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![(a) MLA mineral map of beige (left) and red (right) REE-<span class="search-highlight">fluorcarbonate</span>-bear...]()
![(A) to (G) BSE images of REE <span class="search-highlight">fluorcarbonates</span> in tailings. Syntaxial intergr...]()
![Combined Raman spectra of selected Okorusu REE <span class="search-highlight">fluorcarbonates</span> obtained at ...]()
![Field photographs of the TCC (see text for details). (a) Basement contact a...]()
![a. Inclusions of REE <span class="search-highlight">fluorcarbonates</span> [Bsn: bastnäsite-(Ce), Par+Syn: assem...]()
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![Backscattered electron images of TCC samples. (a) Fibro-radial aggregates o...]()
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![( A ) Variation plot of Fe and Th. ( B ) Variation plot of Fe and ΣREY. ( C...]()
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1-20 OF 98 RESULTS FOR
fluorcarbonates
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1
Journal Article
QAQARSSUKITE-(Ce), A NEW BARIUM–CERIUM FLUORCARBONATE MINERAL SPECIES FROM QAQARSSUK, GREENLAND
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 October 2006
The Canadian Mineralogist (2006) 44 (5): 1137–1146.
...–Dale relationship. IV. The compatibility concept and its application . Can. Mineral . 19 , 441 – 450 . Mercier , N. & Leblanc , M. ( 1993 ): Crystal growth and structures of rare earth fluorcarbonates. I. Structures of BaSm(CO 3 ) 2 F and Ba 3 La 2 (CO 3 ) 5 F 2 : revision...
FIGURES
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Image
(a) MLA mineral map of beige (left) and red (right) REE-fluorcarbonate-bear...
in New Insights into the Rare Earth Element Mineralization of the Storkwitz Carbonatite, Germany
> The Canadian Mineralogist
Published: 21 February 2023
Fig. 6. (a) MLA mineral map of beige (left) and red (right) REE-fluorcarbonate-bearing vug-like features in Mn-ankerite carbonatite clast (DE-CLO_11). (b) Photograph of DE-CLO_11 showing beige (left) and red (right) REE-fluorcarbonate-bearing vug-like features in Mn-ankerite carbonatite clast. (c
Image
(A) to (G) BSE images of REE fluorcarbonates in tailings. Syntaxial intergr...
in Okorusu tailings – Part II: REE mineralisation, and oxygen and carbon isotope variations
> South African Journal of Geology
Published: 01 September 2023
Figure 2. (A) to (G) BSE images of REE fluorcarbonates in tailings. Syntaxial intergrown REE fluorcarbonates intergrown with other carbonates ( A ), feldspar ( B ), ( C ) and ( G ), and fluorite ( D ) to ( F ). ( G ) Single bastnäsite crystal intergrown with feldspar. (H) U-bearing carbonate
Image
Combined Raman spectra of selected Okorusu REE fluorcarbonates obtained at ...
in Okorusu tailings – Part II: REE mineralisation, and oxygen and carbon isotope variations
> South African Journal of Geology
Published: 01 September 2023
Figure 6. Combined Raman spectra of selected Okorusu REE fluorcarbonates obtained at a 532 nm excitation. Inlet shows Raman spectrum of haematite. The reference Raman spectra are taken from the RRUFF data base. This data base provides data for bastnäsite (RRUFF ID 060629), parisite (RRUFF ID
Image
Field photographs of the TCC (see text for details). (a) Basement contact a...
in A preliminary study of the rare earth element-enriched Twyfelskupje carbonatite complex, southern Namibia
> Geological Magazine
Published: 19 December 2022
Fig. 4. Field photographs of the TCC (see text for details). (a) Basement contact at the base of the TK6 cone sheet, showing apophyses of carbonatite extending into the basement. Diameter of lens cap for scale is 6 cm. (b) Block of layered fluorcarbonate mineralization in carbonatite matrix
Image
a. Inclusions of REE fluorcarbonates [Bsn: bastnäsite-(Ce), Par+Syn: assem...
in HYDROTHERMAL REE MINERALIZATION IN THE AMBA DONGAR CARBONATITE COMPLEX, GUJARAT, INDIA
> The Canadian Mineralogist
Published: 01 October 2009
F ig . 4. a. Inclusions of REE fluorcarbonates [Bsn: bastnäsite-(Ce), Par+Syn: assemblages of parisite-(Ce) and synchysite-(Ce) grains] in strontianite, in weakly overprinted carbonatites. b. Crystals and grains of synchysite-(Ce) in strongly overprinted carbonatites. Note that parisite-(Ce
Journal Article
Okorusu tailings – Part II: REE mineralisation, and oxygen and carbon isotope variations
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 September 2023
South African Journal of Geology (2023) 126 (3): 315–336.
...Figure 2. (A) to (G) BSE images of REE fluorcarbonates in tailings. Syntaxial intergrown REE fluorcarbonates intergrown with other carbonates ( A ), feldspar ( B ), ( C ) and ( G ), and fluorite ( D ) to ( F ). ( G ) Single bastnäsite crystal intergrown with feldspar. (H) U-bearing carbonate...
FIGURES
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Image
Backscattered electron images of TCC samples. (a) Fibro-radial aggregates o...
in A preliminary study of the rare earth element-enriched Twyfelskupje carbonatite complex, southern Namibia
> Geological Magazine
Published: 19 December 2022
Fig. 5. Backscattered electron images of TCC samples. (a) Fibro-radial aggregates of fluorcarbonate (from TK1). (b) Radiating rhythmic alternations of barite with calcite and Fe–Mn-oxide (from TK3). (c) Bladed aggregates of apatite intergrown with carbonate and Fe- and Fe–Mn-oxides (from TK2). (d
Journal Article
ARISITE-(Ce), A NEW RARE-EARTH FLUORCARBONATE FROM THE ARIS PHONOLITE, NAMIBIA, MONT SAINT-HILAIRE AND THE SAINT-AMABLE SILL, QUEBEC, CANADA
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 June 2010
The Canadian Mineralogist (2010) 48 (3): 661–671.
...Paula C. Piilonen; Andrew M. McDonald; Joel D. Grice; Ralph Rowe; Robert A. Gault; Glenn Poirier; Mark A. Cooper; Uwe Kolitsch; Andrew C. Roberts; William Lechner; Andreas G. Palfi Abstract Arisite-(Ce), ideally NaCe 2 (CO 3 ) 2 [(CO 3 ) 1– x F 2 x ]F, is a new layered, rare-earth fluorcarbonate...
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Journal Article
The atomic arrangement of bastnäesite-(Ce), Ce(CO 3 )F, and structural elements of synchysite-(Ce), röntgenite-(Ce), and parisite-(Ce)
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 1993
American Mineralogist (1993) 78 (3-4): 415–418.
...Ni Yunxiang; John M. Hughes; Anthony N. Mariano Abstract Bastnäsite-(Ce), which yields more than half of the world's supply of rare-earth elements, is the most abundant member of the rare-earth fluorcarbonate group of minerals. We have solved the crystal structure of bastnäsite-(Ce) in space group...
Journal Article
Arisite-(La), a new REE -fluorcarbonate mineral from the Aris phonolite (Namibia), with descriptions of the crystal structures of arisite-(La) and arisite-(Ce)
Journal: Mineralogical Magazine
Published: 01 April 2010
Mineralogical Magazine (2010) 74 (2): 257–268.
...P. C. Piilonen; A. M. McDonald; J. D. Grice; M. A. Cooper; U. Kolitsch; R. Rowe; R. A. Gault; G. Poirier Abstract Arisite-(La), ideally NaLa 2 (CO 3 ) 2 [F 2x (CO 3 ) 1–x ]F, is a new layered REE -fluorcarbonate mineral from miarolitic cavities within the Aris phonolite, Namibia (IMA no. 2009-019...
FIGURES
Journal Article
HYDROTHERMAL REE MINERALIZATION IN THE AMBA DONGAR CARBONATITE COMPLEX, GUJARAT, INDIA
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 October 2009
The Canadian Mineralogist (2009) 47 (5): 1105–1116.
...F ig . 4. a. Inclusions of REE fluorcarbonates [Bsn: bastnäsite-(Ce), Par+Syn: assemblages of parisite-(Ce) and synchysite-(Ce) grains] in strontianite, in weakly overprinted carbonatites. b. Crystals and grains of synchysite-(Ce) in strongly overprinted carbonatites. Note that parisite-(Ce...
FIGURES
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Journal Article
Hot-spring and supergene lanthanide mineralization at the Buru carbonatite centre, Western Kenya
Journal: Mineralogical Magazine
Published: 01 August 2000
Mineralogical Magazine (2000) 64 (4): 663–673.
... and calcite, with parisite and synchysite existing as major replacive components of calcite down to depths of 200 m. Synchysite appears to be the more stable form of lanthanide fluorcarbonate at depths below 150 m. Oxygen isotope measurements on separated calcite concentrates from three of the Buru drill...
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Journal Article
New Insights into the Rare Earth Element Mineralization of the Storkwitz Carbonatite, Germany
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 21 February 2023
The Canadian Mineralogist (2022) 60 (6): 913–932.
...Fig. 6. (a) MLA mineral map of beige (left) and red (right) REE-fluorcarbonate-bearing vug-like features in Mn-ankerite carbonatite clast (DE-CLO_11). (b) Photograph of DE-CLO_11 showing beige (left) and red (right) REE-fluorcarbonate-bearing vug-like features in Mn-ankerite carbonatite clast. (c...
FIGURES
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Journal Article
A preliminary study of the rare earth element-enriched Twyfelskupje carbonatite complex, southern Namibia
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 19 December 2022
Geological Magazine (2023) 160 (2): 305–321.
...Fig. 4. Field photographs of the TCC (see text for details). (a) Basement contact at the base of the TK6 cone sheet, showing apophyses of carbonatite extending into the basement. Diameter of lens cap for scale is 6 cm. (b) Block of layered fluorcarbonate mineralization in carbonatite matrix...
FIGURES
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Journal Article
REPLACEMENT PROCESSES INVOLVING HIGH FIELD STRENGTH ELEMENTS IN THE T ZONE, THOR LAKE RARE-METAL DEPOSIT
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 14 July 2015
The Canadian Mineralogist (2015) 53 (1): 31–60.
... pseudomorphs. Therefore, HFSE must have been added to the pseudomorphs during fluid-mineral interaction, requiring hydrothermal mobility of HFSE. An open-space filling process may have been involved in the precipitation of HFSE minerals, including zircon, rutile, anatase, and REE fluorcarbonates. Initial...
FIGURES
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Journal Article
HRTEM investigation of bastnäsite–parisite intergrowths from Mount Malosa (Malawi): ordered sequences, polysomatic faults, polytypic disorder, and a new parisite-(Ce) polymorph
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 May 2019
European Journal of Mineralogy (2019) 31 (3): 429–442.
...Giancarlo Capitani This high-resolution transmission electron microscopy (HRTEM) investigation of (Ca, REE)-fluorcarbonates from Mount Malosa (Malawi), previously characterized by bulk techniques, is aimed at elucidating the pervasive syntactic intergrowths that commonly affect these minerals...
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Includes: Supplemental Content
Image
( A ) Variation plot of Fe and Th. ( B ) Variation plot of Fe and ΣREY. ( C...
in Okorusu tailings – Part II: REE mineralisation, and oxygen and carbon isotope variations
> South African Journal of Geology
Published: 01 September 2023
Figure 5. ( A ) Variation plot of Fe and Th. ( B ) Variation plot of Fe and ΣREY. ( C ) Variation plot of Fe and Sr. ( D ) Variation plot of Σ(Ca+Sr+Fe) and Σ(REY+Th). Minerals plotted in light-green and light-yellow colours are ideal REE fluorcarbonates for comparison. (A) to (D) All data
Journal Article
The crystal structure of parisite-(Ce), Ce 2 CaF 2 (CO 3 ) 3
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 January 2000
American Mineralogist (2000) 85 (1): 251–258.
... refinement. © 2000 American Mineralogist 2000 Parisite-(Ce), Ce 2 CaF 2 (CO 3 ) 3 , is a calcium rare earth (RE) fluorcarbonate mineral, along with bastnäsite, synchysite, and röntgenite. The RE fluorcarbonates have generated considerable interest because of the pervasive syntactic intergrowths...
FIGURES
Journal Article
Okorusu tailings – Part I: General characterisation of superficial tailings
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 September 2023
South African Journal of Geology (2023) 126 (3): 295–314.
... and Fe (hydro)oxides, whereas all other mineral phases such as baryte, pyrite, pyrochlore and REE fluorcarbonates occur in traces. The largest proportional difference between samples from the surface of the new and old tailings pertains to fluorite (average old dump: ~12 vol.%; average new dump: ~5 vol...
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