Cerchiara Mine, Borghetto Vara, Vara Valley, La Spezia Province, Liguria, Italy
|Latitude & Longitude (WGS84):||44° 11' 57'' North , 9° 42' 1'' East|
|Latitude & Longitude (decimal):||44.19944,9.70028|
|Köppen climate type:||Csb : Warm-summer Mediterranean climate|
|Name(s) in local language(s):||Miniera di Cerchiara, Borghetto Vara / Pignone, Val di Vara, La Spezia, Liguria, Italia|
This area [which is situated in the municipalities of Borghetto Vara and Pignone, near Faggiona (Pignone)] is certainly known since 1600, when hematite, associated to Mn minerals, was mined by locals to extract iron. The deliberate mining of Mn minerals started in 1790 and ended after WW II.
The Mn minerals are bound to jasper formations of Jurassic age.
Furthermore, some minerals (aragonite, serpentine subgroup minerals, etc.) are not related to the manganese mineralisation, although they occur inside the territory of the former mining concession. In fact, they have been found along the left bank of the Rendarena stream, near the eastern border of the mining concession, in small lenses of serpentinite embedded in sandstones, evidenced by stream erosion (Di Lisi, 2011).
81 valid minerals. 7 (TL) - type locality of valid minerals. 1 (FRL) - first recorded locality of unapproved mineral/variety/etc.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
66 - 145 Ma
|Cretaceous sedimentary rocks|
Huebner, J.S. (1980) Reviews in mineralogy, vol. 7: Pyroxenes - Mineralogical Society of America - P.H. Riber Ed., N.Y., p. 274.
Palenzona, A., Di Giovanni, F., and Borgo, E. (1988) La miniera di Manganese di Cerchiara (SP). Rivista Mineral. Ital., Milano, 4, 209-218.
Lucchetti, G., Cortesogno, L., and Palenzona, A. (1988) Low-temperature metamorphic mineral assemblages in Mn-Fe ores from Cerchiara mine (northern Appennine, Italy). N. Jb. Mineral. Mh., 8, 367-383.
Palenzona, A. and Bulgarelli (1989) Orientite e macfallite di Cerchiara (La Spezia). Riv. Miner. It., 1, 111-114.
Palenzona, A. and Di Giovanni, F. (1990) La serandite di Cerchiara (SP). Riv. Miner. Ital., XIII, fasc. 1, 42-43.
Palenzona, A. (1990) La sugilite di Cerchiara (SP). Riv. Mineral. Ital., 3, 153-154.
Cabella, R., Lucchetti, G., and Palenzona, A. (1990) Al-rich, Fe-poor manganoan sugilite in a pectolite-bearing assemblage from Cerchiara Mine (Northern Appennines, Italy). N. Jb. Mineral. Mh., 1990, 443-448.
Castellaro F. (2008) 160 volte Cerchiara. Prie, 4, 114-130.
Di Lisi, S. (2011) Aragonite ed ematite a Cerchiara. Prie, 7, 8-10.
Testabruna R. (2014) Armotomo a Cerchiara. Segnalazioni in breve. Prie, 10, 46.
Lepore G.O., Bindi L., Zanetti A., Ciriotti M.E., Medenbach O., and Bonazzi P. (2015) Balestraite, KLi2VSi4O10O2, the first member of the mica group with octahedral V5+. American Mineralogist, 100, 608–614.
Lepore, G.O., Bindi, L., Mugnaioli, E., Viti, C., Zanetti, A., Ciriotti, M.E., and Bonazzi, P. (2017) A multimethodic approach for the characterization of manganiceladonite, a new member of the celadonite family from Cerchiara mine, Eastern Liguria, Italy. Mineralogical Magazine: 81: 167-173.
Canadian Mineralogist: 31: 331-336.
Mineralogical Magazine: 60: 369-374.
Am. Min.: 86: 197.
Mineralogical Record: 27: 465.