 | | Journal (article/letter/editorial) | | (REE) carbonates from alkaline pegmatites of Mount Malosa, Malawi AlessAndro GuAstoni,1 FAbrizio nestolA,1...chemistry and alteration of bastnäsite-(Ce), parisite-(Ce), and synchysite(Ce) was investigated by EMPA...Significant amounts of OH in both the parisite-(Ce) and synchysite-(Ce) were found, and these data are the first...for parisite and synchysite. Parisite-(Ce) and synchysite-(Ce) OH end-members have not been described...carbonates, Mount Malosa, Malawi, hydration introduction The crystal structures of bastnäsite-(Ce) and synchysite-(Ce) |  | | Journal (issue) | | Confocal Raman to Identify Emeralds Bastnäsite and Parisite from Malawi THE QUARTERLY JOURNAL OF THE GEMOLOGICAL...geographic origin. 42 Bastnäsite-(Ce) and Parisite-(Ce) from Mt. Malosa, Malawi Alessandro Guastoni, David...and water vapor in air. The spectra in the mid-IR region were normalized based on the two-phonon absorptions...absorptions of diamond, and in the near-IR region based on its three-phonon absorptions. This allowed us to...very weak and sharp absorptions in the UVVis-NIR region at liquid nitrogen temperature. The sampling interval |  | Macdonald, Ray, Bagiński, Bogusław, Kartashov, Pavel M., Zozulya, Dmitry, Dzierżanowski, Piotr, Jokubauskas, Petras (2015) Hydrothermal alteration of a chevkinite-group mineral to a bastnäsite-(Ce)-ilmenite- columbite-(Fe) assemblage: interaction with a F-, CO2-rich fluid. Mineralogy and Petrology, 109 (6) 659-678 doi:10.1007/s00710-015-0394-2 | Journal (article/letter/editorial) | | alteration of a chevkinite-group mineral to a bastnäsite-(Ce)-ilmenite- columbite-(Fe) assemblage: interaction...chevkinite-(Ce) which occurs in a syenitic pegmatite from the Vishnevye Mountains, Urals Region, Russia....progressive alteration of the chevkinite to a bastnäsite-(Ce)-ilmenite-columbite-(Fe) assemblage through...the exception of La, released from the chevkinite-(Ce) were reincorporated into later phases, such that...Jiang (2006) described the alteration of chevkinite-(Ce) to a corona of allanite-ilmenitetitanite-epidote-quartz |  | | Journal (article/letter/editorial) | | anorogenic magmatism in the Chilwa Province of Malawi, East African Rift The Chilwa Province of alkaline...alkaline igneous rocks and carbonatites in Malawi and neighboring Mozambique displays three major cycles...pegmatites that appear at the end stage of the Zomba–Malosa complex are arguably the most spectacular example...mineralogical expression], zircon, bastnäsite-(Ce), parisite-(Ce), xenotime(Y), caysichite, Y-rich milarite...milarite, hingganite-(Y), polycrase-(Y), Ce-rich pyrochlore, and niobophyllite–astrophyllite, among others |  | Susta, Umberto, Della Ventura, Giancarlo, Hawthorne, Frank C., Abdu, Yassir A., Day, Maxwell C., Mihailova, Boriana, Oberti, Roberta (2018) The crystal-chemistry of riebeckite, ideally Na2Fe32+ Fe23+Si8O22(OH)2: a multi-technique study. Mineralogical Magazine, 82 (4) 837-852 doi:10.1180/minmag.2017.081.064 | Journal (article/letter/editorial) | | characterization of a near endmember riebeckite from Malawi, and use the available data to critically compare...presented and discussed. FTIR spectra in the NIR region are also presented for the first time 36 for...lis he d Ar tic le 28 Key words: riebeckite, Malawi, EMP, Mossbauer, crystal-structure, FTIR and Raman...is an alkali 73 pegmatite from Mt. Malosa, Zomba District (Malawi), and consists of centimeter-sized...Spectroscopy (LA ICP-MS) at UM-DGS on the same mount previously used for 110 EMPA. A Merchantek New |  | | Journal (article/letter/editorial) | | 3749/canmin.1400012 AN UNUSUAL OCCURRENCE OF SYNCHYSITE-(Ce) IN AMYGDULES FROM THE ESTEREL VOLCANIC ROCKS, FRANCE:...appear to be particularly enriched in synchysite-(Ce), developed as fibrous aggregates together with chlorite...crystallize from the hydrothermal solution was synchysite-(Ce), whose REE pattern has strong similarities to the...basalt. Keywords: rare-earth elements, synchysite-(Ce), basalt, alteration, amygdule, Esterel, France....synchysite-(Ce) in this uncommon environment. GEOLOGICAL CONTEXT The Massif de l’Esterel (southern France) |  | Stoppa, Francesco, Schiazza, Mariangela, Rosatelli, Gianluigi, Castorina, Francesca, Sharygin, Victor V., Ambrosio, Francesco Antonio, Vicentini, Noemi (2019) Italian carbonatite system: From mantle to ore-deposit. Ore Geology Reviews, 114. 103041 doi:10.1016/j.oregeorev.2019.103041 | Journal (article/letter/editorial) | | Pianciano, Ficoreto and Forcinelle in the Roman Region demonstrates that Italian carbonatites are not...fluorcarbonate and silicates -(bastnäsite-(Ce)- Ce(CO3)F and britholite-(Ce)- (Ce,Ca)5(SiO4,PO4)3(OH,F) . Vanadates...Italy in a large volcanic area, named ‘The Roman Region’ (RR) by Washington (1906) (Fig. 1). Locardi (1990)... PR India (Viladkar et al., 2019). AL ROMAN REGION CARBONATITE OCCURRENCES Subvolcanic carbonatites...of Sr-rich calcite, analcime, barite, britholite-(Ce), baritocelestine and Ba-Ca zeolites (Fig. 2a). Melilite |  | | Journal (article/letter/editorial) | | minerals Article Synchysite-(Ce) from Cinquevalli (Trento, Italy): Stacking Disorder and the Polytypism...January 2020 Abstract: Synchysite-(Ce) at Cinquevalli occurs as fine needles intergrown...oxidized chalcopyrite as major constituents. Synchysite-(Ce) [Ca1.00 (Ce0.43 La0.26 Nd0.17 Y0.07 Pr0.04 Sm0.02...58 (OH)0.42 )], shows an overgrowth rim of bastnäsite-(Ce) [(Ce0.34 La0.25 Nd0.17 Pb0.07 C a0.06 Y0.06...Unit cell refinement of synchysite (C2/c) and bastnäsite (P62c) led to a = 12.272(4), b = 7.100(2), c |  | Oberti, Roberta, Boiocchi, Massimo, Zema, Michele, Hawthorne, Frank C., Redhammer, Günther J., Susta, Umberto, Ventura, Giancarlo Della (2018) The high-temperature behaviour of riebeckite: expansivity, deprotonation, selective Fe oxidation and a novel cation disordering scheme for amphiboles. European Journal of Mineralogy, 30 (3) 437-449 doi:10.1127/ejm/2018/0030-2712 | Journal (article/letter/editorial) | | rock is an alkali pegmatite from Mt. Malosa, Zomba District (Malawi), and consists of centimeter-sized...unit-cell parameters observed for riebeckite from Malawi and in the deprotonated phase during the annealing...Crystal data and refinement data for riebeckite from Malawi. Ss stands for site-scattering (in electrons per...double-chain of tetrahedra for riebeckite from Malawi during thermal annealing. Bond distances for T...T values on a single crystal of riebeckite from Malawi (thickness 135 mm) on the untreated sample, and |  | Ciobanu, Cristiana, Kontonikas-Charos, Alkis, Slattery, Ashley, Cook, Nigel, Wade, Benjamin, Ehrig, Kathy (2017) Short-Range Stacking Disorder in Mixed-Layer Compounds: A HAADF STEM Study of Bastnäsite-Parisite Intergrowths. Minerals, 7 (11) 227 doi:10.3390/min7110227 | Journal (article/letter/editorial) | | Mixed-Layer Compounds: A HAADF STEM Study of Bastnäsite-Parisite Intergrowths Cristiana L. Ciobanu 1...intergrowths account for the compositional range between bastnäsite and parasite, as measured by electron probe microanalysis...These comprise rhythmic intervals of parisite and bastnäsite, or stacking sequences with gradational changes...slab stacking between B, BBS and BS types (B—bastnäsite, S—synchysite). An additional occurrence of an...is identified among sequences of parisite and bastnäsite within the studied lamellar intergrowths. Both |  | | Journal (article/letter/editorial) | | zircon, thorite, strontian epidote, aeschynite-(Ce), betafite, ferrocolumbite, rutile, and a rich suite...Borborema belt in Brazil, and in the Pala District of southern California. The spatial association with calc-alkaline...Consider the Chilwa alkaline province, in southern Malawi, of Cretaceous age. What makes it unusual,...largest plutons in the Chilwa Province (e.g., the Zomba–Malosa pluton) consist of syenite and peralkaline granite...the bodies of NYF pegmatite that occur at Mount Malosa in Malawi, associated with the classic A-type granite |  | Alles, Jonas, Ploch, Alexander-Maria, Schirmer, Thomas, Nolte, Nicole, Liessmann, Wilfried, Lehmann, Bernd (2019) Rare-earth-element enrichment in post-Variscan polymetallic vein systems of the Harz Mountains, Germany. Mineralium Deposita, 54 (2) 307-328 doi:10.1007/s00126-018-0847-8 | Journal (article/letter/editorial) | | PAAS-normalized REE patterns with a Eu peak but without Ce or Y anomalies and with a steeply dipping HREE pattern...identifies these patterns as dominated by synchysite-(Ce–Nd) with strong Eu enrichment in the weight percent... which seems to be a diagnostic feature of the region and suggests a large-scale Mesozoic fluid system...favorably with carbonatite-related LREE-dominated bastnäsite from China and elsewhere and allows an interesting...rare earth elements (REE), especially light REE (La, Ce, Sm, Eu) (Möller et al. 1979, 1984; Lüders et al |  | | Journal (issue) | | 30067, Tel: 770-973-3632, E-mail: jcgray@gsu.edu Southern California Chapter Visit our website at www.mineralsocal...Lynch Station in Campbell County, Virginia, on the southern bank of Bishop Creek. It is not indicated on the...Highway 43. Figure 2. Mines and prospects in the southern portion of the James River–Roanoke River manganese...occurrences of iron and manganese ores are located in the Mount Athos Formation, which contains beds of quartzite...quartzite and an included white marble unit of the Mount Athos Formation. The shaft sunk in search of copper |  | | Journal (issue) | | scratch the surface of this spectacular mining region, to which whole libraries have been devoted. That...Wikimedia Commons. Native Americans who moved into the region almost immediately after the glaciers receded,...volume 54, January–February, 2023 control of the region, another unsuccessful attempt at mining was made...mostly forgotten until American exploration of the region began in the 1830s. Douglass Houghton probably...shortly thereafter in Ontonagon County at the southern end of the district. Because these veins are often |  | | Book | | the Early Precambrian crystalline basement in southern North China Craton is the mosaic amalgamation... 2001; Ernst et al. 2008). It is also an ideal region to understand the cycles of supercontinent assembly...southward termed the Huaxiong block (reactivated southern margin of the North China Craton), the North Qinling...(Chen et al. 2009b). The western SQL (including southern Shaanxi, eastern Gansu, and northern Sichuan)...Early Precambrian crystalline basement in the southern margin of the North China Craton. (2) the tectonic |
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Mount Malosa, Zomba, Southern Region, Malawi