 | Bardintzeff, Jacques-Marie, LiĂ©geois, Jean-Paul, Bonin, Bernard, Bellon, HervĂ©, Rasamimanana, Georges (2010) Madagascar volcanic provinces linked to the Gondwana break-up: Geochemical and isotopic evidences for contrasting mantle sources. Gondwana Research, 18 (2) 295-314 doi:10.1016/j.gr.2009.11.010 | Journal (article/letter/editorial) | | w. e l s ev i e r. c o m / l o c a t e / g r Madagascar volcanic provinces linked to the Gondwana break-up:...Mines, BP 322, Ampandrianomby, 101 Antananarivo, Madagascar b c a r t i c l e i n f o Article history:...2009 Available online 11 December 2009 Keywords: Madagascar KâAr geochronology SrâNd isotopes Mantle source...Gondwana break-up and Greater India splitting off, Madagascar suffered volcanic episodes. The Cretaceous Morondava...end-member). Antsoha end-member is considered to be located at the lithosphereâasthenosphere boundary |  | Cucciniello, C., Tucker, R. D., Jourdan, F., Melluso, L., Morra, V. (2016) The age and petrogenesis of alkaline magmatism in the Ampasindava Peninsula and Nosy Be archipelago, northern Madagascar. Mineralogy and Petrology, 110 (2) 309-331 doi:10.1007/s00710-015-0387-1 | Journal (article/letter/editorial) | | the Ampasindava Peninsula and Nosy Be archipelago, northern Madagascar C. Cucciniello 1 & R. D. Tucker...sedimentary rocks of the Antsiranana basin (NW Madagascar) and above the crystalline basement. The magmatism...(eudialyte, F-disilicates). Introduction The island of Madagascar records two magmatic episodes during Cretaceous...(Mailaka and Bemaraha areas) basins in western Madagascar and directly above the Precambrian basement (e...(Massif dâAmbre, Bobaomby and Ampasindava peninsula, Nosy Be archipelago, Amparihy-Ankasimbelona and Ankaizina |  | Giuliani, Gaston, Fallick, Anthony, Rakotondrazafy, Michel, Ohnenstetter, Daniel, Andriamamonjy, Alfred, Ralantoarison, ThĂ©ogĂšne, 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...dâAntananarivo, Ambohitsaina, BP 906, Antananarivo 101, Madagascar Y. Offant Cerege, Europole MĂ©diterranĂ©en de lâArbois...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)...environments in the northern and central regions of Madagascar have consistent ÎŽ18O values between 3.5 and 6 |  | | Journal (article/letter/editorial) | | Mineralization in the Ambohimirahavavy Alkaline Complex, Madagascar Guillaume Estrade,1 Stefano Salvi,1,â Didier...Cenozoic Ambohimirahavavy alkaline complex in Madagascar consists of several syenitic to granitic intrusions...strength element (HFSE)-rich phases consist mainly of zircon, bastnĂ€site-(Ce), and Ca-REE-, and Ca-HFSE-rich...the main HFSE-rich phases are bastnĂ€site-(Ce), zircon, pyrochlore, Nb-rich titanite, and an unidentified...quartz, fluorite, and fluorapatite. The secondary zircon is characterized by a low Zr content and by the |  | Giuliani, Gaston, Groat, Lee, Fallick, Anthony, Pignatelli, Isabella, Pardieu, Vincent (2020) Ruby Deposits: A Review and Geological Classification. Minerals, 10 (7) 597 doi:10.3390/min10070597 | Journal (article/letter/editorial) | | magmatic) origin are hosted by alkali basalts (Madagascar and others), and Type IB corresponding to xenocrysts...according to the new terminology based on mineralogy, be spinels. As gemmology is not simply about science...chromophores such as vanadium (V) and iron (Fe) may be present in the structure of the mineral. The ideal...critical importance for market value. First, it has to be established that the gem was actually mined and was...coupled plasma-mass spectroscopy (LA-ICP-MS). To be able to produce origin reports, gemmological laboratories |  | | Report (issue) | | petrogenesis of the Massif dâAmbre volcano, northern Madagascar . . . . . . . . . . . . . . . . . . . . . . ...metamorphism and granitoid magmatism, Neoproterozoic island-arc formation, collision, and metamorphism ca....(2) accretion of abundant Neoproterozoic juvenile island-arc material toward and on the Arabian plate (Fig...and enrichment of Mg and Si at the rim appear to be independent of the mineral in contact, which is garnet...(which are observed in coexisting pyroxene) could be blurred by the common kelyphite rims. Garnet crystals |  | | Book | | BalmerandMichaelS.Krzemnicki UâPb Dating of Zircon and Zirconolite Inclusions in Marble-Hosted...invaluable data on the trace element variations that can be considered against color images of the studied rubies...shows that their combined individual eïŹects can now be quantiïŹed in their contributions to the observed...dating on gem-quality ruby (and spinel) by using zircon and zirconolite inclusions in these rubies and...zircons and zirconolite crystals. In the study, 109 zircon and 14 zirconolite grains were analyzed from ruby |  | | Journal (issue) | | Bonine Subscriptions Copies of the current issue may be purchased for $29.95 plus shipping. Subscriptions...opinions expressed in signed articles are understood to be opinions of the authors and not of the publisher...facets and complexities that should be addressed if the discussion is to be thorough. As part of GIAâs consumer...The colored stone trade wants the laboratories to be able to tell them with 100% accuracy where their...gemstones come from, and for these determinations to be consistent between all the major laboratories. Unfortunately |  | | Book (volume) | | language Tlingit language Na Guardis Island (Spain) USE Guardia Island (Spain) Na-hsi (Chinese people) USE...(Stratigraphy)âNamibia Nama Island (Micronesia) (Not Subd Geog) UF DâUrville Island (Micronesia) Namo Island (Micronesia)...(Micronesia) Nema Island (Micronesia) San Rafael Island (Micronesia) Urville Island (Micronesia) BT IslandsâMicronesia...people) BT EthnologyâGhana Namo Island (Micronesia) USE Nama Island (Micronesia) Namoi River (N.S.W.)...Atoll (Marshall Islands) USE Namur Island (Marshall Islands) Namur Island (Marshall Islands) UF Namu Atoll |  | | Book (volume) | | people) USE Yaka (African people) (China) Taipa Island (China) I-liu District UF laido Gilbertese...(Brazil) USE Reserva Ecoldgica do IBGE Itbayat Island (Philippines) UF Rio Ibias (Spain) Spain Ibias...language Ibatan language USE Batan language Ibayan Island (Philippines) Kagayan (Philippine people) Ybanag...Threskiomithidae NT Eudocimus Ibiza Island (Spain) UF Ebusus Island (Spain) Eivissa Island (Spain) Isla de Ibiza (Spain)...(Spain) Iviza Island (Spain) BT Islands - â Programming (Continued) Ibiza Island (Spain) IBM |
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