THE TUNGSTEN AND TIN SIGNATURE OF IRON ORES FROM ELBA ISLAND (ITALY): A TOOL FOR PROVENANCE STUDIES OF IRON PRODUCTION IN THE MEDITERRANEAN REGION |
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| Authors: | M. BENVENUTI A. DINI M. D'ORAZIO L. CHIARANTINI A. CORRETTI P. COSTAGLIOLA |
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| Affiliation: | 1. Dipartimento di Scienze della Terra, Università degli Studi di Firenze, Via G. La Pira 4, 50121 Firenze, Italy;2. Istituto di Geoscienze e Georisorse, C.N.R., Via G. Moruzzi 1, 56124 Pisa, Italy;3. Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, 56126 Pisa, Italy;4. Laboratorio di Scienze dell'Antichità, Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy |
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| Abstract: | The mineralogy, petrography and major‐ and trace‐element composition of iron ores from Elba Island (Tuscany, Italy), one of the most important iron sources in the Mediterranean area since the first millennium bc , revealed that hematite‐rich ores display prominent enrichments in W and Sn (up to 4950 μg g?1 and 8400 μg g?1, respectively). These two elements are hosted by tiny grains of W–Sn mineral phases (ferberite, scheelite and cassiterite) that are disseminated throughout the hematite matrix. A comparison with iron ores from many Italian and European localities (most of which were exploited in ancient times) suggests the uniqueness of the geochemical pattern of Elba Island hematite‐rich ores (i.e., high W and Sn, low Mo and low Cu, Pb and Zn). We suggest that this geochemical signature may represent a new provenance marker not only for discarded ore at smelting/smithing sites, but, possibly, also for metallurgical slag and smelted metal produced in the chaîne opératoire of the iron process. |
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| Keywords: | IRON ORE PROVENANCE ANCIENT SLAGS GEOCHEMICAL TRACEABILITY ICP– MS ELBA ISLAND TUSCANY |
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