ABSTRAK Telah dilakukan penelitian tentang Identifikasi sebaran pasir besi di pesisir pantai benteng Lubok Desa Lamreh, Aceh Besar dengan menggunakan metode Very Low Frekuensi berbasis Resistivity mode (VLF-R). Penelitian ini bertujuan untuk: (1) Memprediksi struktur bawah permukaan pasir besi 2D bedasarkan resistivitas pasir besi bedasarkan data VLF. (2) Melakukan interpretasi 2D struktur bawah permukaan pasir besi. Data VLF-R diukur pada 3 lintasan, dengan panjang lintasan pertama adalah 250 meter dan lintasan ke-2 120 meter dan lintasan ke-3 100 meter. Pemodelan 2D data VLF-R dilakukan dengan menggunakan program inversi elektromagnetik 2LAYINV (Pirttijärvi, 2006). Proses inversi menunjukan 2 zona konduktivitas pasir besi, dimana lapisan resistif pada kedalaman ditutupi oleh lapisan konduktif di atasnya. Lapisan konduktif tersebut diduga sebagai lempung yang kaya akan kandungan pasir besi dengan nilai resistivitas 10 – 100 Ωm Kata Kunci: Resistivitas pasir besi, Very Low Frequency (VLF), Lamreh ABSTRACT This research was conducted about 2D Sub-Surface Identification of iron sands in lamreh, Aceh Besar, by using Very Low Frequency method based on Resistivity mode (VLF-R). The aims of the research; (1) Predicting 2D sub-surface of iron sands resistivity in Lamreh based on VLF data. (2) Conducting 2D sub-surface identification measurement data of iron sands. VLF data were measured into 3 lines, by the first line was 250 meters and the second line was 120 meters and the third lines was 100 meters. 2D modelling in VLF-R was conducted by using 2LAYINV electromagnetic inversion program (Pirttijärvi, 2006). Inversion process showed 2-iron sands-conductivity-zone, where the resistive layer in depth was covered by conductive layer on it. The conductive layer was expected as clay being rich of water content by resistivity rate at 10 – 100 Ωm. Resistive layer was expected as cap rock by resistivity rate at 20000 – 40000 Ωm. Keywords: Iron sands resistivity, Very Low Frequency (VLF), Lamreh