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year 7, Issue 23 (5-2023)                   Parseh J. Archaeol. Stud. 2023, 7(23): 61-86 | Back to browse issues page


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Pourmomeni S, Emami M, Niknami K. (2023). An Investigation on the Pottery Production in the Hormangan Site, Fars Province, Iran. Parseh J. Archaeol. Stud.. 7(23), 61-86. doi:10.30699/PJAS.7.23.61
URL: http://journal.richt.ir/mbp/article-1-346-en.html
1- M. A. in Archaeology, Department of Archaeology, Faculty of Literature and Humanities, University of Tehran, Tehran, Iran.
2- Associate Professor of the Department of Restoration of Historical and Cultural Monuments and Archaeology, Faculty of Conservation and Restoration, Isfahan University of Arts, Isfahan, Iran , m.emami@aui.ac.ir
3- Professor, Department of Archaeology, Faculty of Literature and Human Sciences, University of Tehran, Tehran, Iran.
Abstract:   (3170 Views)
Abstract
This study aims to recognize and characterize pottery production at the Hormangan site, a Neolithic settlement in the northeast of Fars province, Iran. An examination and analytical study of the potteries on this site was conducted to determine the manufacturing techniques of the Neolithic potteries, understand the raw materials and inclusions, the level of progress and knowledge of the potters from the final products, and the location of the production site. Excavating this site, ceramics and a heated structure, probably an open kiln, were found, belonging to the Mushki phase (6400-6000 BC). Thirty-six ceramic shreds were selected for thin-section petrography analysis according to their macroscopic features. After that, 18 of them were analysed using X-Ray Fluorescence (XRF) and X-Ray Diffraction methods. According to the mineralogical studies and the XRD and XRF analyses, while three different clay types were used to produce these Neolithic ceramics, they were all local productions. These vessels were fired in an open and unsophisticated kiln at an uncontrolled temperature, probably not over 800 degrees. Although the combination of these archaeometrical techniques indicates that there are various sub-angular inclusions in each type of clay, most of the pots are vegetally tempered (chaff-tempered). The existence of the heated structure separately from residential construction, a variety of designs and decorations on the ceramics, and various clay sources all determine that the Neolithic community of the Hormangan site has gone beyond a primitive rural society and as semiprofessional individuals had a surplus of more than their demands.
Keywords: Neolithic Period, Hormangan Site, Ceramic Production, Petrography, XRD, XRF.

Introduction
Hormangan site is a Neolithic site located on the border of the Bavanat River basin, in Jeshnian village, in the northeast of Fars province, Iran. This site was excavated in 2016, revealing two phases dated back to 6373 to 6000 BCE. The earlier phase indicates no traces of architectural structures, and the later phase contributed to the settlements. Moreover, a heated structure was discovered simultaneously with the later phase, surrounded by potteries and divided spaces. Pottery vessels which were discovered from these two phases are similar to the ceramics of Tall-e Mushki, Tall-e Jari B, Kushk-e-Hazar, Tall-e Bashi, and Rahmat Abad. As these types of potteries were first discovered from the Tall-e Mushki, they are known as Mushki phase potteries. The heated structure discovered in the Hormangan site is a unique structure related to producing pottery during the Mushki phase, which was probably an open fire kiln. Since there are no similar structures have been found in the Neolithic sites in the Fars region, this study aims to understand pottery manufacturing technology with multi-analytical approaches. Moreover, considering the two phases of the Hormangan site occupied by different settlers for almost 300 years, it is attempted to differentiate potteries of these two phases from a technological point of view.

Geological Setting
A portion of the Bavanat plain lies in the Sanandaj-Sirejan zone, as well as the Shahreza-Abade- Hambast orogenic belt, characterised by high-quality clay deposits and Devonian sandstones (Houshmandzadeh and Soheili, 1990). Several types of rocks can be found in the Bavanat region (Emami and Yaghmai, 2008), spanning three tectonic-stratigraphic units: Late Permian and Middle Triassic rocks, Late Triassic and Cretaceous rocks, and Tertiary rocks (Ghazi and Moazzen, 2015; Ghorbani, 2011). From the mineralogical point of view, this area includes kaolinite, illite, quartz, and chlorite, and secondary minerals are goethite, paragonite, and gypsum. Also, sandstones and shales have been eroded in most cases, creating debris slides. There is a large hydrographic network density in Tutat Mountain (formed by internal and metamorphic formation). However, there is a lower density of hydrographic network in the Kitaban, Khaleisht, and Khatban Mountains. The clays in this region are therefore expected to contain high levels of lime and quartz minerals, but it is also likely to contain metamorphic minerals (Khademi and Hashemi Nasab, 2011).

Materials and Methods
Hormangan ceramics were primarily divided into six groups based on surface treatment, colour, and decoration style. In further classification, the Hormangan potteries were categorised based on their form, size, place of motifs and ceramic fashioning techniques. After initial macroscopic studies of these ceramic vessels, 36 pottery sherds were selected for thin-section petrographic analysis. For choosing these samples, not only the former classifications were considered, but also it was attempted to select potteries from different phases and various contexts and trenches. The earlier phase includes 14 samples, the later phase 12 samples, and the heated structure 10 samples were selected for this analysis. 
For getting inside into the primary and secondary mineralisation phases, determining firing conditions and maximum temperature, and environmental burial conditions, 18 samples (from those 36 samples) have been selected for the X-Ray Diffraction analysis (XRD) in order to determine the crystalline phase constituents. This methods is necessary as a complementary method to petrography. Moreover, X-Ray Fluorescence analysis as a semi-quantitative analysis has been applied to these 18 samples to detect the chemical characterisation of their main and trace elements and to identify whether the earlier and later phases’ samples become clustered into two different groups or not. 

Discussion
The thin-section microscopic analysis indicated a very porous matrix with angular and semi-angular inclusions, which are mainly quartz, and with traces of vegetal tempers. Moreover, the vessels were fired under the oxidation condition. The inclusions were distributed randomly in the matrix, which suggested that they were not homogeneous and consisted of quartz, limestone, calcite, plagioclase (albite and sanidine), and igneous rock fragments, including muscovite, iron oxide, granite, magnetite, hematite, apatite, and feldspars. In most sherds, secondary calcite was formed, resulting in burial in a humid condition. The XRD analysis enabled us to observe some high-temperature minerals, such as gehlenite and diopside, in some samples. These minerals are usually presented in ceramics when fired at more than 800 degrees. On the other hand, the presence of the main elements MgO+CaO, Al2O3, and SiO2, detected by the XRF analysis and diagramed by the Noll system, indicated a very similar final product in terms of raw materials and inclusions. In addition, Cl, MnO, and SrO have been identified in these samples as trace elements, indicating the environmental conditions of the vessels after abandonment. 

Conclusion
In light of the microscopical observations and the phase and chemical analyses, it was determined that the Hormangan potteries could be divided into three main groups. The potteries of the earlier and later phases could not be distinguished from one another. These three groups are comparable to the region’s geological map, meaning all potteries are locally made. Except for four samples that were fired above 800 degrees, the others were fired at temperatures around 750 degrees. Samples from the earlier and later phases were distributed randomly among these clusters, comprising the Calcareous, Iron-rich, and Calcium-rich matrixes. The clay minerals were all extracted in the vicinity of the site, despite the fact that there were three different types of clay materials. Therefore, the potter(s) at the Hormangan site have chosen diverse clay sources but employed different techniques each time to produce similar results. It has also been noted that samples obtained from the heated structure have very similar characteristics to the ceramics produced in the later phase. According to the absolute dating results, the heated structure and the later phase are contemporaneous. However, in terms of potters’ technological behaviours, this could point to some standardization of ceramic production during this time.
Another question we have attempted to answer is whether the potter(s) added any aplastic materials, such as quartz, to their clay in order to increase its workability. Based upon an ethnoarchaeological study of the current pottery production in ShahReza (Pincé et al., 2019), approximately 230 kilometers away from the Hormangan site, it has been found that additional tempering does not need to be applied to the clay for the production of ceramics, owing to the rich clay sources in the ShahReza-Abade-Hambast orogenic belt (located in the Sanandaj-Sirjan zone). There is a possibility that the richness of clay sources in this region allowed potters to avoid tempering their raw materials during different periods, which will be investigated in more detail in future studies.   

Acknowledgements
Dr Morteza Khanipour has generously allowed access to the Hormangan site’s ceramics for this study, and the authors are very grateful for his generosity.
Full-Text [PDF 1727 kb]   (636 Downloads)    
Type of Study: Research | Subject: Interdisciplinary
Received: 2020/05/23 | Accepted: 2020/10/16 | Published: 2023/05/22

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