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

Tanzanite
Merelani Hills, Lelatema Mts, Arusha Region, Tanzania

Photo: Rob Lavinsky
Latitude: 3°35'0"S
Longitude: 37°0'30"E
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

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

- Barot, N.R. and Boehm, E.W. (1992) Gem Quality Green Zoisite, Gems & Gemology: Spring 1992: 28(1).
- Can. Mineral. 46 (2008) 1183-1194.
- Mineralogical Record (2009) 40:347-408.

External Links


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Copyright © Jolyon Ralph and Ida Chau 1993-2013. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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