Primary Research on the Bronze Technology of Lower Xiajiadian Culture in Northeastern China Chenyuan Li1*, Yanxiang Li1, Lixin Wang2, Kunlong Chen1 and Siran Liu1
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Li et al. Herit Sci (2019) 7:75 https://doi.org/10.1186/s40494-019-0314-6 RESEARCH ARTICLE Open Access Primary research on the bronze technology of Lower Xiajiadian Culture in northeastern China Chenyuan Li1*, Yanxiang Li1, Lixin Wang2, Kunlong Chen1 and Siran Liu1 Abstract The site of Habaqila is located in the area between Inner Mongolia and Liaoning provinces and dated to the 13th– 11th centuries BC. It was identifed as a metal production workshop of the Lower Xiajiadian Culture and revealed abundant metallurgical remains, including ore fragments, slags, technical ceramics, and stone implements. Scientifc analyses demonstrated that polymetallic ores were smelted to produce tin bronze and arsenical copper. Perforated furnaces might have been employed in this process. The site also revealed the frst known feld evidence of tin smelt- ing in a Bronze Age site of northern China. Systematic investigation of this site increases our understanding of metal- lurgical processes of Bronze Age culture in northern China. Keywords: Tin smelting, Cassiterite, Tin bronze, Arsenic bronze, Lower Xiajiadian Culture Introduction description of the materials for the discussion in a global Te archaeometallurgical studies in China can be traced perspective. Te origins of metallurgical technology and back to the middle of the last century, and the exchanges the natural resource supply chain of Bronze Age north- between western academia and Chinese scholars have ern China has been drawing more and more attention been increasing since 2000 [1]. Te Eurasia steppe is in tandem with archaeological studies [5]. Te Lower considered as an important region of the introduction of Xiajiadian Culture (LXC from the 2nd millennium B.C bronze technology into ancient China, and our research to the 1st millennium B.C.) was one of the earliest cul- is mainly focused on the early bronze cultures at the tures rising at the northeastern area of modern China northern frontier of modern China [2]. To unveil the dia- and played an essential role in the early development of chronic development of Bronze Age copper production metallurgy in China during the 2nd millennium BC [6]. technology in northern China, a series of archaeological LXC’s settlement pattern indicated a rather complicated reconnaissance and excavation activities were conducted social relationship involving intermarriage, defensive in Chifeng, Inner Mongolia following the discoveries of collaborations, resource exploration, and trade [7]. Te the national archaeological survey. Although this region bronze production technology of the LXC is represented is not part of the ancient China proper, the understand- by small artifacts, such as daggers and ornaments [8], and ing of Bronze Age cultures fourishing in this region is considered closely related to the Zhukaigou Culture could help to explain the origins of metallurgy in China in central Inner Mongolia, and Qijia and Siba Culture in [3] (Fig. 1). Te scientifc examination was applied in the Hexi Corridor [9], but sharply diferent from the Erli- the archaeometallurgical study since the 1980s in China gang Culture in the Central Plain [10]. Te tin might have [4], which has provided a more detailed and accurate been deliberately added and varied in content for dif- ferent types of artifacts [11]. Te recent fnds of mining *Correspondence: [email protected] and metallurgical remains in this region [12] suggested 1 Institute of Cultural Heritage and History of Science & Technology, that local polymetallic mineral deposits might have been University of Science and Technology Beijing, #906, Yejin Shengtai Building, #30, St. Xueyuan, Beijing 100083, China exploited by Bronze Age populations (Fig. 4). Based on Full list of author information is available at the end of the article pottery typology and radiocarbon analysis, several sites © The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creat iveco mmons .org/licen ses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/ publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. Li et al. Herit Sci (2019) 7:75 Page 2 of 15 Fig. 1 The sampling and sites location have been identifed as active during the Bronze Age and efciency, trading conficts or other socioeconomic cir- are the main focus of this article. cumstances, or based upon the demands of certain politi- Cassiterite has been considered as the only likely min- cal or religious purposes, would need solid evidence like eral resource used for tin production in antiquity all over that recovered from Habaqila site to reconstruct convinc- the world, and cassiterite deposits are much rarer com- ingly the full metallurgical repertoire. pared with the various and widespread copper mineral deposits [13]. According to modern geological databases, Site background most of the substantial deposits of cassiterite are located Tis research was mainly focused on a Bronze Age sites in the south of China, so discussions about possible tin called Habaqila named after the most nearby village. Te sources in northern China have never been systemati- village was administrated by the Yuzhoudi Town Govern- cally studied until researchers began to focus their atten- ment of Hexigtan Banner. Te site was discovered during tion on the tin-containing polymetallic deposits in the an archaeological investigation near the copper and stan- steppes of northern China, Mongolia, and Russia [14]. nous deposits recorded by modern prospection. Tere Tere are small scale cassiterite deposits that have been are three tin polymetallic mineral vein deposits around discovered in northern China by modern prospectors, the Habaqila site, and in a bigger geo-range, this region but based on modern industrial assessments, most of the should be considered as a mineral concentration zone mineral veins in this region are too meager for cost-efec- (Fig. 4). Additionally, several contemporaneous sites with tive exploitation, and the scattered distribution without lithic mining tools and ancient mining relics (Fig. 4) have the beneft of a modern transportation network further also drawn more attention to the potential for archaeo- reduces their commercial values [15]. However, the shal- metallurgical studies. Tese include the Xiquegou site, low depths of these deposits and cassiterite’s high resist- which has been systematically excavated and described ance to corrosion could endow certain lodes of cassiterite as a seasonal mining settlement of LXC [16], and the sand to form as sediments in the seasonal hydrographi- Yihewomente site with dozens of mining pits, plenty of cal system (alluvial ore) or surfcial mineral vines (eluvial lithic mining tools, and surfcial sediment of the tin min- ore) with high potential for smelting. Short transport eral vein. distances would have aided LXC prospectors and arti- Te Habaqila site is located aside the wadis of two sans in using these mineral veins for bronze production. major seasonal rivers, the Xar and Tsagaan Rivers. Te Indeed, traces of ancient mining and smelting activities core of settlement is located hundreds of meters south- have been recorded in the region, In addition, the avail- west by the modern Habaqila Village, Hexigten Ban- ability of poly-metallic minerals containing copper, tin, ner of Chifeng City. Te archaeological remains are and arsenic provides the prerequisite conditions for the mainly distributed on the ridge of small hills (Fig. 1). smelting of diverse bronze alloys, but the actual pro- Discovery of the site connected as a few pottery sherds duction techniques—which would be in part driven by and metallurgical wastes were unveiled during forest Li et al. Herit Sci (2019) 7:75 Page 3 of 15 rehabilitation projects, followed by illicit looting in recent years by local grave robbers. After thoroughly cleaning several looting pits, followed by two archaeo- logical surveys conducted at the site, pottery sherds, ore, slag, and animal bones were collected (Fig. 1). Te depth of the looter pits was no more than 1.5 m, and no multiple cultural strata could be recognized by observing the cross-section of the pits. Most of the slag and ores were found from two of the pits, and few small pieces of slag and ore were found no more than 400 m away from the pits and almost all on the edge of the hillside. Diagnostic pottery sherds were col- lected for typological identifcation. Te other relics such as the ore, slag, bones, and sinter refectory mat- ter were all collected together for further examination in the laboratory. About twenty pieces of slag, dozens of animal bones, and pieces of burnt soil were found after the cleaning up of the looting pits. Te greenish Fig. 3 The excavated slag samples (no SLAG01 and SLAG09) and bluish ores with dark brown minerals were all in handful sizes, most of the ore compositions were deter- mined through qualitative analysis with portable XRF, Analytical methods while more than thirty ores were collected, and twelve 26 samples were selected for analytical research. SLAG03 samples of both slag and ore were picked up for further was identifed as a vitrifed furnace/crucible fragments an alysis (Figs. 2, 3). Although the detailed context of without slag, and ORE01 and ORE11 contained too mini- the site could only be reconstructed after systematic mal mineral phases and therefore has been considered excavation, the slag as metallurgical wastes should not as gangue samples. Most of the samples were unearthed be moved far from the smelting location. Additionally, artifacts from the looting pits, whereas two slag and three the fnding of the copper ore together with the slag was ore samples were collected near the pits so therefore the most convincing evidence for the smelting activities linked contextually to the looters’ pits but without strati- which might suggest high-temperature metallurgical graphic context.