👁 Image
| Bybee, G.M., Hayes, B., Owen-Smith, T.M., Lehmann, J., Ashwal, L.D., Brower, A.M., Hill, C.M., Corfu, F., Manga, M. (2019) Proterozoic massif-type anorthosites as the archetypes of long-lived (≥100 Myr) magmatic systems—New evidence from the Kunene Anorthosite Complex (Angola) Precambrian Research, 332. 105393 doi:10.1016/j.precamres.2019.105393 | Journal (article/letter/editorial) | | magmatic systems—new evidence from the Kunene Anorthosite Complex (Angola)
G.M. Bybee, B. Hayes, T.M. Owen-Smith...magmatic systems—new evidence from the Kunene Anorthosite Complex (Angola), Precambrian Research (2019)...magmatic systems—new evidence from the Kunene Anorthosite Complex (Angola)
G.M. Bybee*1, B. Hayes1,2,...+27117176633
Keywords
massif-type anorthosite, Proterozoic anorthosite, Angola, Kunene, long-lived magmatism
Abstract...detailed field observations from the Kunene Anorthosite Complex
(KAC) of SW Angola. Our main objective | 👁 Image
| Maier, W. D., Rasmussen, B., Fletcher, I. R., Li, C., Barnes, S.-J., Huhma, H. (2013) The Kunene Anorthosite Complex, Namibia, and Its Satellite Intrusions: Geochemistry, Geochronology, and Economic Potential. Economic Geology, 108 (5) 953-986 doi:10.2113/econgeo.108.5.953 | Journal (article/letter/editorial) | | Economic Geology, v. 108, pp. 953–986
The Kunene Anorthosite Complex, Namibia, and Its Satellite Intrusions:...Finland
Abstract
The Kunene Complex of Namibia-Angola is one of the largest anorthosite massifs on Earth...distinct anorthosite and leucotroctolite intrusions. The Namibian portion of the
Kunene Complex measures...leucotroctolite with relatively altered,
“white,” anorthosite. Past studies and the present work have found...phases
of dark leucotroctolite into the white anorthosite, namely a relatively early, deformed, phase dated | 👁 Image
| Ernst, Richard E., Pereira, Eurico, Hamilton, Michael A., Pisarevsky, Sergei A., Rodriques, José, Tassinari, Colombo C.G., Teixeira, Wilson, Van-Dunem, Vitória (2013) Mesoproterozoic intraplate magmatic ‘barcode’ record of the Angola portion of the Congo Craton: Newly dated magmatic events at 1505 and 1110Ma and implications for Nuna (Columbia) supercontinent reconstructions. Precambrian Research, 230. 103-118 doi:10.1016/j.precamres.2013.01.010 | Journal (article/letter/editorial) | | prior
to this study was the 1380–1370 Ma (Kunene Intrusive Complex and related units). U–Pb TIMS ages on...the Kabanga-Musongati-Kapalagulu mafic-ultramafic complex and S-type granites. The outline of Angola is also...Archean to Paleoproterozoic highgrade gneisses and granite-greenstone supracrustal terranes
overlain by Mesoproterozoic...Midsommerso- Zig-Zag Dal
& Hart River
Mashak
1300
KUNENE &
KAB-KIB
Chieress
Pilanesberg & related
alkaline...Herein
Angola/Namibia (Congo
Craton)
Gabbro-anorthosite
complex
1385 ± 25 (z)
1371 ± 3 Ma (z)
1385 ± 8 Ma | 👁 Image
| | Journal (article/letter/editorial) | | Article
Fe–Ti(–V) Oxide Deposits of the Kunene Anorthosite
Complex (SW Angola): Mineralogy
and Thermo-Oxybarometry...Published: 14 December 2017
Abstract: The Kunene Intrusive Complex (KIC), in NW Namibia and SW Angola, is...is one of the
largest Proterozoic anorthosite massif-type exposures in the world. A geochemical, mineralogical...ilmenite; exsolution; nelsonite; massif-type anorthosite; Fe–Ti
oxide thermometry
1. Introduction
Magmatic...and
rare-earth elements (REE) [4,7].
The Kunene Intrusive Complex (KIC), located in SW Angola and NW Namibia | 👁 Image
| | Journal (article/letter/editorial) | | discuss t w o typical Archaean crustal units: the granite-greenstone terrain of the Kaapvaal craton and the...wealth of new information on the
Ancient Gneiss Complex of Swaziland, based largely on the excellent w...Surprisingly, no mention is made of the fact that the granite terrain
of the Kaapvaal craton contains large portions...are similar in appearance to the Ancient Gneiss
Complex and the Sand River gneisses of the Limpopo belt...discussion on the origin and evolution of the
Kaapvaal granite~greenstone terrain is clearly one of the bighlights | 👁 Image
| | Journal (article/letter/editorial) | | the Mesoproterozoic
anorthosite and related rocks of the Kunene
Intrusive Complex, NW Namibia
K. Drüppel...the large (c. 18.000 km2 ) anorthosite body of the Kunene Intrusive Complex, Angola/Namibia, which is...is associated
with minor marginal granite bodies and syenite/syenodiorite dykes, marked the beginning of...characteristics for the anorthositic rocks of the Kunene
Intrusive Complex (i.e. high Al2 O3 , CaO, Sr and Eu, intermediate...and Nd isotope data, however, suggest that the anorthosite magma underwent
minor crustal contamination, | 👁 Image
| | Journal (article/letter/editorial) | | crustal evolution of southwestern Africa involved a complex interplay over 600 million years of subduction...Bushmanland and Garies Terranes. Widespread intrusion of granite into the base of the crust
accompanied collision...collision in northwestern Namibia. Syntectonic granite magmatism was extensive and voluminous during O’okiepian...During the Mesoproterozoic assembly of the Southern
African part of Rodinia, there were at least four
main...Bushmanland Terrane into a northern Aggeneys
SOUTH AFRICAN JOURNAL OF GEOLOGY, 2012, VOLUME 115.4 PAGE 417-448 | 👁 Image
| | Journal (article/letter/editorial) | | metamorphic rocks south of the anorthositic Kunene Intrusive Complex (KIC) have
previously been ascribed to...to the Palaeoproterozoic Epupa Complex at the SW margin of the Congo craton and were thus
thought to be...located in NW Namibia, south of the large Kunene
Anorthosite Complex, and was mapped as two
distinct, fault-bounded...Planetary Science Letters 230 (2005) 355–378
complex magmatic and metamorphic history. The
oldest gneisses...Palaeoproterozoic in age and
ascribed to the Epupa Complex [11,12], which is
situated at the southwestern | 👁 Image
| | Journal (article/letter/editorial) | | anorthositic rocks of the southern
part of the Kunene Intrusive Complex, NW Namibia
KIRSTEN DRÜPPEL*, VOLKER VON...anorthositicrock suite of the Proterozoic Kunene
Intrusive Complex (KIC) in NW Namibia. All investigated...Our results clearly indicate that the Kunene
Intrusive Complex intruded into the lower crust and underwent...underwent nearly isobaric cooling.
Key-words: anorthosite, corona textures, garnet, Namibia, symplectites...symplectites.
Introduction
Massif-type anorthosite complexes are characteristic features of the Proterozoic crust | 👁 Image
| | Journal (article/letter/editorial) | | of the Epupa Complex (~1800 Ma), a banded quartzofeldspathic gneiss of the
Huab Complex (~1810 Ma), a...during the late Precambrian N a m a q u a and
Pan-African events.
INTRODUCTION
The basement rocks of northern...Damara belt. They can also be followed
across the Kunene River into southern Angola where they occupy a...Gneiss--migmatite-granite complex
~ 1700 Ma
Huab Complex
~ 1 8 0 0 Ma
Epupa Complex
> 2 1 0 0 Ma
...crustal segment in
southwestern Africa.
The Epupa Complex consists of a succession of metavolcanic and metasedimentary | 👁 Image
| Chemale, Farid, Philipp, Ruy Paulo, Dussin, Ivo Antonio, Formoso, Milton Luiz Liquintinie, Kawashita, Koji, Berttotti, Anelise Losangela (2011) Lu–Hf and U–Pb age determination of Capivarita Anorthosite in the Dom Feliciano Belt, Brazil. Precambrian Research, 186 (1) 117-126 doi:10.1016/j.precamres.2011.01.005 | Journal (article/letter/editorial) | | Lu–Hf and U–Pb age determination of Capivarita Anorthosite in the Dom
Feliciano Belt, Brazil
Farid Chemale...online 13 January 2011
Keywords:
Capivarita Anorthosite
Lu–Hf and U–Pb in situ dating
Mesoproterozoic...Feliciano Belt
a b s t r a c t
The Capivarita Anorthosite, formed in an intraplate environment and later...Dunkin, 2003; Takeda et al., 2006).
Worldwide anorthosite occurrences can be grouped mainly into
two genetic...northworthy that the period
when most larger anorthosite bodies were generated in the Earth’s
crust was | 👁 Image
| | Journal (article/letter/editorial) | | from
Sr–Nd–Pb isotopic composition of the Kunene Intrusive Complex, NW Namibia
Philipp Gleißner a,∗ , Kirsten...Massif-type anorthosite
Sr–Nd–Pb isotopes
Crustal contamination
Kunene Intrusive Complex
a b s t r a...Mesoproterozoic Kunene Intrusive Complex (Angola/Namibia), one of the largest massif-type
anorthosite complexes...characteristics of two successively emplaced
anorthosite varieties provide insight into the source and...anorthosites. The older white anorthosite suite consists of pyroxene-bearing anorthosite and leucogabbronorite | 👁 Image
| | Journal (article/letter/editorial) | | Mesoproterozoic basement reworked
during the Pan-African orogeny
S. Kröner, J. Konopásek, A. Kröner and...possible link of these two
belts prior to the Pan-African orogeny (~750 to ~450 Ma) can neither be confirmed...of our data.
Emplacement ages for several Pan-African granitoids, obtained by U-Pb and SHRIMP analyses...Ma during a
transpressional regime at peak Pan-African temperatures.
Introduction
Conflicting interpretations...the late Neoproterozoic to
early Palaeozoic Pan-African orogeny the distinction
between Neoproterozoic | 👁 Image
| | Report (issue) | | these semi-precious stones are related to late
Pan African pegmatites and Jurassic to Cretaceous granites...Brandberg Alkaline Complex and
sodalite is a constituent of rocks of the Kunene Anorthosite Complex.
The Namibian...semi-precious stones are being recovered from late Pan African
pegmatites, while amethyst is currently produced...close to the confluence of the
Marienfluss
and Kunene Rivers in Kaokoland. Also in Kaokoland, amazonite...discovered in numerous drusy pegmatites in the Mesozoic granite of
the Klein Spitzkuppe group of inselbergs in | 👁 Image
| Tauler, Esperança, Xu, Jingyao, Campeny, Marc, Amores, Sandra, Melgarejo, Joan Carles, Martinez, Salvador, Gonçalves, Antonio O. (2019) A New Kaolin Deposit in Western Africa: Mineralogical and Compositional Features of Kaolinite from Caluquembe (Angola) Clays and Clay Minerals, 67 (3) 228-243 doi:10.1007/s42860-019-00021-4 | Journal (article/letter/editorial) | | weathering of anorthosites from the Kunene anorthositic complex, but systematic studies of these kaolin...basement terrane is intruded by the anorthositic Kunene
Complex (Ashwal & Twist 1994; Mayer et al. 2004), a...(Njoya
et al. 2006) and one from the Sa Bandeira granite in Huambo
(Angola) are also shown for comparison...comparison in Tables 3 and 4. Sa
Bandeira granite has a very similar composition to the granites
which crop out...the
Al2O3 trend is increasing compared to the granite from
Sa Bandeira. SiO2 is high for all samples | 👁 Image
| | Journal (article/letter/editorial) | | 157 (20%); remarkably, the
proportion of South African PGE deposits is 27/69
(ca. 40%) (Shoji 2018). It...by-product
metal of PGE deposits, especially for South African
deposits. The contribution of gold to ER is 10%...chemical concentration of an
individual rock (e.g., granite, basalt and others), (2)
to estimate mass of the...continental crust, is dominated by felsic
rocks such as granite. This seems to suggest that the
crustal abundances...Ultramafic rocks from Pindar in Madawara Igneous Complex, Bundelkhand massif,
central India
Intrusive mafic | 👁 Image
| Shi, Yuruo, Liu, Dunyi, Kröner, Alfred, Jian, Ping, Miao, Laicheng, Zhang, Fuqin (2012) Ca. 1318Ma A-type granite on the northern margin of the North China Craton: Implications for intraplate extension of the Columbia supercontinent. Lithos, 148. 1-9 doi:10.1016/j.lithos.2012.05.023 | Journal (article/letter/editorial) | | elsevier.com/locate/lithos
Ca. 1318 Ma A-type granite on the northern margin of the North China Craton:...online 2 June 2012
Keywords:
Mesoproterozoic
A-type granite
North China Craton
Intraplate extension
Columbia...Identification of the Mesoproterozoic A-type Jining granite and granite porphyry, which with abundant coeval
mafic...supercontinent. Major and trace elements of the Jining granite show
an affinity to A-type granites, and may reflect...setting (A1‐type granite). High Rb, Y, Yb, and Ta
contents also show features of within-plate granites. SHRIMP | 👁 Image
| | Journal (article/letter/editorial) | | volcanosedimentary sequences and ca. 1.9–1.8 Ga granite-dominated intrusions, represent the final stabilization...BlockGa, of the NCC (e.g., Complex in Western Shandong and Qixia Complex in Eastern Shandong; [57–60])...including 1.62 Ga Longwangzhuang granite [61,62], 1.6 Ga, and 1.53 Ga A-type granite [63,64], and 1.47 Ga Panhe...B.L.; Armistead, S.; Plavsa, D.; et al. A full-plate global reconstruction of the Neoproterozoic. Precambrian...zircon U–Pb and Hf isotope evidence from the Huoqiu complex. Gondwana Res. 2015, 28, 1002–1018. [CrossRef] | 👁 Image
| He, Hai-Long, Song, Xie-Yan, Zhai, Ming-Guo, Yu, Song-Yue, Du, Zhi-Song (2019) Lower crustal contribution to the magma formation of the Damiao massif-type anorthosite, North China Craton: Evidence from zircon Hf-O isotopes. Precambrian Research, 332. 105396 doi:10.1016/j.precamres.2019.105396 | Journal (article/letter/editorial) | | the magma formation of the Damiao massif-type
anorthosite, North China Craton: Evidence from zircon Hf-O...the
magma formation of the Damiao massif-type anorthosite, North China Craton: Evidence from zircon Hf-O...the magma formation of the Damiao massif-type
anorthosite, North China Craton: Evidence from zircon Hf-O...associated mangerite,
charnockite and (rapakivi-) granite (AMCG suite) are mostly restricted in the “Earth’s...Damiao massif-type anorthosite in the North China Craton consists mainly of
anorthosite and leuconorite | 👁 Image
| Oriolo, Sebastián, Oyhantçabal, Pedro, Konopásek, Jiří, Basei, Miguel A.S., Frei, Robert, Sláma, Jiří, Wemmer, Klaus, Siegesmund, Siegfried (2019) Late Paleoproterozoic and Mesoproterozoic magmatism of the Nico Pérez Terrane (Uruguay): Tightening up correlations in southwestern Gondwana. Precambrian Research, 327. 296-313 doi:10.1016/j.precamres.2019.04.012 | Journal (article/letter/editorial) | | crust,
whereas Lu-Hf zircon data of the Illescas granite together with available Sm-Nd data of the
Campanero...other hand, metagabbros of the Zanja del Tigre Complex present U-Pb LA-ICP-MS zircon
ages of 1479 ± 4...two distinct magmatic events are
recorded in the African Congo Craton at ca. 1.77-1.75 and 1.53-1.45 Ga...orthogneisses of the
Valentines-Rivera Granulitic Complex, and supracrustal rocks of the Vichadero and
Valentines...Valentines-Rivera Granulitic
Complex is intruded by the Illescas rapakivi granite (Fig. 2a), which yielded | 👁 Image
| | Journal (article/letter/editorial) | | in Form eines riesigen Anorthosit-Massivs, dem Kunene-Intrusiv-Komplex, erstarrten. Dieser Gesteinskomplex...Gesteins-Bruchstücken ursprünglich ebenfalls um Anorthosite handelte, die zunächst teilweise zu Sodalith... Mikroskopische Untersuchungen der partiell umgewandelten Anorthosite konnten zeigen, dass sich die Sodalithe überwiegend...Seltenerd-Element-Verteilungs-Muster denen der Anorthosite entsprechen. Eine derartige Mineral-Umbildung...Untersuchungsergebnisse deuten darauf hin, dass die Anorthosite durch typische karbonatitische Fluide überprägt | 👁 Image
| Nascimento, Débora B., Schmitt, Renata S., Ribeiro, André, Trouw, Rudolph A.J., Passchier, Cees W., Basei, Miguel A.S. (2017) Depositional ages and provenance of the Neoproterozoic Damara Supergroup (northwest Namibia): Implications for the Angola-Congo and Kalahari cratons connection. Gondwana Research, 52. 153-171 doi:10.1016/j.gr.2017.09.006 | Journal (article/letter/editorial) | | belts
developed during the Neoproterozoic Pan-African Orogeny. The Damara Belt
contains Neoproterozoic...1983, 2008). The succession constitutes the Pan-African Kaoko and
Damara belts (Fig. 1A; e.g., Hanson,...links with the Kaoko Belt along a structurally
complex zone that is well-exposed southwest of Khorixas...deformed
and
PT
metamorphosed during the Pan-African tectonic events. The sequence for the
CE
closure...Paleozoic
1992; Blanco et al., 2011).
ED
Pan-African Orogeny (e.g., Hoffmann, 1990; Kukla and Stanistreet | 👁 Image
| Tack, L., Wingate, M.T.D., De Waele, B., Meert, J., Belousova, E., Griffin, B., Tahon, A., Fernandez-Alonso, M. (2010) The 1375Ma “Kibaran event” in Central Africa: Prominent emplacement of bimodal magmatism under extensional regime. Precambrian Research, 180 (1) 63-84 doi:10.1016/j.precamres.2010.02.022 | Journal (article/letter/editorial) | | belt trending NE
over 1300 km across the Central African Congo craton, from the Angola-Zambia-D.R.Congo...processes have intra-plate characteristics and are thus not associated with normal plate
boundary processes...fieldwork has been conducted in this
structurally complex DRC region (Walemba, 2001; Rumvegeri et
al., 2004;...Klerkx et
al. (1984, 1987).
The world-scale Central African Sn–Nb–Ta–W and Au metallogenic province, which...S-type granitoids, spaced in time at c. 1330 Ma (granite ‘Gr1’; type-massif:
Rumeza; extensional, early-orogenic | 👁 Image
| | Journal (article/letter/editorial) | | Sill
6
Korosten Pluton
7
Dubawnt Group
8
Jan Lake Granite
9
Frere Formation
10
Elgee-Pentecost Formations...Chaya Dyke 1 VGP
22
Chaya Dyke 2 VGP
23
Angara-Kan Granite VGP
24
Ulkan Granitea
25
Elgetei Formationa
NAC...(◦ N)
Plong (◦ E)
A95 (◦ )
Reference
63
Kunene Complex
Con
1385–1375
−3.0
255.0
17.4
Piper (1974)...
1270 Ma
Post-Jotnian Intrusions
64
65
Nain Anorthosite
66
Mackenzie Dykes
67
Sudbury Dykes
68
Kungnat...continents have travelled together as parts of a single plate, they
should have identical APWPs. In the absence | 👁 Image
| | Report (article/chapter) | | P--T-time history and thermal modelling of an
anorthosite-granulite interface, Eastern Ghats metamorphic...synthesis and a thermal model are presented for the anorthosite-massif-granulite interface near Bolangir, Orissa...the Eastern Ghats metamorphic belt. While the anorthosite pluton can be
shown to have been forcefully intruded...Parameterized model calculations suggest that a
noritic anorthosite pluton of 7.5 and 10 km radius with 50% initial...of the heat
conduction from the equilibrated anorthosite-granulite interface suggest that for some
combinations |
|
