Metal Technologies of the Indus Valley Tradition in Pakistan and Western India
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5 Metal Technologies of the Indus Valley Tradition in Pakistan and Western India Jonathan M. Kenoyer and Heather M.-L. Miller ABSTRACT In this paper we summarize the available literature and recent discoveries on the production and use ofmetals by peoples ofthe Indus Valley, Tradition ofPakistan and western India. Our primary focus is on the Harappan Phase (2600-1900 B.C.), and includes a review ofcollections and technical arialyses ofmetal artifacts, along with tables ofthe published analyses from the sites of Mohenjo-daro, Harappa, Lothal, and Rangpur. The potential ore sources for metals are discussed, with particular attention given to copper, arsenical copper, and tin bronzes but also including lead, gold, silver, and iron. We present an overview of evidence for Harappan Phase metal processing techniques, from smelting to finishing, and examine the use of metal in the context of an urban society that still uses stone tools. In conclusion we outline some future directions for archaeological and archaeometallurgical research in the subcontinent. [Final ms. received 10/96.] INTRODUCTION The Indus Valley Tradition ofPakistan and western vided access by sea to the resource areas of the Arabi India has been the focus ofconsiderable research over an Peninsula (Besenval 1992). the past two decades and scholars have begun to fill in We have chosen to use the chronology defined by many of the gaps in our understanding of regional ge Shaffer (1992), which is presented in Table 5.1 along ography, settlement patterns, subsistence, specific with its correlations to other more widely used but less technological developments and the chronology of precisely defined chronologies. As defined by Shaffer these changes (see Kenoyer 1991; Mughal 1990; Pos sehl 1990 for summaries). This paper provides an overview of the non-ferrous metal technologies in the TABLE 5.1 northwestern regions of the subcontinent, and of the GENERAL DATES AND ARCHAEOLOGICAL PERIODS role of these technologies during the Harappan Phase of the Indus Valley Tradition (2600-1900 B.C.). As the Early Food ProducingEra ca. 6500-5000 B.C. first such overview since Agrawal's seminal work in oZ Aceramic Neolithic 1971, we will focus on the presentation of often inac ~ Regionalization Era ca. 5000-2600 B.C. cessible data, summarizing the information available ~ ~ Early Harappan on metal sources, processing, and use. Cl Early Chalcolithic The Indus Valley Tradition was centered in the < Ceramic Neolithic ~ greater Indus plain, which was formerly watered by ~ 2600-1900 B.C. two major river systems, the Indus and the Ghaggar Integration Era (J) Mature Harappan Hakra (now dry) (Fig. 5.1). Adjacent regions which ~ Chalcolithic/Bronze Age were culturally integrated at various periods with this Cl Z B.C. vast double river plain include the highlands and ~ Localization Era 1900-1300 plateaus of Baluchistan to the west, and the moun Late Harappan tainous regions of northern Pakistan, Mghanistan, Iron Age and India to the northwest and north. The Thar Painted Gray Ware +1200-800 B.C. Desert and the Aravalli Hills formed the eastern pe Northern Black riphery. The coastal regions from Makran to Kutch Polished Ware (?700) 500 to 300 B.C. and Gujarat formed the southern boundary and pro I-' o 50 60 70 80 00 38 Figure 1. /14 36 Major Geographical Features of the A~~J Northwestern Subcontinent and Adjacent :(~: 36 Regions, including Metal Source Areas .........•... 34 34 KEY N Approximate Location 32 I of Major Metal Ores .... ... Tin -O + Cop'per j • Gold I RAN ~ ~ ~ ~ ~ +~} .... ~~\ t::l E:: ~ tr:I ~ 22 MUSCAT AND .... .". ·· .... ·.. ···20 :.' ~'" .. ' ,/'''-. o MAN 20 .'r...L~J.!!Lu. 54 56 74 76 18 Figure 5.1 Major geographicalfeatures ofthe northwestern subcontinent and adjacent regions, including metal source areas (composed byJ M. Kenoyer from various sources). METAL TECHNOLOGIES OF THE INDUS VALLEYTRADITION IN PAKISTAN AND WESTERN INDIA 109 TABLE 5.2 ARCHAEOLOGICAL TRADITIONS OF NORTHWESTERN SOUTH ASIA (AFfER SHAFFER 1992) INDUS VALLEY TRADITION BALUCHISTAN TRADITION HELMAND TRADITION Early Food ProducingEra Early Food Producing Era Early Food ProducingEra Mehrgarh Phase Mehrgarh Phase Ghar-i-mar Phase* Regionalization Era Regionalization Era Regionalization Era Balakot Phase Kachi Phase Mundigak Phase Amri Phase Kili Gul Muhammad Phase Helmand Phase Hakra Phase Sheri Khan Tarakai Phase* Kot Diji Phase Kechi Beg Phase Damb Sadaat Phase Nal Phase Integration Era Integration Era Integration Era Harappan Phase Kulli Phase Shahr-i Sokhta Phase Periano Phase Localization Era Localization Era Localization Era Punjab Phase Bampur Phase Seistan Phase Jhukar Phase Pirak Phase Rangpur Phase *The Ghar-i-Mar (Dupree 1972) and Sheri Khan Tarakai Phases (Khan et al. 1989) were not identified by Shaffer because the excavations are only recently published or not fully analyzed. (1992), the Indus Valley Tradition includes all human studies suggest that the Indus state was composed of adaptations in this greater Indus region from around several classes ofelites who maintained different levels 6500 B.C. until 1500 B.C. and later. This Tradition can of control over the vast regions of the Indus and be subdivided into four Eras and several Phases (Ta . Ghaggar-Hakra Valley. The rulers or dominant mem bles 5.1 and 5.2). The Early Food Producing Era (ca. bers in the various cities would have included mer 6500-5000 B.C.), as defined at the site of Mehrgarh, chants, ritual specialists, and individuals who con sees the beginning of domesticated plants and ani trolled resources such as land, livestock, and raw mals, as well as the first find ofcopper in the form ofa materials. Although these groups may have had dif bead (Jarrige 1983). The Regionalization Era (ca. ferent means of control, they shared a common ide 5000-2600 B.C.) follows, with the development of dis ology and economic system as represented by seals, tinct agricultural and pastoral-based cultures associat ornaments, ceramics, and other artifacts. This ideolo ed with various specialized crafts, including the melt gy would have been shared by occupational specialists ing and working of copper. During the Integration and service communities, who appear to have been or Era, which is represented by the Harappan Phase ganized in loosely stratified groups (Kenoyer 1991). (2600-1900 B.C.), we see the cultural, economic, and Political and economic integration of the cities may political integration of the vast region defined above. have been achieved through the trade and exchange This paper focuses on the state of metal processing of important socio-ritual status items, many of which during the Harappan Phase. would have been produced by specialized artisans The Harappan Phase of the Integration Era rep using complex pyrotechnologies to manufacture met resents the first urban civilization in southern Asia al objects, agate beads, steatite seals, stoneware ban and the earliest state-level society in the region (Ja gles, elaborately painted and specialized ceramics, cobson 1986; Kenoyer 1991; Meadow 1991). Recent and faience objects· (Kenoyer 1992a). PROBLEMS IN DEFINING THE ORIGINS AND DIFFUSION OF METAL TECHNOLOGIES The extensive overlapping exchange networks that sive model that copper-working technology was devel connected the greater Indus region to the metal re oped somewhere in West Asia and diffused to adjacent source areas ofWest Asia, eastern Iran, and Rajasthan regions such as the greater Indus region (see this vol make it difficult to determine the role of diffusion in ume and Agrawal 1971) is based on assumptions re the origins and dispersal ofvarious metal technologies, garding human cultural interaction and the control of especially copper metallurgy. The simplistic yet perva knowledge that are not supported by the archaeologi ...... 80 ...... I 0 31 Figure 2. .~" + 4 DJeltun <>.,)... Major Sites and Anau~ ~J.-.,\ . Geoksyur Namazga-depe @ ~ Basin _.. Interaction Networks 36 Indus, Baluchistan and Altln-depe .•••<.J ~ ,[~~ .. ~.: ..~.~ .. ~~..)! C" -\ Ghar-I-mar ~,-- -- Darra-I-Kur c.·· .. Helmand Traditions, Ghar-I-asp "', '- . 0:,.' , Regionalization Era. \ , ':::': \ {~ \ ~~~ I I ,M ••... N I ":::.. I -o 32 f ~ ~.... .... ~ ~ it' ~ o s:: ~ it' ...... \\\' 24 .. .~~ ( 22 ' ,._ :",,:, . Key: Reglonallzatlon Era Site•• Other Important Site. @ 100 Major Trade' Exchange Routes .-•••••• 11 Figure 5.2 Major sites and interaction networks ofthe Indus Valley, Baluchistan, and Helmand Traditions, Regionalization Era (drawn by J M. Kenoyer). METAL TECHNOLOGIES OF THE INDUS VALLEYTRADITION IN PAKISTAN AND WESTERN INDIA 111 cal data currently available for study (Kenoyer 1989). gion (Fig. 5.2). Sites such as Nausharo Uarrige 1990), Throughout West and South Asia, beginning in the Balakot (Dales 1979), Ghazi Shah (Flam 1993), Palaeolithic and continuing through the Neolithic, we Rehman Dheri (Durrani 1988), and Kalibangan find evidence for a familiarity with fire and its effect on (Agrawala 1984a; Lal and Thapar 1967) all show evi various materials. In the Upper Palaeolithic, iron ores dence for the use of copper in the period prior to were routinely roasted to make pigments (Schmandt the Harappan Phase, along with changes in other Besserat 1980) and chert was heated to make it more technologies. flakable. During the Neolithic and early Chalcolithic, Throughout southern and northern Baluchistan, pyrotechnologies included the firing ofdifferent types Mghanistan, and Rajasthan, the combined resources ofclays