Structural controls on rare-metal mineralization: Depth-specific mapping of economic deposits in Nigeria Basement Complex

Э.  Абрахам; M.  Абду́льфарадж; M.  Эметере; A.  Усман; И.  Икеазота

doi:10.51301/ejsu.2025.i6.04

Авторы

Э. Абрахам Федеральный университет Алекса Эквуэме, Нигерия
M. Абду́льфарадж Университет Абдулазиза, Саудовская Аравия
M. Эметере Университет Боуэн, Нигерия
A. Усман Федеральный университет Алекса Эквуэме, Нигерия
И. Икеазота Федеральный университет Алекса Эквуэме, Нигерия

DOI:

https://doi.org/10.51301/ejsu.2025.i6.04

Ключевые слова:

магнитные данные, разведка полезных ископаемых, глубины, структурный контроль, горное дело, кристаллический фундамент

Аннотация

Цель данного исследования заключается в выявлении перспективных зон для минералого-разведочных работ и углублении понимания процессов минерализации в пределах докембрийских террейнов. Высокоточные аэромагнитные данные были проанализированы с использованием комплекса интегрированных геофизических методов, включая аналитический сигнал, наклонное производное поле, фазовую симметрию, изображение параметров источников, полосовую фильтрацию Баттерворта, трёхмерную инверсию магнитных аномалий и деконволюцию Эйлера. Эти методы позволили выделить подповерхностные структуры, определить их пространственное распределение, глубины залегания и взаимосвязь с проявлениями полезных ископаемых. Результаты показали наличие линейных зон северо-восточного и северо-западного простираний, соответствующих главным зонам сдвига и разломным системам, контролирующим внедрение минерального вещества. Неглубокие источники (250-500 м) связаны с промышленными минералами, такими как глина; промежуточные глубины (500-720 м) с редкометалльными пегматитами, содержащими колумбит-танталит и вольфрамит; тогда как глубинные структуры (>1200 м) указывают на потенциальные области зарождения минерализующих флюидов. Высокоамплитудные аномалии аналитического сигнала (0.04-0.05 нТ/м) совпадают с геологическими контактами и структурными границами, обозначая зоны возможной минерализации. Данное исследование представляет собой первую комплексную работу, направленную на изучение подповерхностных минерализованных структур региона. Применение комплекса геофизических методов позволило выявить ранее неотражённые структурные особенности и подтвердить вертикальную непрерывность минерализованных зон. Полученные результаты обеспечивают глубинно-ориентированное картирование экономически значимых месторождений, предоставляя ценные сведения для целенаправленных геологоразведочных работ и способствуя разработке более точных и экономически эффективных стратегий поисков колумбит-танталита, вольфрамита, каолина и других промышленных минералов в пределах кристаллического фундамента.

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