On plotting the scheme of fracture-mega-block tectonics of the Ukrainian Shield in a scale 1:500 000
Journal Title: Геофизический журнал - Year 2017, Vol 39, Issue 5
Abstract
The main principles have been proposed for discussion on composing the Scheme of fracrture-mega-block tectonics of the Ukrainian Shield in a scale 1 : 500 000 supported by a decision of Inter-departmental tectonic committee of Ukraine as a basis for plotting the Tectonic map of the Ukrainian Shield in the mentioned scale. The existing maps and schemes of the blocky subdivision of the Ukrainian Shield considerably differ from each other especially because the fact that the unified principles of blocky and especially mega-blocky subdivision for the whole shield were not yet formulated then and the criteria for subdivision and mapping of inter-mega-block fracture zones were not supported. Such criteria are being considered in this work, and examples of schemes of fracture-block tectonics of three sheets in a scale 1 : 200 000 composed on their base have been given. It is proved that the Scheme of fracture-mega-block structure of the Ukrainian Shield must reflect the present-day blocky subdivision of the earth crust formed at the border of Early and Middle Proterozoic, at the very end of establishment of the granite socle of the shield. Only such mega-blocks and blocks and in the first place fault zones, which separate them, may be exactly identified and mapped that is an important condition, because the most part of deposits and ore manifestations of the shield are just related to the fracture zones. More ancient margins of mega-blocks and fault zones in the areas of Early Proterozoic tectonic-magmatic activation are hypothetical and cannot be mapped unambiguously. It has been shown that while plotting the Scheme of fracture-mega-block tectonics of the Ukrainian Shield the priority belongs to geophysical methods.
Authors and Affiliations
O. B. Gintov, V. A. Yentin, S. V. Mychak
Keywords
Related Articles
- EP ID EP243607
- DOI 10.24028/gzh.0203-3100.v39i5.2017.112340
- Views 82
- Downloads 0
The structure of the Earth’s crust of the central part of the Holovanivsk suture zone according to the reinterpretation of materials of IV geotraverse of DSS (PK 295—400)
The paper presents the results of reinterpretation of the materials obtained as a result of studies using the DSS method along the IV geotraverse at the site PK 295—400. The reinterpretation was carried out purposefully...
Geoelectric studies of the oil and gas bearing area on the southern slope of the central Dnieper-Donets Basin part
In 2017 modern synchronous magnetotelluric and magnetovariational investigations were carried out on the Nesseno-Irzhuets—Abramovka profiles in eleven points for the study of the deep structure of the central part of the...
To the problem of engineering construction of territories assessment based on local natural and technogenic factors (Reni district, Odessa region as an example)
This article is devoted to the problem of influence of local natural and technogenic factors on the engineering geological conditions change of building sites, the Reni district of Odessa region as an example. In the art...
From global tectonics to global geodynamics
Observations suggest that global (plate) tectonics operates on the Earth. The most characteristic features of the global tectonics are ocean floor spreading in mid-ocean ridges and subduction in deep-sea trenches. These...
A new technology for estimating time shifts in seismic monitoring of the exploitation of oil and gas fields and underground gas storage sites
The process of exploitation of oil and gas fields and underground natural gas and CO2 storage facilities is accompanied by time-dependent changes in the physical properties of both the reservoir itself and the overburden...