Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 90257 10.2205/2025ES000964 nuvkqi Спецвыпуск: "Наука о данных, геоинформатика и системный анализ в изучении Земли" Special Issue: “Data Science, Geoinformatics and Systems Analysis in Geosciences” Спецвыпуск: "Наука о данных, геоинформатика и системный анализ в изучении Земли" Curie Point Depths of the Amur Tectonic Plate Curie Point Depths of the Amur Tectonic Plate https://orcid.org/0000-0003-4249-3985 Диденко Алексей Николаевич Didenko Alexey Nikolaevich

доктор геолого-минералогических наук;

doctor of geological and mineralogical sciences;

 https://orcid.org/0000-0001-7516-6089 Носырев Михаил Ю. Nosyrev Mikhail Yu. https://orcid.org/0000-0003-1382-9742 Гильманова Гульшат З. Gilmanova Gulshat Z. Геологический институт РАН Moscow Россия Geological Institute of the Russian Academy of Sciences Moscow Russian Federation Институт тектоники и геофизики им. Ю.А. Косыгина ДВО РАН Россия Institute of Tectonics & Geophysics FEB RAS Russian Federation Институт тектоники и геофизики им. Ю.А. Косыгина ДВО РАН Россия Institute of Tectonics & Geophysics FEB RAS Russian Federation Институт тектоники и геофизики им. Ю.А. Косыгина ДВО РАН Россия Institute of Tectonics & Geophysics FEB RAS Russian Federation 23 05 2025 23 05 2025 25 2 1 7 15 11 2024 15 04 2025 https://rjes.ru/en/nauka/article/90257/view

Based on the analysis of the anomaly magnetic field for the Amur Plate and adjacent territories, a Curie Point Depth (CPD) map has been constructed, which we identify with the isotherm 578°C — the temperature of the Curie point of magnetite. Within the Amur plate, the CPD values range from 13.4 to 38.0 km. Three large areas are clearly visible on the map: 1) NE-trending zone with CPD values of 25–20 km — Yellow Sea-Korean Peninsula-Sea of Japan; 2) ENE-trending central zone with CPD values of 30–38 km. Large depth values are due to the presence of the late Paleozoic and Mesozoic sedimentary basins of Erlyan, Songliao and Sredneamursky; 3) ENE-trending central zone with CPD values of 30-38 km. Large depth values are due to the presence of the late Paleozoic and Mesozoic sedimentary basins of Erlyan, Songliao and Sredneamursky. The fourth area of decrease in CPD values spatially coincides with volcanic structures of Pliocene-Pleistocene age in the area of the Toko Stanovik. Comparison of the generated CPD map with the Amur plate boundaries determined mainly from seismic data shows that the surface boundaries of the plate coincide mainly with the zones of the largest gradients of the 578°C isotherm distribution in depth.

Based on the analysis of the anomaly magnetic field for the Amur Plate and adjacent territories, a Curie Point Depth (CPD) map has been constructed, which we identify with the isotherm 578°C — the temperature of the Curie point of magnetite. Within the Amur plate, the CPD values range from 13.4 to 38.0 km. Three large areas are clearly visible on the map: 1) NE-trending zone with CPD values of 25–20 km — Yellow Sea-Korean Peninsula-Sea of Japan; 2) ENE-trending central zone with CPD values of 30–38 km. Large depth values are due to the presence of the late Paleozoic and Mesozoic sedimentary basins of Erlyan, Songliao and Sredneamursky; 3) ENE-trending central zone with CPD values of 30-38 km. Large depth values are due to the presence of the late Paleozoic and Mesozoic sedimentary basins of Erlyan, Songliao and Sredneamursky. The fourth area of decrease in CPD values spatially coincides with volcanic structures of Pliocene-Pleistocene age in the area of the Toko Stanovik. Comparison of the generated CPD map with the Amur plate boundaries determined mainly from seismic data shows that the surface boundaries of the plate coincide mainly with the zones of the largest gradients of the 578°C isotherm distribution in depth.

 Amur plate anomaly magnetic field spectral analysis Curie point depth Amur plate anomaly magnetic field spectral analysis Curie point depth The authors express their gratitude to the anonymous reviewer of the manuscript, most of whose comments were taken into account when preparing the final version of the work. The study was supported by the Russian Science Foundation Grant (Project No. 25-17-68001 (extended from No. 22-17-00023)). Basic funding came through the implementation of state assignments of the Geological Institute of the Russian Academy of Sciences (research topic No. FMMG-2023-0010) and the Institute of Tectonics and Geophysics, Far Eastern Branch, Russian Academy of Sciences (research topics No. 121021000095-1). The authors express their gratitude to the anonymous reviewer of the manuscript, most of whose comments were taken into account when preparing the final version of the work. The study was supported by the Russian Science Foundation Grant (Project No. 25-17-68001 (extended from No. 22-17-00023)). Basic funding came through the implementation of state assignments of the Geological Institute of the Russian Academy of Sciences (research topic No. FMMG-2023-0010) and the Institute of Tectonics and Geophysics, Far Eastern Branch, Russian Academy of Sciences (research topics No. 121021000095-1).

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