 | 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... 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 d’Ambre, Bobaomby and Ampasindava peninsula, Nosy Be archipelago, Amparihy-Ankasimbelona and Ankaizina |  | | Book | | OF AUD, RESEARCH GEOLOGICAL COUNCIL SCIENCES be MINERAL RESOURCES DIVISION NephelineSyenite and...nepheline-syenite contains too much iron for the rock to be utilised directly in its most important outlets,...capacity of the Arkansas granule plant is reported to be 100,000 tons. Nepheline-syenites do not bulk large...demands for all raw materials, alternative sources may be developed which are conveniently situated to centres...economic factors have to be satisfied before the development of a deposit can be contemplated. A first requirement |  | Estrade, Guillaume, Béziat, Didier, Salvi, Stefano, Tiepolo, Massimo, Paquette, Jean-Louis, Rakotovao, Soatsitohaina (2014) Unusual evolution of silica-under- and -oversaturated alkaline rocks in the Cenozoic Ambohimirahavavy Complex (Madagascar): Mineralogical and geochemical evidence. Lithos, 206. 361-383 doi:10.1016/j.lithos.2014.08.008 | Journal (article/letter/editorial) | | rocks in the Cenozoic Ambohimirahavavy Complex (Madagascar): Mineralogical and geochemical evidence Guillaume...rocks in the Cenozoic Ambohimirahavavy Complex (Madagascar): Mineralogical and geochemical evidence, LITHOS...note that during the production process errors may be discovered which could affect the content, and all...rocks in the Cenozoic Ambohimirahavavy Complex (Madagascar): Mineralogical and PT geochemical evidence...supérieure polytechnique de Madagascar, Ambatomaro Antsobolo Antananarivo Madagascar CE e PT Clermont-Ferrand |  | | Journal (article/letter/editorial) | | Mineralization in the Ambohimirahavavy Alkaline Complex, Madagascar Guillaume Estrade,1 Stefano Salvi,1,† Didier...Cenozoic Ambohimirahavavy alkaline complex in Madagascar consists of several syenitic to granitic intrusions...and Ca-HFSE-rich phases in pseudomorphs after aegirine-augite. In the exoskarn, the main HFSE-rich phases...alkaline complex, located in the northwest of Madagascar, has been the subject of a recent publication...Ampasindava peninsula, 40 km south of Nosy Be Island, in northwestern Madagascar (Figs. 1a-b), and is part of |  | | Report (issue) | | petrogenesis of the Massif d’Ambre volcano, northern Madagascar . . . . . . . . . . . . . . . . . . . . . . ...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...between clinopyroxene and hornblende in C4 appear to be close to 1 for REE (rare earth elements), but different...following. Nd isotopes in the leachates could not be determined because Nd contents were too low. This |  | | Book | | 1st edition (1989), it shows how igneous rocks can be distinguished in the sequence of pyroclastic rocks...plutonic and volcanic rocks that remain can then be categorized using the familiar and widely accepted...the terms included in the glossary, this book will be an indispensable reference guide for all geologists...well-sorted pyroclastic rocks ............. 9 2.4 Terms to be used for mixed pyroclastic–epiclastic rocks .......was with a quantitative modal approach – what could be observed and quantified under the microscope. However |  | | Book | | for Students it was suggested that a replacement be provided on the same lines. The present book, in...increase rises rapidly until, finally, a glass may be formed. The marked increase in viscosity occurs in...the nucleus number. The facts outlined above may be applied most directly to the textures of lavas and...solidify as a glass. The resulting rock is said to be holohyaline. Siliceous magmas are particularly prone...Nevertheless, their former presence may frequently be proved, even after complete devitrification, by the |  | | Book | | in the definitions is included for those who may be unfamiliar with the language of petrology. Recent...I II II 3 9042 0 506061 For Reference Not to be taken from this room t 1*w^ *' r7- .•-^> <1...of this work covered by the copyrights hereon may be reproduced or used in any form or by any means—graphic...became clear that other materials should likewise be considered. Migmatites, tektites, impactites, and...lithographic limestone, and pellet limestone will be found under limestone (the root name). Furthermore |  | | Journal (volume) | | „It is much better to recognize this situation and be on the lookout for new evidence than to accept any...greatly from other similar stone matter. In order to be able to discriminate correctly and minutely what...ingredients of granite, but their proportions will also be more or less constant, viz. about 25—30% quartz,...third, mineralogical composition and structure, must be put first. With regard to the first feature — the...is the resu lt1of some natural process; this can be taken for granted for every kind of rock. The fourth |
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