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Fortullino, Rosignano Marittimo, Livorno Province, Tuscany, Italy

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Latitude & Longitude (WGS84): 43° 26' 33'' North , 10° 24' 25'' East
Latitude & Longitude (decimal): 43.44266,10.40722
Name(s) in local language(s):Fortullino, Rosignano Marittimo, Livorno, Toscana, Italia


Fortullino is a mineral locality situated on the left side of Botro Fortulla, on the western slope of Poggio San Quirico. Various magnesite veins occur in this area of Poggio San Quirico and some of them have been mined within the limits of the Campolecciano mining concession. Fortullino is a well-known locality for melanophlogite (Grassellini Troysi & Orlandi, 1972), which occurs in a serpentinite breccia at the contact with magnesite veins.

Melanophlogite typically appears as translucent or transparent globules disseminated over the matrix. If observed under an electron microscope or a light microscope at a high magnification, the melanophlogite globules appear as spheroidal clusters of cubic microcrystals. Individual cubic crystals are rarely found. The origin is due to carbonatic alteration of the original serpentinite that has brought about the formation of Mg-rich carbonatic rocks and the segregation of the siliceous phase as melanophlogite and opal.
Melanophlogite is not the only mineral present here, but also other minerals occur such as dolomite, magnesite, cinnabar, kutnohorite, opal, quartz, and volkonskoite.

Furthermore, Fortullino is the name of a little promontory located in close proximity to the mouth of Botro Fortulla. Finds of calcite are known from the seashore close to Fortullino Beach, where rocks of the Palombini limestone–shale sequence crop out.

Mineral List


9 valid minerals.

Regional Geology

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

Cretaceous
66 - 145 Ma
Cretaceous sedimentary rocks

Age: Cretaceous (66 - 145 Ma)

Lithology: Sedimentary rocks

Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d. [18]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



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References

- Grassellini Troysi, M. & Orlandi, P. (1972): Sulla melanoflogite del Fortullino (Livorno). Atti della Società Toscana di Scienze Naturali, Memorie, Serie A, 79, 245-250.
- Gallo, S. (1974): Melanophlogite, a new and interesting find. Mineralogical Record, 5, 5, 207-208.
- Henderson, B. (1981): Microminerals. Mineralogical Record, 12, 6, 383.
- Lenzi, A. (1996): La melanoflogite di località Fortullino. Informatore. Giornale del Museo di Storia Naturale Rosignano Solvay, 1, 10-13.
- Domenici, V., Lenzi, A. (2005): Storia mineraria del territorio Livornese. [http://ulisse.sissa.it/biblioteca/saggio/2005/Ubib051001s007]
- Domenici, V., Lenzi, A., Taccone R. (2006): La melanoflogite di località Fortullino: uno studio strutturale del minerale. Codice Armonico 2006. Atti del Primo congresso di scienze naturali della Regione Toscana, 44-48. [http://www.musrosi.org/wp-content/uploads/2014/07/CA2006.pdf]

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