Database name: |
World Fe-oxide+/-Cu-Au-U (IOCG) deposits |
Compilers: |
Sunil S. Gandhi |
Release date: |
2015-03-04 |
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Deposit name(s): |
Capo Calamita; Calamita |
Political location(s): |
Italy; Province or state: Tuscany; Subprovince or locality: Elba Island; Nearest community: Rome (194 km 299°) |
Deposit clan (type): |
Iron Skarn-type |
Deposit (sub) types: |
magnetite-ilvaite skarn in carbonate rocks occur as lenses up to 60 x 100 m, and also as irregular masses and veins; Reference: Zitzmann, A. (Editor(s)), 1978: The Iron Ore Deposits of Europe and Adjacent Areas: Explanatory Notes to the International Map of the Iron Ore Deposits of Europe, 1:2,500,000 (Lists and Tables); International Geological Congress, Commission for the Geological Map of the World, Subcommission for the Metallogenic Map of the World, Bundesanstalt fur Geowissenschaften und Rohstoffe, Postfach 51 01 53, D-3000 Hannover 51, Volume II, 386 p. |
Deposit status: |
past producer; Size category: unknown; Status comments: one of the larger old Elba mines exploited since 2500 years ago; hematitic ore with magnetite pseudomorph after hematite; total ore production in Elba estimated at 50 Mt and resources of some 26 Mt |
Geologic province: |
Alpine Orogen |
Geologic subprovince: |
Apennines |
Geologic district: |
Northern Apennines |
Deposit object located: |
open pit - centre |
Commodities: |
Fe |
Geological ages: |
Late Miocene (mineralization) Late Miocene (related magmatics) |
Tectonic setting: |
continental unstated-unqualified; extensional; Formal name: Late Miocene extension and related plutonism (related igneous rocks) |
Coincident features: |
brecciation along a stratigraphic horizon (clasts of iron ore in breccia and lack of mineralization channels leading to them indicate pre-brecciation origin of mineralization); Coincident feature name: Complex III of Elba Island host lithology (carbonates of Rhaetean and Liassic formations of Complex II of Elba Island); Coincident feature name: Calcare Cavernoso Formation |
Regional tectonic structure: |
shallow-dipping extensional slides of Late Miocene age with eastward transport (Capo Calamita, Terra Nera, Rio Marina and Rio Albano deposits transported with detachments) Tectonic structure name: Extensional Allochthons |
Related igneous rocks: |
(1) intrusive; granodiorite-tonalite-diorite suite (deposit genetically related to the intrusion); Initials: Monte Capanne granodioritic pluton; Magma series: calc-alkaline; Depositional setting: continentalIndividual lithologies: | granodiorite (Late Miocene pluton in the western part of Elba Island, related to the poorly exposed Porto Azzurro quartz monzonite to the east) |
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Metallogenic signatures: |
Fe-Cu |
Alteration signatures: |
oxidation and supergene enrichment: limonite, ilvaite; What was altered: iron oxide ore |
Mineralogy: |
(alteration): ilvaite, ferrosalite, ferroactinolite, grossularite, epidote (mineralization): cassiterite, pyrite I, hematite I, magnetite I, mushketovite, magnetite I, magnetite II, hematite II, chalcopyrite, galena, pyrrhotite, magnetite III, pyrite II |
Qualified comments: |
(Applies to: mineralization) One of the larger old Elba mines exploited since 2500 years ago; hematitic ore with magnetite pseudomorph after hematite; total ore production in Elba estimated at 50 Mt and resources of some 26 Mt. Ore reportedly contained 54 % Fe and 1.19 % S; presence of pyrite, chalcopyrite and pyrrhotite in the ore is noteworthy; deposit is regarded as partially metamorphosed and remobilized or reconstituted.
(Applies to: mineralization) Magnetite-ilvaite skarn in carbonate rocks occur as lenses up to 60 x 100 m, and also as irregular masses and veins. |
References: |
Duenkel, I.; Kuhlemann, J.; Nohlen, U., 2003 |
Iron Ore Formation and Neotectonic Evolution in Elba (Tuscany, Italy) during Messinian Plutonism |
Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen, Volume 230, p. 391 - 407 |
Zitzmann, A., 1977 |
The Iron Deposits of Italy |
in The Iron Ore Deposits of Europe and Adjacent Areas: Explanatory Notes to the International Map of the Iron Ore Deposits of Europe, 1:2,500,000 (Text and Figures), Edited by Walther, H. W.; Zitzmann, A., International Geological Congress, Commission for the Geological Map of the World, Subcommission for the Metallogenic Map of the World, Bundesanstalt fur Geowissenschaften und Rohstoffe, Postfach 51 01 53, D-3000 Hannover 51, Volume I, 418 p, p. 209 - 218 |
Zitzmann, A. Editor(s)), 1978 |
The Iron Ore Deposits of Europe and Adjacent Areas: Explanatory Notes to the International Map of the Iron Ore Deposits of Europe, 1:2,500,000 (Lists and Tables) |
International Geological Congress, Commission for the Geological Map of the World, Subcommission for the Metallogenic Map of the World, Bundesanstalt fur Geowissenschaften und Rohstoffe, Postfach 51 01 53, D-3000 Hannover 51, Volume II, 386 p. |
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