The Petrophysical Characteristics of Tectonic Structures in the Western Okhotsk Region

The physical properties of rocks from the western Okhotsk region were studied and petrophysical maps were constructed to highlight the petrophysical features of tectonic elements of the territory. Petrophysical heterogeneities and anomalies of the respective geophysical fields were compared. The rel...

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Bibliographic Details
Published in:Russian journal of Pacific geology 2022-08, Vol.16 (4), p.349-368
Main Authors: Ivolga, E. G., Gurovich, V. G., Manilov, Yu. F.
Format: Article
Language:English
Subjects:
Earth and Environmental Science
Earth Sciences
Fields
Geology
Gravity anomalies
Magnetic anomalies
Magnetic properties
Mesozoic
Physical properties
Rock
Rock properties
Rocks
Volcanic belts
Volcanoes
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Summary:The physical properties of rocks from the western Okhotsk region were studied and petrophysical maps were constructed to highlight the petrophysical features of tectonic elements of the territory. Petrophysical heterogeneities and anomalies of the respective geophysical fields were compared. The relationship between magnetic anomalies and subsurface rock complexes has been established only for the Mesozoic volcano-plutonic structures of the Okhotsk-Chukotka volcanic belt and partly for the Yudoma–Maya lithotectonic zone. In the ancient blocks of the Aldan–Stanovoy shield and the Uchur–Maya plate, the magnetic anomalies are mainly associated with activation of tectonic–magmatic processes and, to a lesser extent, with the magnetic properties of definite rocks. Inverse relationships have been established between the gravity anomalies and rock density anomalies within the regional gravity low (Tyrkan and South-Verkhoyansk gravity fields) and in the Vilyui syneclise, where gravity high corresponds to the low-density domains.
ISSN:1819-7140
1819-7159
DOI:10.1134/S1819714022040029