 | | Report (chapter) | | phases in phlogopite diopsidites and granitic pegmatites from the Tranomaro belt, SE Madagascar; boron-fluid...la Terre, Université de Toliara 601, Toliara, Madagascar 2 Department of Geology, University of Leicester...common in high-grade rocks of the Tranomaro belt in southeastern Madagascar. The mutual occurrence of these...of sinhalite and serendibite associated with phlogopite lenses in metasedimentary diopsidites indicates...emplaced along shear zones on the boundary of the Tranomaro belt. The shear zones acted as conduits for boron-bearing |  | | Journal (article/letter/editorial) | | Fluorine‑controlled composition of biotite in granulites of Madagascar: the effect of fluorine on thermometry of biotite–garnet...of Fe–Mg exchange between biotite and garnet [phlogopite (Phl) + almandine (Alm) = annite (Ann) + pyrope...are ignored. In the granulites of southeastern Madagascar, widespread Mg metasomatism was associated with...regional occurrence of diopside skarns hosting F-phlogopite and thorianite mineralisation. At first, biotite-...thermometry. The reciprocal activity coefficients for phlogopite (λ(Phl)) and annite (λ(Ann)) calculated by the |  | | Journal (article/letter/editorial) | | Ackermand Tectonic framework of the Precambrian of Madagascar and its Gondwana connections: a review and reappraisal...1993/Accepted: 31 January 1994 Abstract The Precambrian of Madagascar is divided into two sectors by the north-west...granulite and high amphibolite facies paragneisses, phlogopite diopsidites, concordant granites and granulites...marbles) of Kibaran age are present in western Madagascar. Two partly greenschist grade sedimentary groups...basement in north-east Madagascar. Isotopic age data suggest the presence in Madagascar of Archaean, Early |  | | Journal (article/letter/editorial) | | Ackermand Tectonic framework of the Precambrian of Madagascar and its Gondwana connections: a review and reappraisal...1993/Accepted: 31 January 1994 Abstract The Precambrian of Madagascar is divided into two sectors by the north-west...granulite and high amphibolite facies paragneisses, phlogopite diopsidites, concordant granites and granulites...marbles) of Kibaran age are present in western Madagascar. Two partly greenschist grade sedimentary groups...basement in north-east Madagascar. Isotopic age data suggest the presence in Madagascar of Archaean, Early |  | Giuliani, Gaston, Fallick, Anthony, Rakotondrazafy, Michel, Ohnenstetter, Daniel, Andriamamonjy, Alfred, Ralantoarison, Théogène, Rakotosamizanany, Saholy, Razanatseheno, Marie, Offant, Yohann, Garnier, Virginie, Dunaigre, Christian, Schwarz, Dietmar, Mercier, Alain, Ratrimo, Voahangy, Ralison, Bruno (2007) Oxygen isotope systematics of gem corundum deposits in Madagascar: relevance for their geological origin. Mineralium Deposita, 42 (3) 251-270 doi:10.1007/s00126-006-0105-3 | Journal (article/letter/editorial) | | isotope systematics of gem corundum deposits in Madagascar: relevance for their geological origin Gaston...d’Antananarivo, Ambohitsaina, BP 906, Antananarivo 101, Madagascar Y. Offant Cerege, Europole Méditerranéen de l’Arbois...Ambaranjana Antanimora, Antananarivo 101, Madagascar ces in Madagascar to provide a gemstone geological identification...characterization. Primary corundum deposits in Madagascar are hosted in magmatic (syenite and alkali basalt)...rocks with the formation of metasomatites such as phlogopite, sakenite, and corundumite. Secondary deposits |  | Boulvais, P., Fourcade, S., Gruau, G., Moine, B., Cuney, M. (1998) Persistence of pre-metamorphic C and O isotopic signatures in marbles subject to Pan-African granulite-facies metamorphism and U–Th mineralization (Tranomaro, Southeast Madagascar) Chemical Geology, 150 (3) 247-262 doi:10.1016/s0009-2541(98)00062-x | Journal (article/letter/editorial) | | metamorphism and U–Th mineralization ž Tranomaro, Southeast Madagascar/ P. Boulvais a , S. Fourcade a a,)...Pan-African granulite-facies metamorphism in Southern Madagascar was examined by means of a mineralogical and...study of marble lithologies. In the granulitic Tranomaro area, which is made up of metasedimentary rocks...demonstrate that fluid circulation has occurred. The Tranomaro marbles can be subdivided into two compositional...Elsevier Science B.V. All rights reserved. Keywords: Madagascar; Granulite-facies; Protoliths; Fluids; Stable |  | | Journal (article/letter/editorial) | | their partitioning into a fluid or a melt. The Tranomaro metasomatized marbles recrystallizing under granulite-facies...elements (Weber et al., 1985). The Tranomaro area in southern Madagascar, probably represent the most demonstrative...1. The Tranomaro pyroxenites 3.1.1. Regional geology The Tranomaro area, southern Madagascar is composed...part of the Tranomaro block (Martelat et al., 1995, 1997). More specifically, the Tranomaro gneiss indicates...found in the Tranomaro block (Rakotondratsima, 1983; Moine et al., 1985). The Tranomaro gneiss comprises |  | | Journal (article/letter/editorial) | | of S-E Madagascar Received: 18 August 1994 y Accepted: 12 October 1995 Abstract In Madagascar, hibonite...formations constituting the S-E part of the Island (Tranomaro area). In these skarns, leucocratic segregations...Université de Tananarive, B.P. 906, Antananarivo, Madagascar B. Moine (✉) Laboratoire de Minéralogie, UA...rocks from Tanzania (Maaskant et al. 1980) and Madagascar (where it was first described by Curien et al...accepted for meteoritic hibonite. Geology In Madagascar the occurrence of hibonite is confined to the |  | | Journal (article/letter/editorial) | | element ŽREE. distribution of marbles from Tranomaro ŽSE Madagascar. shows that the marbles have interacted...Panafrican granulite-facies metamorphism. The Tranomaro area is characterized by an extensive development...earth elements; Fluids; Marbles; Granulites; Madagascar 1. Introduction Anhydrous mineralogical assemblages...information on the source of REE. The Tranomaro area in southeastern Madagascar ŽFig. 1a. consists of a metasedimentary...Fig. 1. Ža. Simplified geological map of the Tranomaro area Žmodified after Boulvais et al., 1998.. Among |  | | Journal (article/letter/editorial) | | Ultrahigh-temperature osumilite gneisses in southern Madagascar record combined heat advection and high rates...orogen Running title: Osumilite from southern Madagascar Authors Robert M. Holder1* Bradley R. Hacker1...(UHT) metapelites of the Anosyen domain, southern Madagascar. The gneisses equilibrated at ~930 °C/0.6 GPa... radiogenic heat production, heat advection, Madagascar This article has been accepted for publication...the Ediacaran–Cambrian Anosyen domain, southern Madagascar, with phase equilibria modelling and monazite+zircon |  | | Journal (article/letter/editorial) | | Tectono-Minerogenetic Unitsof the Basement of Madagascar JEAN CHANTRAINE * AND LUIGI RADELLI** Abstract...defined orogen and to some tectonic basementof Madagascar(Besairie, 1966), but ex- zone of each orogen...article the followingnoteswill suffice. Survey of Madagascar who helped in collecting the data The oro#eniescorrespondto... TECTONO-MINEROGENETIC Fig.1 TECTONIC OF THE OF UNITS OF MADAGASCAR 691 MAP BA3EIV!ENT MADAGA3CAR 200kin LEGEND...4DELLI Fig.2 METALLOGENIC MAP OF THE BASEMENT OF MADAGASCAR LEGEND ß Cu z• Ni(Cu) 0 100 I i 200 |  | Oberti, R., Boiocchi, M., Hawthorne, F. C., Pagano, R., Pagano, A. (2010) Fluoro-potassic-pargasite, KCa2(Mg4Al)(Si6Al2)O22F2, from the Tranomaro area, Madagascar: mineral description and crystal chemistry. Mineralogical Magazine, 74 (6) 961-967 doi:10.1180/minmag.2010.074.6.961 | Journal (article/letter/editorial) | | , KCa2(Mg4Al)(Si6Al2)O22F2, from the Tranomaro area, Madagascar: mineral description and crystal chemistry...amphibole species, has been found in a skarn in the Tranomaro area, Madgascar. The sample used for the description...in size, brownish-black with brownish-yellow phlogopite lamellae adhering to one face of the crystal...optical properties, crystal-structure refinement, Madagascar. Introduction THE X-ray diffraction (XRD) study...formerly labelled as ‘‘richterite’’ from Tranomaro, Madagascar, in the mineralogical collection of Renato |  | | Journal (issue) | | from the Russian Far East Grandidierite from Madagascar Editorial Staff Editor-in-Chief Editors, Lab...Jewish Autonomous District. 266 A New Deposit of Gem-Quality Grandidierite in Madagascar Delphine Bruyère...inclusion in quartz • Inclusions in spinel from Madagascar • Sphalerite in topaz • Tourmaline termination...articles including sapphires from Russia, a new Madagascar deposit of the rare gem grandidierite, Vietnamese...occurrence of the rare gem grandidierite in southern Madagascar and provides a gemological characterization of |  | | Journal (article/letter/editorial) | | the thorianite and sapphire deposits from SE Madagascar B. Moine A. Ramambazafy Lab Min6ralogie, 39...Universit~ d'Antananarivo, BP 906, Antananarivo, Madagascar M. Cuney CREGU, BP23, 54501 Vandoeuvre, France...examples of two metasomatic deposits from S.E. Madagascar document this situation. Thorianite-bearing...granulites from South Madagascar, fluid circulations have produced a lot of phlogopite deposits which are...hosted by synmetamorphic diopside-rich skams. Phlogopite is the only noticeable mineralization within |  | | Journal (article/letter/editorial) | | ultrahigh temperature granulites of southern Madagascar in a polymetamorphic context: implications for...Graphite group and Androyan group in Southern Madagascar, south of the prominent Ranotsara shear zone...Key-words: East African Orogen, Gondwana assembly, Madagascar, metapelite, orthopyroxene-sillimanite-quartz...East (India, Antarctica, Australia, Sri Lanka, Madagascar) and West Gondwana (Africa, South America). Especially...with continental blocks of East Gondwana (e.g., Madagascar, India, Sri Lanka). The subsequent metamorphism |  | | Journal (article/letter/editorial) | | (sakenites) from the type locality in southern Madagascar M. M. RAITH,1 R. RAKOTONDRAZAFY2 AND P. SENGUPTA3...Terre, Université d ÕAntananarivo, Antananarivo, Madagascar 3 Department of Geological Sciences, Jadavpur...of the Sakena river to the NW of Ihosy, south Madagascar. The exposure has been revisited and subjected...bimineralic assemblage was completely replaced by phlogopite and Mg-Al minerals, thereby producing corundum-...rocks; metasomatism; phlogopitites; southern Madagascar; spinelsapphirine coronas. INTRODUCTION Enigmatic |  | | Journal (article/letter/editorial) | | uranothorianite (UTh) from the Tranomaro granulitic skarns (SE-Madagascar) were studied. These structures...the Tranomaro area (Andranomitrohy open pit at 46°33.15′ E, 24°19.97′ S) in South-East Madagascar, metamorphosed...as shown by the widespread occurrence of fluor-phlogopite and fluor-pargasite (Moine et al., 1998; Ramambazafy...inclusions; but spinel, pargasite, plagioclase, phlogopite and zirconolite may also be present. Optical...discussion 6.1. A reasonable history of radiohalos in Tranomaro skarns From petrographical study and damage modeling |  | | Journal (article/letter/editorial) | | high-grade aluminous metapelites of southeastern Madagascar S. D. BOGER,1,2 R. W. WHITE3 AND B. SCHULTE2...granulites from the Anosyen domain of southeastern Madagascar are exposed in three intercalated formations:...existed during orogenesis, which in southern Madagascar is related to the amalgamation of Gondwana (580–520...orogenesis. Key words: ferric iron; granulite facies; Madagascar; metapelite; oxidation state. Abbreviations:...granulite facies metapelitic rocks from southeastern Madagascar. On the basis of their whole-rock chemistry, |  | | Journal (article/letter/editorial) | | ultrahigh-temperature metamorphism in southern Madagascar Robert M. Holder, Bradley R. Hacker PII: DOI:...ultrahigh-temperature metamorphism in southern Madagascar. Chemge (2018), https://doi.org/10.1016/j.chemgeo...ultrahigh-temperature metamorphism in southern Madagascar Robert M. Holdera,b, (corresponding author),...Anosyen (peak T: 900–950°C) domains in M southern Madagascar to evaluate how titanite responds to high-temperature...recrystallization; ultrahigh-temperature metamorphism; Madagascar ACCEPTED MANUSCRIPT 1. Introduction Traditionally |  | | Report (issue) | | The Natural History Museum of Milan and its Madagascar Collection The Museo Civico di Storia Naturale... the museum began paleontologic fieldwork in Madagascar (upper Permian fauna and Jurassic and Cretaceous...fieldwork in Madagascar in 1996 in collaboration with other institu tions in Madagascar, Italy, and the...Pezzotta has spent a total of twenty nine months in Madagascar making geological-mineralogical surveys. In collaboration...both classic and new minerals and gemstones from Madagascar opened at the Natural History Museum in Milan |  | | Journal (article/letter/editorial) | | belt, Vohidava area, Precambrian of southern Madagascar T. Razakamanana1 , D. Ackermand2 , and B. F....de la Terre, Universite de Toliara, Toliara, Madagascar Institut f ur Geowissenschaften, Universitat...southern Madagascar. It consists of migmatitic paragneiss commonly interlayered with phlogopite-bearing...phlogopite-bearing diopsidite, phlogopite-humite-diopside-spinel marble, sillimanitegarnet quartzite and syn-tectonic...decompressional central part of this shear belt of southern Madagascar. Zusammenfassung HoÈgbomit in migmatitischem |  | de Grave, Johan, de Paepe, Paul, de Grave, Eddy, Vochten, Renaud, Eeckhout, Sigrid G. (2002) Mineralogical and Mössbauer spectroscopic study of a diopside occurring in the marbles of Andranondambo, southern Madagascar. American Mineralogist, 87 (1) 132-141 doi:10.2138/am-2002-0114 | Journal (article/letter/editorial) | | occurring in the marbles of Andranondambo, southern Madagascar JOHAN DE GRAVE,1,* PAUL DE PAEPE,1 EDDY DE GRAVE...marbles and skarns at Andranondambo, southern Madagascar, were investigated with various techniques in...to be consistent with those obtained for the Madagascar crystals. The relation between mineral paragenesis... 1) is a famous sapphire deposit in southern Madagascar (Delbos and Rantoanina 1996; Schwarz et al. 1996;...metamorphic rocks of granulite facies assigned to the Tranomaro group. The latter is a subdivision of the Androyen |  | | Journal (article/letter/editorial) | | regions (Aldan, Baykal, Pamir, Korea, Canada, Madagascar, and Antarctica) there are widely distributed...distributed complexes of diopside rocks associated with phlogopite and sometimes apatite and magnetite deposits...usually do not contain other minerals, especially phlogopite. - In the sectors that have undergone migmatization...spinel, amphibole, phlogopite and sphene. In this case, it must be stressed that phlogopite forms only small...skarn zones are usually thin and do not contain phlogopite and magnetite. Since several age groups of granites |  | Sorokina, Elena S., Hofmeister, Wolfgang, Häger, Tobias, Mertz-Kraus, Regina, Buhre, Stephan, Saul, John M. (2016) Morphological and chemical evolution of corundum (ruby and sapphire): Crystal ontogeny reconstructed by EMPA, LA-ICP-MS, and Cr3+Raman mapping. American Mineralogist, 101 (12) 2716-2722 doi:10.2138/am-2016-5614 | Journal (article/letter/editorial) | | crystals from deposits in Africa (Kenya, Tanzania, Madagascar) and Southeast Asia (Vietnam). Trace-element...≥2000 mg/g in sapphires from Andranondambo in Madagascar, formed during the final stage of contact metamorphism...geochemistry, crystal morphology, Kenya, Tanzania, Madagascar, Vietnam Introduction “…for a given body of...Kenya, Morogoro in Tanzania, and Andranondambo in Madagascar) and Southeast Asia (Luc Yen in Vietnam). Rim-to-rim...(one sample), the Andranondambo skarn deposit of Madagascar (four samples), the Luc Yen marble-hosted primary |  | | Journal (article/letter/editorial) | | Granulites from the Precambrian of Southern Madagascar: Implications for the Evolution of the Deep Crust... Universitt de Toliara, BP 285, Toliara 601, Madagascar Dept. of Earth and Planetary Sciences, Tokyo...Kiel, Germany In the Precambrian of Southern Madagascar (PSM) south of the Ranotsara shear zone, recent...intervening crustal blocks (Vohibory, Bekily and Tranomaro). The gneissic shear zones define tectonic boundaries...terrane accretion model for the Precambrian of Madagascar during the Pan-African orogeny (PAO) (750-530 |
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Tranomaro, Amboasary Sud District, Anosy, Madagascar