Boris M. Sedov (b. 1933) – Doctor of geological and mineralogical Sciences, researcher at the North-Eastern Scientific and Research Institute, professor at the North-Eastern State University, geophysicist. He has beenengaged in the search and exploration of oil fields, deep and buried placers of gold, the study of the deep structure of the earth and the nature of the seismicity of North-East Asia and the shelf adjacent seas for almost 70 years. During his studies at the Geological Exploration College, then at the Leningrad Mining Institute, he worked in the Krasnodar Region, conducted airborne studies in the polar regions of Western Siberia, where later giant gas fields were discovered, thanks to which Russia is still the leader in its production in the world. During the II International Geophysical Year (1958–1959) he participated in the first deep seismic sounding of the Earth, conducted in Karelia and then in the North-East of the USSR. The North was so fascinating that the choice of the place of work was determined unambiguously – the North-East.
The book explores the Upper Reaches of the Ola River manifestation of gems located in the Okhotsk-Chukotka volcanic belt along the Northern coast of the Sea of Okhotsk. Here can be found agates and basalts exposed over a large area. Due to this, the effusive strata has been the object of long-term studies, the data of which are used to reveal the nature and unique features of these gems which occur naturally in this area. As a result, there are a number of fundamental issues relating to the origin of these mineralized thermal waters which serve as a source of the substance that comprises the nature, the shape of the feed channels and their relationship with the dyke complex, as well as the pulsating nature of changes in pressure and temperature.
Their types are determined by such mineral reference points as opal and hyalite. In the form of geodes in basalts it was found that the hydrodynamic conditions of their formation in lava flows differed significantly from the stagnant situation in the domes confined to the zone of the paleovolcano vent. Its position and structure are now established for the first time. The book contains over 200 photographs of agates found in the Upper-Reaches of the Ola River that are exceptional, unparalleled even when compared with wellknown commercial deposits of these gems. The illustrative part of the book will certainly be of interest to both geologists and the more numerous lovers and collectors of gems. The English text allows foreign readers to get acquainted with these natural treasures of Russia.
Объём: 244 стр
Год издания: 2019
Translated: into English