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In the monograph of B. G. Shadrin “At beginnings of Permian industrial mining”, the history of development of the copper, gold, diamonds, and salt mining in XVIII– XX century is described.
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Приведены библиография и краткие аннотации монографий, учебных пособий и тематических сборников статей сотрудников геологического факультета Пермского госуниверситета за 2018г.
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Рецензируется новая монография коллектива авторов, посвященная различным аспектам геологического строения территории заказника «Предуралье», где находится учебно-научная база Пермского государственного национального исследовательского университета. В книге приводится оригинальный материал по стратиграфии, литологии, геохимии и комплексным геофизическим исследованиям на территории заказника.
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New monograph “Regional minerageny of general industrial mineral resources (on the example of Perm Region)” by R.Iblaminov and A.Alvanyan is presented. The book describes geological structure of territory and peculiarities of regional common, historical and genetic minerageny. The geology-industrial types of common commercial mineral resources of Perm Region are described.
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The article presents the first results of the study of native platinum extracted from chondrite. The native platinum forms microinclusions in carbonaceous matter andchromites, which are found in ordinary chondrite. Native platinum forms micrograins and aggregates of cubic microcrystals, most of which are free from impurities. The composition of platinum-containing chromites corresponds to terrestrial analogues of ultrabasic mantle rocks. Assumption about the magmatic origin of platinum-containing carbon is made.
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Rare metals bearing alkaline complexes are quite uncommon on the western slope of the Urals. The Kozlinogorskiy complex is situated in the Ufaley block related to the junction zone of the Urals and the East European Platform. Gabbro, syenites, granosyenites and granites comprise the complex. Their alkaline nature is proved by the presence of aegirine, riebeckite, astrophyllite, enigmatite. Rocks are characterized by the ratio of rare elements and fluid regime features indicating the participation of the mantle plume in their genesis. The plume formation could be an energy and material source that initiated the process of reopening of the ancient rift structure. Alkaline plume–dependent series on the western slope of the Urals have been recorded more frequently last time, indicating the significant role of plume tectonics in the geodynamics of the early stages of the structure evolution.
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New data on the material composition of the Severny Kolchim meteorite, found in the Perm region territory in 1965, is presented. It is established that the cosmic substance is composed of forsterite, enstatite, diopside, plagioclase (oligoclase, bitovnite), glass, chromite, magnetite, ilmenite, rutile, iron and nickel metals (kamasite, taenite and tetrataenite), sulphides (troilite, pentlandite), chlorapatite and merrillite. Some minerals, namely the diopside, tetrataenite, chlorapatite and merrillite, were determined in the Severny Kolchim meteorite first time. The data on the chemical composition of minerals and the trace element composition are given. It was verified that this meteorite is a nonequilibrium stone chondrite and belongs to the petrological type H3.
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An overview of a geological structure of Nurali massif is presented. Compositional data of ultramafic rocks from mantle section and transitional mantle-crust assemblages, and chemistry of accessory and ore-forming Cr spinels are examined. We showed that ultramafic rocks from mantle section (spinel a spinel-plagioclase peridotites, harzburgites, dunites) are the tectonites. They have a strong predominantly optical orientation of rock-forming olivine due to a plastic flow of rocks. We presented different points of view on the mantle-crust assemblage origin, which composed by wehrlites, clinopyroxenites, vebsterites, dunites and melanocratic gneiss-like gabbro, and described two PGE-occurrences in the chromitites of this ophiolite section unit. This paper is based on a guidebook of an International field trip to Nurali massif as a part of conference “Magmatism of the Earth and related deposits of strategic metals” held in 2017 August
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The results of a comprehensive study of a slag-like sideritolite, a representative of a previously unknown genetic type of rock, are summarized. The nano- microstructural features, chemical composition, trace elements, the constitution and the spectroscopic properties of the pore-forming and accessory minerals were investigated. Using the mineralogical and ontogenetic method, the history of rock formation was defined. Penoliths, the slag-like sideritolite, may be identified as a new genetic type of endogenous rocks formed directly in the bubbly foam.
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The mechanisms and sources of magma generation for the large Permian Aduyskiy granite massif, well known for rare metal, semi-precious stone and molybdenum deposits, are considered. Valuable information was obtained from study of the Kamenskiy and Krutikhinskiy massifs located at the base of Aduyskiy granite body. The migmatites of these two massifs as well as the accompanying partial melting have approximately the same zircon and Rb-Sr age. These processes range about 309-298 Ma in the Kamenskiy and 308-283 Ma in Krutikhinskiy massifs with the main and most intense stage within 296-298 Ma. That time, the main volume of the granite melt for Kamenskiy, Krutikhinskiy, and Aduyskiy massifs was formed. The migmatites of magma generation zone have banded texture in Kamenskiy massif, but, in Krutikhinskiy massif, anatectic melt formed the numerous veins and small intrusive bodies. These magmatic differences were formed mainly due to protolith composition. Камenskiy migmtites are characterized by Devonian – Carboniferous quartz diorites and granodiorites. Predominantly granitic rocks are characteristic for Krutikhinskiy massif. Basic dykes accompanied the migmatization in both massifs.
