 | | Journal (article/letter/editorial) | | :The PRE-CAMBRIAS and ASSOCI3~TED ROCKS of the DISTRICT of MOZX)IBIQUE. By ARTHUR HOLMES, A.R.C.S., F...Mountains. (d) The Nrassi Basin. (e) Fort Chinga District. (f) West of "Ribawe. (g) General Sequence and... . . . . . . . . . . . . 76 (1) Biotite- and Muscovite-Granites. (2) Graphic Granite and other Quartz-Felspar...the Granulitic Granites. XI. The Origin of the Inselberg Landscape . . . . . . . . . . . . . . . . . ....the neighbourhood of the mouth of the Lurio, the district around Memba, and the central coastal region between |  | | Journal (article/letter/editorial) | | in Namaqualand and Bushmanland is of an arid inselberg to mountainous landscape with well-exposed pink...Figure 4). The image is fairly typical of the inselberg landscape under discussion and illustrates that...be the oldest granitoid in the Bushmanland ore district, the Aroams gneiss, has now been dated at 1204...structure). The scale from left to right of the inselberg is ~1.6 km and the structure dips shallowly to...conglomerate, quartz-muscovite schist, felsic gneiss. Formation Koeris Upper member: Quartz-muscovite schist with |  | | Journal (article/letter/editorial) | | Hoogoor and Aroams Gneisses, in the Aggeneys District, the site of major world-class Broken Hilltype...a similar tectono-magmatic event in the Okiep District in Namaqualand to the west and to similar aged...Namaqua-Natal Belt. During this period the Aggeneys District was subjected to peak prograde M2 amphibolite...metamorphic overgrowths also found in the Okiep District in Namaqualand to the west. Unlike Namaqualand...Namaqualand and Natal, however, the Aggeneys District was not subjected to extensive magmatism at this time, and |  | | Book | | Shanghai Taipei Toronto With offices in Argentina Austria Brazil Chile Czech Republic France Greece Guatemala...inselbergs in the Central Namib Desert Domed inselberg in Kerala, India Group of closely spaced domes...a block-strewn inselberg, or nubbin, Mojave Desert, California Castellated inselberg defined by an orthogonal...Dilatation operating on the slope of the domed inselberg of Mirabib, Central Namib Desert 118 119 128...weathering pit, Erongo, Namibia Tafoni on a boulder inselberg, Mojave Desert, California Big tafone cut into |  | Diener, Johann F.A., White, Richard W., Link, Klemens, Dreyer, Tanya S., Moodley, Adam (2013) Clockwise, low- metamorphism of the Aus granulite terrain, southern Namibia, during the Mesoproterozoic Namaqua Orogeny. Precambrian Research, 224. 629-652 doi:10.1016/j.precamres.2012.11.009 | Journal (article/letter/editorial) | | syn-tectonic Kubub and Aus gneisses. 3. The Festung inselberg 2. Regional geology The NMC contains mid- to...on a 16 km2 area centered around the Festung inselberg, about 20 km west of the town of Aus (Fig. 1)...core of the synform on the eastern side of the inselberg (Fig. 1). Metapsammitic gneisses are medium-grained...Fig. 1. Simplified geological map of the Festung inselberg, Aus granulite terrain. Inset map shows the position... Field photographs of rocks from the Festung inselberg. (a) Coarse-grained aluminous metapelite gneiss |  | Tenczer, V., Hauzenberger, Ch., Fritz, H., Hoinkes, G., Muhongo, S., Klötzli, U. (2013) Crustal age domains and metamorphic reworking of the deep crust in Northern-Central Tanzania: a U/Pb zircon and monazite age study. Mineralogy and Petrology, 107 (5) 679-707 doi:10.1007/s00710-012-0210-1 | Journal (article/letter/editorial) | | Department of Earth Sciences, University of Graz, Graz, Austria e-mail: tenczer@uni-graz.at S. Muhongo University...Lithospheric Resarch, University of Vienna, Vienna, Austria Introduction The Maasai Steppe in Northern Tanzania...40Ar/39Ar data (Reddy et al. 2004) of biotite and muscovite derived from the Craton margin and Usagaran Belt...margin of the Western Granulites as inferred from muscovite bearing lithologies. The timing and intensity...geochronology. These are firstly, the large spectacular inselberg mountains (domes) with meta-igneous basement of |  | | Journal (article/letter/editorial) | | of about 4 x 4 km centered around the Festung inselberg, 77 about 20 km west of the town of Aus (Fig...Powell, 1998), orthopyroxene (White et al., 2002), muscovite–paragonite 127 (Coggon and Holland, 2002), ...far the most fertile rocks as they undergo both muscovite- 158 and biotite-breakdown melting reactions...increase in melt content at 670–680 ◦ C due to muscovite-breakdown melting, and a further 160 sharp increase...Gneiss near the northern and southern ends of the inselberg, with a 190 third, larger zone in the southern |  | Ige, Olugbenga, Adeyemi, Chinyere, Ogunfolakan, Adisa, Ayansola, Abel, Olayemi, Ayodeji, Taiwo, Yetunde, Olayiwola, Moshood, Oyelade, Joshua (2011) An Inventory of the Geological, Biological and Cultural Resources on Ufe-Oke Hill, Idanre, Southwestern Nigeria. Natural Resources, 2 (3) 180-190 doi:10.4236/nr.2011.23024 | Journal (article/letter/editorial) | | 4(a)). The Older porphyritic granite occurs as inselberg and is the major rock type in this area. The term...the Older Granite suite in the study area. An inselberg, according to Durotoye (1976), is developed on...2011 SciRes. 183 ment complex rocks. Similar inselberg was reported by Durotoye [14] in Isan-Ekiti where...slope initiate rock- boulder landslide. Another inselberg terrain similar to that of Idanre (study area)...Plagioclase ~ 5%, Biotite ~ 2%, Amphibole ~ 1%, Muscovite ~ 0.09% and Opaque ~ 0.5% (see also Table 1). |  | Taylor, Cliff D., Finn, Carol A., Anderson, Eric D., Joud, M. Y., Taleb, M. A., Horton, John D. (2015) Algoma-, Superior-, and oolitic-type iron deposits of the Islamic Republic of Mauritania (phase V, deliverable 83): Chapter O in Second projet de renforcement institutionnel du secteur minier de la République Islamique de Mauritanie (PRISM-II). Open-File Report Vol. 2015 (2013-1280) US Geological Survey doi:10.3133/ofr20131280o | Report (issue) | | terrane, and (4) the Saouda Group of the Inchiri district. Neoarchean Algoma-type BIF is present in the...Eizzene and Oumachouema Groups of the Inchiri district, (6) the Ijibbitene Group of the Ijibbitene massif........................... 48 5.2.5 The Inchiri district.................................................(quartzite in lower member) and DB07RIM-46b (muscovite schist in lower member for Ar/Ar). USGS photo...Formation, blocky quartzite interbedded with muscovite schist. Location of sample CT07RIM33-2. Also location | | | Report (issue) | | terrane, and (4) the Saouda Group of the Inchiri district. Neoarchean Algoma-type BIF is present in the...Eizzene and Oumachouema Groups of the Inchiri district, (6) the Ijibbitene Group of the Ijibbitene massif........................... 48 5.2.5 The Inchiri district.................................................(quartzite in lower member) and DB07RIM-46b (muscovite schist in lower member for Ar/Ar). USGS photo...Formation, blocky quartzite interbedded with muscovite schist. Location of sample CT07RIM33-2. Also location | | | Report (issue) | | sand that occur as aprons on mountain-front and inselberg piedmonts where source terrane consists of Cretaceous...rock typically underlies pediments adjacent to inselberg and range-front escarpments, whereas saprolite...comprising (a) schistose garnet-sillimanite/andalusite-muscovite-biotite-quartz-feldspar pelitic gneiss, (b) compositionally...staurolite, plagioclase, and K-feldspar, biotite, and muscovite, (c) bluish gray siliceous granofels consisting |  | | Journal (article/letter/editorial) | | studyof theexploiteddeposits of the Kediat Tiris district(localityC. Fig. 1) of Mauritaniaand the SaharaOccidental(Rio...sameage. 1974, 1975). In the easternpart of that district, nearF'Derik (formerlyFort-Gouraud),formations...the GuelbE1 Hamariatandformsthe majorpart of of muscovite quartzprovedthat this brecciais the productof...Tazaditunits. Westward,thesemicaschists • Guelb= inselberg (arabic terminology). = Gleib = small guelb....+ are more or less rich in muscovite and biotite and biotite + muscovite+ almandine-richgarnet -----staucontain |  | Ustaszewski, Kamil, Schmid, Stefan M., Lugović, Boško, Schuster, Ralf, Schaltegger, Urs, Bernoulli, Daniel, Hottinger, Lukas, Kounov, Alexandre, Fügenschuh, Bernhard, Schefer, Senecio (2009) Late Cretaceous intra-oceanic magmatism in the internal Dinarides (northern Bosnia and Herzegovina): Implications for the collision of the Adriatic and European plates. Lithos, 108 (1) 106-125 doi:10.1016/j.lithos.2008.09.010 | Journal (article/letter/editorial) | | Croatia Geologische Bundesanstalt, A-1030 Wien, Austria d Département de Minéralogie, CH-1205 Genève, Switzerland...Geologisch-Paläontologisches Institut, A-6020 Innsbruck, Austria b c a r t i c l e i n f o Article history: Received...Pre-Neogene rocks cropping out in the Papuk–Psunj inselberg belong to the Tisza Mega-Unit. This is characterised...presently unknown (see Šparica et al., 1980). The inselberg of Motajica (Fig. 2) is characterised by a Late...this metamorphic event (Krenn et al., 2008). The inselberg of Prosara exposes a lower tectonic unit in the |  | Bailie, R., Armstrong, R., Reid, D. (2007) The Bushmanland Group supracrustal succession, Aggeneys, Bushmanland, South Africa: Provenance, age of deposition and metamorphism. South African Journal of Geology, 110 (1) 59-86 doi:10.2113/gssajg.110.1.59 | Journal (article/letter/editorial) | | studies have been undertaken on the Cu-rich Okiep District of the western Namaqua Province (Clifford et ai...Group (Moore, 1977; Watkeys, 1986). The Aggeneys District has been subjected to three major metamorphic...granulite facies grade rocks to the west in the Okiep District (Waters, 1989; Willner. 1995), Stratigraphic Nomenclature...The complex structural pattern of the Aggeneys District has led to difficulties in correlating stratigraphic...the Pb-Zn-Cu-Ag mineralisation in the Aggeneys District consists predominantly of aluminous schists interspersed |  | | Journal (article/letter/editorial) | | deposit towards the eastern part of the Gamsberg inselberg. The barite occurs as massive to laminated layers...The four deposits in the Aggeneys-Gamsberg ore district SOUTH AFRICAN JOURNAL OF GEOLOGY, 2005, VOLUME...ore district within the Namaqua Province. (b) Geological map of the Aggeneys-Gamsberg ore district showing...schist pinches out as a pyritic quartzsillimanite-muscovite schist and underlies the unit of massive to laminated...out as pyrite-rich but sphalerite-poor quartz-muscovite-sillimanite schist that underlies the barite ore | | | Report (issue) | | includes small fans at base of Cougar Buttes inselberg and active wash deposits where they are not mapped...sand that occur as aprons on mountain-front and inselberg piedmonts. Thickest where buttress against inselbergs...tz-feldspar layered gneiss with interlayered muscovite-biotite±sillimanite±garnet pelitic gneiss, quartzite |  | Smith, C.B., Sims, K., Chimuka, L., Duffin, A., Beard, A.D., Townend, R. (2004) Kimberlite metasomatism at Murowa and Sese pipes, Zimbabwe. Lithos, 76 (1) 219-232 doi:10.1016/j.lithos.2004.03.009 | Journal (article/letter/editorial) | | around Murowa and Sese form a striking series of inselberg domes up to 250 m high, attesting to stripping...modal proportion. Minor quantities of biotite and muscovite (6.5 modal %) are present and there is accessory...potash feldspar (K-spar), oligoclase (Oligo), muscovite (Musc), aegirine – augite (Aegir), riebeckite...likelihood of postemplacement erosion. (viii) the inselberg landscape developed on the granite and the relic | | | Report (issue) | | derived from crystalline rock of the Mt. 15 Eden inselberg as well as material derived from the underlying...associated with faulting and uplift of the Mt. Eden inselberg. In the San Jacinto Valley, alluvial bodies of...Vincent Thrust (mainly greenstone but also minor muscovite schist), and granitoid and gneissic rocks of San...formation; the latter appears to have formed a low inselberg against which the sedimentary deposits of Live...granitoid rock of unit Ktlc that formed a local inselberg (island mountain) rising above the floodplain; |  | | Journal (article/letter/editorial) | | carbonatite complex forms a circular, 3km diameter, inselberg rising 600m above the desert plain of the pre-Namib...that can be distinguished petrographically from muscovite only by its pseudo-uniaxial character and slightly...alumina-poor composition in complex taeniolite - muscovite - phlogopite solid solutions, taeniolite occurs...to physical interlayering of taeniolite with muscovite, or even biotite, especially in rocks like the...metasomatic taeniolite and relic, metamorphic muscovite and biotite occur together. However, in other |  | | Report (issue) | | lesser amounts of quartzite, marble, gneiss, and muscovite granite Tct Tuff, tuffaceous sandstone, and...Woman Mountains Granodiorite and more rarely from muscovite granite 13 Tp Peach Springs Tuff of Young and...Hornblende andesite (early Miocene)~Forms an isolated inselberg near the north edge of the map area; another present...dikes and pegmatite dikes at the margins contain muscovite. A porphyritic facies, which contains phenocrysts...veined gneiss, pegmatitic gneiss, augen gneiss, muscovite granite gneiss, amphibolite, micaceous schist |  | | Report (issue) | | scale to the north of Rossing Siding, Swakopmund District (Martin, 1965). The mineral has also been reported...Marmor Pforte 37, Swakopmund District. On Neuhof 100 in the Maltahohe District, amazonite is found in granitic...the homestead on the farm Donkerhuk 91, Karibib District (DeKock, 1935; Biirg, 1942). Forming the crest...quartz and cleavelandite as major constituents, muscovite, with black tourmaline, beryl and garnet as...due north of Rossing Siding in the Swakopmund District (Wagner, 1916; Reuning, 1923; Biirg, 1942; Martin |  | | Journal (article/letter/editorial) | | K feldspar, plagioclase, quartz, biotite and muscovite (Fig. 3a) (Galliski and Márquez-Zavalia, 2011;...Argentine counterparts, tabular barren quartz-muscovite-feldspar pegmatites do not stand out as reefs...Beurlen et al, 2011). In Mozambique the Alto Ligonha District (Zambezia Province) is synonymous with one of...quartz-tourmaline pegmatites in the chlorite-talc schists and muscovite-biotite schists from Zambia nor the vein-type...(REE)-Be-Nb/Ta pegmatite from the Alto Ligonha District, Zambezia Province, Mozambique, is surrounded |  | | Report (issue) | | IX Gentle incision near Centenary • •1 X The inselberg Mangurgwe rises above the Pliocene pediplain,...occur in the Zambezi Valley and in the Chipinge District, and other less severe movements have been recorded...cycle at lower level. 4 THE PROCESSES INVOLVED inselberg —^ Scarp retreat FIG. 5a. Diagrammatic section...successive base-levels. v——- v v. i—»v f Inselberg FIG. 5b. Diagrammatic section showing the progressive...of fossiliferous sediits occur, as in the Gweru District, the fossil surface is designated •Karoo, although |  | | Journal (issue) | | mine in the Te6filo Otoni-Marambaia pegmatite district of Minas Gerais. As is common with most aquamarines...feldspars (microclinel plagio~lase)~ quartz! micas (muscovite, biotite)! and on occasion some common accessory...Quartz Plagioclase Muscovite Biotite Minor phases Microcline Quartz Albite Muscovite Microcline Quartz...Quartz Albite Muscovite Beryl Tourmaline Apatite Garnet Beryl Tourmaline Apatite Garnet Spodurnene Rhodizite...zones: quartz-microcline-muscovite Wall zone: quartz-plagioclase-microcline-muscovite-biotite Intermedate |  | | Report (issue) | | textures. Magnetite fluorite zircon ±(allanite) ± (muscovite) Saussurite (iron oxide) ±(chlorite) ±(sericite)...area for the monzogranite is the crescent-shaped inselberg, 8.5 km south of the northwestern corner of the...a flow-foliated, felted groundmass. Apatite, muscovite, and fluorite are accessory minerals. Apatite...km wide. The core area, underlying the large inselberg of Jabal Khashmadheeb, consists of two semiring...across, about 20 percent knots of fine-grained muscovite, and dispersed, prismatic crystals of brannerite |
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