Analysis of oxide content in sand and rock found in public mining of west sumatra province using XRF test

Abstract

Indonesia is regionally located on two large plates, which are the Pacific plate in the north and the Australian plate in the south. Due to the geological activity of these two plates, it results in a complex tectonic pattern supporting the formation of mineralization. Therefore, Indonesia is considered as a country rich in various minerals and oxide sources. The purpose of this study is as a preliminary study to analyze the element of atom / oxide contained in rocks and sand found in public mining of West Sumatra Province. The initial identification done is to perform X-ray fluorescence test (XRF) on rock samples taken from Jorong Bukit Harapan Darmasraya Regency and Manggani, 50 Kota Regency. The sand samples are taken from Kupitan area Sijunjung Regency, Pinti Kayu Gadang Muara Labuh and jorong pulai Sitiung Darmasraya regency. XRF test results for rock and sand samples from these five areas indicate the presence of six dominant oxides with large percentage i.e. Al2O3, SiO2, P2O5, CaO, TiO2, Fe2O3 oxides. The content of SiO2, Al2O3, Fe2O3, CaO, TiO2, and P2O5 foundon rock samples is quite high 53.01-57.77%, 29.982-32.191%; 5.113-10.302%; 2.119-2.367%; 0.9021.809%, and 0.685-0.968% respectively. Meanwhile, the sand samples indicate the content of SiO2, Al2O3, Fe2O3, CaO, TiO2, and P2O5 15.103-52.652%; 5.379-17.621%; 9.22-58.593%; 1.54-9.22%; 0.702-12.238% and 1.261-2.545% respectively.