— During the past 50 years Zambia emerged as a major emerald producer for the industry with its deposit near the Kafubu river. Interestingly in that area, unlike many …

This study provides the first quantitative geochemical, petrological, and mineralogical data on major rock types and minerals in the Kafubu area. Highly magnesian talc-chlorite ± actinolite ± magnetite metabasites hosting emerald mineralization are

The emerald mines are located in the Kafubu area (also known as the Ndola Rural Restricted Area) of central Zambia, about 45 km southwest of the town of Kitwe (figure …

Introduction During the past two decades, Zambia has become a world-class emerald-producing country. The entire Zambian emerald output, amounting to about 15% of the world market, comes from the Kafubu Area. The Kafubu Emerald Area (Fig. 1) covers approx. 200 km2 and includes several dozens of open-cast mines and prospecting pits.

 — During the past 50 years Zambia emerged as a major emerald producer for the industry with its deposit near the Kafubu river. Interestingly in that area, unlike many other emerald mining areas ...

 — The Kafubu Emerald Area in Zambia is an important producer of gemstone-quality emeralds. These are hosted mostly by metasomatic phlogopite-rich zones (max. 2 m wide) that rim numerous pegmatite dykes and epigenetic quartz …

Kafubu area (near the Kafubu River in the Ndola Rural Restricted Area) have produced emeralds of uniform color and size, which supported the cut- ... (Coats et al., 2001). The emerald deposits are distributed over ~200 km2 within 13°02'–13°11'Slatitudeand28°03'–28°11'Elongi-tude,onbothsidesoftheKafubuRiver. …

 — The Kafubu area is loc a ted geolog ic ally at the center of the tra n sconti nenta l P a n-Af- ... The Kafubu emerald deposits occur within metamorphic rocks of the Muva Supergroup.

 — Although emerald deposits were discovered in the Kafubu area of Zambia as early as 1928, the geological setting was only researched and reported after 1982 [5][6][7][8], then mentioned it was ...

This simplified geologic sketch map of the Kafubu emerald area, modified after Hickman (1973) and Sliwa and Nguluwe (1984), shows the distribution of major rock types and the main emerald deposits in the area. During late stages of the Pan-African orogeny, rare-element pegmatites and some beryllium-rich granites intruded various crustal units ...

 — Although emerald deposits were discovered in the Kafubu area of Zambia as early as 1928, the geological setting was only researched and reported after 1982 [5,6,7,8], then mentioned it was …

 — Emerald deposits in the Kafubu area occur within rocks of the Mesoproterozoic Muva Supergroup (1800-1100 Ma), composed of both metavolcanic and metasedimentary rocks. In the Kagem mine area, the Muva Supergroup overlays a basement complex that's about 1,800 to 2,050 million years old. It consists of talc …

This study provides the first quantitative geochemical, petrological, and mineralogical data on major rock types and minerals in the Kafubu area. Highly magnesian talc-chlorite ± actinolite ± magnetite metabasites hosting emerald mineralization are identified as metamorphosed komatiites. These rocks contain 3000–4000 ppm Cr, and provided the …

The Kafubu emeralds have relatively high specific gravity (2.69 – 2.77) and refractive index values, especially relatively to emeralds from Colombia. Beryl and emerald mineralisation in the Kafubu area typically forms as subhedral to euhedral hexagonal crystals that often grow in aggregates of multiple gemstones.

 — Zambia is one of the most significant emerald sources worldwide, second only to Colombia. Kagem emerald mine is located in the Ndola Rural Emerald Restricted Area and lies south of Kitwe and west …

This study provides the first quantitative geochemical, petrological, and mineralogical data on major rock types and minerals in the Kafubu area. Highly magnesian talc-chlorite ± actinolite ± magnetite metabasites …

Semantic Scholar extracted view of "The Kagem emerald mine: Kafubu Area, Zambia" by Steve Behling et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 218,542,677 papers from all fields of science. Search. Sign In Create Free Account.

Emerald mineralisation in the Kafubu area, including the Kagem deposits, belongs to a group referred to as "schist-hosted emeralds", relating to the interaction of Be-bearing fluids relating to pegmatite dykes or granitic rocks, with Cr …

The emerald mining district near the Kafubu River covers a total area of about 600 km 2, the Ministry of Mines and Minerals Development has subdivided it into more than 400 mining areas of ...

 — Highly magnesian talc-chlorite ± actinolite ± magnetite metabasites hosting... 8â 10 wt.% K2O, 3â 4 wt.% fluorine, 0.12â 0.74 wt.% Li2O, 1700â 2900 ppm Rb, ..... rently the deepest active mine in the Kafubu area, with good emerald production.

Emerald mineralisation in the Kafubu area, including the Kagem deposits, belongs to a group referred to as "schist-hosted emeralds", relating to the interaction of Be-bearing ... Figure K3: Simplified Geology of Kafubu Emerald Area The emerald deposits are hosted by talc-magnetite schists ("TMS") of the Muva Supergroup. The stratigraphy ...

 — The Kafubu Emerald Area in Zambia is an important producer of gemstone-quality emeralds. These are hosted mostly by metasomatic phlogopite-rich zones (max. 2 m wide) that rim numerous pegmatite dykes and epigenetic quartz-tourmaline veins in Mg-rich metabasites.Where these dykes/veins occur in other rock types, the phlogopite-rich …

Emerald mineralisation in the Kafubu area, including the Kagem deposits, belongs to a group referred to as "schist-hosted emeralds", relating to the interaction of Be-bearing …

Emerald mineralisation in the Kafubu area, including the Kagem deposits, belongs to a group referred to as 'schist-hosted emeralds', in which emeralds occur predominantly in phlogopite or other types of schists. The origin of schist-hosted emerald deposits is controversial, but is known to require specific ...

The entire Zambian emerald output, amounting to about 15% of the world market, comes from the Kafubu Area. The Kafubu Emerald Area ( Fig. 1) covers approx. 200 km 2 and includes several doz- ens ...

for emerald mineralization. In the Kafubu area, thick (up to 200 m) metabasite layers are intercalated in the mica schist–quartzite sequence. Deposition of the Muva Supergroup is

 — Emerald samples from the Kafubu area range in intensity of colour from light to dark green. The colour is unevenly distributed and often exhibits zon-ing. The emeralds have many inclusions and are ...

 — The zonation of Kafubu pegmatitic veins appears to have been much less complex than the classical Cameron (1955) sequences, and they resemble the simpler …

The Kafubu emerald mines are located in central Zambia, 45 km southwest of Kitwe, the nearest town. A relatively new emerald occurrence was discovered in the Musakashi area to the northwest of ...

Classic schist-hosted emerald deposits are generally attributed to interaction between invading pegmatitic magma or vapor phases with preexisting metasediments, metavolcanics, and/or ultrabasic rocks. Detailed studies of the Habachtal (Austria) and Leydsdorp (South Africa) emerald deposits indicate that the emerald formation was not …