 | | 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...intrusive complexes in Namibia belong to the bimodal Paraná–Etendeka Large Igneous Province and comprise...the Gross Spitzkoppe, Klein Spitzkoppe, Erongo, Brandberg, Messum, Cape Cross, and Paresis complexes. The |  | 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...V. All rights reserved. 1. Introduction Large Igneous Provinces on continental crust (continental flood |  | 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...2005 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...formation of the Paraná–Etendeka Igneous Province and the first stages of the South Atlantic Ocean rifting...mafic and felsic rocks of the Paraná–Etendeka Igneous Province. Decompression melting of the lower crust |  | | Journal (article/letter/editorial) | | differentiated members of the alkaline series: the Messum complex, Namibia S. B. BLANCHER1,2,*, P. D’ARCO1,2, M. FONTEILLES1...characterized from the alkaline series of the Messum complex in which nepheline occurs in a succession of...trend, several high-silica nephelines from the Messum rocks as well as from other reported occurrences...chemical composition, alkaline magma series, Messum complex, Namibia. Introduction NEPHELINE, the most common...Ne75Qz25 Ne50An50) is represented by the shaded area. Its intersection with the basal plane corresponds |  | | Journal (article/letter/editorial) | | silicic volcanic units of the Paraná-Etendeka Large Igneous Province (LIP) have a high volume (~20,000 km³)...the Grootberg and Wereldsend quartz latites of Namibia, but the much higher Pb contents of the Namibian...High-temperature silicic volcanism; Paraná-Etendeka Large Igneous Province; Fractional crystallization ACCEPTED...a total volume estimated to exceed 1 Mkm³ and an area greater than 1.2 AC Mkm³ (Peate, 1997). Most of...volcanic rocks occuping approximately 2% of this area. The latter have unusually high temperatures, >1000°C |  | | Journal (article/letter/editorial) | | intrusives with and without associated carbonatite, Namibia B. Bühn a,b,*, R.B. Trumbull c a Institut fur...suites from the Cretaceous Damaraland igneous province (Namibia), one with and one without associated...terms of magma source and evolution. The Etaneno complex occurs in close spatial proximity to the Kalkfeld...Kalkfeld bimodal carbonatite – alkali silicate complex, and is dominated by nepheline (ne)-monzosyenites and...Ijolite; Nepheline foidite; Nepheline syenite; Namibia * Corresponding author. Instituto de Geociências |  | | Journal (article/letter/editorial) | | crustal contamination in the Okenyenya igneous complex, Namibia I13MA A. MARTINEZ,J CHRIS HARRIS,j'* ANTON...Energy, Geological Survey, P.O. Box 2168, Windhoek, Namibia (Received August 9, 1995; accepted in revised...types from the 130 Ma Okenyenya igneous complex of northwestern Namibia. These rock types include a tholeiitic...monzodioritic body was the earliest to crystallize in the complex and this was followed by relatively uncontaminated...geochemistry of one of the anorogenic complexes of the area in detail. Second, to determine the effect of crustal |  | | Book | | AiAiba / farm Anibib 136 8 Grosse Spitzkoppe, Erongo 9 , .,/, loringa tree . Khomas Highland...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 |  | | Journal (article/letter/editorial) | | Volcanism of the Goboboseb Mountains and Messum Igneous Complex, Namibia. Part II: Voluminous Quartz Latite...TYPESCRIPT ACCEPTED JULY 30, 1997 The Goboboseb–Messum volcanic centre is the source of two voluminous...as plugs and a laccolith peripheral to the Messum Complex. The recognition of correlatives of these quartz...and Energy, P.O. Box 2168, Windhoek, Republic of Namibia. ‡ Present address: Research School of Earth Sciences...system. KEY WORDS: Quartz latite; AFC processes; Namibia; crustal fusion; Tristan plume INTRODUCTION Volcanic |  | Harris, Chris, Mulder, Kwenidyn, Sarkar, Saheli, Whitehead, Benjamin, Roopnarain, Sherissa (2018) Petrogenesis of low-δ18O quartz porphyry dykes, Koegel Fontein complex, South Africa. Contributions to Mineralogy and Petrology, 173 (4) doi:10.1007/s00410-018-1457-2 | Journal (article/letter/editorial) | | low-δ18O quartz porphyry dykes, Koegel Fontein complex, South Africa Chris Harris1 · Kwenidyn Mulder1...associated with the 144–133 Ma Koegel Fontein Igneous Complex, which was intruded during the initial phase... up to 15 m in width, strike NW–SE across the complex. The QP dykes that intruded outside the granite...approximately 50% oxygen. It is generally accepted that igneous rocks that formed from magmas with δ18O values...rocks with elevated δ18O. (Taylor 1968, 1987). Igneous rocks that formed from magmas with δ18O magmas |  | KIRSTEIN, LINDA A., PEATE, DAVID W., HAWKESWORTH, CHRIS J., TURNER, SIMON P., HARRIS, CHRIS, MANTOVANI, MARTA S. M. (2000) Early Cretaceous Basaltic and Rhyolitic Magmatism in Southern Uruguay Associated with the Opening of the South Atlantic. Journal of Petrology, 41 (9) 1413-1438 doi:10.1093/petrology/41.9.1413 | Journal (article/letter/editorial) | | evolved rock types towards the margins of such an area of plume-related magmatism. The mafic lavas are...the less voluminous Etendeka volcanic field of Namibia, which formed a single continental flood basalt...erupted during the Early Cretaceous. This large igneous province is linked to the Tristan mantle plume...widely scattered in Brazil, Paraguay, Angola and Namibia (Gibson et al., 1995; Milner et al., 1995). ∗Corresponding...vicinity of sampling. The volcanic rocks from the area to the east of Alferéz, and as far north as Treinte |  | | Journal (article/letter/editorial) | | online 07 May 2020 Keywords: Koegel Fontein Igneous complex Fluid infiltration 18 O-depletion Shear zone...b s t r a c t The 144–133Ma Koegel Fontein Igneous Complex is notable for the high proportion of magmatic...anomalously low δ18O values from the Koegel Fontein igneous complex, located 350 km N of Cape Town (Fig. 1). The...Kotzesrus CHK76 CHK123 Koegel Fontein Cape Town Complex have whole-rock and mineral δ18O values ranging... such as during global glaciation. In the study area, deformed diamictites are overlain by carbonates |  | | Journal (article/letter/editorial) | | Fenitisation around the Monchique alkaline complex, Portugal N. M. S. ROCK L1THOS Rock, N. M. S. 1976:...1976: Fenitisation around the Monchique alkaline complex, Portugal. Lithos 9, 263-279. Oslo. ISSN 0024-4937...massif The intrusion, shown in Fig. 1, covers an area of some 83 km -~and forms a mountainous backcloth...andalu~site in the vicinity of the intrusion. The igneous rocks consist of nepheline syenites ...widely-separated outcrops in the Oldoinyo Dili carbonatite complex. This extreme variability is shown in irregular |  | | Journal (article/letter/editorial) | | PUESTO LA PEÑA UNDERSATURATED ALKALINE POTASSIC COMPLEX, MENDOZA, ARGENTINA EDUARDO O. ZAPPETTINI§ AND...Early Miocene Puesto La Peña alkaline potassic complex, Mendoza, Argentina, is a multiphase intrusion...that explains the fractionating phases of the complex. Geothermobarometric data and characteristics of...malignite-syenite. The late-stage evolution of the complex involves evolution towards the calcite liquidus...temperature, which is consistent with the model for the complex, considered to represent the root zone of an alkaline |  | | Journal (article/letter/editorial) | | nepheline syenite to granite magmas in the Ditrău Complex, Romania: evidence from O‑, Nd‑, Sr‑ and Pb‑isotopes...Abstract The Ditrău Complex of the Carpathian Mountains in Romania is a Mesozoic igneous complex (~ 200–230 Ma)...continental rift environment. Felsic rocks of the Ditrău Complex consist of nepheline syenite, syenite, quartz syenite...quartz monzonites and granites. Keywords Ditrău complex · Oxygen isotopes · Radiogenic isotopes · Crustal...silica-oversaturated units in the same alkaline complex (e.g., Brotzu et al. 1997). Different models have |  | | Journal (article/letter/editorial) | | rhyolites in the Mesoproterozoic Gawler silicic large igneous province, South Australia Andrea Agangi ∗ , Vadim...Available online 10 April 2012 Keywords: Silicic large igneous province Melt inclusion Rhyolite Fluorine Australia...South Australia form a silicic-dominated large igneous province (the Gawler SLIP) emplaced in an intracontinental...V. All rights reserved. 1. Introduction Large igneous provinces (LIP) are vast amounts of magma erupted..., 1992; Peate, 1997). Silicic-dominated large igneous provinces (SLIP) of similar dimensions to the mafic |  | Zhang, Yi-Shen, Hou, Tong, Veksler, Ilya V., Lesher, Charles E., Namur, Olivier (2018) Phase equilibria and geochemical constraints on the petrogenesis of high-Ti picrite from the Paleogene East Greenland flood basalt province. Lithos, 300. 20-32 doi:10.1016/j.lithos.2017.11.011 | Journal (article/letter/editorial) | | petrogenesis and Ti-content bimodality of lavas in large igneous provinces. We performed phase equilibrium experiments...metasomatism ACCEPTED MANUSCRIPT 1 Introduction Large igneous provinces (LIPs) represent extremely large accumulations...Traps (Ross et al., 2005), the North Atlantic Igneous Province (Saunders et al., 1997), and PT E D...1), emplaced atop pre-Cretaceous rocks over an area of about 65000 km2 (Pedersen et al., 1997): they...of Paleogene flood basalts in the North Atlantic region. Previous studies have shown that North Atlantic |  | Bryan, S.E., Cook, A., Evans, J.P., Colls, P.W., Wells, M.G., Lawrence, M.G., Jell, J.S., Greig, A., Leslie, R. (2004) Pumice rafting and faunal dispersion during 2001–2002 in the Southwest Pacific: record of a dacitic submarine explosive eruption from Tonga. Earth and Planetary Science Letters, 227 (1) 135-154 doi:10.1016/j.epsl.2004.08.009 | Journal (article/letter/editorial) | | to other pumice-forming eruptions from the Tonga region. Most clasts stranded along eastern Australia were...correlate in time and/or space with voluminous silicic igneous events capable of producing N106 km3 of silicic...eruption from any island volcano in the Tonga region, and the pumice was alternatively inferred to be...The southwest Pacific Ocean (Fig. 1) is an ideal area to examine the characteristics and dispersal of...sea-rafted pumice as it is bounded to the east by an area of active (both emergent and submerged) island arc |  | | Journal (article/letter/editorial) | | Proterozoic syenites in the Congo Craton žNtem Complex /, South Cameroon R. Tchameni a,b,1, K. Mezger...can be distinguished in the mostly Archean Ntem Complex of Cameroon: a suite of two-pyroxene syenites and...terrane, thus the deep continental crust of the Ntem Complex itself is the most likely source for the syenite...other syenites worldwide, the syenites in the Ntem Complex do not contain juvenile mantle material, but are...Tchameni et al.r Lithos 57 (2001) 23–42 Ntem Complex. However, this conclusion may not preclude the |  | | Book | | oceanic volcanic 128 island basalts 3.3 Large igneous provinces (LIP): oceanic p1ateaux and continenta1...Africa 194 3.5.2. The Damaraland alkaline province, Namibia 198 3.5.3. Carbonatites 199 3.5.4. Kimberlites...Plumes 6.1 Introduction 6.2 Intracontinenta1layered igneous intrusions 6.3 Anorogenic prograde metamorphism...metamorphism in the Central Zone ofthe Damara Orogen, Namibia 6.3.2. Anorogenic metamorphism in the eastern Pyrenees...layered igneous complexes 8.2.1. The Great Dyke, Zimbabwe 8.2.2. The Bushveld lgneous Complex, South Africa |  | | Journal (issue) | | of this century. During the last few years the region has been re-examined and this work is stiJI being...llimaussaq into two groups : 1) the unslratified complex made up of fairly normal rocks as augite syenite...beds of porphyries. The stratified part of the complex is saucer-shaped. According lo UssING the batholith...especially formed in the most deformed parts of the complex. \\.EG .1A:;:;'s view that essexite, nordmarkite... V. UssING in his classical description of the region-was visited by this eminent geologist in the years |  | | Journal (article/letter/editorial) | | of this century. During the last few years the region has been re-examined and this work is still being...Ilimaussaq into two groups : 1) the unstratified complex made up of fairly normal rocks as augite syenite...beds of porphyries. The stratified part of the complex is saucer-shaped. According to USSIN G the batholith...especiaIly formed in the most deformed parts of the complex. WEGMANN'S view that essexite, nordmarkite and...N.V. USSING in his c1assical description of the region-was visited by this eminent geologist in the years |  | | Book | | springer.com To my wife Foreword The Earth is a complex and dynamic system that over 4.5 billion years...papers and 19 geological maps in Western Australia, Namibia and Greenland. Throughout his career, which has...(GSWA) typed most of the tables, especially the complex ones. Jean Johnston and Chris Hocking performed.... . . . . . . . . . . . . . 1.4.8 The Role of Complex Ions and Ligands in Hydrothermal Fluids . . . .... . . . . . . . . . . . . . . . . . . . 1.4.9 Complex Ions in Hydrothermal Solutions . . . . . . . . |  | | Report (issue) | | Kearns 12. Post-Paleozoic magmatism in Angola and Namibia: A review . . . . . . . . . . . . . . . . . . ...propagation into the southern Tyrrhenian backarc region. . . . . . . . . . . . . . . . . . . . . . . ....Saharan zone, Cameroon volcanic line, Angola and Namibia, and the East African Rift system. This Special...in a schematic lithospheric profile of the Bayuda area includes predominantly granitoids, migmatites, and...studies of xenoliths from the lower crust in the region are from the Arabian plate, where juvenile Neoproterozoic |  | Alizadeh, Elahe, Ghadami, Gholamreza, Esmaeily, Dariush, Ma, Changqian, Lentz, David R, Omrani, Jafar, Golmohammadi, Abbas (2018) Origin of 1.8 Ga zircons in Post Eocene mafic dikes in the Roshtkhar area, NE Iran. International Geology Review, 60 (15) 1855-1882 doi:10.1080/00206814.2017.1396259 | Journal (article/letter/editorial) | | zircons in Post Eocene mafic dikes in the Roshtkhar area, NE Iran Elahe Alizadeh, Gholamreza Ghadami, Dariush...zircons in Post Eocene mafic dikes in the Roshtkhar area, NE Iran, International Geology Review, DOI: 10...zircons in Post Eocene mafic dikes in the Roshtkhar area, NE Iran Elahe Alizadeha, Gholamreza Ghadamia, Dariush...Iron Ore Complex, Mashhad, Khorasan Razavi, Iran ABSTRACT ARTICLE HISTORY The Roshtkhar area is located...subvolcanic rocks occurring mainly as dikes in the area, which intruded into Cenozoic intrusive rocks. We |
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