Sa Malesa, Sa Bidda Beccia, Sarroch, Cagliari metropolitan city (Metropolitan City of Cagliari), Sardinia, Italy
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|Location is approximate, estimate based on other nearby localities.|
|Latitude & Longitude (WGS84):||39° North , 9° East (est.)|
|Margin of Error:||~10km|
|Köppen climate type:||Csa : Hot-summer Mediterranean climate|
|Name(s) in local language(s):||Sa Malesa, Sa Bidda Beccia, Sarroch, Città metropolitana di Cagliari, Sardegna, Italia|
|Other/historical region names associated with this locality:||Cagliari Province (1859-2016)|
Old mine (1800 or before) for arsenopyrite, located in the "sa Bidda Beccia" mining area, near the Monte Nieddu stream and Sa Stria dam, where the Cu-Fe-As mineralisation in quartz gangue is hosted in Palaeozoic schists.
The second world occurrence for bulachite has been reported from the mine dump (Frau & Da Pelo, 2001). The mineral occurs as sparse, whitish, satiny, crumbly polycrystalline aggregates on mansfieldite and goethite encrusting quartzite clasts. Bulachite is intimately mixed with kaolinite, illite and an amorphous allophane-like phase, and with minor amounts of quartz and Fe3+ oxyhydroxides. Bulachite crystals occur as very slender, curved fibres aggregated into radial or sub-parallel groups.
12 valid minerals.
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Baldracco, C. (1854): Cenni sulla costituzione metallifera della Sardegna. Tipografia Marzorati, Torino, 530 pp.
Jervis G. (1881): I tesori sotterranei dell'Italia. Vol. 3: Regioni delle Isole. Sardegna e Sicilia. Addenda ai precedenti volumi. Loescher, Torino, XXII+539 pp.
Billows, E. (1941): I minerali della Sardegna e i loro giacimenti. Tipografia V. Musanti, Cagliari, 167 pp.
Frau, F., Da Pelo, S. (2001): Bulachite, a rare aluminium arsenate from Sardinia, Italy: the second world occurrence. Neues Jahrb. Mineral. Monatsh, 18-26.