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Date submitted1986-09-13
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Date accepted1986-11-30
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Date published1987-07-23
Evolution of intrusive magmatism in the history of geologic development and its causes
- Authors:
- V. N. Larin
- Yu. B. Marin
In the geologic history of the Earth, it is currently accepted to distinguish five stages of tectonomagmatic evolution.
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Date submitted1986-09-22
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Date accepted1986-11-29
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Date published1987-07-23
Silicate systems approximating the processes of magmatic petrogenesis
- Authors:
- V. V. Dolivo-Dobrovolsky
An essential aspect of the physical and chemical theory of the processes of magmatic petrogenesis is the comparison of data on the material composition of rocks - members of natural associations - and experimental data on the composition of products of evolution and crystallization of melts in model silicate systems.
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Date submitted1986-09-08
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Date accepted1986-11-25
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Date published1987-07-23
Petromineragenic analysis and questions of typification of ancient hyperbasites
- Authors:
- G. P. Shabaldin
The comparative study of essentially hyperbasite (ultramafic) complexes of the Precambrian and Paleozoic appears to be a rational method of knowing the evolution of magmatism and metamorphism in the history of the formation and transformation of the Earth's crust.
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Date submitted1986-09-06
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Date accepted1986-11-05
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Date published1987-07-23
Some mineralogical criteria for estimation of ore-bearing massifs of rare-metal granitoid formations
Granitoid formations associated with manifestations of orogenic (activation) geodynamic regime often carry rare-metal mineralization.
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Date submitted1986-09-03
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Date accepted1986-11-10
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Date published1987-07-23
Hydrothermal-metasomatic formations of the Pravourmyskoye deposit
- Authors:
- Yu. L. Gulbin
- E. B. Evangulova
In recent years, a number of greisen-type objects of the cassiterite-quartz formation have been identified in the allmetallic regions of the Far East.
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Date submitted1986-09-28
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Date accepted1986-11-05
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Date published1987-07-23
Structural conditions of localization of tin-bearing metasomatites in one of the deposits of the Bajalski ore district (Priamurye)
- Authors:
- V. I. Alekseev
The deposit under study is located within a poorly explored ore district, which makes it necessary to develop criteria for local forecasting of such objects. The basis for such development should be, in particular, the study of the structural position of metassmagites and ores.
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Date submitted1986-09-10
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Date accepted1986-11-24
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Date published1987-07-23
Typization of ore-bearing carbonate-quartz veins and their connection with granitoids in the north of the Taimyr Peninsula
- Authors:
- V. F. Proskurnin
- M. F. Vereshchagin
In recent years, numerous quartz and carbonate-quartz veins with polymetallic mineralization have been identified in the north of the Taimyr-North-Earth folded region within the Mininsko-Bolshevist myogeosynclinal structural-formation zone.
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Date submitted1986-09-24
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Date accepted1986-11-13
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Date published1987-07-23
Dykes of the Mamsko-Chuyskaya muscovite province and their relationship with granites, which are the parent for pegmatites
- Authors:
- M. N. Murashko
In the geologic history of the province several periods of manifestation of bark magmatism are established. Of special interest are the so-called "intra-pegmatite" dikes of granites, accumulations of which are found in many pegmatite fields not only in the Mamsko-Chuyskaya province.
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Date submitted1986-09-03
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Date accepted1986-11-24
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Date published1987-07-23
Main features of formation of plagioclase pegmatites of the Mamsko-Chuyskaya province
- Authors:
- M. A. Ivanov
- S. A. Rudenko
- D. T. Sosin
Plagioclase pegmatites occupy a special place among the mica-bearing objects of the Mamsko-Chuyskaya province, which is associated with the specific geological conditions of their occurrence, composition, structure and mica-bearing.
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Date submitted1986-09-30
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Date accepted1986-11-21
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Date published1987-07-23
Mineral formations - indicators of paleo-stress fields in pegmatites and host rocks
- Authors:
- V. N. Morakhovsky
- V. O. Grigoriev
Any minerals that make up rocks carry information about the tectonic conditions of crystallization and epigenetic stages of their development.
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Date submitted1986-09-20
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Date accepted1986-11-02
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Date published1987-07-23
Types of phenite metasomatites of contact halo of Magan massif (Maimecha-Kotui province)
- Authors:
- E. A. Balmasova
The Magan massif belongs to the Maimecha-Kotui province of alkaline, ultramafic rocks and carbonatites.
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Date submitted1986-09-12
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Date accepted1986-11-08
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Date published1987-07-23
Genetic and mineral types of skarn-magnetite deposits
- Authors:
- G. S. Porotov
To skarn-magnetite deposits belong those that differ markedly in the patterns of location, modes of formation, composition of ores and near-ore metasomatites and many other geologic features.
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Date submitted1986-09-30
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Date accepted1986-11-03
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Date published1987-07-23
Morphology of ore columns in vein tin ore bodies
- Authors:
- Yu. V. Lear
- N. A. Goldvirt
In vein ore bodies, in particular tin ore bodies, the distribution of industrially valuable components is almost always characterized by a high degree of non-uniformity.
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Date submitted1986-09-22
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Date accepted1986-11-20
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Date published1987-07-23
On the most important structural and morphological types of gold deposits in the North-East of the USSR and their geological and industrial evaluation
- Authors:
- V. I. Yakovlev
The structures of native gold deposits in the Northeast of the USSR have repeatedly attracted the attention of geologists.
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Date submitted1986-09-22
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Date accepted1986-11-02
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Date published1987-07-23
Stratiform copper mineralization of hydrothermal-sedimentary type in the Kachar ore field
- Authors:
- E. V. Veselov
- G. S. Porotov
In recent years, several zones and points of copper mineralization have been established at the Kachar magnetite deposit (North Kazakhstan) and adjacent territory.