Expression of Shear-Fault Type Fractures (Ruptures) in the Geomagnetic Field (AR): The Example of the Lisagor Mineral Field

Gagik Varazdat Markosyan; Lyuba Baratov Mirzoyan

doi:doi:10.11648/j.earth.20221103.12

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Expression of Shear-Fault Type Fractures (Ruptures) in the Geomagnetic Field (AR): The Example of the Lisagor Mineral Field

Gagik Varazdat Markosyan, Lyuba Baratov Mirzoyan

Published in Earth Sciences (Volume 11, Issue 3)

Received: 16 April 2022 Accepted: 10 May 2022 Published: 26 May 2022

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Abstract

The article has discussed the possibilities of magnetometry (magnetic prospecting) for mapping shear-fault fractures and the regularities of their separation in a magnetic field. Geological-tectonic preconditions of occurrence of fractures and their significance are represented as mine control structures. Especially shear-fault fractures, in addition to mechanical changes in the domain structure of the environment, lead to disorientation of the magnetic moments of the domain and reduction of the magnetic moment. As a result, the intensity of the geomagnetic anomalous field decreases to a certain extent in the fracture zone, which is sometimes impossible to record during the magnetic survey, especially when the disturbance occurred in the area of complex sedimentary rocks with weak magnetism. The solution to this problem, especially in the folded region, is possible by the presence of a magnetically active horizon with a steep slope (basic dykes, magnetite sandstones, etc.), which has undergone a shear-fault rupture. The article presents the shear-fault type fractures detected by geomagnetic studies in the Lisagore mineral field of AR. These fractures are expressed in several sliding episodes of the magnetically active horizon of the argillites with sandstone interlayers, which is also described in the geological map. The argillites themselves do not have magnetic properties, so their magnetic activity is explained by the presence of magnetite sandstones thin interlayers, which are described by a series of high-intensity linear anomalies of T field that are interrupted and deviated from each other by the magnitude of the amplitude of the slide at the fracture sites.

Published in	Earth Sciences (Volume 11, Issue 3)
DOI	10.11648/j.earth.20221103.12
Page(s)	63-68
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Tectonic Fracture, Shear-Fault, Magnetometry, Magnetic Anomaly

References

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[2]	Logachev A. A., Zakharov V. P., Magnitorazvedka. L. Nedra, 1979, 351 p.
[3]	Magnetic prospecting: Handbook of geophysics./Under. Editor V. E. Nikitisky and Yu. S. Glebovsky.-M.; Nedra, 1980.
[4]	Khmelevskoy V. K. Geophysical methods of research of the earth's crust. International University of nature, society and man, Dubna, 1999, 203p.
[5]	Gabrielyan A. A., Sarkisyan O. A., Simonyan G. P., Seismotectonics of the Armenian SSR. YSU, Yerevan, 1981, 283p.
[6]	Nazaretyan S. N., Durgaryan R. R., Shakhbekyan T. H., Grigoryan A. G., Mirzoyan L. B.- Regional faults of the territory of Armenia according to geophysical data and their seismicity. Yerevan 2015, Gitutyun, 183p.
[7]	Nazaretyan S. N., Mikaelyan E. M., Mirzoyan L. B., Fault systems and tectonic active regional faults in the territory of Armenia, Bulletin of the Mining University of Ukraine, N11, 2007, pp. 34-37.
[8]	Tevelev Ark. V. Shear tectonics. M.: Publishing House of Moscow. un., (2005), 254p.
[9]	Physical properties of rocks and minerals. (Petrophysics) Handbook of geophysics. /Under. Ed. N. B. Dortman, - M., "Nedra" (1992), 391p.
[10]	Kishnarev I. P., Methods for studying fractures. Nedra, Moscow, 1977, 248 p.
[11]	Kuznetsov N. S, Filatov V. P, Savelyev V. P, Tectonophysical analysis of geophysical fields; Application experience in geological surveys; Proceedings of the Ural state mining and geological academy, series; Geology and geophysics, 2000, N10.
[12]	Strakhov V. N, Methods of interpretation of gravitational and magnetic anomalies. Perm, Perm University, 2004.
[13]	Markosyan G. V. Spatial paleomagnetic anisotropy of geological environment (Monograph), LAP LAMBERT Academik Publishing, 2019, p. 114.
[14]	Avchyan G. M., Markosyan G. V. Connection of the direction of destruction of rocks with paleomagnetic layering, Izvestiya AS Arm. SSR, Earth Sciences, N6, 1988.
[15]	Markosyan G. V. Report on geophysical works carried out at the Lisagore copper mining site of the NKR, Stepanakert, Fund of the "Future Generations" Foundation, 2015, 60 p.

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Gagik Varazdat Markosyan, Lyuba Baratov Mirzoyan. (2022). Expression of Shear-Fault Type Fractures (Ruptures) in the Geomagnetic Field (AR): The Example of the Lisagor Mineral Field. Earth Sciences, 11(3), 63-68. https://doi.org/10.11648/j.earth.20221103.12

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ACS Style

Gagik Varazdat Markosyan; Lyuba Baratov Mirzoyan. Expression of Shear-Fault Type Fractures (Ruptures) in the Geomagnetic Field (AR): The Example of the Lisagor Mineral Field. Earth Sci. 2022, 11(3), 63-68. doi: 10.11648/j.earth.20221103.12

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AMA Style

Gagik Varazdat Markosyan, Lyuba Baratov Mirzoyan. Expression of Shear-Fault Type Fractures (Ruptures) in the Geomagnetic Field (AR): The Example of the Lisagor Mineral Field. Earth Sci. 2022;11(3):63-68. doi: 10.11648/j.earth.20221103.12

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@article{10.11648/j.earth.20221103.12,
  author = {Gagik Varazdat Markosyan and Lyuba Baratov Mirzoyan},
  title = {Expression of Shear-Fault Type Fractures (Ruptures) in the Geomagnetic Field (AR): The Example of the Lisagor Mineral Field},
  journal = {Earth Sciences},
  volume = {11},
  number = {3},
  pages = {63-68},
  doi = {10.11648/j.earth.20221103.12},
  url = {https://doi.org/10.11648/j.earth.20221103.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20221103.12},
  abstract = {The article has discussed the possibilities of magnetometry (magnetic prospecting) for mapping shear-fault fractures and the regularities of their separation in a magnetic field. Geological-tectonic preconditions of occurrence of fractures and their significance are represented as mine control structures. Especially shear-fault fractures, in addition to mechanical changes in the domain structure of the environment, lead to disorientation of the magnetic moments of the domain and reduction of the magnetic moment. As a result, the intensity of the geomagnetic anomalous field decreases to a certain extent in the fracture zone, which is sometimes impossible to record during the magnetic survey, especially when the disturbance occurred in the area of complex sedimentary rocks with weak magnetism. The solution to this problem, especially in the folded region, is possible by the presence of a magnetically active horizon with a steep slope (basic dykes, magnetite sandstones, etc.), which has undergone a shear-fault rupture. The article presents the shear-fault type fractures detected by geomagnetic studies in the Lisagore mineral field of AR. These fractures are expressed in several sliding episodes of the magnetically active horizon of the argillites with sandstone interlayers, which is also described in the geological map. The argillites themselves do not have magnetic properties, so their magnetic activity is explained by the presence of magnetite sandstones thin interlayers, which are described by a series of high-intensity linear anomalies of T field that are interrupted and deviated from each other by the magnitude of the amplitude of the slide at the fracture sites.},
 year = {2022}
}

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TY  - JOUR
T1  - Expression of Shear-Fault Type Fractures (Ruptures) in the Geomagnetic Field (AR): The Example of the Lisagor Mineral Field
AU  - Gagik Varazdat Markosyan
AU  - Lyuba Baratov Mirzoyan
Y1  - 2022/05/26
PY  - 2022
N1  - https://doi.org/10.11648/j.earth.20221103.12
DO  - 10.11648/j.earth.20221103.12
T2  - Earth Sciences
JF  - Earth Sciences
JO  - Earth Sciences
SP  - 63
EP  - 68
PB  - Science Publishing Group
SN  - 2328-5982
UR  - https://doi.org/10.11648/j.earth.20221103.12
AB  - The article has discussed the possibilities of magnetometry (magnetic prospecting) for mapping shear-fault fractures and the regularities of their separation in a magnetic field. Geological-tectonic preconditions of occurrence of fractures and their significance are represented as mine control structures. Especially shear-fault fractures, in addition to mechanical changes in the domain structure of the environment, lead to disorientation of the magnetic moments of the domain and reduction of the magnetic moment. As a result, the intensity of the geomagnetic anomalous field decreases to a certain extent in the fracture zone, which is sometimes impossible to record during the magnetic survey, especially when the disturbance occurred in the area of complex sedimentary rocks with weak magnetism. The solution to this problem, especially in the folded region, is possible by the presence of a magnetically active horizon with a steep slope (basic dykes, magnetite sandstones, etc.), which has undergone a shear-fault rupture. The article presents the shear-fault type fractures detected by geomagnetic studies in the Lisagore mineral field of AR. These fractures are expressed in several sliding episodes of the magnetically active horizon of the argillites with sandstone interlayers, which is also described in the geological map. The argillites themselves do not have magnetic properties, so their magnetic activity is explained by the presence of magnetite sandstones thin interlayers, which are described by a series of high-intensity linear anomalies of T field that are interrupted and deviated from each other by the magnitude of the amplitude of the slide at the fracture sites.
VL  - 11
IS  - 3
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Author Information

Gagik Varazdat Markosyan

Faculty of Geography and Geology, Yerevan State University, Yerevan, Armenia
Lyuba Baratov Mirzoyan

Faculty of Geography and Geology, Yerevan State University, Yerevan, Armenia

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APA Style

Gagik Varazdat Markosyan, Lyuba Baratov Mirzoyan. (2022). Expression of Shear-Fault Type Fractures (Ruptures) in the Geomagnetic Field (AR): The Example of the Lisagor Mineral Field. Earth Sciences, 11(3), 63-68. https://doi.org/10.11648/j.earth.20221103.12

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ACS Style

Gagik Varazdat Markosyan; Lyuba Baratov Mirzoyan. Expression of Shear-Fault Type Fractures (Ruptures) in the Geomagnetic Field (AR): The Example of the Lisagor Mineral Field. Earth Sci. 2022, 11(3), 63-68. doi: 10.11648/j.earth.20221103.12

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AMA Style

Gagik Varazdat Markosyan, Lyuba Baratov Mirzoyan. Expression of Shear-Fault Type Fractures (Ruptures) in the Geomagnetic Field (AR): The Example of the Lisagor Mineral Field. Earth Sci. 2022;11(3):63-68. doi: 10.11648/j.earth.20221103.12

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@article{10.11648/j.earth.20221103.12,
  author = {Gagik Varazdat Markosyan and Lyuba Baratov Mirzoyan},
  title = {Expression of Shear-Fault Type Fractures (Ruptures) in the Geomagnetic Field (AR): The Example of the Lisagor Mineral Field},
  journal = {Earth Sciences},
  volume = {11},
  number = {3},
  pages = {63-68},
  doi = {10.11648/j.earth.20221103.12},
  url = {https://doi.org/10.11648/j.earth.20221103.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20221103.12},
  abstract = {The article has discussed the possibilities of magnetometry (magnetic prospecting) for mapping shear-fault fractures and the regularities of their separation in a magnetic field. Geological-tectonic preconditions of occurrence of fractures and their significance are represented as mine control structures. Especially shear-fault fractures, in addition to mechanical changes in the domain structure of the environment, lead to disorientation of the magnetic moments of the domain and reduction of the magnetic moment. As a result, the intensity of the geomagnetic anomalous field decreases to a certain extent in the fracture zone, which is sometimes impossible to record during the magnetic survey, especially when the disturbance occurred in the area of complex sedimentary rocks with weak magnetism. The solution to this problem, especially in the folded region, is possible by the presence of a magnetically active horizon with a steep slope (basic dykes, magnetite sandstones, etc.), which has undergone a shear-fault rupture. The article presents the shear-fault type fractures detected by geomagnetic studies in the Lisagore mineral field of AR. These fractures are expressed in several sliding episodes of the magnetically active horizon of the argillites with sandstone interlayers, which is also described in the geological map. The argillites themselves do not have magnetic properties, so their magnetic activity is explained by the presence of magnetite sandstones thin interlayers, which are described by a series of high-intensity linear anomalies of T field that are interrupted and deviated from each other by the magnitude of the amplitude of the slide at the fracture sites.},
 year = {2022}
}

Copy | Download

TY  - JOUR
T1  - Expression of Shear-Fault Type Fractures (Ruptures) in the Geomagnetic Field (AR): The Example of the Lisagor Mineral Field
AU  - Gagik Varazdat Markosyan
AU  - Lyuba Baratov Mirzoyan
Y1  - 2022/05/26
PY  - 2022
N1  - https://doi.org/10.11648/j.earth.20221103.12
DO  - 10.11648/j.earth.20221103.12
T2  - Earth Sciences
JF  - Earth Sciences
JO  - Earth Sciences
SP  - 63
EP  - 68
PB  - Science Publishing Group
SN  - 2328-5982
UR  - https://doi.org/10.11648/j.earth.20221103.12
AB  - The article has discussed the possibilities of magnetometry (magnetic prospecting) for mapping shear-fault fractures and the regularities of their separation in a magnetic field. Geological-tectonic preconditions of occurrence of fractures and their significance are represented as mine control structures. Especially shear-fault fractures, in addition to mechanical changes in the domain structure of the environment, lead to disorientation of the magnetic moments of the domain and reduction of the magnetic moment. As a result, the intensity of the geomagnetic anomalous field decreases to a certain extent in the fracture zone, which is sometimes impossible to record during the magnetic survey, especially when the disturbance occurred in the area of complex sedimentary rocks with weak magnetism. The solution to this problem, especially in the folded region, is possible by the presence of a magnetically active horizon with a steep slope (basic dykes, magnetite sandstones, etc.), which has undergone a shear-fault rupture. The article presents the shear-fault type fractures detected by geomagnetic studies in the Lisagore mineral field of AR. These fractures are expressed in several sliding episodes of the magnetically active horizon of the argillites with sandstone interlayers, which is also described in the geological map. The argillites themselves do not have magnetic properties, so their magnetic activity is explained by the presence of magnetite sandstones thin interlayers, which are described by a series of high-intensity linear anomalies of T field that are interrupted and deviated from each other by the magnitude of the amplitude of the slide at the fracture sites.
VL  - 11
IS  - 3
ER  -

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