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Using In-Slag Charcoal as an Indicator of “Terminal” Iron Production within the Angkorian Period (10th–13th Centuries AD) Center of Preah Khan of Kompong Svay, Cambodia

  • Mitch Hendrickson (a1), Quan Hua (a2) and Thomas Oliver Pryce (a3)

Recent fieldwork by the Industries of Angkor Project (INDAP) has identified the first extensive evidence of iron production within an Angkorian Khmer (9th to 15th centuries AD) center at Preah Khan of Kompong Svay (Preah Khan) in Preah Vihear province, Cambodia. This immense 22-km2 temple complex appears to be an outpost of Khmer settlement situated in close proximity to Phnom Dek (“Iron Mountain”), the richest known source of iron oxide in Cambodia. Combined with the fact that Preah Khan's temple architecture dates between the late 10th to early 13th centuries, the period that the Khmer greatly expanded their territorial influence, our primary hypothesis is that this complex was established to gain access to and monitor production of iron for the capital of Angkor. The vast number and size of these iron slag concentrations, some up to 5 m in height by 35 m in length, precludes the use of traditional excavation and dating methods. Instead, this paper employs 14C dating of “in-slag” charcoal from surface slag cakes to produce a spatial chronology of late or “terminal” industrial activities. The results indicate that metallurgy was “last” practiced at various locations within Preah Khan in the mid-13th to late 17th centuries, with 3 distinct clusters between the late 13th and late 15th centuries. Based on this initial survey of surface collections, it appears that iron production at Preah Khan occurred after the final phase of masonry construction. More significantly, this work provides the first robust set of dates for late Angkorian and Middle period industrial activities in Cambodia.

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Abrahamsen, N, Holm Jacobsen, B, Koppelt, U, De Lasson, P, Smekalova, T, Voss, O. 2003. Archaeomagnetic investigations of Iron Age slags in Denmark. Archaeological Prospection 10(2):91100.
Albrecht, G, Haidle, MN, Chhor, S, Heang, LH, Heng, S, Heng, T, Mao, S, Sirik, K, Som, S, Thuy, C, Laychour, V. 2000. Circular Earthwork Krek 52/62: recent research on the prehistory of Cambodia. Asian Perspectives 39(1/2):2046.
Aymonier, É. 1900. Le Cambodge: I. Le royaume actuel. Paris: Ernest Leroux. 477 p.
Bachmann, H-G. 1982. The Identification of Slags from Archaeological Sites. London: Institute of Archaeology.
Beavan, N, Halcrow, S, McFadgen, B, Hamilton, D, Buckley, BM, Shewan, L, Sokha, O, Fallon, S, Miksic, J, Armstrong, R, O'Reilly, D, Domett, K, Chhem, KR. 2012. Radiocarbon dates from jar and coffin burials of the Cardamom Mountains reveal a previously unrecorded mortuary ritual in Cambodia's Late- to Post-Angkor period (15th–17th centuries AD). Radiocarbon 54(1):122.
Ben-Yosef, E, Tauxe, L, Levy, TE. 2010. Archaeomagnetic dating of copper smelting Site F2 in the Timna Valley (Israel) and its implications for the modelling of the ancient technological developments. Archaeometry 52(6):1110–21.
Billard, R, Eade, JC. 2006. Dates des inscriptions du pays Khmer. Bulletin de la École française d'Extême-Orient 93:395428.
Bronk Ramsey, C. 2009. Bayesian analysis of radiocarbon dates. Radiocarbon 51(1):337–6.
Brown, RM. 2009. The Ming Gap and Shipwreck Ceramics in Southeast Asia. Towards a Chronology of Thai Trade Ware. Bangkok: The Siam Society under Royal Patronage.
Bruguier, B, Phann, N. 2005. Carte archéologique du Cambodge. MCBA-EFEO. Phnom Penh: Commission Nationale du Cambodge pour l'UNESCO.
Cœdès, G. 1968. The Indianized States of Southeast Asia. Honolulu: University of Hawaii Press.
Crew, P. 2002. Magnetic mapping and dating of prehistoric and medieval iron-working sites in northwest Wales. Archaeological Prospection 9(3):163–8.
Cunin, O. 2004. De Ta Prohm au Bayon. Analyse comparative de l'histoire architecturale des principaux monuments du style du Bayon [PhD thesis]. Nancy: L'Institut National Polytechnique de Lorraine. 482 p.
Duffosé, M. 1934. Monographie des peuplades Kouys du Cambodge. Extrême Asie 83:553–6.
Dupaigne, B. 1987. Les maitres du fer et du feu. Étude de la metallurgie du fer chez les Kouys du nord du Cambodge, dans le contexte historique et ethnographie de l'ensemble Kmer [PhD thesis]. Paris: Ecole des Hautes Etudes en Sciences Sociales. 659 p.
Eliyahu-Behar, A, Yahalom-Mack, N, Shilstein, S, Zukerman, A, Shafer-Elliott, C, Maeir, AM, Boaretto, E, Finkelstein, I, Weiner, S. 2012. Iron and bronze production in Iron Age IIA Philistia: new evidence from Tell es-Safi/Gath, Israel. Journal of Archaeological Science 39(2):255–6.
Evans, D. 2007. Putting Angkor on the Map: A New Survey of a Khmer ‘Hydraulic City’ in Historical and Theoretical Context. Sydney: University of Sydney. 245 p.
Fink, D, Hotchkis, M, Hua, Q, Jacobsen, G, Smith, AM, Zoppi, U, Child, D, Mifsud, C, van der Gaast, H, Williams, A, Williams, M. 2004. The ANTARES AMS Facility at ANSTO. Nuclear Instruments and Methods in Physics Research B 223–224:109–1.
Finot, L. 1925. Inscriptions d'Angkor XI. Temple de Mangalrtha. Ankor Thom. Bulletin de l'École française d'Extême-Orient 25:393406.
Godfrey-Smith, DI, Casey, JL. 2003. Direct thermoluminescence chronology for Early Iron Age smelting technology on the Gambaga Escarpment, Ghana. Journal of Archaeological Science 30(8):1037–50.
Greenfield, HJ, Miller, D. 2004. Spatial patterning of Early Iron Age metal production at Ndondondwane, South Africa: the question of cultural continuity between the Early and Late Iron Ages. Journal of Archaeological Science 31(11):1511–32.
Hendrickson, M. 2010. Historic routes to Angkor: development of the Khmer road system (9th to 13th centuries CE) in mainland Southeast Asia. Antiquity 84(324):480–9.
Hendrickson, M, Pryce, TO. 2011. Industries of Angkor Project: Iron Kuoy Project. March 2010 Field Campaign Report. Sydney: University of Sydney. p 49.
Hendrickson, M, Penny, D, Cooke, C, Pryce, TO, Hua, Q. 2010. Industries of Angkor Project: Preah Khan of Kompong Svay (Bakan). December 2009 Field Report. Sydney: University of Sydney.
Hendrickson, M, Pryce, TO, Hua, Q, Phon, K, Chan, S. 2012. Industries of Angkor Project: Preah Khan of Kompong Svay (Bakan). December 2010 Field Report. Sydney: University of Sydney.
Hua, Q, Barbetti, M. 2007. Influence of atmospheric circulation on regional 14CO2 differences. Journal of Geophysical Research 112: D19102, doi::10.1029/2006JD007898.
Hua, Q, Jacobsen, GE, Zoppi, U, Lawson, EM, Williams, AA, Smith, AM, McGann, MJ. 2001. Progress in radiocarbon target preparation at the ANTARES AMS Centre. Radiocarbon 43(2A):275–8.
Hua, Q, Barbetti, M, Zoppi, U, Fink, D, Watanasak, M, Jacobsen, GE. 2004. Radiocarbon in tropical tree rings during the Little Ice Age. Nuclear Instruments and Methods in Physics Research B 223–224:489–9.
Hua, Q, Barbetti, M, Levchenko, VA, D'Arrigo, RD, Buckley, BM, Smith, AM. 2012. Monsoonal influence on Southern Hemisphere 14CO2 . Geophysical Research Letters 39: L19806, doi::10.1029/2012GL052971.
Im, S. 2011. Ancient Iron Industry Project at Khvao: The Excavation Campaign 2010 and Preliminary Report. 20th ICC Technical Meeting. Siem Reap, Cambodia. 8–9 June 2011. p 13.
Jacques, C, Lafond, P. 2004. L'Empire Khmer. Cités et sanctuaires Vth–XIIIth siècles. Paris: Fayard.
Kern, H. 1880. Inscriptions cambodgiennes: inscription de Prea-Khan (Kompong Soai). Annales de l'Extrême-Orient 2:333–4.
Khin, S. 1988. Les Chroniques royales du Cambodge: II. Paris: EFEO.
Killick, D, Fenn, T. 2012. Archaeometallurgy: the study of preindustrial mining and metallurgy. Annual Review of Anthropology 41:559–7.
Living Angkor Road Project. 2008. Living Angkor Road Project Phase II Progressive Report, October 2007–March 2008. Nakon Nayok: Chulachomklao Royal Military Academy. p 200.
Living Angkor Road Project. 2009. Nakon Nayok: Chulachomklao Royal Military Academy.
Lunet de Lajonquière, É. 1902. Inventaire descriptif des monuments du Cambodge. Paris: Ernest Leroux.
Mak, P. 1981. Chroniques royales du Cambodge (de 1594 à 1677). Paris: École Française d'Extreme-Orient.
Mauger, H. 1939. Prah Khan de Kompon Svay. Bulletin de l'École française d'Extême-Orient 39(2):197220.
McCormac, FG, Hogg, AG, Blackwell, PG, Buck, CE, Higham, TFG, Reimer, PJ. 2004. SHCal04 Southern Hemisphere calibration, 0–11.0 cal kyr BP. Radiocarbon 46(3):1087–92.
Moura, J. 1882. Fabrication du fer chez les Cuois du Compong-Soai. Revue d'Ethnographie 1:435–7.
Nafilyan, G. 1967. Les mur dan l'architecture khmere. In: Annales de l'Universite' royale des beaux arts, 1967. Phnom Penh. p 6277.
O'Reilly, D, von den Driesch, A, Voeun, V. 2006. Archaeology and archaeozoology of Phum Snay: an Iron Age cemetery in northwest Cambodia. Asian Perspectives 45(2):188211.
Park, J-S, Rehren, T. 2011. Large-scale 2nd to 3rd century AD bloomery iron smelting in Korea. Journal of Archaeological Science 38(6):1180–90.
Pottier, C. 1999. Carte archaeologique de la region d'Angkor. Zone Sud [unpublished PhD thesis]. Paris: UFR Orient et Monde Arabe, Universite Paris III - Sorbonne Nouvelle. 3 volumes.
Pottier, C, Llopis, E, Soutif, D, Tan, C, Chevance, J-B, Kong, V, Chea, S, Demeter, F, Bacon, A-M, Bouchet, N. 2005. Mission Archéologique franco-khmère sur l'aménagement du territoire Angkorien. Campagne 2005. Rapport. MAFKATA. Siem Reap: École Française d'Extreme-Orient. Centre de Siem Reap, Angkor. 133 p.
Powell, AJ. 2003. Archaeomagnetic dating of furnaces and other features excavated at Hagg End and Ewecote, Bilsdale, North Yorkshire [PhD thesis]. Department of Archaeological Sciences. Bradford: University of Bradford. 86 p.
Provost-Roche, L. 2010. Nouvelles perspectives pour la connaissance de l'histoire de la fin de la période angkorienne au Cambodge: notes sur quelques bas-reliefs de la galerie intérieure du Bayon. Arts Asiatiques 65:7994.
Rasmussen, KL, Rahbek, U, Voss, O. 2006. Radiocarbon dating of the iron production in furnaces in Jutland. Journal of Danish Archaeology 14:127–3.
Reinecke, A, Vin, L, Seng, S. 2009. The First Golden Age of Cambodia: Excavation at Prohear. Bad Langensalza Embassy of the Federal Republic of Germany Phnom Penh.
Rostoker, W, Bronson, B. 1990. Pre-Industrial Iron. Its Technology and Ethnology. Philadelphia: Univ Museum Pubns. 232 p.
Stern, P. 1965. Les monuments Khmers du style du Bayon et Jayavarman VII. Paris: Presses Universitaires de France.
Thuy, C. 2010. Report on New Discovery of Forges. Chep-Mluprey 10th to 16th January 2010. Proposal to Inventory Prehistoric Sites in Cambodia. Phnom Penh: Royal Academy of Cambodia. 78 p.
Yoopom, I. 2010. The study of ancient iron-smelting furnaces at Ban Khao Din Tai, Ban Kruad district, Buriram province [MA thesis]. Bangkok: Silpakorn University.
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