A Paleomagnetic Study of Sariolian Conglomerates of the Onega Structure of the Karelian Protocraton: The Problem of Global Paleoproterozoic Remagnetization


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Abstract

A paleomagnetic study of Sariolian (2.4–2.3 Ga) conglomerates of the Onega structure distinguished two characteristic magnetization components. The average direction of the mid-temperature magnetization component has a concentrated distribution and coincides with the direction of the Svecofennian remagnetization within the Karelian protocraton. The directions of high-temperature magnetization components distinguished in conglomerates show a wide scatter of values that is evidence of the primary origin of this magnetization component. Two clusters of high-temperature components associated not only with the protolith composition, but also with the different conditions of rock transformation, in particular their fluid saturation, are distinguished.

About the authors

N. V. Lubnina

Department of Geology

Author for correspondence.
Email: natalia.lubnina@gmail.com
Russian Federation, Moscow, 119234

N. A. Tarasov

Department of Geology

Author for correspondence.
Email: tarasovnik12@gmail.com
Russian Federation, Moscow, 119234

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