Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 110340 10.2205/2025ES001099 wuqekc ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ UAV Aeromagnetic Survey of the Valimyaki Complex (Northern Ladoga Area): First Estimates of the Buried Intrusion Structure UAV Aeromagnetic Survey of the Valimyaki Complex (Northern Ladoga Area): First Estimates of the Buried Intrusion Structure https://orcid.org/0009-0004-5862-7428 Таран Я. В. Taran Ya. V. https://orcid.org/0000-0001-7489-2951 Алёшин Игорь Михайлович Aleshin Igor Mikhaylovich ima@ifz.ru https://orcid.org/0000-0003-1837-0918 Большаков Е. М. Bolshakov E. M. https://orcid.org/0000-0002-5788-6944 Соколова Елена Юрьевна Sokolova Elena Yurievna https://orcid.org/0000-0001-7435-5216 Тихоцкий Сергей Андреевич Tikhotskiy S. A. Институт физики Земли им. О.Ю. Шмидта Российской академии наук Moscow Россия Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences Moscow Russian Federation Геофизический центр РАН Москва Россия Geophysical Center of the Russian Academy of Sciences Moscow Russian Federation Всероссийский научно-исследовательский геологический институт нефти Moscow RU All-Russian Research Geological Oil Institute Moscow RU Всероссийский нефтяной научно-исследовательский геологоразведочный институт Россия All-Russian Research Geological Oil Institute Russian Federation Институт физики Земли им. О.Ю. Шмидта РАН Россия Schmidt Institute of Physics of the Earth of RAS Russian Federation 30 12 2025 30 12 2025 25 6 ES6017 09 09 2025 19 10 2025 https://rjes.ru/en/nauka/article/110340/view

The Valimyaki intrusive complex is an early-orogenic gabbroid body of the Northern Ladoga region, composed predominantly of pyroxenites, gabbros, and diorites and historically known for titanium-magnetite mineralization concentrated in its near-surface marginal zones. At present, no reliable three-dimensional model of the Valimyaki massif exists, and its investigation is significantly constrained by difficult terrain accessibility. Multi-altitude UAV-based aeromagnetic surveying provides new opportunities for obtaining information on the deep structure of the intrusive complex. In 2023–2025, a series of surveys was carried out over the Valimyaki massif and Mäkisalo Island, the two main known surface expressions of the Valimyaki complex. As a result, maps of the anomalous magnetic field were obtained at several flight altitudes, enabling direct calculation of the vertical magnetic field gradient. The multi-level dataset considerably expanded the interpretational potential and the application of various field transformation and inversion techniques, including the equivalent-source method. Integrated analysis of the aeromagnetic data using spectral and mounting inversion methods yielded a consistent model of both deep-seated and near-surface magnetic sources, refining the internal structure and spatial extent of the Valimyaki massif.

The Valimyaki intrusive complex is an early-orogenic gabbroid body of the Northern Ladoga region, composed predominantly of pyroxenites, gabbros, and diorites and historically known for titanium-magnetite mineralization concentrated in its near-surface marginal zones. At present, no reliable three-dimensional model of the Valimyaki massif exists, and its investigation is significantly constrained by difficult terrain accessibility. Multi-altitude UAV-based aeromagnetic surveying provides new opportunities for obtaining information on the deep structure of the intrusive complex. In 2023–2025, a series of surveys was carried out over the Valimyaki massif and Mäkisalo Island, the two main known surface expressions of the Valimyaki complex. As a result, maps of the anomalous magnetic field were obtained at several flight altitudes, enabling direct calculation of the vertical magnetic field gradient. The multi-level dataset considerably expanded the interpretational potential and the application of various field transformation and inversion techniques, including the equivalent-source method. Integrated analysis of the aeromagnetic data using spectral and mounting inversion methods yielded a consistent model of both deep-seated and near-surface magnetic sources, refining the internal structure and spatial extent of the Valimyaki massif.

 Valimyaki Mäkisalo Island Raakhe-Ladoga zone UAV aeromagnetic surveying multialtitude aeromagnetic surveying Valimyaki Mäkisalo Island Raakhe-Ladoga zone UAV aeromagnetic surveying multialtitude aeromagnetic surveying The authors are grateful to the colleagues from IPE RAS who took part in the UAV survey of the Valimyaki intrusive complex as well as colleagues from VNIGNI developing the GIS INTEGRO software. The study was fulfilled under the State Assignments of IPE RAS, GC RAS and VNIGNI RAS. The authors are grateful to the colleagues from IPE RAS who took part in the UAV survey of the Valimyaki intrusive complex as well as colleagues from VNIGNI developing the GIS INTEGRO software. The study was fulfilled under the State Assignments of IPE RAS, GC RAS and VNIGNI RAS.

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