Sakoany deposit, Katsepy Commune, Mitsinjo District, Boeny Region, Mahajanga Province (Majunga), Madagascar
|Latitude & Longitude (WGS84):||15° 51' 18'' South , 46° 13' 50'' East|
|Latitude & Longitude (decimal):||-15.85500,46.23056|
|Name(s) in local language(s):||Sakoany (Sankoany), Kaominina Katsepy, Distrikan' i Mitsinjo, Faritra Boeny, Faritanin' i Mahajanga, Madagasikara|
A famous locality that has produced tons of magnificent celestine specimen. It is located near the village of Sakoany, on the western side of the banks of the Betsiboka River (where it empties into the Bombetoka Bay), at the northwestern coast of Madagascar. It is further located about 12 km south of Katsepy, the nearest administrative centre.
The celestine-bearing layer is found in a maximum 30 m thick lens between layers of crinoidal limestones and sandy greywacke of the Danien period (Jurassic, 65 million years old). The celestine occurs mainly as 2 different types: as geodes in varying sizes [Ratsimabazafy (1973) reported a geode about 60 cm in diameter and weighing 54 kg], and as crystal clusters up to 15 cm in diameter. The yearly production is about 15 tons (Pezzotta 1999).
The celestine was first discovered in 1967 and the diggings started first very close to the seashore. Later it was moved some hundreds meters away to a higher level (+ 15 m). The locality consists of numerous small, irregular, up to to 15 m deep holes in the ground.
1 valid mineral.
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|
- Ratsimbazafy, J.R. (1973): Quelques considerations sur le gisement de celestite de Sakoany. Rapport Annuel du service geologique (?)1973, Tananarive, pp 125-130.
- Humbert and Labumaz (1982): La célestite de Madagascar. Monde et Mínéraux 49 (septembre-octobre 1982): 4-7.
- Pezzotta, F. (1999): Madagaskar. Das Paradies der Mineralien und Edelsteine. Extra Lapis nr 17, 88-89. [German edition]
- Wilson, W.E. (2010): The Sakoany Celestine Deposit. Mineralogical Record. 41:405-416