Paleomagnetism of early paleozoic geological complexes of Mongolia

Most of the studied Early Phanerozoic rocks of West Mongolia have undergone repeated remagnetization. Secondary magnetization components with normal and reversed polarity are isolated. The magnetization components with normal polarity are associated with the Mesozoic remagnetization of the rocks. Th...

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Bibliographic Details
Published in:Izvestiya. Physics of the solid earth 2017-05, Vol.53 (3), p.410-428
Main Author: Kovalenko, D. V.
Format: Article
Language:English
Subjects:
Carboniferous
Components
Deformation
Earth and Environmental Science
Earth Sciences
Geology
Geophysics/Geodesy
Identification
Magnetism
Magnetization
Mesozoic
Ordovician
Palaeomagnetism
Paleolatitude
Paleomagnetism
Paleozoic
Permian
Phanerozoic
Polarity
Rock
Rocks
Zonation
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Summary:Most of the studied Early Phanerozoic rocks of West Mongolia have undergone repeated remagnetization. Secondary magnetization components with normal and reversed polarity are isolated. The magnetization components with normal polarity are associated with the Mesozoic remagnetization of the rocks. The components with reversed polarity were probably formed during the Carboniferous–Permian superchron of reversed polarity. The analysis of the distribution of the reversed-polarity magnetization component in the structure of Mongolia permits some zonation. Within Mongolia, the regions with insignificant post- Permian deformations and complicated post-Permian deformations are identified; also the area of rotations of large geological blocks about the horizontal axis (Khan-Khukhei Ridge) is distinguished. It is hypothesized that in the Ordovician rocks of West Mongolia, the magnetization component that is close to primary was identified. If this is the case, the paleolatitude calculated from this magnetization direction corresponds to the interval 14°–17°–20° (minimal–mean–maximal) of probably northern latitude
ISSN:1069-3513
1555-6506
DOI:10.1134/S1069351317020070