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Aliyari A. (2025). Local Innovation and Craftsmanship: Technological Analysis (Petrography, XRD, XRF) of Late Chalcolithic Pottery from Tepe Ghabrestan, Qazvin Plain. Parseh J. Archaeol. Stud.. 9(33), 29-49. doi:10.61882/PJAS.883.1189
URL: http://journal.richt.ir/mbp/article-1-1189-en.html

From the perspective of pottery production during the Chalcolithic period at Tepe Ghabrestan (ca. 4200–3100 BCE), the Qazvin Plain constitutes one of the most important archaeological sites in the north central Iranian Plateau. This study was conducted with the aim of identifying the technology of pottery manufacture and the mineral compositions present in the ceramics. The research is significant for sourcing the provenance of Ghabrestan pottery and assessing the level of craftsmanship among its producers. The central research question concerns the quality of production and whether the pottery was locally made or imported. In this study, twenty pottery sherds from excavations at Tepe Ghabrestan selected from the ceramic repository of the Institute of Archaeology, University of Tehran were analyzed using physical tests (porosity measurement, water absorption, and density), petrography, X ray diffraction (XRD), and X ray fluorescence spectrometry (XRF), to perform elemental analysis and investigate the technological processes of pottery manufacture in the Qazvin Plain during the fourth millennium BCE. The results indicate the use of advanced and specialized production technology, reflecting the potters’ skill in controlling the firing process and selecting high quality raw materials. Petrographic examination of thin sections confirmed the presence of minerals characteristic of the region, including quartz, biotite, calcite, and augite. A major finding was evidence of the use of high speed potter’s wheels in producing Ghabrestan pottery, as shown by the uniform wall thickness and smooth surface finishes. Microscopic analysis confirmed the presence of inorganic tempers (mineral additives) incorporated to enhance mechanical properties and reduce cracking during firing. The clay used matches the geological composition of the Qazvin Plain, indicating local production of the pottery.