| | Journal (article/letter/editorial) | Etendeka Volcanism of the Goboboseb Mountains and Messum Igneous Complex, Namibia. Part I: Geochemical Evidence...REVISED TYPESCRIPT ACCEPTED JULY 30, 1997 The Goboboseb Mountains and Messum Complex represent a major Cretaceous...lower sequence of mafic lavas, followed by the Goboboseb quartz latite members, the Messum Mountain Basalts...Energy, P.O. Box 2168, Windhoek 9000, Republic of Namibia. ‡ Present address: Research School of Earth Sciences...lavas are inferred to have been erupted from the Goboboseb–Messum Centre. Chemically, the LTZ.H melts are | | 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 | | | Journal (article/letter/editorial) | Etendeka Volcanism of the Goboboseb Mountains and Messum Igneous Complex, Namibia. Part II: Voluminous Quartz...REVISED TYPESCRIPT ACCEPTED JULY 30, 1997 The Goboboseb–Messum volcanic centre is the source of two voluminous...voluminous silicic eruptive sequences, the Goboboseb quartz latites (Units I–III), and the Springbok quartz...Parana´ suggests eruptive volumes of ~2320 km3 (Goboboseb units) and 6340 km3 (Springbok unit). The latter...to pigeonite ± hypersthene, the assemblages changing progressively from the Goboboseb unit through to | | | 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...forsteritic macrocrysts is cut by the 131 Ma Brandberg plutonic complex. Forward and inverse modelling...lithosphere thickness beneath and adjacent to NW Namibia, and there was intense melting ( Tp = >1500–1700°C)...WORDS: dykes; crustal contamination; mantle plume; Namibia; picrites INTRODUCTION The extent to which decompression | | | 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 | | | Book | Republic, 6 cm). Figure 1.2 Halite crystals (Namibia, 5.8 cm). 6 section devoted to the display of...in groups 8–12, show marked deviation. In this region of the Periodic Table, electronegativity increases...bonded substances, the electrons are confined to the region between the nuclei of the bonded atoms and they...Fluorite showing stepped, cubic crystal faces (Erongo, Namibia, 5.8 cm). hence occurs less commonly. Figure...(left, 6 cm) and grossular garnet (both from Kayes region, Mali); (C) grossular (Jeffrey mine, Canada, 5 | | | Journal (article/letter/editorial) | stratigraphy at the local scale are rare in this region. The flow-by-flow mapping performed in southern...resolution of the lava stratigraphy within a restricted region in the south hinge of Torres Syncline (TS), which...present-day configuration of lavas along the studied area. This study is the first attempt to record the geochemical...elliptical shape with an N–S direction covering an area of 917,000 km2 in central to eastern South America...1997). The Gondwana III Supersequence covers an area of more than 1,500,000 km2 in Brazil, Paraguay, | | | Report (issue) | 4IJArf39Ar geochronology from the Sangre de Cristo Mountains, south-central Colorado and northern New Mexico...Valente 159 II. Volcanic passive tnlll'gin of Namibia: A B. Corner, J. Canwright, and R. Swan pote~tialfields...normal asthenosphere provide an appropriate source region? Is the lower continental lithosphere wet enough...in these margins by oil and ga companie . Future area of interest include the nature of the lithosphere-asthenosphere...magmatic hiatus, erosion of newly formed rift mountains, and the formation of high-velocity lower crust | | Sarmento, Carla Cecília Treib, Sommer, Carlos Augusto, Lima, Evandro Fernandes, Barreto, Carla Joana Santos, Rossetti, Lucas, Lafon, Jean Michel (2021) Mafic subvolcanic intrusions from the southern
Paraná‐Etendeka
Large Igneous Province, Brazil: Insights from geochemistry and
Sr–Nd–Pb
isotopes. Geological Journal, 56 (2). 1143-1166 doi:10.1002/gj.3993 | Journal (article/letter/editorial) | et al., 2014, 2018; Val- also occur in western Namibia including the Henties Bay-Outjo ente et al., 2007;...basic with gramado lavas in the southeast outcrop area (Peate, intrusions and its correlation with the...fields formed of multiple from the central-eastern region of Rio Grande do Sul State; (b) to lobes of basalt...relationship the most primitive compositions in the area (>5 wt% MgO), and by between dikes of the Paraná...stratigraphy (Torres and Vale do in western Africa, in Namibia and Angola (Jerram et al., 2019; Sol formations) | | | Journal (article/letter/editorial) | anorthosites can be classified into two main types: (1) hypersthene-dominant granitoids, i.e. quartz mangerites (Opx... Previous experimental studies relevant to this area (Vander Auwera & Longhi, 1994; Vander Auwera et...geological map of southern Norway [inset shows the area of the Sveconorwegian orogen (in grey); B-K, Bamble–Kongsberg...of Al2O3 (XAl2O3) in the melts. The grey shaded area corresponds to the Al2O3 contents of the natural...amphibole compositions are depicted by the shaded area. minerals in the matrix. Tables 6–8 show that the | | 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...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...eruptions (Tonga–Kermadec volcanic arc; the source region) with many volcanic products shed into the ocean | | Choudhary, Babita R., Ernst, Richard E., Xu, Yi-Gang, Evans, David A.D., de Kock, Michiel O., Meert, Joseph G., Ruiz, Amarildo S., Lima, Gabrielle A. (2019) Geochemical characterization of a reconstructed 1110 Ma Large Igneous Province. Precambrian Research, 332. 105382 doi:10.1016/j.precamres.2019.105382 | Journal (article/letter/editorial) | Moabi et al., 2017), and also in the MidContinent region of North America (Keweenawan LIP) (Heaman et al...dated NW-NNW trending Epembe dykes of northern Namibia as a single Huila-Epembe swarm, as well as an approximately...Huanchaca Suite intrude the Aguapeí Group in a region not 7 affected by the deformation and metamorphism...ultramafic, and alkaline intrusions in the Lake Nipigon region at 1115–1110 Ma was followed by a major pulse of...Grunehogna terrane of Antarctica also contains a region in Dronning Maud Land with 1110 Ma LIP magmatism | | | Journal (article/letter/editorial) | The Bunbury Basalt, although only covering a small area in the Cape Naturaliste–Cape Leeuwin Peninsula,...discoveries in the West Musgrave and in the Kimberley region, the LIPs in these regions have good mineral potential...2–54 2.4. 1.8–1.7 Ga Hart-Carson LIP, Kimberley region . . . . . . . . . . . . . . . . 2.4.1. Carson Volcanics...the Central Atlantic Magmatic Province (estimated area of ca. 7 × 106 km2), the Ontong Java oceanic plateau...Australia; those discussed in this paper are underlined. Region or tectonic unit Event number in Table 1 of Ernst | | 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... Iran ABSTRACT ARTICLE HISTORY The Roshtkhar area is located in the Khaf-Kashmar-Bardaskan volcano-plutonic...subvolcanic rocks occurring mainly as dikes in the area, which intruded into Cenozoic intrusive rocks. We | | | Book | Africa 194 3.5.2. The Damaraland alkaline province, Namibia 198 3.5.3. Carbonatites 199 3.5.4. Kimberlites...metamorphism in the Central Zone ofthe Damara Orogen, Namibia 6.3.2. Anorogenic metamorphism in the eastern Pyrenees...that metals, oxides and silicate dominated in the region between Mercury and the asteroid belt. Details...crystallographic axes will aceeierate in the given region, thereby providing another way of mapping out hot...other of the above cases dominating in a given region. More recently, measurements of crustal Poisson's | | | Book | papers and 19 geological maps in Western Australia, Namibia and Greenland. Throughout his career, which has...Nova Scotia, Canada . 4.3.9 The Brandberg West Greisen Vein Systems, Namibia . . 4.3.10 The Kalguta Mo-W-Be-Bi.... . . . . . . . . . . . . . . 6.5.1 Navachab, Namibia. . . . . . . . . . . . . . . . . . . . . . . ....Cu Deposits of the Matchless Amphibolite Belt, Namibia . . . . . . . . . . . . . . . . . . . . . . . 7...Pb-Zn-Cu-Ag-V Deposits of the Otavi Mountain Land, Namibia . . . . . . . . . . . . . . . . . . . . . . . | | Ngonge, Emmanuel Donald, de Hollanda, Maria Helena Bezerra Maia, Archanjo, Carlos José, de Oliveira, Diógenes Custódio, Vasconcelos, Paulo Marcosde Paula, Muñoz, Patrício Rodrigo Montecinos (2016) Petrology of continental tholeiitic magmas forming a 350-km-long Mesozoic dyke swarm in NE Brazil: Constraints of geochemical and isotopic data. Lithos, 258. 228-252 doi:10.1016/j.lithos.2016.04.008 | Journal (article/letter/editorial) | NU emplaced as linear sets of dykes covering an area of approximately 12,500 km2 (Fig.1) marking the...processes led to the break-up of this major continental area, especially from the Early Jurassic to the Late...tholeiites which are typically confined to the western region. ED On the basis of the dataset presented in...olivine (olivine tholeiites), three are olivine-hypersthene normative, with the most mafic 10 ACCEPTED...The fourth olivine tholeiite sample is quartz-hypersthene normative as well as all the samples of the two | | ZARTMAN, ROBERT E., KEMPTON, PAMELA D., PACES, JAMES B., DOWNES, HILARY, WILLIAMS, IAN S., DOBOSI, GÁBOR, FUTA, KIYOTO (2013) Lower-Crustal Xenoliths from Jurassic Kimberlite Diatremes, Upper Michigan (USA): Evidence for Proterozoic Orogenesis and Plume Magmatism in the Lower Crust of the Southern Superior Province. Journal of Petrology, 54 (3) 575-608 doi:10.1093/petrology/egs079 | Journal (article/letter/editorial) | with seismic estimates of crustal thickness in the region. The granulites can be divided into two groups...GEOLOGIC A L S ET T I NG The Superior Province is a region of Archean and Proterozoic rocks that forms part...Midcontinent rifting event have strongly affected the region. Thus, the Michigan xenoliths provide us with useful...of Michigan and adjacent Wisconsin (Fig. 1). The region includes the interface between the Archean Superior...two further major magmatic events affected the region. The Pembine^Wausau arc terrane was intruded by | | | Report (issue) | authors also consider the mineral deposits of the region, indicating their spatial and temporal association...quite clearly that southern México is a complex region with a stratigraphic record that begins in the...Middle America and the Gulf of Mexico-Caribbean Sea region during Mesozoic time: Geological Society of America...carpet of the Sierra Madre Occidental covers an area of ~300,000 km2 (McDowell and Keizer, 1977; McDowell...W E Boundary between area with east or west tilting of rocks Limit of area affected by Tertiary extension |
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