Abstract
X-ray powder diffraction (XRD) is widely used for geological analysis of sediment samples. In this study a method for detecting sources of sedimentation using mineral composition obtained by the qualitative phase of XRD is proposed. Possible minerals matching resulted from the Hanawalt's searchmatch method were arranged into binary matrix of mineral composition of each sampling site. Hierarchical cluster analysis was grouped samples into clusters based on mineral similarity and yielded a dendrogram. Using information of sample's environment, the meaning of dendrogram was derived for sediment fingerprinting.
The result showed that sedimentation sources in the Sengguruh reservoir mainly come from 10-30° slope of the Lesti basin and cultivated area downstream of the Brantas origin. Comparing with the field observation and satellite data, a good correlation was obtained.
