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The copper slags of the Capattoli Valley, Campiglia Marittima, Italy

Andrea Manasse, Marcello Mellini and Cecilia Viti
The copper slags of the Capattoli Valley, Campiglia Marittima, Italy
European Journal of Mineralogy (October 2001) 13 (5): 949-960


Metal mining at Capattoli started in Etruscan times ( approximately VIII century BC) and continued during the Middle Ages. At present, approximately 7000 tons of slag (from chalcopyrite-galena-sphalerite mineralization in the Campiglia Marittima skarns) occur over 1500 m (super 2) . The average chemical composition of the slags is FeO 47.0, SiO (sub 2) 27.5, CaO 9.0 wt.%; S, Zn, Pb and Cu amount to 7-10 wt.%. All the slags were produced by melting chalcopyrite at T > or = 1100 degrees C, using self-fluxing charge and reducing conditions. Two olivines are common (fayalite and kirschsteinite), the two-olivine slags having a lower viscosity than one-olivine slags. Based on the present amount of slags, it is estimated that 700 tons of copper were produced, but this may be as high as 5000 tons when the historical removal of slags is taken into account.

ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 13
Serial Issue: 5
Title: The copper slags of the Capattoli Valley, Campiglia Marittima, Italy
Affiliation: Universita degli Studi di Siena, Dipartimento di Scienze della Terra, Siena, Italy
Pages: 949-960
Published: 200110
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 30
Accession Number: 2001-075370
Categories: General geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 5 tables
N42°19'60" - N44°19'60", E09°40'00" - E12°25'00"
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2020, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
Update Code: 200123
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