Abstract
Identification of resources and quarries used for extraction of raw materials in the ancient time is a very interesting subject matter for researchers and archaeologists. Results of analysis and study of ancient mines and quarries may lead to characterize the know- how of ancient technology of production of materials and tools in the old world and shows the techniques rendered by artists and craftsmen to apply raw materials for producing different artistic and ordinary objects. Moreover, identification of ancient mines and quarries (especially stone quarries) provide unaltered materials for conservators to reconstruct archaeological and historical stone monuments. In this paper, stone blocks used in Anahita Temple in Kangavar and ancient stone quarry of Chel Maran (Chehel Maran) were studied by analytical methods. The aim of this study is to determine chemical composition and microstructure of stones used in the Anahita Temple and their correlation with the stone mining evidences observed in the Chel Maran quarry. For this purpose, some samples from the temple and the quarry were analyzed by X-ray fluorescence and polarized optical microscopy methods. The results indicated that the stones used in the temple and those of the quarry are limestones and Si and Mg were identified in the analysed samples as minor constituents. Microscopic structure of samples presented calcite as the main phase including some dolomite crystals and clay minerals as impurities. Based on the results obtained, the Chel Maran ancient stone quarry was widely used for the construction of the Anahita Temple. 
Keywords: Ancient Mining, Anahita Temple of Kangavar, Chel Maran Quarry, Limestone, Calcite.

Introduction
Stone has been used widely during the ancient time to make different artefacts and monuments including small ritual and decorative objects, reliefs, decorative monuments and buildings. The studies on quarrying and manufacturing of stone objects as well as the provenance of raw materials are an interesting subject in geoarchaeological and archaeometric investigations (Goldberg et al, 2006), and this is a useful study when restoration interventions are required. 
The large archaeological complex of Anahita Temple is located in western Iran, in the city of Kangavar and based on the archaeological excavations and findings, it was dated from the Achaemenid to the Sasanian periods (Azarnoush, 1981; Kambakhsh Fard, 1994). It was constructed on a natural hill and it was erected by stone and gypsum mortars. The main building was built with large stone blocks including cubic blocks for walls and very large and thick circular columns. There are some evidences of stone quarrying in different areas near the Anahita Temple. The main and important stone quarry in this region is Chel Maran (Chehel Maran) stone quarry located in the west of the Temple in a mountain with the same name (Chel Maran mount) (Oudbashi, 2008). The aim of this paper is to analyse the stones from Anahita Temple and the Chel Maran quarry in order to compare their chemical and microstructural features and to find a possible relationship between the building and the quarry. 

Methods
Five fragments from the Anahita Temple and two big samples from the Chel Maran quarry were selected. Ten grams of each sample was powdered for chemical analysis. A thin section was prepared from each sample for microscopic studies. The chemical composition of samples was characterized by X-ray Fluorescence (XRF) analysis by using a S4 Pioneer model X-ray fluorescence spectrometer manufactured by Bruker. Microscopic observation of fragments and stones were done on thin sections by using a Primotech model Zeiss polarized optical microscope. Thin sections were studied by alizarin-red method to identify presence of dolomite in the texture of stone samples (Flügel et al., 2010)

Findings and Argument
The results of XRF analysis of the stone samples are presented in Table 1. The results show that all samples are calcarous stones as can be deduced by the high amount of CaO and the loss on ignition (LOI). Furthermore, SiO2, MgO and Al2O3 were detected as minor constituents in the composition of the stone samples. Other elements were detected as minor/trace content in the compsoition of samples. Although, the stones shows variable amounts of some constituents such as Na2O or Al2O3 , it is visible that the chemical compsoiton of stone samples of the Temple and the quarry is quite similar. 
The pertographic study showed a layerad texture of micrite to sparite in all samples. There were many veins of secondary calcite in the texture of the samples. Alizarine-red test indicated the presence of sporadic dolomite crystals in the texture of the stone samples. Furthermore, some compact clay veins were visible with dark colors in the microstructure of the samples (Bausch, 1968). The compariosn of the petrographic micrographs of samples from the Anahita Temple and the Chel Maran quarry reveals that they are very similar from textural point of view, in particular, sample CM-2 that was taken from the western part of the Chel Maran mount, where many evidences of quarrying and stone extraction are visible in that area.

Conclusion
The results of chemical and petrographic analysis of the stone samples from the Anahita Temple of Kangavar and the Chel Maran stone quarry showed that the Chel Maran stone quarry was used as a main resource to provide stone blocks for the construction of the Anahita Temple. The analysis indicated that the stone samples can be classified as limestone with some impurities such as SiO2, Al2O3 and MgO that are due to presence of clay minerals and dolomite in the structure of both the stone of the Temple and the quarry. The petrographic studies also showed a micrite to sparite texture with evidences of clay veins and small amounts of dolomite spread in the texture of the stones. The results obtained proved the similarity of the chemistry and the texture of samples from Anahita Temple and the quarry which indicate that the ancient quarry of Chel Maran was one of the source of the stones used in the historic monument of Anahita Temple.

Abstract
The slag sites under study are located in Khatam County, Yazd Province. In the archaeological surveys of Khatam County in 1400 AH, twelve metal smelting sites were identified through abundant metallic slag, and each of these sites was sampled. Petrographic analysis revealed that the predominant slag is iron, with only one instance of copper slag. The sites where metal smelting occurred, attributed to historical and Islamic periods based on pottery, exhibited evidence of iron smelting and its compounds in eleven samples. These samples contain metallic minerals such as wustite, marcasite, hematite, and magnetite. Marcasite and wustite minerals are related to smelting furnace processes and are products of mineral substances. It appears that in some mines in the region, magnetite and hematite are the predominant minerals, while in others, hematite is the predominant mineral, with a smaller amount of magnetite, which is evident in these primary minerals within the slag. Another sample related to copper slag exhibited small vesicular structures and limited copper ore minerals (chalcopyrite, digenite, and metallic copper) within the slag matrix. Alongside these primary minerals, there is a flow-like green glassy component indicating high furnace heat. The analytical results show that the MgO content in the samples is less than the amount of lime. Therefore, the limestone in this area is mainly ordinary limestone and not dolomite. Chemical analysis revealed that metal workers in this area were more successful at producing sponge iron.
Keywords: Archaeological Survey, Slag, Iron, Ancient Mining, Khatam.

Introduction
Iran has long been recognized as a center for mining and metal smelting. Archaeological evidence indicates that northern and central Iran are among the oldest centers of metallurgy in the world. The presence of rich mineral reserves in Iran, among other factors, has influenced the growth of mining and metalworking in this region (Momenzadeh, 2005). Due to the existence of various metal ores and advanced cultures in Iran, this area can be identified as one of the main hubs of technological innovation in the field of ancient mining and metalworking. Khatam County, located in the southern part of Yazd Province, holds particular significance in the realm of iron slag. One of the earliest efforts to produce steel worldwide took place in this region (Alipour et al., 2021). Considering the evidence of steel production in this area, it is essential (Alipour, 2017) to understand the role Khatam played in iron production during the Islamic and Sassanian periods. To investigate this matter, 12 sites in Khatam County were selected for studying iron slag. The main objective of this research includes petrographic and geochemical analysis of the slag to identify the type of extracted metal(s) and the extraction process and production of metal(s) at these sites. Additionally, the provision of necessary minerals for mining in this area is also under scrutiny. Historical and field research methods were employed for this study, involving the collection of data and archaeological investigations; field studies, such as topographic mapping, photography, identification of sites and metal smelting furnaces; and examination of samples using polarizing microscopes and XRF devices. This research has addressed primary inquiries related to the type of metals in slag, the mining process, and metal production at Khatam’s iron slag sites. Overall, Khatam County held significant importance in the production of metals during ancient and Islamic times. This region is recognized as one of the ancient mining and metalworking centers, and further research into the history and mining processes in this area could provide additional insights into the history of metalworking in Iran.

Discussion
Based on XRF chemical analyses of the slag, the results indicate that the majority of the mineral content in these slags consists of iron ore, with only one case showing the presence of copper. The CaO concentrations in these slags range from 3.59 to 28.41%, and an increase in CaO leads to the production of calcium-rich olivine. The type of slag (flow, permeable, massive, or furnace bottom) significantly impacts the results of chemical analysis and the ratio of oxides of the main elements (metallic oxides and silica). Additionally, the high amount of CaO facilitates the formation of a calcium-rich silicate phase. Petrographic microscopy studies confirm these findings, revealing observable olivine phases and primary silicate phases with metallic iron minerals such as magnetite and hematite. Due to the silica content, the addition of limestone to the smelting process increases the amount of duplex iron (Fe3O4). Consequently, silica stabilizes triplex iron oxide (hematite), while limestone stabilizes spinel iron oxide (magnetite). Moreover, microscopic examinations primarily reveal metallic minerals such as magnetite and metallic iron. Furthermore, sponge iron, like many other ancient civilizations in the region under study, was produced. The production of this type of iron requires less technical knowledge than other types of iron (Abbasnejad, 2009).
Surveying the region revealed that plants such as pistachios and wild almond produce high-quality charcoal. Since blacksmiths have no idea about using additional limestone in the furnace, the smelted slags were highly adhesive, leading to significant iron loss. The use of limestone in iron removal creates slags with fine properties that are easily separated from the iron (Abbasnejad, 2009). A good slag resulting from smelting should contain 30 to 40% limestone. Tests conducted on iron ore in this region show limestone percentages ranging from 3.59 to 28.41%. The slag analysis results also indicate a small amount of limestone, averaging approximately 11.38%. The deficiency of these two elements in slag, as they play crucial roles in reducing smelting heat and separating iron from slag, can indicate high iron levels and the inadequacy of slag (adhesiveness, viscosity, high density), resulting in low-quality sponge iron. The percentage of Fe2O3 ranges from 23.20 to 74.25%, and the percentage of Al2O3 ranges from 0.003 to 0.94%. The percentage of MgO in the tested slags is less than 0.003%. According to the mineral analysis, the most important iron minerals in this region include hematite (Fe2O3) and magnetite (Fe3O4). Due to technical flaws in these furnaces, sponge iron contains impurities such as silica, phosphorus, aluminum oxide, manganese oxide, and other metallic oxides, as confirmed by various tests conducted on ore and slag.

Conclusion
Eleven samples from the metal smelting site showed evidence of iron smelting and its compounds. In these samples, metallic ores such as wustite, marcasite, hematite, and magnetite are observed. Marcasite and wustite ores are related to smelting furnace processes and are mineral byproducts. It seems that in some mines in the region, magnetite and hematite are predominant, while in others, hematite is less prevalent, and magnetite dominates. Additionally, in the sample related to copper smelting slag, small and limited vesicles of copper ores (covellite, digenite, and metallic copper) are observed alongside a part of the green glassy matrix, indicating high furnace heat. This primary mineral evidence is observed in the slags. Considering the changes in the calcium oxide (CaO) concentration, it can be inferred that this substance was added during smelting operations to aid in smelting and reduce the temperature of the furnace materials. The microscopic results of some slags reveal primary minerals, mostly hematite and magnetite metallic ores, indicating a magmatic origin for the utilized minerals. The percentages of silica (SiO2), magnesium, and aluminum in these slags are relatively low. Analyses of these slags and iron stones from this region show that a deficiency of CaO and SiO2 leads to iron loss in the slag while increasing the iron content within it.
Based on this research, it is likely that iron ore was extracted from mines near the site and was subsequently transported to this location. Given the presence of iron mines at distances of 8, 10, and 15 kilometers from these sites, these mines are likely the source of these slags. Regarding the archaeology of the region, historical references indicate that the area held significance and prominence in various historical periods, particularly during historical and Islamic eras. However, due to insufficient information about the archaeology of the region and the lack of precise dating of these sites, accurate dating of these sites is unfeasible.