Gemstones
| Project Name: | LAKE MANYARA MOROGORO |
Click on map to enlarge |
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| Location: | Lake Manyara | ||
| The properties are located within the Karatu District in the Arusha region, approximately 12km north of Magara town and 2.5km from the western shore of Lake Manyara. | |||
| Morogoro | |||
| The licence is located at Matombo, in Morogoro District, approximately 25km southeast of Morogoro. | |||
| Area: | Lake Manyara | 5.88km2 | |
| Morogoro | 2.77km2 | ||
| The emerald licences are valid for an initial period of 10 years and confer the holder the right to prospect for and mine gemstones. Furthermore, all these licences can be extended for an additional 10 years. | |||
Access:
Lake Manyara
The licence areas can be accessed by dirt tracks that lead off the main Arusha - Dodoma tarmac road, towards Magara, along the south margin of Lake Manyara.
Morogoro
Access to the licence is via a dirt road running south from the main Dar es Salaam - Dodoma road at Morogoro. Dar Es Salaam is 200km to the east. The licence is located at Matombo, in Morogoro District.
Fresh Elephant Droppings on the road to Lake Manyara Emerald Licences
Geology:
Lake Manyara Emeralds
The host rock for the emeralds, and other gemstones, of the Lake Manyara area are largely metamorphic units of the Precambrian-aged Usagaran System. These units typically comprise felsic schists and biotite-actinolite schists with small pegmatitic veins common.
Emeralds and alexandrite are commonly associated with the contact zones between clear quartz vein and biotite-actinolite schists. Gemstones have also been recorded as occurring at the contact between thin veinlets of granite/syenite and biotite-actinolite schist.
NE- SW biotite-filled splay fault that contains the Emerald at Lake Manyana with one of the Artisanal Miners
Geological mapping indicates a series of large scale, northeast striking shear zones that trend parallel to sub-parallel to faults and as splays off the fault trend with east-west orientations (reidal shears). Emeralds and other precious minerals occur within boudins, shears and additional fractures within these structures, which acted as fluid conduits.