Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania

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Mererani

Gem mining area 70 km from Arusha, where tanzanite was first found in 1968.
Subdivided in four claims (A, B, C, D) and additional mines.

The occurrence of gem-quality tanzanite and grossular has been found to occur mainly in boudinaged pegmatitic veins and hydrothermal fracture fillings. These fracture fillings occur in brecciated and hydrothermally altered graphite-bearing gneiss in a mineral association containing glass-clear quartz, diopside, zoisite, graphite and calcite.

Mineral List

Mineral list contains entries from the region specified including sub-localities

Allanite-(Ce) 'Apatite' 'Apophyllite' Axinite-(Mg) (TL) Axinite-(Mn) Calcite 'Chabazite' Chalcopyrite Clinochlore Diopside var: Chromian Diopside Dravite

Fluorapatite Fluorite Graphite Grossular var: Tsavorite Gypsum Hematite 'Heulandite' Heulandite-Ca Karelianite Kyanite Laumontite

Mesolite Molybdenite Mukhinite Muscovite var: Fuchsite Phlogopite Prehnite Pyrite Pyrrhotite Quartz Rhodochrosite 'Scapolite' Scolecite

Siderite Sillimanite Sphalerite 'Stilbite' Titanite 'Tourmaline' Tremolite var: Chrome-Tremolite Wurtzite Zircon Zoisite var: Tanzanite

64 entries listed. 36 valid minerals. 1 type locality (valid mineral).

Localities in this Region

Tanzania Arusha Region Lelatema Mts Merelani Hills (Mererani) A-Block Mine B-Block Mine Opec pits (de Souza pit) C-Block Mine D-Block Mine Machakecho workings Mawaya pit Samax Mine

References

External Links