👁 Image
| | Journal (article/letter/editorial) | | its numerous deposits extends
from southwestern Uganda (Kigezi district) and Rwanda to eastern
Zaire (Maniema...and Kivu districts). The Fe-rich members of the
ferberite-huebnerite series constitute virtually the sole...without traces of alteration. On the
other hand, ferberite forms fine-grained masses of a dull-black color...reflect different generations.
The dull-black ferberite is an example of reinite. The name
reinite applies...applies to a variety of polycrystalline ferberite which is
pseudomorphic after scheelite, the Ca of scheelite | 👁 Image
| | Journal (article/letter/editorial) | | Zaire, Burundi, Tanzania, and Rwanda
to southwest Uganda in the north northeast. Its overall length is nearly...the west lake district of
Tanzania, and southwest Uganda. The latter area is the main subject of this paper...localities mentioned in the text: Uganda: Bj-Buhweju plateau; Ka-Kaniena Fe;
Ki-Kirwa W; Ke-Karenge
G 4 granite;...exceptionally well exposed at its northern end in southwest Uganda, where the
lower Proterozoic Buganda-Toro system... and as 'Karagwe-Ankolean' or 'Muva-Ankole'
in Uganda and Tanzania. The name 'Kibaran' was coined in | 👁 Image
| | Report (issue) | | 133(2)
Z=4
X-ray Powder Pattern: Kootenay Belle mine, Canada.
3.463 (100), 5.36 (80), 2.556 (50), 1.731...81
99.90
100.00
(1) Kootenay Belle mine, Canada. (2) Calacalani mine, Bolivia. (3) WO3 • H2 O.
Occurrence:...tungsten minerals, especially wolframite and ferberite, in
hydrothermal tungsten-bearing deposits.
Association:... wolframite, ferberite, scheelite.
Distribution: In the USA, from Lane’s bismuth mine, Monroe, north... Connecticut; in the Boriana mine, Mohave Co., and the Black Pearl mine, Camp Wood
district, Yavapai | 👁 Image
| | Report (issue) | | Fe2+ WO4
Ferberite
c 2001-2005 Mineral Data Publishing, version 1
Crystal Data: Monoclinic. Point Group:...Colfax Co., New Mexico; at the Monarch tungsten mine, Ubehebe district,
Inyo Co., California. From Mundo...crystals from Kirwa, Kigezi, Uganda. At Gejui, Hunan Province, China.
At the Tae wha mine, Chungju, North...and C. Escobar (1968) The crystal
structure of ferberite, FeWO4 . Zeits. Krist., 127, 61–72. (3) Ülkü | 👁 Image
| | Report (issue) | | = 8.700(5)
c = 7.070(5)
X-ray Powder Pattern: Uganda.
3.405 (100), 2.273 (52), 6.83 (36), 1.767 (21)...4.80
4.13
Total
99.97
100.00
(1) Nyamulilo mine, Uganda; RE = La 5.5%, Ce 41.8%, Pr 6.0%, Nd 24.8%,...tungsten deposits.
Association:
Ferberite.
Distribution:
In the Kirwa and Nyamulilo mines, Kigezi district...district, southwestern Uganda.
Name:
For CERium and TUNGSten in the composition.
Type Material:
University...Cerotungstite, a
cerian analogue to yttrotungstite, from Uganda. Bull. Geol. Soc. Finland, 42, 223–228. (2) (1972) | 👁 Image
| | Journal (article/letter/editorial) | | both within the belt and in foreland troughs.
The western molasse and the whole belt were again orogenically...Zaire, Burundi,
Tanzania and Rwanda to southwestern Uganda
in the NNE. Its overall length is nearly 1500 km...the West Lake district of Tanzania and
southwest Uganda. The northeastern province is
the main subject...Reviews 9 (1994) 105-130
)6
215ll
3IO°
--.?"-
I
UGANDA
...... ; 7 ; . .
,
315°
~
• ;,;Ruwenzori:Fold"...localities mentioned in the text: Uganda: Bj--Buhweju plateau; Ka--Kamena Fe; Ki Kirwa W; Ke--Karenge G4-granite; | 👁 Image
| Goldmann, Simon, Melcher, Frank, Gäbler, Hans-Eike, Dewaele, Stijn, Clercq, Friso, Muchez, Philippe (2013) Mineralogy and Trace Element Chemistry of Ferberite/Reinite from Tungsten Deposits in Central Rwanda. Minerals, 3 (2) 121-144 doi:10.3390/min3020121 | Journal (article/letter/editorial) | | Article
Mineralogy and Trace Element Chemistry of Ferberite/Reinite
from Tungsten Deposits in Central Rwanda...series (ferberite) and in the particular form of reinite, which
represents a pseudomorph of ferberite after...after scheelite. Primary ferberite, reinite and late
secondary ferberite are characterized by their trace...scheelite by ferberite is also documented in the trace
element composition. Primary ferberite shows high...Sr and Ba contents. Reinite and late secondary
ferberite display an uncommon trace element composition | 👁 Image
| | Journal (article/letter/editorial) | | approximately parallel to the modern
Central African or "Western" Rift, which intersects the
Kibara belt as well...exposure, mainly
along the uplifted borders of the Western Rift, allows the
observation of metamorphic grades...even granulite facies, thus indicating the
source region of the synorogenic granites. These events
were...bedding and schistosity planes.
The Nyakabingo ferberite mine at Shyorongi/Rwanda
was studied as a representative...and later grey quartz with platy ferberite, reinite (spongy
ferberite formed by replacement of original | 👁 Image
| | Journal (article/letter/editorial) | | W)
and gold metallogeny of the Central Africa
Region: a review
W. L. Pohl*1, M. Biryabarema2 and B....significance in the Central Africa or Great Lakes region, i.e. gold, tin,
tantalum and tungsten, are part...roof rocks above parental granites; mainly in its western part,
the zone of mineralisation retracts into...author, email walter@walter-pohl.com
66
A wide region in Central Africa is marked by abundant
tin, tantalum... W) and gold metallogeny of the Central Africa Region
Provinces of the Democratic Republic of the Congo | 👁 Image
| | Book | | East Africa
Burundi, Kenya, Rwanda, Tanzania and Uganda
Bruce Cairncross
Published by Struik Nature...12
Burundi
13
Kenya 14
Rwanda 16
Tanzania 17
Uganda 20
Gemological properties
21
A to Z of minerals...countries are
among the finest in the world. The region and its gems are particularly
dear to my family...most renowned gemstones from East Africa, this region is
also host to some of the world's finest examples...several other varieties of gemstone occur in the region and, while
perhaps not as popular, these too have | 👁 Image
| | Journal (issue) | | ............... 93
by A. Falster
The Rock Candy mine, British Columbia ................................Schoten
COVER: ELBAITE on
albite, from the Jonas
mine, Minas Gerais,
Brazil. Keith Proctor
specimen; photo...specimens are still recoverable from the dumps or in the mine work
ings.
LOCATION, ACCESS AND REGIONAL SETTING...Laranjeiras and, after a short slope, reaches the mine at the eleva
tion of 250 m.
The Baixio road runs...600 m.y.
67
Figure 1. The Boa Vista property. Mine dumps
are white in the thalweg below the cliff. | 👁 Image
| | Journal (article/letter/editorial) | | and
so-called granite gneiss domes, which deter
mine many of the characteristic features of
the geologic...segregations in the geologic structures of the Bindal
region of Northern Norway (27).
1 - biotite and biotite-hornblende...tung
sten mineralization.
in the Karelia-Kola region of the USSR. Ac
cording to Skaarup ( 27), scheelite...scheelite mineraliza
tion in the Bindal region of Northern Norway
(fig. 1) has been developed in skarned...oc
curring in quartz veins and veinlets. In this
region, several scheelite-bearing segregations
are known | 👁 Image
| | Journal (article/letter/editorial) | | (moldanubikum, Česká republika)
Occurrence of secondary ferberite at the Pekelný vrch hill near Jihlava
(Moldanubicum...was replaced and pseudomorphed by almost pure ferberite (0.07 - 0.17 hm. % MnO)
- variety reinite. Pseudomorphs...of porous fine crystal aggregates of secondary ferberite with minor
amount of monazite-(Ce), xenotime and...and Bi rich plumbojarosite.
Keywords: secondary ferberite, greisen, Pekelný vrch near Jihlava, Moldanubicum...Sannotake, Kibosan a Otome
mine (Horn 1930), Ugandě - Ruhizha, Nyamalilo, Kirwa
(Reedman 1973; Sahama 1981) | 👁 Image
| | Journal (issue) | | REPORTS FROM THE GEOLOGICAL SURVEYS
Kenya
•
•
Uganda
•
•
Tanganyika
British Territories
•
•
111...189
189
COLONIAL GEOLOGICAL ABSTRACTS
Part 2.-Uganda
.
•
•
•
•
•
•
•
191
BOOK REVIEWS
Africa...endeavours to appraise the total water
resources of a region and to dev-elop the maximum supplies for all purposes...knowledge of the available water resources of a region is a
pre-requisite to wise planning and successful...example, in the arid and semi-arid
regions of the western United States, that part of precipitation which | 👁 Image
| | Journal (issue) | | FROAt/ THE GEOLOGICAL SURVEYS
Kenya .
•
•
•
•
•
Uganda
•
•
•
•
•
•
•
Tanganyika
•
British Territories...Summary of Progress of the Geological Survey of Uganda for the Years
1929 to 1949
♦
♦
Outline of the Geology...a strip, narrowing in the south, bordering the
western edge of the Plateau. To the east is the desert-arid...TRANS-JORDAN
87
(b) the Rift Valley slopes;
(c) the Western Hill country;
(d) the Eastern desert;
(e) the Southern...are observable in terraces and
shoulders.
The Western Hill Country is discontinuous.
The Jebel 'Ajlun | 👁 Image
| | Book | | Fleet, 1974;
Nickel, 1973). The nickel deposits of Western Australia’s Yilgarn Craton have deep weathering...seen in aragonite (light and dark orange). (A þ D)
Region A exhibiting polycrystalline calcite within the...calcite overgrowth crystal in the inset. (B þ E) Region B with a crack running through the
crystal with...observed in the outer parts of the fracture. (C þ F) Region C shows calcite crystals (light blue color) extending...orientation of the reaction front in that particular region. The crystallographic directionality of the apatite | 👁 Image
| | Journal (issue) | | FRO.NI THE GEOLOGICAL SURVEYS
Kenya
•
•
•
•
Uganda
•
•
•
Tanganyika
•
•
Northern Rhodesia
•
Swaziland...this Range is not yet fully understood. In
the western sector beds clip dominantly to the south, as already...Maloney
fault respectively. In addition, in the region of the Moruga road, it
seems to be interrupted...be seen
at Galfa Point and in the Sangre Grande region.
299
GENERAL AND ECONOMIC GEOLOGY OF TRINIDAD...sh.oals in these Ranges and also in the Naparima
region. These shoals afforded favourable conditions for | 👁 Image
| | Book (chapter) | | Fleet, 1974;
Nickel, 1973). The nickel deposits of Western Australia’s Yilgarn Craton have deep weathering...seen in aragonite (light and dark orange). (A þ D)
Region A exhibiting polycrystalline calcite within the...calcite overgrowth crystal in the inset. (B þ E) Region B with a crack running through the
crystal with...observed in the outer parts of the fracture. (C þ F) Region C shows calcite crystals (light blue color) extending...orientation of the reaction front in that particular region. The crystallographic directionality of the apatite | 👁 Image
| | Journal (volume) | | Mineralization in the Migori Greenstone Belt, Macalder, Western
Kenya: J. S. Ogola. . . . . . . . . . . . . . ...Goedynamic Significance of Alkaline Magmatism in the
Western Mediterranean Compared with West Africa : B. Bonin...429
Post - Hercynian Tectonics in Northern and Western Africa:
R. Guiraud, Y. Bellion, J. Benkheli l an...Tertiary Alkaline
Lavas from the Kahuzi- Biega Region, Western Rift, Kivu, Zaire:
R. T. Lubala, A. B. Kampunzu...deposit, located
to the western end of the Migori greenstone belt in western Kenya at the northern
margin | 👁 Image
| | Book | | On a spectacular find of crocoite in the Adelaide
mine, Dundas, Tasmania (by A. H. Chapman)
3:111-113
ADOLFSSON...AJO
Famous mineral localities: the New Cornelia mine,
Ajo, Arizona (by W. J. Thomas & R. B. Gibbs)
14:283-298...Greece 22:303-308
ALBERTA
Mineral occurrences in western Canada [British
Columbia and Alberta] (by A. Ingelson)...ALLEN, GEORGE B.
--and W. Hunt: The Tonopah-Belmont mine,
Maricopa County, Arizona 19:139-144
ALLGOOD, GENNE...Allgood, C.
Williams: Ramsdellite from the Mistake mine
[Arizona] 14:333-335
ALLGOOD, ROBERT W.
-with G | 👁 Image
| | Book (edition) | | Linopolis, Brazil, H
Page 13: Gold, 35 mm.Eagle's est Mine, California, G
Publi!>hed
by Grdllit.u.o.
Stefanikova43...abbreviated, e.g. canton (Switzerland),
vilayet (Turkey), region (Chile), kray and oblast (Russia). The country...by Mobutu, and
is now the Katanga administrative region again. The
former Kivu province is now divided...United
States or of the Upper Silesian historical region in
Poland, where the importance of ore-bearing...Rice, Dolores co.,
both Colorado, at the Questa mine, Taos co., New
1994.
Abernathyite
K2[(UOJ 2l(AsO_J2]•6HzO | 👁 Image
| | Book | | K(U02)As04*3H20,
Tet. Vitreous yellow. Fuemrole
mine, Temple Mt., Emery Co., Utah, USA. H= 2-3, Djjj=...grey, bluish-grey, yellow,
light green. Langban mine, Filipstad (near), Varmland, Sweden. H= 5, Djjj=3...5As30ig, E Rhom. Translucent blue-green. Terres mine, St.
Ausdell, Cornwall, England and/or Johanngeorgenstadt...804)3 •nH20, ® Hex. Transparent
bluish. Lapis-lazuli mine, Sar-e-Sang, Badakshan, Afghanistan. H= 5.5-6, Djj4=...*21120,
Mon. Vitreous colorless, white. Dutoitspan
mine, Kimberley, South Africa. H= 4.5, Djjj= 2.630, D( | 👁 Image
| | Book (edition) | | Morocco; (center, left) wulfenite, San
Francisco mine, Sonora, Mexico; (center) ameihyst,
Veracruz, Mexico;...rnodochrosite, N’Chwaning mine, South Africa;
(lower left, center) wulfenite, Red Cloud mine,
Arizona; (lower...Pe
Wr
*
se vat
© C6 tad GAa Snive
Sr Certain Mine (ax agry
wh
Oe
ee
—
SS 4 eae
wid Bharce
©...
eda
i
oo A
“1
6 hat Neteny
Wang
Peet
Se
Mine
Carre
seh Ranier
ee
AAP
“i
:
ened’
en
Plt...coating fractures in sandstone at the Fuemrol
No. 2 mine, Temple Mountain, Emery County, Utah;
also sparsely | 👁 Image
| | Book (edition) | | Obshchestva
xiv
A
□
Abclsonite, CJ1H32N4 Ni, tric., Western Oil Shale Corporation drill core WOSCO,
Sec 36...Abernathyitc, K[(UO 2 )(AsO,)](HP) 3, tet., Fumerole No. 2 mine, Temple Mountain.
on the southeast flank of the...104(3). 326-328
□
Achavnlitc, FcSe, hex .. Cacheuta Mine. Ccrro de Cacheuta. Sierra de Cacheuta.
Mcndoza...AgardJte-(Ce),
CeCu.(AsO4)i(OH).-3H1O, hex., Clara mine, central Black Forest,
Gennany,A1ifSS(2004),17-23...(Y,Ca)Cu6(AsO.)i(OH).-3H1O. hex., Bou-Skourcoppcr mine, Ouarzazatc.
Morocco,SS, 1447
□
Mixite group
AgrelUte | 👁 Image
| | Book (edition) | | Morocco; (center, left) wulfen ite San
Francisco mine, Sonora, Mexico; (center) amethyst,
Veracruz, Mexico;...Mountains, Utah; (lower le ft)
rhodochrosite, N'Chwaning mine, Sou th A frica;
{lower left, center) wulfenite...coating fractures in sandstone at the Fuemrol
No. 2 mine, Temple Mountain, Emery County, Utah;
also sparsely...district, and at the
Little Emma mine, Clear Creek County; at the Enterprise mine, Dolores County; at the Double...MODE OF OCCURRENCE: Found in waste piles in
a coal mine in the L'vov-Volynskii basin, USSR. It is
found |
|
