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| | Book (volume) | | orthoclase. Erongo. Height 15 cm. M. Sussmanncollection . .; J. Scovil. Foreword Namibia experienced...am able to enjoy this exceptional new book on Namibia and it's mineralogical treasures now. The first...laymen like me. The mineralogical rarities of Namibia are introduced with excellent pictures and informative...Kruger Foundation Introduction Whenthe book "Namibia- Minerals and Localities",with 850pages(rather...first part of the original book:the localitiesin Namibia. Sussman (Tucson,AZ, USA),ErnstA. on theseinc | 👁 Image
| | Journal (article/letter/editorial) | | resources of anorogenic alkaline complexes in
Namibia: A review
F. Pirajno
a
a
Geological Survey of...resources of anorogenic alkaline complexes in Namibia: A review, Australian
Journal of Earth Sciences:...resources of anorogenic alkaline complexes in Namibia:
A review
F. PIRAJNO
Downloaded by [Dalhousie...Plain Street, East Perth, WA 6004, Australia.
In Namibia there are numerous anorogenic alkaline complexes...carbonatites, mineralization, Namibia.
INTRODUCTION
In southwestern Africa (Namibia, southern Angola and
northwestern | 👁 Image
| | Report (issue) | | SURVEY
NAMIBIA
1990
Open File Report MRS 12
2
Abstract
Niobium-tantalum
mineralisation in Namibia occurs...basement rocks of the Namaqualand Metamorphic
Complex, and with rare metal pegmatites of late Namibian...with Pan African
and Mesozoic carbonatite and granite complexes.
In the past, niobium-tantalum minerals...by-products of Tin-mining operations in central Namibia (Uis,
Nainais, De Rust). Prominent niobium-tantalum...pegmatites occur in the Tantalite
Valley in southern Namibia and have been mined for a long time on a small | 👁 Image
| | Journal (article/letter/editorial) | |
K-Ar ages of the Brandberg and Okenyenyaigneous complexes,
north-western Namibia
Received: 10 August...intrusive units of the
Brandberg and Okenyenya igneous complexes, northwestern Namibia, confirm the Early...contemporaneous, although the range of ages from Brandberg,
135.2 _+ 1.5 to 125.4 + 1.3 Ma, suggests a rather...0.7 Ma. The mean
K - A r age of the Okenyenya complex is essentially
equivalent to previously determined...dating of this complex
(129.1-123.4Ma). K - A r chronology for the Brandberg complex is in conflict with | 👁 Image
| | Journal (article/letter/editorial) | | complexes and associated mineralisation in Namibia (Brandberg
and Erongo) related to the opening of the South...Mount Weld and Gifford Creek ferrocarbonatite complex in Western Australia, the
controversial Bayan Obo...events. The
causes and mechanisms of rifting are complex and are beyond the
scope of this contribution,...monzonite to syenite, alkali-syenite and
alkali-granite, and their volcanic equivalents. Nomenclature for...magmatic systems and carbonatites from Namibia (Brandberg, Erongo),
South Africa (Kruidfontein, Goudini) | 👁 Image
| | Journal (article/letter/editorial) | | Cretaceous anorogenic granites from Namibia
and implications for A-type granite genesis
R.B. Trumbull a,*, C...complexes in the Damaraland of west – central Namibia are silicic in composition.
Although all have trace...five largest
silicic complexes (Paresis, Erongo, Brandberg, Cape Cross, Gross Spitzkoppe) that provide...involved, and their relative proportions. The Paresis complex has an isotopic signature (d18O= + 9x
, eNd130...address: Geological Survey of Namibia, 1 Aviation Road, Windhoek, Namibia.
0024-4937/$ - see front matter | 👁 Image
| | Report (issue) | | MINISTRY OF MINES AND ENERGY
GEOLOGICAL SURVEY
NAMIBIA
I
1990
Open File Report MRS 05
2
Abstract
A...wide variety of semi-precious stones occur in Namibia, namely amazonite, the beryl
varieties,
chrysocolla...the most important semi-precious
stones found in Namibia. The major deposits of these semi-precious stones...formed within the thermal aureole of the Brandberg Alkaline Complex and
sodalite is a constituent of rocks...rocks of the Kunene Anorthosite Complex.
The Namibian output of semi-precious stones in 1989 was 967.6 kg | 👁 Image
| | Journal (article/letter/editorial) | | Gross Spitzkoppe and Klein Spitzkoppe stocks in
Namibia: Topaz-bearing A-type granites related to
continental...Geological Survey of Namibia, P.O. Box 2168, 1 Aviation Road, Windhoek, Namibia
c
Rosh Pinab Zinc Corporation...Corporation (Pty) Ltd, P.O. Box 115, Rosh Pinab, Namibia
Received 3 February 2006; accepted 4 December...The anorogenic Damaraland intrusive complexes in Namibia belong to the bimodal Paraná–Etendeka Large Igneous...in the Gross Spitzkoppe, Klein Spitzkoppe, Erongo, Brandberg,
Messum, Cape Cross, and Paresis complexes | 👁 Image
| | Journal (article/letter/editorial) | | evidence for the origin
of the Brandberg West area Sn–W vein deposits, NW Namibia
Received: 3 June 2005 /...Springer-Verlag 2006
Abstract The Brandberg West region of NW Namibia is
dominated by poly-deformed turbidites...up to mid-amphibolite facies by
Neoproterozoic granite plutons. The meta-sedimentary
rocks host Damaran-age...hydrothermal quartz vein-hosted
Sn–W mineralization at Brandberg West and numerous
nearby smaller deposits. Fluid...quartz suggests that the ore-forming
fluids at the Brandberg West mine were CO2-bearing
aqueous fluids represented | 👁 Image
| | Journal (article/letter/editorial) | | 07 January 2015
Goboboseb
Mountains
Brandberg
Region, Namibia
BRUCE CAIRNCROSS
Department of Geology...collected in the past few decades in the Brandberg region, Namibia. Excellent quartz specimens display a...forms that
add to the appeal of specimens from the area.
The quartz is well known for its luster, clarity...interest in the minerals of Namibia, particularly from Erongo and the Brandberg region.
442
ROCKS & MINERALS...2001). The Brandberg
Mountain is no exception. It is an imposing feature in central Namibia where it is | 👁 Image
| | Journal (article/letter/editorial) | | Petrogenesis of the Gross Spitzkoppe topaz granite, central western
Namibia: a geochemical and Nd–Sr–Pb isotope...Spitzkoppe granite is one of several igneous complexes that formed in the Damaraland of
Namibia during an...along
with silicic units. The Gross Spitzkoppe granite is an important example of the latter because its...confirms that the composition of the Gross Spitzkoppe
granite can be produced by fractional crystallization from...of the GSS yield an age for emplacement of the complex at 125 F 1 Ma.
Initial 87Sr/86Sr ratios vary from | 👁 Image
| | Journal (article/letter/editorial) | | situated approximately 30
kilometers southeast of Brandberg Mountain, visible on the
horizon. Gerhard Louw...crystals, one
in matrix, from
the Three Aloes
mine, Namibia.
Collected in 2011.
The single crystal
is 8 mm...regional geology of the type locality consists of granite-gneiss and schist that host the tin-bearing pegmatites...describe four localities within an
approximate 300 km2 area that contain ferronigerite-2N1S
crystals in quartz-sillimanite...Plateau (fig. 2), located in the Plateau State.
This region has been a productive source of alluvial and
elluvial | 👁 Image
| | Journal (article/letter/editorial) | | and Picrite Dykes
of the Southern Etendeka Region,
NW Namibia: Windows into the Role of the
Tristan Mantle...
Abundant dykes in the southern Etendeka region, NW Namibia,
mostly contain 8–20% MgO. Almost all can...(ND), that may have fed part of the Huab sill complex. The dyke
ages are constrained by their field relationships...forsteritic macrocrysts is cut by the 131 Ma Brandberg plutonic
complex. Forward and inverse modelling of the...lithosphere thickness beneath and adjacent
to NW Namibia, and there was intense melting ( Tp =
>1500–1700°C) | 👁 Image
| Raab, M. J., Brown, R. W., Gallagher, K., Weber, K., Gleadow, A. J. W. (2005) Denudational and thermal history of the Early Cretaceous Brandberg and Okenyenya igneous complexes on Namibia's Atlantic passive margin. Tectonics, 24 (3) doi:10.1029/2004tc001688 | Journal (article/letter/editorial) | | Denudational and thermal history of the Early
Cretaceous Brandberg and Okenyenya igneous
complexes on Namibia’s Atlantic...published 2 June 2005.
[1] The Early Cretaceous Brandberg and Okenyenya
igneous complexes provide ideal...denudation history of the continental
margin of central Namibia. Apatite fission track
analysis has been applied...relief to constrain the
denudation history of this region. An advantage of
vertical profiles is that they...been estimated as 5 km in the
Brandberg area and 4 km for the Okenyenya area.
The data from the two vertical | 👁 Image
| | Book (edition) | | AiAiba / farm Anibib 136
8
Grosse Spitzkoppe, Erongo
9
,.
.,/,
loringa tree
Khomas Highland with...station Garub near Aus
Nature conservation, Erongo
16
Welwitschia, Goboboseb Mountains
17
....Northwest Region including Damaraland
The Central Namib Desertand Escarpment
The Spitzkoppen
The Erongo Mountains...The Central Escarpment- The Nauchas-Gamsberg-Hakos
Area
West and South of Rehoboth
The Central and South-CentralDeposits...Copper Deposits
The South
The Pegmatitesin Central Namibia
Luderitz and the Diamonds
44
49
241
254
272
275 | 👁 Image
| Keiding, Jakob K., Frei, Oliver, Renno, Axel D., Veksler, Ilya V., Trumbull, Robert B. (2013) Conditions of magma crystallization in the Henties Bay-Outjo dyke swarm, Namibia: Implications for the feeder system of continental flood basalts. Lithos, 179. 16-27 doi:10.1016/j.lithos.2013.07.018 | Journal (article/letter/editorial) | | crystallization in the Henties Bay-Outjo dyke
swarm, Namibia: Implications for the feeder system of continental...Available online 1 August 2013
Keywords:
Etendeka
Namibia
Thermobarometry
Magma plumbing
Dyke swarm
a b...t
The Henties Bay-Outjo dyke swarm (HOD) in NW Namibia presents a well-exposed example of the magma
feeder...highest temperatures (N1300 °C) are in a specific region of the HOD near the litho-tectonic boundary of...and
evolution in the Etendeka CFB Province of Namibia based on mineral–
melt equilibrium thermobarometry | 👁 Image
| CURTIS, C. G., TRUMBULL, R. B., DE BEER, C. H., HARRIS, C., REID, D. L., ROMER, R. L. (2011) GEOCHEMISTRY OF THE EARLY CRETACEOUS KOEGEL FONTEIN ANOROGENIC IGNEOUS COMPLEX, SOUTH AFRICA. South African Journal of Geology, 114 (3) 353-378 doi:10.2113/gssajg.114.3-4.353 | Journal (article/letter/editorial) | | EARLY CRETACEOUS KOEGEL FONTEIN
ANOROGENIC IGNEOUS COMPLEX, SOUTH AFRICA
C.G. CURTIS
Department of Geological...Fontein Igneous Complex in the Western Cape Province of South Africa is a high-level granite-syenite intrusive...trachyte-rhyolite) at
about 144 Ma, followed by the Rietpoort granite pluton and quartz-porphyry dykes at about 134 Ma...first geochemical study of the Koegel Fontein Complex.
Two groups of mafic units are distinguished based...along the
continental margin occur in and near the complex. These regional dolerites are much more homogeneous | 👁 Image
| Lustrino, Michele, Melluso, Leone, Brotzu, Pietro, Gomes, Celso B., Morbidelli, Lucio, Muzio, Rossana, Ruberti, Excelso, Tassinari, Colombo C.G. (2005) Petrogenesis of the early Cretaceous Valle Chico igneous complex (SE Uruguay): Relationships with Paraná–Etendeka magmatism. Lithos, 82 (3) 407-434 doi:10.1016/j.lithos.2004.07.004 | Journal (article/letter/editorial) | | Petrogenesis of the early Cretaceous Valle Chico igneous complex
(SE Uruguay): Relationships with Paraná–Etendeka...Abstract
The early Cretaceous (~130 Ma) igneous complex of Valle Chico (SE Uruguay) is made up of felsic...rocks and dykes cropping out over an area of about 250 km2. This complex is strictly linked with the
formation...quartz-monzonite to syenite, quartz-syenite and granite. The volcanic rocks and the dykes range from quartz-latite...ratios range from 0.5121 (syenite) to 0.5117 (granite). The
tholeiitic basalt show more depleted isotopic | 👁 Image
| Margirier, Audrey, Braun, Jean, Gautheron, Cécile, Carcaillet, Julien, Schwartz, Stéphane, Pinna Jamme, Rosella, Stanley, Jessica (2019) Climate control on Early Cenozoic denudation of the Namibian margin as deduced from new thermochronological constraints. Earth and Planetary Science Letters, 527. 115779 doi:10.1016/j.epsl.2019.115779 | Journal (article/letter/editorial) | | climate
on its erosion history. In western Namibia, the Brandberg Massif, an erosional remnant or inselberg...provide new apatite
(U–Th–Sm)/He dates on the Brandberg Inselberg that range from 151 ± 12 to 30 ± 2 Ma...margin and the formation of a pediplain around the Brandberg and enhanced
valley incision within the massif...massif. Additionally, aridification of the region since 35 Ma has resulted in
negligible denudation rates since...surface of the Earth’s continents is shaped by complex interactions between tectonics and climate. The | 👁 Image
| | Book | | REPUBLIC OF NAMIBIA -
MINISTRY OF MINES AND ENERGY
GEOLOGICAL SURVEY
THE MINERAL RESOURCES OF NAMIBIA
FIRST...ENERGY
Of the several hundred minerals present in Namibia, around sixty have been exploited. some, such as...base metals and industrial minerals have helped Namibia rank amongst the top five
mining countries in Africa...terms of production and reserves. In this context, Namibia is a major producer
of copper, lead, zinc, cadmium...unpublished. It is evident that mineral exploration in
Namibia, as elsewhere. has changed from serendipitous discoveries | 👁 Image
| | Journal (article/letter/editorial) | | granites of the
Beijing area in China, the anorogenic ~130 Ma granites of western Namibia, and the 20–15 Ma...Paleoproterozoic or Archean continental crust, in Namibia it was continental rifting and mantle
plume activity...remelting of newly hybridized lower crust. In
Namibia, partial melting of subcontinental lithospheric...
Keywords: A-type granite; Bimodal association; Rifting; Diabase; Rapakivi granite
1. Introduction
*...Geological Survey of Namibia, P.O. Box
2168, 1 Aviation Rd., Windhoek, Namibia.
0024-4937/$ - see front | 👁 Image
| | Journal (article/letter/editorial) | | in Peralkaline Granites from the Amis Complex,
Brandberg (Namibia): Evidence for Magmatic Pre-enrichment...The Amis Complex is a late intrusive phase associated with the Brandberg anorogenic granite intrusion...melt inclusions in coarse-grained arfvedsonite
granite and pegmatite give unequivocal evidence that the...the Amis Complex, Namibia, which is a satellite
intrusion of the Early Cretaceous Brandberg anorogenic...anorogenic
granite. The results provide direct evidence for extreme enrichments of Zr, Nb, REE, and volatiles | 👁 Image
| Trumbull, R. B., Reid, D. L., de Beer, C., van Acken, D., Romer, R. L. (2007) Magmatism and continental breakup at the west margin of southern Africa: A geochemical comparison of dolerite dikes from northwestern Namibia and the Western Cape. South African Journal of Geology, 110 (2) 477-502 doi:10.2113/gssajg.110.2-3.477 | Journal (article/letter/editorial) | | comparison
of dolerite dikes from northwestern Namibia
and the Western Cape
Robert B. Trumbull
GeoForschungsZentrum...volcanic margin of
southern Africa from northwestern Namibia to the Cape Peninsula. These dikes are under study...(HOD) in the high magma-flux Etendeka Province
of Namibia, and the False Bay dike swarm from the low-flux...asthenospheric sources. The dolerites from the HOD swarm in Namibia are mainly low-Ti tholeiites like their counterparts...rise in MgO contents of dikes in northwestern Namibia (maximum 8 weight % MgO for False Bay versus
16 | 👁 Image
| | Journal (article/letter/editorial) | | felsic magmatism in the
Cretaceous Paresis ring complex, Namibia: evidence for mixing
of crust and mantle-derived...the farthest inland of any felsic complex in the Cretaceous ring
complex group. The other ring complexes...the Congo craton and
related inliers in northern Namibia.
The comendites are peralkaline, highly differentiated...All rights reserved.
Keywords: Damaraland; Ring complex; Syenites; Comendites; Radiogenic isotopes; Magma...break-up of Gondwana
in the early Cretaceous in an area then underlain by
the Tristan mantle plume ŽPeate | 👁 Image
| | Report (issue) | | Geological Survey of Namibia)
MINISTRY OF MINES AND ENERGY
GEOLOGICAL SURVEY OF NAMIBIA
Director: B.G. Ho...Ho al
BULLETIN 1
Type mineralogy of Namibia
by
Vaughan C. Daltry
Editor: Clare Kennedy Galloway
Obtainable...the Geological Survey
P.O. Box 2168, Windhoek, Namibia
Price
Local (+GST)
Abroad (Post Free)
R20.00
R25... ______ ........
Abstract
The type mineralogy of Namibia is reviewed. One hundred and thirty-nine
(139)...Twenty-three (23) unnamed phases are also listed.
Namibia ranks second to Zaire as the most productive African |
|
