T The research area is located in the Air Upas bauxite site mine owned by PT. Harita Prima Abadi Mineral in Ketapang District, West Kalimantan Province. This area has natural resource potential in the form of interesting laterite bauxite deposits to study. Research covers geological aspects, such as surface lithology research and geomorphological research. In general, the profile is divided into 3 namely overburden, bauxite laterite layer, and kong. For modeling, the software used is Surpac6.3.2 and the data used are overburden thickness profile data, thickness data of laterite bauxite deposits in each testpit, coordinates of testpit points and data on the chemical content of bauxite. Modeling is done using a 3D model and zoned based on its chemistry. And it is calculated using estimated reserves to know the reserves according to their chemical quantity.