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LCT-type pegmatite

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Journal Article

Bulk Composition of Mt. Mica Pegmatite, Maine, USA: IMPLICATIONS For the Origin of an Lct Type Pegmatite By Anatexis Available to Purchase

William Simmons, Alexander Falster, Karen Webber, Encarnación Roda-Robles, Andrew P. Boudreaux, Leah Rae Grassi, Gary Freeman
Published: 01 July 2016
The Canadian Mineralogist (2016) 54 (4): 1053–1070.
DOI: https://doi.org/10.3749/canmin.1600017
... of the SMD. Batches of anatectic melt accumulated and coalesced into a larger volume that subsequently formed the pegmatite. This is the first chemical evidence presented for the formation of an LCT type pegmatite by direct anatexis. §   Corresponding author e-mail address : [email protected] 2...
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View PDF for article title, Bulk Composition of Mt. Mica <span class="search-highlight">Pegmatite</span>, Maine, USA: IMPLICATIONS For the Origin of an <span class="search-highlight">Lct</span> <span class="search-highlight">Type</span> <span class="search-highlight">Pegmatite</span> By Anatexis
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Journal Article

Tourmaline geochemical and boron isotopic constraints on the magmatic-hydrothermal transition and Li mineralization in LCT-type pegmatites Available to Purchase

Wenjing Li, Bin Chen, Xiaodong Chen, Yang Sun, Shuaijie Liu
Journal: GSA Bulletin
Published: 19 February 2025
GSA Bulletin (2025) 137 (7-8): 3021–3036.
DOI: https://doi.org/10.1130/B37859.1
...Wenjing Li; Bin Chen; Xiaodong Chen; Yang Sun; Shuaijie Liu Abstract The magmatic-hydrothermal transition in LCT-type pegmatites, which are enriched in lithium (Li), cesium (Cs), and tantalum (Ta), has received international attention because rare metal (e.g., Li) minerals reach saturation...
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View PDF for article title, Tourmaline geochemical and boron isotopic constraints on the magmatic-hydrothermal transition and Li mineralization in <span class="search-highlight">LCT</span>-<span class="search-highlight">type</span> <span class="search-highlight">pegmatites</span>
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Journal Article

Lithium Potential of the Indian Granitic Pegmatites Available to Purchase

Yamuna Singh
Published: 01 July 2022
Jour. Geol. Soc. India (2022) 98 (7): 917–925.
DOI: https://doi.org/10.1007/s12594-022-2095-x
... imagery and spectro-radiometric analysis, mapping of pegmatite veins may be carried out. As the LCT-type pegmatites are sourced mostly from previously un-melted, mica-enriched metamorphic rocks, muscovite and biotite groups of mica host bulk of the trace elements and thus fingerprint for the LCT-type...
View PDF for article title, Lithium Potential of the Indian Granitic <span class="search-highlight">Pegmatites</span>
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Global locations of important LCT-type pegmatites, with a list of main Li minerals. References: 1 = Anderson et al. (2013); 2 = Bynoe (2014); 3 = Stilling et al. (2006) and Selway et al. (2000); 4 = Potter et al. (2009); 5 = Tindle and Breaks (2000); 6 = Sirbescu et al. (2009); 7 = Marchal et al. (2014); 8 = London and Burt (1982a); 9 = Chakoumakos and Lumpkin (1990); 10 = Kesler (1961); 11 = Shigley and Brown (1985); 12 = Jolliff et al. (1987); 13 = Viana et al. (2007); 14 = Viana et al. (2007); 15 = Lagache and Quéméneur (1997); 16 = Galliski et al. (1999); 17 = Galliski et al. (2008); 18 = Oyarzábal et al. (2009); 19 = Galliski et al. (1999); 20 = Kesler et al. (2012); 21 = Badanina et al. (2015); 22 = Černý et al. (2004); 23 = Whitworth and Rankin (1989); 24 = Novák and Černý (1998); 25 = Lazić et al. (2009); 26 = Černý et al. (1989); 27 = Tonarini et al. (1998); 28 = Roda-Robles et al. (2016); 29 = Mohammedyasin (2017); 30 = Hulsbosch and Muchez (2020); 31 = Akoh et al. (2015); 32 = Yang et al. (2020); 33 = Rijks and van der Veen (1972); 34 = Novák et al. (2015); 35 = Černý et al. (2003); 36 = Baldwin et al. (2005); 37 = Grew et al. (2018); 38 = Thomas et al. (1994); 39 = Seltmann et al. (2010); 40 = Seltmann et al. (2010); 41 = Kuznetsova and Prokof’ev (2009); 42 = Peretyazhko et al. (2004); 43 = Sokol et al. (2010); 44 = Zou and Li (2006); 45 = Peters (2011); 46 = Yin et al. (2020); 47 = this study; 48 = Matsubara et al. (1995); 49 = Liu et al. (2020); 50 = Chou and Li (2014); 51 = Li et al. (2020); 52 = Rao et al. (2017); 53 = Pal et al. (2007); Suwimonprecha et al. (1995); 55 = Sweetapple et al. (2001); 56 = Partington et al. (1995); 57 = Dittrich et al. (2014); 58 = Sweetapple et al. (2019). Abbreviations: Ptl (petalite); Spd (spodumene); Mbs (montebrasite); Aby (amblygonite); Lhp (lithiophilite); Trp (triphylite); Elb (elbaite); Lpd (lepidolite). (Color online.)

Global locations of important LCT-type pegmatites, with a list of main Li m... Available to Purchase

Published: 01 December 2022
Figure 8. Global locations of important LCT-type pegmatites, with a list of main Li minerals. References: 1 = Anderson et al. (2013) ; 2 = Bynoe (2014) ; 3 = Stilling et al. (2006) and Selway et al. (2000) ; 4 = Potter et al. (2009) ; 5 = Tindle and Breaks (2000) ; 6 = Sirbescu et al
Journal Article

Glacial dispersal of indicator minerals from the Brazil Lake lithium–caesium–tantalum pegmatites, SW Nova Scotia, Canada Open Access

M. Beth McClenaghan, Denise M. Brushett, Roger C. Paulen, Christopher E. Beckett-Brown, Jessey M. Rice
Published: 31 March 2025
Geochemistry: Exploration, Environment, Analysis (2025) 25 (1): geochem2024-047.
DOI: https://doi.org/10.1144/geochem2024-047
...M. Beth McClenaghan; Denise M. Brushett; Roger C. Paulen; Christopher E. Beckett-Brown; Jessey M. Rice The Brazil Lake lithium-caesium-tantalum (LCT)-type pegmatites (North, South and Army Road pegmatites) in eastern Canada, were the focus of a detailed till study to document glacial dispersal...
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View PDF for article title, Glacial dispersal of indicator minerals from the Brazil Lake lithium–caesium–tantalum <span class="search-highlight">pegmatites</span>, SW Nova Scotia, Canada
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Journal Article

GRANITIC PEGMATITES OF THE O’GRADY BATHOLITH, N.W.T., CANADA: A CASE STUDY OF THE EVOLUTION OF THE ELBAITE SUBTYPE OF RARE-ELEMENT GRANITIC PEGMATITE Available to Purchase

T. Scott Ercit, Lee A. Groat, Robert A. Gault
Published: 01 February 2003
The Canadian Mineralogist (2003) 41 (1): 117–137.
DOI: https://doi.org/10.2113/gscanmin.41.1.117
..., they grade toward a distinct LCT-type signature (elbaite-bearing). The melts parental to the pegmatite bodies were more voluminous, more alkaline, less aluminous and less reduced than is the norm for melts parental to LCT-type pegmatite. Differentiation of these melts sequentially produced hornblende granite...
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View PDF for article title, GRANITIC <span class="search-highlight">PEGMATITES</span> OF THE O’GRADY BATHOLITH, N.W.T., CANADA: A CASE STUDY OF THE EVOLUTION OF THE ELBAITE SUBTYPE OF RARE-ELEMENT GRANITIC <span class="search-highlight">PEGMATITE</span>
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Journal Article

Textural and Mineralogical Evolution of the Little Nahanni Pegmatite Group (NWT, Canada) with Implications for Metasomatism, Rare-Metal Mineralization, and Pegmatite–Wall Rock Interaction Available to Purchase

Jérémie D. Pfister, Daniel J. Kontak, Lee A. Groat
Published: 20 July 2023
The Canadian Journal of Mineralogy and Petrology (2023) 61 (3): 467–505.
DOI: https://doi.org/10.3749/2000086
...Jérémie D. Pfister; Daniel J. Kontak; Lee A. Groat Abstract Situated in the Northwest Territories (Canada), the Cretaceous ( ca . 85 Ma) Little Nahanni Pegmatite Group is an LCT-type pegmatite swarm enriched in Li, Sn, and Ta. Displaying intensive albitization associated with rare-metal...
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View PDF for article title, Textural and Mineralogical Evolution of the Little Nahanni <span class="search-highlight">Pegmatite</span> Group (NWT, Canada) with Implications for Metasomatism, Rare-Metal Mineralization, and <span class="search-highlight">Pegmatite</span>–Wall Rock Interaction
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Journal Article

MINERALOGY AND GEOCHEMISTRY OF PHOSPHATES AND SILICATES IN THE SAPUCAIA PEGMATITE, MINAS GERAIS, BRAZIL: GENETIC IMPLICATIONS Available to Purchase

Maxime Baijot, Frédéric Hatert, Simon Philippo
Published: 01 December 2012
The Canadian Mineralogist (2012) 50 (6): 1531–1554.
DOI: https://doi.org/10.3749/canmin.50.6.1531
... is a weakly fractionated and geochemically primitive LCT-type pegmatite. The degree of differentiation of the pegmatite increases from the border to the core, as shown by a decrease of Fe/(Fe + Mn) in olivine-type phosphates, which decreases from 0.75 in the IWZ, to 0.71 in the IZ. Muscovite and tourmaline...
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View PDF for article title, MINERALOGY AND GEOCHEMISTRY OF PHOSPHATES AND SILICATES IN THE SAPUCAIA <span class="search-highlight">PEGMATITE</span>, MINAS GERAIS, BRAZIL: GENETIC IMPLICATIONS
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Journal Article

GEOCHEMISTRY, MINERALOGY, AND EVOLUTION OF Li-Al MICAS AND FELDSPARS FROM THE MOUNT MICA PEGMATITE, MAINE, USA Available to Purchase

Karen L. Marchal, William B. Simmons, Alexander U. Falster, Karen L. Webber, Encarnación Roda-Robles
Published: 01 April 2014
The Canadian Mineralogist (2014) 52 (2): 221–233.
DOI: https://doi.org/10.3749/canmin.52.2.221
...Karen L. Marchal; William B. Simmons; Alexander U. Falster; Karen L. Webber; Encarnación Roda-Robles Abstract Mount Mica is a poorly zoned, sodic LCT-type pegmatite consisting dominantly of quartz, albite, and muscovite in the outer portion of the pegmatite. Micas are the principal K minerals...
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View PDF for article title, GEOCHEMISTRY, MINERALOGY, AND EVOLUTION OF Li-Al MICAS AND FELDSPARS FROM THE MOUNT MICA <span class="search-highlight">PEGMATITE</span>, MAINE, USA
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Journal Article

Mineralogy and Geochemistry of Alkali Beryl from the Rare Metal Bearing Pegmatites of Marlagalla-Allapatna, Mandya District, Karnataka Available to Purchase

Chanchal Sarbajna, R. P. Sinha, P. Krishnamurthy, K. V. G. Krishna, R. Viswanathan, D. C. Banerjee
Published: 01 December 1999
Jour. Geol. Soc. India (1999) 54 (6): 599–608.
DOI: https://doi.org/10.17491/jgsi/1999/540603
... oxide (c. 11 % BeO) compared to normal beryl. Beryl occurs mostly between graphic intermediate zone and quartz core in the complexly zoned, spodumene-bearing Li-Cs-Ta (LCT) type pegmatites in this area. The average value (n = 7) for alkali beryl from this area are Na 2 O 1.26%, Li 2 O 0.6%, Cs 2 O, 0.74...
View PDF for article title, Mineralogy and Geochemistry of Alkali Beryl from the Rare Metal Bearing <span class="search-highlight">Pegmatites</span> of Marlagalla-Allapatna, Mandya District, Karnataka
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Journal Article

Tsilaisite, NaMn 3 Al 6 (Si 6 O 18 )(BO 3 ) 3 (OH) 3 OH, a new mineral species of the tourmaline supergroup from Grotta d’Oggi, San Pietro in Campo, island of Elba, Italy Available to Purchase

Ferdinando Bosi, Henrik Skogby, Giovanna Agrosì, Eugenio Scandale
Published: 01 May 2012
American Mineralogist (2012) 97 (5-6): 989–994.
DOI: https://doi.org/10.2138/am.2012.4019
...Ferdinando Bosi; Henrik Skogby; Giovanna Agrosì; Eugenio Scandale Abstract Tsilaisite, NaMn 3 Al 6 (Si 6 O 18 )(BO 3 ) 3 (OH) 3 OH, is a long-expected new mineral of the tourmaline supergroup. It occurs in an aplitic dike of a LCT-type pegmatite body from Grotta d’Oggi, San Pietro in Campo, island...
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View PDF for article title, Tsilaisite, NaMn 3 Al 6 (Si 6 O 18 )(BO 3 ) 3 (OH) 3 OH, a new mineral species of the tourmaline supergroup from Grotta d’Oggi, San Pietro in Campo, island of Elba, Italy
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Fluor-tsilaisite, NaMn 3 Al 6 (Si 6 O 18 )(BO 3 ) 3 (OH) 3 F, a new tourmaline from San Piero in Campo (Elba, Italy) and new data on tsilaisitic tourmaline from the holotype specimen locality Available to Purchase

Ferdinando Bosi, Giovanni B. Andreozzi, Giovanna Agrosì, Eugenio Scandale
Published: 01 February 2015
Mineralogical Magazine (2015) 79 (1): 89–101.
DOI: https://doi.org/10.1180/minmag.2015.079.1.08
...Ferdinando Bosi; Giovanni B. Andreozzi; Giovanna Agrosì; Eugenio Scandale Abstract Fluor-tsilaisite, NaMn 3 Al 6 (Si 6 O 18 )(BO 3 ) 3 (OH) 3 F, is a new mineral of the tourmaline supergroup. It occurs in an aplitic dyke of a LCT-type pegmatite body from Grotta d'Oggi, San Piero in Campo, Elba...
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View PDF for article title, Fluor-tsilaisite, NaMn 3 Al 6 (Si 6 O 18 )(BO 3 ) 3 (OH) 3 F, a new tourmaline from San Piero in Campo (Elba, Italy) and new data on tsilaisitic tourmaline from the holotype specimen locality
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Comparison between some of the chemical features of the monazite-(Ce) and x... Available to Purchase

Published: 25 June 2019
). Mineral Monazite Monazite Xenotime Xenotime (Volta Grande) (Förster, 1998 a ) (Volta Grande) (Förster, 1998 b ) Rock host LCT-type pegmatite S-type Li-mica granites LCT-type pegmatite S-type Li-mica granites Host mineral Fluorapatite Li-mica or feldspar Fluorapatite Biotite
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Overview of tourmaline δ11B composition for the LCPB pegmatites. Results are compared with tourmalines from LCT-type pegmatites (Peg.) in the Conlara (CMC) and Pringles (PMC) metamorphic complex, S-type granites in the CMC, as well as tourmalinites and tourmaline schists from outside the batholith in the CMC (Ordovician basement data from Montenegro et al. 2021).

Overview of tourmaline δ 11 B composition for the LCPB pegmatites. Results ... Available to Purchase

Published: 22 February 2022
Fig. 11. Overview of tourmaline δ 11 B composition for the LCPB pegmatites. Results are compared with tourmalines from LCT-type pegmatites (Peg.) in the Conlara (CMC) and Pringles (PMC) metamorphic complex, S-type granites in the CMC, as well as tourmalinites and tourmaline schists from outside
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(A) The Li2O–Al2O3–SiO2 phase diagram after London (1984) used for LCT-type pegmatite systems along with bounding isochores for H2O–CO2 fluid inclusions hosted in quartz and spodumene from LNPG (Burns 2019). The stages of pegmatite evolution (1→2→3→4) are discussed in the text. Note that the cooling path in PT space is approximate. (B) Back scattered electron image of an LNPG sample showing initial spodumene (Spd) surrounded by SQUI (spodumene-quartz intergrowth) which is followed by quartz (Qtz)–muscovite (Ms).

(A) The Li 2 O–Al 2 O 3 –SiO 2 phase diagram after London (1984) used fo... Available to Purchase

Published: 20 July 2023
Fig. 15. (A) The Li 2 O–Al 2 O 3 –SiO 2 phase diagram after London (1984) used for LCT-type pegmatite systems along with bounding isochores for H 2 O–CO 2 fluid inclusions hosted in quartz and spodumene from LNPG ( Burns 2019 ). The stages of pegmatite evolution (1→2→3→4) are discussed
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Comparison between the chemical signature of the fluorapatite from the pegm... Available to Purchase

Published: 25 June 2019
Table 4. Comparison between the chemical signature of the fluorapatite from the pegmatite body A of the Volta Grande mine and the apatite from felsic I-type and S-type granites (Sha and Chappel, 1999 ), LCT-type pegmatites (Cao et al. , 2013 ) and shoshonitic to high-K calc-alkaline granitic
Journal Article

Textural and isotopic studies of the Cretaceous Little Nahanni pegmatite group (NWT, Canada) suggests mixed fluid reservoirs during its evolution Available to Purchase

Jérémie D. Pfister, Daniel J. Kontak, Lee Groat, Mostafa Fayek
Published: 30 September 2019
The Canadian Mineralogist (2019) 57 (5): 771–773.
DOI: https://doi.org/10.3749/canmin.AB00018
... Pegmatite Group (LNPG) is an LCT-type pegmatite swarm enriched in Li, Sn and Ta. Although studied in the past, the origin of this pegmatite group, as well as its internal evolution, remains poorly understood. The dike swarm consists of 200+ sub-vertical dikes intruding a suite of metasedimentary units...
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NATURE AND ORIGIN OF AN LCT-SUITE PEGMATITE WITH LATE-STAGE SODIUM ENRICHMENT, BRAZIL LAKE, YARMOUTH COUNTY, NOVA SCOTIA. II. IMPLICATIONS OF STABLE ISOTOPES (δ 18 O, δD) FOR MAGMA SOURCE, INTERNAL CRYSTALLIZATION AND NATURE OF SODIUM METASOMATISM Available to Purchase

Daniel J. Kontak, T. Kurtis Kyser
Published: 01 August 2009
The Canadian Mineralogist (2009) 47 (4): 745–764.
DOI: https://doi.org/10.3749/canmin.47.4.745
...Daniel J. Kontak; T. Kurtis Kyser Abstract The 395 Ma Brazil Lake granitic pegmatite, a rare occurrence of an LCT-type (Li–Cs–Ta) pegmatite in the Meguma Terrane of Nova Scotia, Canada, is hosted by metasedimentary and metavolcanic rocks of the Silurian White Rock Group. Previous mineralogical...
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View PDF for article title, NATURE AND ORIGIN OF AN <span class="search-highlight">LCT</span>-SUITE <span class="search-highlight">PEGMATITE</span> WITH LATE-STAGE SODIUM ENRICHMENT, BRAZIL LAKE, YARMOUTH COUNTY, NOVA SCOTIA. II. IMPLICATIONS OF STABLE ISOTOPES (δ 18 O, δD) FOR MAGMA SOURCE, INTERNAL CRYSTALLIZATION AND NATURE OF SODIUM METASOMATISM
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Age distribution of different pegmatite types worldwide and resources of Li and high-purity quartz. Simplified from McCauley and Bradley (2014). (A) LCT pegmatites. (B) NYF pegmatites. (C) Li resources in LCT pegmatites. (D) Highpurity quartz (with &lt;50 ppm impurities) resources in NYF pegmatites. Abbreviations: LCT = lithium-cesium-tantalum, NYF = niobium-yttrium-fluorine.

Age distribution of different pegmatite types worldwide and resources of Li... Open Access

Published: 01 May 2025
Fig. 5. Age distribution of different pegmatite types worldwide and resources of Li and high-purity quartz. Simplified from McCauley and Bradley ( 2014 ). (A) LCT pegmatites. (B) NYF pegmatites. (C) Li resources in LCT pegmatites. (D) Highpurity quartz (with <50 ppm impurities) resources
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THE PATTERNS OF ENRICHMENT IN FELSIC PEGMATITES ULTIMATELY DEPEND ON TECTONIC SETTING Available to Purchase

Robert F. Martin, Caterina De Vito
Published: 01 December 2005
The Canadian Mineralogist (2005) 43 (6): 2027–2048.
DOI: https://doi.org/10.2113/gscanmin.43.6.2027
... setting; in contrast, NYF (Nb–Y–F-enriched) pegmatites, are affiliated with anorogenic suites, formed in an extensional setting, and really not fundamentally different in petrogenetic lineage from suites in silica-undersaturated systems, including carbonatites. Both LCT and NYF types involve magmas...
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