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Preliminary Results of Magnetic Mineral Identification of sand deposits in the Northern Coast of Manokwari, West Papua by Rock Magnetism (a) Department of Physics, University of Papua, Manokwari 98314, Indonesia Abstract Magnetic minerals contained in iron sand deposits are widespread natural resources in the territory of Indonesia and their management into high value mineral resources has been conducted in most areas. However, there are still areas that have not been well inventoried of the data of potential, reserves, and management of the iron sand mineral resources. Sand deposits in the northern coast of Manokwari, West Papua has a gray to blackish color and potentially contained iron sand but its existence is still used only as a building material. This research is a preliminary study focusing on identifying magnetic mineral as an indicator of magnetic mineral potential in samples from Kaironi, Warbefor, and Amban. The identifications using the rock magnetism technique are done by determining distributions of grain size, magnetic degree, density, magnetic susceptibility, and also SEM and EDS testing. The results showed that the distribution of grain size varies from very fine ( less than 0.044 mm) to very coarse (more than 1 mm). Sand sample with the magnetic degree above 30% is from Amban 2. This sample has about 5.00 g/cm3 of density, the magnetic susceptibility reaches 112.863 cm3/kg and the highest percentage of Fe element is 35.39%. Further research on that site should be undertaken to obtain the magnetic mineral distribution data located along the coast in a better management effort. Keywords: magnetic mineral, grain size, magnetic degree, density, magnetic susceptibility, SEM, EDS, Northen Coast of Manokwari, West Papua Topic: Physics |
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