DefinePK

Abstract

Rupat Island is a part of Bengkalis district, Riau province, Indonesia with the total area is 1,500 km2. The main formations in this island are Older Surface Sediment (Qp) and Recent Surface Sediment (Qh) with the recent age of both. Silica sand distributes only on the northern coastline of Rupat Island from Tanjung Mumbul until Pasir Putih area. Samples were collected and measured from five locations, which are Beting Aceh (BA) Tanjung Api (TAp), Teluk Rhu (TRh), Tanjung Punai (TPn) and Tanjung Lapin (TLp). From these locations, homogeneous characteristic of silica sand can be found as a white color. Silica sand source on Rupat Island came from sediment that carried by the sea-flow of Malacca Strait as the sediment transport agent, it was shown by the characteristic of the grain which is the round-shape and same size that were conducted by using microscopic photograph testing. Laboratory tests using the XRF (X-Ray Fluorescence) and XRD (X-Ray Diffraction) showed the silica compound (SiO2) has a high percentage above 95%.