any way an exhaustive treatise on geological maps, but is meant to serve as an introduction to their interpretation and solution. The book should not be regarded as an end in itself, nor should the somewhat mechanical manner of this early treatment be more than a means of developing the capacity for the three-dimensional viewing of a geological map and an appreciation of the patterns developed in rock relationships. Diagram maps must lead very quickly to the study of geological maps of specific areas of country: the ideal maps for such study are those produced by the Geological Surveys of such countries as Great Britain, Australia and the Americas.
My thanks are due to Professor F. H. T. Rhodes and to Dr. R. L. Austin for reading the manuscript and making many helpful suggestions. I would also thank Mrs. Greir Lewis for her help in the preparation of some of the diagrams and the Secretarial staff of University College, Swansea, for their help in typing the manuscript. I owe a particular debt of thanks to Mr. H. McKee who has prepared the index, and to Dr. K. G. Stagg who has read the proofs and helped in correcting them.
This book is written as a practical field manual to be used by geologists engaged in mineral exploration. It is also hoped that it will serve as a text and reference for students in Applied Geology courses of universities and colleges. The book aims to outline some of the practical skills that turn the graduate geologist into an explorationist. It is intended as a practical “how to” book, rather than as a text on geological or ore deposit theory.<...>
This book is written as a practical field manual to be used by geologists engaged in mineral exploration. It is also hoped that it will serve as a text and reference for students in Applied Geology courses of universities and colleges. The book aims to outline some of the practical skills that turn the graduate geologist into an explorationist:. It is intended as a practical 'how to' book, rather than as a text on geological or ore deposit theory. An explorationist is a professional who searches for ore bodies in a scientific and structured way. Although an awkward and artificial term, this is the only available word to describe the totality of the skills which are needed to locate and define economic mineralization.
Understanding the relationships between strata forms the basis for much geological knowledge – and these patterns are displayed on geological maps. Dominique Frizon de Lamotte and colleagues from the CY Cergy Paris Université, on the outskirts of Paris, have put together this lavishly illustrated manual to assist in these endeavors. As they note, the observation, interpretation and construction of 3D models lies at the heart of applied geology and has driven many of the great discoveries in the science. This book is about structural geology – especially interpreting the geometry of layered strata where they become folded and faulted. The starting point is the geological map, and the challenge – understanding and communicating this understanding to others – has been at the forefront of the skill set required by geologists since the birth of the science. <...>
GEOLOGICAL maps represent the expression on the earth’s surface of the underlying geological structure. For this reason the ability to correctly interpret the relationships displayed on a geological map relies heavily on a knowledge of the basic principles of structural geology.
The great classical tectcnicians, such as Suess, Argand and Wegener, att empted (0 und erstand. without the benefi t of the plate tecto nic theory. the workings of the Ea rth engine as a who le, and the part that deformation played in that who le. In my student days, I deri ved great pleasure and benefit from De Sitter's textbook on str uctural geology where the study of geo logical structures and major Earth structure received more or less equal rreatment. Since then, until relatively recently, there has been a tendency for str uctu ral geology to become more parochial and inward-looking, despite the enormous advances in understand ing that the plate tectonic revolutio n has brought abo ut. I have longfelt the need, therefo re, for a bo ok tha t would give students a tectonic overview in which geo logical structures and deformation could be seen in their context as byproducts of the plate tectonic system <...>
