 | Simmons, W. B., Pezzotta, F., Falster, A. U., Webber, K. L. (2001) Londonite, a new mineral species: the Cs-dominant analogue of rhodizite from the Antandrokomby granitic pegmatite, Madagascar. The Canadian Mineralogist, 39 (3) 747-755 doi:10.2113/gscanmin.39.3.747 | Journal (article/letter/editorial) | | RHODIZITE FROM THE ANTANDROKOMBY GRANITIC PEGMATITE, MADAGASCAR WILLIAM B. SIMMONS§ Department of Geology and...dike of granitic pegmatite in the Manandona valley, Antsirabe region, and at Ampanivana and Antsongombato...in the Betafo region south of Mahaiza, all in Madagascar. Londonite occurs in the inner zones and in miarolitic...Associated minerals include microcline, quartz, albite, tourmaline (elbaite – liddicoatite – schorl series)...rhodizite, Antandrokomby, Ampanivana, Antsongombato, Madagascar. SOMMAIRE La londonite, (Cs,K,Rb) Al4 Be4 (B |  | Novák, Milan, Cempírek, Jan, Gadas, Petr, Škoda, Radek, Vašinová Galiová, Michaela, Pezzotta, Federico, Groat, Lee A. (2015) Boralsilite and Li, Be-bearing "Boron Mullite" Al8B2Si2O19, Breakdown products of spodumene from the Manjaka pegmatite, Sahatany valley, Madagascar. The Canadian Mineralogist, 53 (2) 357-374 doi:10.3749/canmin.1400092 | Journal (article/letter/editorial) | | PRODUCTS OF SPODUMENE FROM THE MANJAKA PEGMATITE, SAHATANY VALLEY, MADAGASCAR MILAN NOVÁK§ Department of...from the elbaite-subtype Manjaka granitic pegmatite, Sahatany Valley, Madagascar. The pegmatite mineral...up to 10 cm long, mostly as narrow albite > K-feldspar zones (albite > K-feldspar > boralsilite > “boron...Al8B2Si2O19, up to 100 μm long, are mostly enclosed in albite and rarely in K-feldspar. The EMP and LA-ICP-MS...estimated for the crystallization of the assemblage albite + boralsilite, are significantly lower than those |  | | 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 |  | Ertl, Andreas, Tillmanns, Ekkehart, Ntaflos, Theodoros, Francis, Carl, Giester, Gerald, Körner, Wilfried, Hughes, John M., Lengauer, Christian, Prem, Markus (2008) Tetrahedrally coordinated boron in Al-rich tourmaline and its relationship to the pressure-temperature conditions of formation. European Journal of Mineralogy, 20 (5) 881-888 doi:10.1127/0935-1221/2008/0020-1869 | Journal (article/letter/editorial) | | tourmaline from the Sahatany Pegmatite Field at Manjaka, Sahatany Valley, Madagascar, was structurally...500–700 MPa/630 C. Key-words: Al-rich tourmaline, Manjaka, tetrahedrally coordinated boron, crystal structure...of [4]B from the Sahatany Pegma- tite Field, Madagascar. The pegmatite at Manjaka (west of the village...village Ihasy), Sahatany Valley, Betafo-Antsirabé region, Antananarivo Province, Madagascar, is located...located in the Sahatany Pegmatite Field. Gem tourmaline (elbaite) has been mined in this marble-hosted, complex |  | | Journal (article/letter/editorial) | | granitic pegmatites of the Itremo region, central Madagascar Federico Pezzotta In the last decade, in pegmatite...metasedimentary upper unit of the Itremo Group, Central Madagascar (Fernandez et aI., 2001), local mining cooperatives...Ta-Nb borates: 1) central Sahatany valley, south of Antsirabe (pegmatites of Manjaka, 1I0ntsa and Marirana);...Marirana); 2) Manandona valley, south of the Sahatany (pegmatite of Antandrokomby); 3) Manapa-Antsetsindrano...walls of the dike. At the center, large crystals of albite, K-feldspar, spodumene and danburite with minor |  | Cempírek, Jan, Grew, Edward S., Kampf, Anthony R., Ma, Chi, Novák, Milan, Gadas, Petr, Škoda, Radek, Vašinová-Galiová, Michaela, Pezzotta, Federico, Groat, Lee A., Krivovichev, Sergey V. (2016) Vránaite, ideally Al16B4Si4O38, a new mineral related to boralsilite, Al16B6Si2O37, from the Manjaka pegmatite, Sahatany Valley, Madagascar. American Mineralogist, 101 (9) 2108-2117 doi:10.2138/am-2016-5686 | Journal (article/letter/editorial) | | boralsilite, Al16B6Si2O37, from the Manjaka pegmatite, Sahatany Valley, Madagascar Jan Cempírek1, Edward S. Grew2...found with albite and K-feldspar as a breakdown product of spodumene in the elbaite-subtype Manjaka granitic...granitic pegmatite, Sahatany Valley, Madagascar. Boralsilite also occurs in this association, although separately...diffusion rates. Keywords: Vránaite, boralsilite, Madagascar, pegmatite, new mineral, structural complexity...the Manjaka pegmatite, Sahatany Valley, Madagascar. Crystallographic study showed that the Manjaka mineral |  | | Report (issue) | | 7.317–7.319 Z=1 X-ray Powder Pattern: Manjaka, Madagascar; very similar to londonite. 2.983 (100),...Total [101.0] [99.79] (1) Ambatofinandrahana, Madagascar; B2 O3 by ICP, SiO2 6.23% assumed as quartz;...(B11.35 Be0.55 )Σ=11.90 O28.00 . (2) Andasy, Madagascar; by electron microprobe, average of seven analyses...Londonite, elbaite, spodumene, beryl, béhierite, albite, microcline, quartz. Distribution: Found near...Sarapulka and Shaitanka, Mursinka district, Ural Mountains, Russia. In Madagascar, from Antandrokomby, near Mt |  | | Report (issue) | | 3205(3) Z=1 X-ray Powder Pattern: Antandrokomby, Madagascar (very similar to rhodizite). 2.9898 (100), 2...10 0.53 [100.07] [99.91] (1) Antandrokomby, Madagascar; by electron microprobe, average of five analyses...(B10.99 Si0.01 Be1.00 )Σ=12.00 O28.00 . (2) Manjaka, Madagascar; original total given as 99.92%, neglecting...béhierite, hafnian zircon, albite, microcline, quartz. Distribution: In Madagascar, from Antandrokomby, near...near Mt. Bity, Manandona Valley, Antsirabe district; at Antsongombato and Ampanivana, south of Mahaiza |  | | Journal (article/letter/editorial) | | partially replace spessartine–almandine garnet and albite in elbaite-subtype pegmatites cutting pyroxene...(at Tamponilapa and Tsarafara-Nord, Sahatany Valley, Madagascar) and paragneisses (at Ctidružice, Moldanubian...Moldanubian Zone, Czech Republic). Only garnet from the albite adjacent to an unit with Li-bearing minerals (Li-micas...were likely sourced from the replaced garnet and albite, whereas the residual fluids supplied B, F, Li...Novák Tamponilapa and Tsarafara-Nord, Sahatany Valley, Madagascar and Ctidružice, Moldanubian Zone, Czech |  | Pekov, I. V., Yakubovich, O. V., Massa, W., Chukanov, N. V., Kononkova, N. N., Agakhanov, A. A., Karpenko, V. Y. (2010) Londonite from the Urals, and new aspects of the crystal chemistry of the rhodozite-londonite series. The Canadian Mineralogist, 48 (2) 241-254 doi:10.3749/canmin.48.2.241 | Journal (article/letter/editorial) | | spectrum, granitic pegmatite, Urals, Russia, Madagascar. Sommaire Ce travail porte sur trois échantillons...infrarouge, pegmatite granitique, Ourales, Russie, Madagascar. Introduction Rhodizite and londonite are aluminum...years of 20th century, rhodizite was found in Madagascar, where it is a relatively common mineral of many...localities in Madagascar. Both K- and Cs-dominant samples have been found in Madagascar pegmatites. Until...three pegmatites located in different parts of Madagascar (Simmons et al. 2001). Thus, the precise chemical |  | | Journal (article/letter/editorial) | | pegmatite contain a series of Nb-Ta-UTh minerals, and albite units host Ta-Fe mineralization. Minerals identified...only from the Sahatany Valley region in Madagascar. The principle occurrence is the Manjaka pegmatite, where...is associated with abundant pink to red elbaite, albite, manganotantalite, quartz, and blue manganapatite...Animikie Red Ace pegmatite is very similar to that at Manjaka and suggests similar bulk chemistry of the pegmatitic...reported in the earlier analysis of behierite from Manjaka (Mrose and Rose 1962). SnO,, MnO, FeO, and Bi,O |  | | Journal (article/letter/editorial) | | found at and within the pockets, or associated with albite + lepidolite in massive pegmatite. Hambergite,...Ctidru~ice, Biskupice, Vlast~jovice, Kom/trovice, Jeclov II). However, isolated occurrences also are present...A coarse-grained schorl-enriched unit (quartz + albite + schorl + K-feldspar _+garnet) is present in some...local pods or even independent zones. Patches of an albite unit consist particularly of medium-to coarse-grained...pegmatite bodies. A fine-to medium-grained saccharoidal albite occurring only at CtidruNce locally show a distinct |  | | Report (issue) | | c = 5.472(5) Z=4 X-ray Powder Pattern: Manjaka, Madagascar; very close to schiavinatoite. 4.10 (100)...38 52.18 [101.45] 100.00 (1) Antsongombato, Madagascar; by electron microprobe, B2 O3 calculated from...fluorescence analysis of type material from Manjaka, Madagascar is stated to have shown Ta:Nb:Zr = 18:1:0...manganoan apatite, lepidolite, quartz, albite (Manjaka, Madagascar); schiavinatoite, rhodizite, elbaite–liddicoatite...(Antsongombato, Madagascar). Distribution: From Manjaka and Antsongombato, south of Betafo, Madagascar. In the |  | | Journal (article/letter/editorial) | | The main mineral constituents of the aplite are albite, potash-feldspar, lithian-micas, and quartz in...approaches albitite in composition and consists of albite and quartz with minor amounts of apatite, tourmaline...I F F E (b) 'White aplite.' This rock carries albite, quartz, and colourless to light-pink lithian mica...are composed of ortboclase, quartz, Li A1 micas, albite and elbaite, whilst in the second, micaceous type...addition, narrow veinlets composed of microcline, albite, axinite, prehnite, fluorite, and calcite, etc |  | | Journal (issue) | | collectors." Petedunnite, Franklin, Franklin Mining District, Sussex Co., New Jersey However, Pete demonstrated...and Sterling Hill ( 1765-1 900), each constituted a Ii Fe's w ork that has been cited as the " unmatched...light cornice, and sliding glass doors are slam ,ii:, specially priced at just $2,899, FOB factory. Full...Mine is about one mile south ofthe town of Pioche. II is on the east side of the Ely Range, a.k.a. The...who also own the Wide Awake Mine in the District, The Ely Valley Mine, The Medha Mine and the Godbe Mill |  | | Journal (article/letter/editorial) | | localities in Madagascar, including Antandrokomby near Mt Bity and at Manjaka and Ampakita in the Sahatany valley...Many crystalline specimens were obtained from Madagascar in the early 1960s and using material from this...from Ambatofinandrahana, in the Ankarata Mts, Madagascar (20 ~ 33' S., 46 ~ 49' E.), were obtained from...Duparc et al. (1911), although contaminated by albite, yields a structurally meaningful composition....recalculated assuming all silicon present is from the albite impurity (4.63 ~o), the formula obtained is (Nao |  | Novák, M., Prokop, J., Losos, Z., Macek, I. (2017) Tourmaline, an indicator of external Mg-contamination of granitic pegmatites from host serpentinite; examples from the Moldanubian Zone, Czech Republic. Mineralogy and Petrology, 111 (4) 625-641 doi:10.1007/s00710-017-0512-4 | Journal (article/letter/editorial) | | rocks (group A) of anatectic or metasomatic origin, (ii) subhomogeneous to simply zoned barren pegmatite...of pegmatite solidification (Novák et al. 2012); (ii) post-emplacement stage of contamination of pegmatite...structure in various pressuretemperature conditions, (ii) common occurrence in different stages of pegmatite...orthogneiss, quartzite, amphibolite is overlain by (ii) the Varied group, Tourmaline, an indicator of...2015b): (i) pre-Variscan (metamorphosed) pegmatites; (ii) several types of simple anatectic (abyssal) pegmatites; |  | | Book (volume) | | ÏLi CEOLC-I: Uoogl. Kerk», *ch( 1 7 ü - ’D-'ir .II. Lei.&n MliMilMIJJUll! LA 1)1! SUPPLEMENT...figurent pas dans ceux-ci. En ce qui concerne Madagascar, d’où documents nouveaux, offrant un intérêt...coloration brun rouge. GISEMENTS ET ASSOCIATIONS Madagascar. — J’ai donné le nom d’ampaugabéite [C. B. CXLIV...ANrHOPHYLLITE-GÉDRITE (ï. p. 035; 1 , T. VI, p. 784). — Madagascar. J’ai rencontré [B. S.M. XXXV. 97. 1912) un...micaschistes mont Bitv). IV, p. 787). — Madagascar. J’ai visité le gisement d’Ambatoarina, d’où |  | | Journal (article/letter/editorial) | | Cleavage basal and prismatic good. 765 766 N ]II,V M I N IiRI L N A M T^9 Color blackish, rutile-like...crystals in albite and associated with rubellite were found in the pegmatite at Manjaka, Madagascar, and were...Behier, mineralogist of the Service geologique, Madagascar. Drscussron.-Names should not be published without...analysis (No. 3, p. 325, Dana,s System, 7th Ed., Vol. II) gave the same composition as for monoclinic pinakiolite...resources of the Kinta Valley, Perak Federation of Malaya, Geol. Surley District Mem. No. 9, t-347 (19ffi) |  | | Journal (article/letter/editorial) | | hydrothermal beryl II and phenakite II occur in miarolitic pockets (paragenetic type II). Secondary hydrothermal...elevated contents of Na, Cs, Mg, Fe, Sc in beryl I and II; Na, Ca, Mg, Fe, Al in bazzite III; REE in milar...magmatic Be-minerals within a single pegmatite district is exceptional and it is constrained by variable...Kožichovice I,II; POZ – Pozďátky; KLU – Klučov III; OKR – Okrašovice; CIM – Číměř I,II; KRA – Kracovice...geochemically primitive allanite-type pegmatites, and (ii) more evolved euxenite-type pegmatites (Novák et |  | Zolotarev, , Krivovichev, , Panikorovskii, , Gurzhiy, , Bocharov, , Rassomakhin, (2019) Dmisteinbergite, CaAl2Si2O8, a Metastable Polymorph of Anorthite: Crystal-Structure and Raman Spectroscopic Study of the Holotype Specimen. Minerals, 9 (10) 570 doi:10.3390/min9100570 | Journal (article/letter/editorial) | | disordered structure having the P63 /mcm symmetry; (ii) degree of disorder of the O sites, which may have...uniqueobserved observed reflections reflections with with II ≥ ≥ 2σ(I) using for using the the ShelX ShelX program...tetrahedral with completely structure thesymmetry; P63/mcm (ii) degree of disorder of the O sites (particularly...which have a direct influence upon the symmetry; (ii) degree of disorder of the O sites (particularly...N.V. Kumdykolite, an orthorhombic polymorph of albite, from the Kokchetav ultrahigh-pressure massif, |  | | Journal (article/letter/editorial) | | columbite is related to a particular pegmatite district, its paragenetic position, and the presence of...Columbite occurs as tabular crystals in a unit of albite-muscovite-beryl (+ triplite and spessaritite) rock...internal reflection indicates high Mn content. Petoco District, New Merico Ref.: Jahns, 1946 Deposits represented:...stibiotantalite, tapiolite, samarskite (Petaca district, N. M.) and euxenite (Lyndoch, Ont., Virginia)...structure A. Uniformly distributed B. Variable, in zones II. Inclusions of other hypogene radioactive species |  | | Journal (article/letter/editorial) | | overwhelmed by the vast amounts of quartz, K-feldspar and albite, and the minor amounts of the hydrous phase, that...assemblage of magmatic minerals includes, in addition to albite, coarse corundum in some dikes, muscovite, zircon...Stähle et al. (1990) have documented the presence of albite-dominant zircon syenite pegmatites that cut the...massif, in pegmatite dikes exposed in the Cannobina Valley, for example (A. Guastoni, pers. commun., 2004)...change where the degree of metamictization is low), Valley (2003) found that one could expect a decodable |  | | Book | | 80 Emerald and 140 Beryls, as Founda- Part II 86 87 Birthstones, Beryl in India, CHEMICAL AND... Japan, 462 Switzerland, 510 Tanzania 463 Madagascar (Malagasy Republic), Malawi Nepal, 482 513...of cultural the present work astrological Part II lesser extent, a of part to knowledge has been...derived from erald. 5 M. but C. . which to II in the searched the literature for references to...more km) from Coptos passed center for these district, correspond cites a King to the are to Bostock |  | Čopjaková, Renata, Prokop, Jiří, Novák, Milan, Losos, Zdeněk, Gadas, Petr, Škoda, Radek, Holá, Markéta (2021) Hydrothermal alteration of tourmaline from pegmatitic rocks enclosed in serpentinites: Multistage processes with distinct fluid sources. Lithos, 380. 105823pp. doi:10.1016/j.lithos.2020.105823 | Journal (article/letter/editorial) | | particularly in the more evolved pegmatites, and (ii) fluids infiltrated/diffused from host rocks (Mg...Oslavany II) and more evolved, complexly zoned pegmatite dikes with Be -p minerals (Věžná II, Věžná I);...I); the last type has extremely fractionated albite-pollucite zone re containing Li and Cs minerals...calc-silicate rocks. Both ro groups are overlain by (ii) the structurally highest Gföhl Unit comprising felsic...(metamorphosed) pegmatites (Novák et al., 2013); (ii) several types of simple anatectic (abyssal) pegmatites |
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Manjaka, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar