Characterization and identification of clay-material provenance from Bayat ceramic home industry in Klaten, Central Java, Indonesia

Bayat Ceramic Home Industry in Klaten, Central Java, Indonesia is produced from three primary locations of Melikan, Paseban, and Ndolon. The clay-sources of the ceramic were mined from Bayat and surrounding areas, which is geologically named Jiwo Hills. Characterization and identification of clay material sources of the ceramic products from these areas were done in to understand the correlation between provenance and production processes. This paper presents the first contribution on Bayat ceramic by investigating the mineralogical composition using petrography and X-Ray Diffraction (XRD) analyses. Understanding the characteristics and compositions of clay material source of ceramic in Bayat can be used to determine other clay source locations or quarry that have the similar characteristics to current clay-materials. The clay minerals of ceramic products from Melikan and Paseban are halloysite, smectite, and kaolinite, while from Ndolon are smectite and kaolinite. Monoand poly-crystalline quartz with the lithic fragments of phyllites were found in Melikan and Paseban ceramics. Ceramic from Ndolon is rich in plagioclase and lithic andesite. Clay provenance of ceramic products from Melikan and Paseban might be derived from weathered low-grade metamorphic and igneous rocks from West Jiwo Hills. While from Ndolon might be derived from weathered igneous or volcanic rocks from Kebo-Butak Formation. The amorphous silica found in the ceramic from Melikan, Paseban, and Ndolon suggests the firing process between 700–800 °C. Thus, our results provide the database of clay source characteristics to determine the following possible clay-quarry location for the raw materials of ceramic products in this location.