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nordmarkite

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Journal Article

Zircon Alteration as a Proxy for Rare Earth Element Mineralization Processes in Carbonatite-Nordmarkite Complexes of the Mianning-Dechang Rare Earth Element Belt, China Available to Purchase

Yan Liu, Zengqian Hou, Rongqing Zhang, Ping Wang, Jianfeng Gao, Markus B. Raschke
Journal: Economic Geology
Published: 01 June 2019
Economic Geology (2019) 114 (4): 719–744.
DOI: https://doi.org/10.5382/econgeo.4660
...Yan Liu; Zengqian Hou; Rongqing Zhang; Ping Wang; Jianfeng Gao; Markus B. Raschke Abstract Zircon is a common accessory mineral in igneous rocks, including carbonatite-nordmarkite complexes. Zircons can record radiation damage and hydrothermal alteration through changes in oxygen isotope values...
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View PDF for article title, Zircon Alteration as a Proxy for Rare Earth Element Mineralization Processes in Carbonatite-<span class="search-highlight">Nordmarkite</span> Complexes of the Mianning-Dechang Rare Earth Element Belt, China
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Journal Article

Iron knebelite from the nordmarkite of Shefford Mountain, Quebec Available to Purchase

Thomas Frisch
Published: 01 April 1972
The Canadian Mineralogist (1972) 11 (2): 552–553.
View PDF for article title, Iron knebelite from the <span class="search-highlight">nordmarkite</span> of Shefford Mountain, Quebec
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Outcrop photographs of nordmarkite. (A) Barite-fluorite-quartz vein in nordmarkite, Maoniuping deposit (modified from Liu et al., 2015a). (B) Biotite-aegirine-augite-arfvedsonite-bastnäsite–bearing ore veins, Maoniuping deposit (modified from Liu and Hou, 2017). (C) Nordmarkite from orebody No. 1, Dalucao deposit, showing crosscutting, coarse-grained, barite-fluorite-quartz veins (modified from Liu and Hou, 2017). (D) Weathered ores from orebody No. 1, Dalucao deposit. (E) Fresh nordmarkite, lower Lizhuang deposit (modified from Liu and Hou, 2017). (F) Altered nordmarkite, Lizhuang deposit (modified from Liu et al., 2015a).

Outcrop photographs of nordmarkite. (A) Barite-fluorite-quartz vein in nord... Available to Purchase

Published: 01 June 2019
Fig. 3. Outcrop photographs of nordmarkite. (A) Barite-fluorite-quartz vein in nordmarkite, Maoniuping deposit (modified from Liu et al., 2015a ). (B) Biotite-aegirine-augite-arfvedsonite-bastnäsite–bearing ore veins, Maoniuping deposit (modified from Liu and Hou, 2017 ). (C) Nordmarkite from
Image
OM-CL image of a zircon grain from a nordmarkite sample from Khaldzan Buregte, Mongolia, showing a turquoise tint of luminescence caused by significant Dy3+ emission as revealed by SEM-CL spectroscopy.

OM-CL image of a zircon grain from a nordmarkite sample from Khaldzan Bureg... Available to Purchase

Published: 01 August 2008
F ig . 13. OM-CL image of a zircon grain from a nordmarkite sample from Khaldzan Buregte, Mongolia, showing a turquoise tint of luminescence caused by significant Dy 3+ emission as revealed by SEM-CL spectroscopy.
Image
Transmitted-light microscopic images of zircons from the Mianning-Dechang REE belt. (A, B) Type I zircons in nordmarkite. (C) Type II zircons in nordmarkite with a slightly dusty appearance. (D) Type III zircons in nordmarkite exhibiting heavy alteration and cloudy inner regions.

Transmitted-light microscopic images of zircons from the Mianning-Dechang R... Available to Purchase

Published: 01 June 2019
Fig. 4. Transmitted-light microscopic images of zircons from the Mianning-Dechang REE belt. (A, B) Type I zircons in nordmarkite. (C) Type II zircons in nordmarkite with a slightly dusty appearance. (D) Type III zircons in nordmarkite exhibiting heavy alteration and cloudy inner regions.
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Plots of (A) SiO2 versus Na2O + K2O (after Middlemost, 1994), (B) SiO2 versus Na2O + K2O + CaO (after Frost et al., 2001), (C) SiO2 versus K2O (after Peccerillo and Taylor, 1976), and (D) A/CNK versus A/NK for fresh nordmarkite, nordmarkite after fenitization, and nordmarkite after REE mineralization—which contain type I, II, and III zircons, respectively—in the Mianning-Dechang REE deposits.

Plots of (A) SiO 2 versus Na 2 O + K 2 O (after Middlemost, 1994 ), (B) S... Available to Purchase

Published: 01 June 2019
Fig. 12. Plots of (A) SiO 2 versus Na 2 O + K 2 O (after Middlemost, 1994 ), (B) SiO 2 versus Na 2 O + K 2 O + CaO (after Frost et al., 2001 ), (C) SiO 2 versus K 2 O (after Peccerillo and Taylor, 1976 ), and (D) A/CNK versus A/NK for fresh nordmarkite, nordmarkite after fenitization
Journal Article

The structure of the Marumbe ring- complex, Nuanetsi igneous province, Southern Rhodesia Free

Richard Langdon Johnson
Published: 01 May 1964
Geological Magazine (1964) 101 (3): 274–281.
...Richard Langdon Johnson Abstract "The Marumbe complex is a small ring-intrusion consisting essentially of a plug of nordmarkite separated from the basalt country rocks by a later ring-dyke and roof-sheet of granite. The lower and upper surfaces of a screen of basalt, which lies between the top...
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Journal Article

The Origin and Evolution of Rare Earth Element Mineralization in the Muluozhai Deposit (Sichuan, China): Insights from Mineralogical, Trace Element, and Sr-Nd-Pb-C-O-Ca Isotope Data Open Access

Yan Liu, Anton R. Chakhmouradian, Ekaterina P. Reguir, Zengqian Hou, Xu Zheng, Haobang Fu, Jian Sun
Journal: Economic Geology
Published: 01 May 2024
Economic Geology (2024) 119 (3): 681–712.
DOI: https://doi.org/10.5382/econgeo.5066
..., Sichuan (southwestern China), is characterized by a complex vein system that evolved within metamorphosed supracrustal rocks of the Yangxin and Mount Emei Formations. The mineralization is coeval with Oligocene intrusions of carbonatite and nordmarkite at ~27 Ma. The major gangue minerals include fluorite...
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View PDF for article title, The Origin and Evolution of Rare Earth Element Mineralization in the Muluozhai Deposit (Sichuan, China): Insights from Mineralogical, Trace Element, and Sr-Nd-Pb-C-O-Ca Isotope Data
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Schematic model of the formation of type I, II, and III zircons and REE mineralization stages in the Mianning-Dechang REE deposits. (A) In the fresh carbonatite-nordmarkite complex (stage I), type I zircons are fresh and unaltered. (B) In the fenitized carbonatite-nordmarkite complex (stage II), type II zircons were altered by fluids composed of magmatic and meteoric waters, which were rich in Na, K, Cl, F, CO2, and Ba but undersaturated with REEs. (C) In the REE-mineralized and altered carbonatite-nordmarkite complex (stage III), type III zircons interacted with highly evolved ore-forming fluids with high contents of Na, K, F, Cl, SO42−, U, Th, Hf, and Ce. From stages I to III, the Th, U, Pb, REE, F, Cl, SO42−, and Hf contents of ore-forming fluids increased and the ore-forming fluid temperatures decreased.

Schematic model of the formation of type I, II, and III zircons and REE min... Available to Purchase

Published: 01 June 2019
Fig. 16. Schematic model of the formation of type I, II, and III zircons and REE mineralization stages in the Mianning-Dechang REE deposits. (A) In the fresh carbonatite-nordmarkite complex (stage I), type I zircons are fresh and unaltered. (B) In the fenitized carbonatite-nordmarkite complex
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(A) Simplified geologic map showing the distribution of carbonatite-alkaline complexes and associated REE orebodies within the Maoniuping deposit (modified from Hou et al., 2009). (B) Geologic map of the Muluozhai ore district (Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, unpub. data, 2008). (C) Schematic geologic map showing the key features of the nordmarkite-carbonatite complex and associated REE orebodies within the Lizhuang deposit (modified from Hou et al., 2009). (D) Geologic map showing the key features of the nordmarkite-carbonatite complex and associated REE orebodies within the Dalucao deposit (modified from Yang, unpub. data, 1998).

(A) Simplified geologic map showing the distribution of carbonatite-alkalin... Available to Purchase

Published: 01 June 2019
, Chinese Academy of Geological Sciences, unpub. data, 2008). (C) Schematic geologic map showing the key features of the nordmarkite-carbonatite complex and associated REE orebodies within the Lizhuang deposit (modified from Hou et al., 2009 ). (D) Geologic map showing the key features of the nordmarkite
Journal Article

Magmatic and metasomatic processes during formation of the Nb-Zr-REE deposits Khaldzan Buregte and Tsakhir (Mongolian Altai); indications from a combined CL-SEM study Available to Purchase

U. Kempe, J. Goetze, S. Dandar, D. Habermann
Published: 01 April 1999
Mineralogical Magazine (1999) 63 (2): 165–177.
...U. Kempe; J. Goetze; S. Dandar; D. Habermann Cathodoluminescence (CL) imaging and spectroscopy, as well as backscattered electron imaging, were used to assign the occurrence of several mineral phases and rock structures in altered nordmarkites and calcite-bearing granites from the Nb-Zr-REE...
View PDF for article title, Magmatic and metasomatic processes during formation of the Nb-Zr-REE deposits Khaldzan Buregte and Tsakhir (Mongolian Altai); indications from a combined CL-SEM study
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Journal Article

Devitrified Felsite Dikes from Ascutney Mountain, Vermont Available to Purchase

Robert Balk, Philip Krieger
Published: 01 August 1936
American Mineralogist (1936) 21 (8): 516–522.
...Robert Balk; Philip Krieger Abstract The stock of gabbro and nordmarkite penetrating the ancient gneisses and phyllites of Ascutney mountain, Vermont, is associated with various dike rocks. Among the leucocratic types, and probably connected with the nordmarkite, Daly 1 describes paisanitic dikes...
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Photomicrographs showing the key textural characteristics of ore veins and wall-rock xenoliths in the Zhengjialiangzi camp. (A, B) Typical vein material comprising deformed and fragmented bastnäsite (Bsn) plates embedded in barite, calcite (Cal), or fluorite (Fl); note microcline xenocrysts (Mc) in (A). (C) Coarse-grained sparry Sr-rich barite (Brt1) replaced by a cavernous aggregate of fine-grained Sr-poor variety (Brt2). (D, E) Fenitized nordmarkite xenoliths, composed of quartz (Qtz), microcline replaced and overgrown by albite (Ab), and diopside-aegirine-augite (Cpx) replaced by fluororichterite (Frc); note accessory titanite (Ttn) and galena (Ga). (F) Fenitized nordmarkite xenolith showing variation in cathodoluminescence from blue in magmatic microcline to olive green in metasomatized microcline-perthite rims (Mcp) to bright red in metasomatic albite. (G) Fenitized greenschist consisting of albite replaced and overgrown by microcline, fluorophlogopite (Fphl), and accessory Fe-Ti oxides (Ox). Images (A, B, D) were taken in cross-polarized light, (C, G) in backscattered electrons, image (E) in plane-polarized light, and (F) in cold-cathode electrons.

Photomicrographs showing the key textural characteristics of ore veins and ... Open Access

Published: 01 May 2024
xenocrysts (Mc) in (A). (C) Coarse-grained sparry Sr-rich barite (Brt1) replaced by a cavernous aggregate of fine-grained Sr-poor variety (Brt2). (D, E) Fenitized nordmarkite xenoliths, composed of quartz (Qtz), microcline replaced and overgrown by albite (Ab), and diopside-aegirine-augite (Cpx) replaced
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SHRIMP zircon U-Pb ages for nordmarkites from (A, B) Maoniuping (type II), (C) Diaoloushan (types I, II), and (D) Lizhuang (types I, III) deposits. MSWD = mean standard of weighted deviates.

SHRIMP zircon U-Pb ages for nordmarkites from (A, B) Maoniuping (type II), ... Available to Purchase

Published: 01 June 2019
Fig. 10. SHRIMP zircon U-Pb ages for nordmarkites from (A, B) Maoniuping (type II), (C) Diaoloushan (types I, II), and (D) Lizhuang (types I, III) deposits. MSWD = mean standard of weighted deviates.
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Histograms of SHRIMP U-Pb zircon ages for nordmarkites from (A) Dalucao (type I zircons), (B) Maoniuping (types I and II zircons), (C) Lizhuang (types I and III zircons), and (D) Diaoloushan (types I and II zircons) deposits.

Histograms of SHRIMP U-Pb zircon ages for nordmarkites from (A) Dalucao (ty... Available to Purchase

Published: 01 June 2019
Fig. 15. Histograms of SHRIMP U-Pb zircon ages for nordmarkites from (A) Dalucao (type I zircons), (B) Maoniuping (types I and II zircons), (C) Lizhuang (types I and III zircons), and (D) Diaoloushan (types I and II zircons) deposits.
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Radiogenic isotopic compositions of ore veins, nordmarkites, and marbles from the Zhengjialiangzi camp (this work) and other carbonatite occurrences. (A) Sr-Nd isotope variations. (B) Pb isotope variations. (C) Nd-Pb isotope variations. The compositions of carbonatites from East Africa, Bayan Obo (northern China), Laiwu (eastern China), potassic rocks from the Yangtze craton, and typical marine sediments are added for comparison. Mantle end members: DMM = depleted mid-ocean ridge-type mantle, HIMU = high-μ mantle, EM I = enriched mantle I, EM II = enriched mantle II (Hart, 1984). Pb isotope data for bastnäsite are from Jia and Liu (2020). LZ = Lizhuang, MNP = Maoniuping, ZJLZ = Zhengjialiangzi.

Radiogenic isotopic compositions of ore veins, nordmarkites, and marbles fr... Open Access

Published: 01 May 2024
Fig. 12. Radiogenic isotopic compositions of ore veins, nordmarkites, and marbles from the Zhengjialiangzi camp (this work) and other carbonatite occurrences. (A) Sr-Nd isotope variations. (B) Pb isotope variations. (C) Nd-Pb isotope variations. The compositions of carbonatites from East Africa
Journal Article

The minor intrusions of Assynt, NW Scotland: early development of magmatism along the Caledonian Front Available to Purchase

K. M. Goodenough, B. N. Young, I. Parsons
Published: 01 August 2004
Mineralogical Magazine (2004) 68 (4): 541–559.
DOI: https://doi.org/10.1180/0026461046840207
... always obscured due to a lack of exposure. The petrography of the minor intrusions was described briefly by Sabine (1953) . The following section summarizes his work, together with our new observations. This suite of intrusions was termed “nordmarkitic rocks’’ by Sabine (1953...
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U–Pb geochronology of the Eocene Kærven intrusive complex, East Greenland: constraints on the Iceland hotspot track during the rift-to-drift transition Available to Purchase

SIGURJÓN B. THÓRARINSSON, PAUL M. HOLM, SEBASTIAN TAPPE, LARRY M. HEAMAN, NIELS-OLE PRÆGEL
Published: 03 July 2015
Geological Magazine (2016) 153 (1): 128–142.
DOI: https://doi.org/10.1017/S0016756815000448
... nordmarkite zone of the Kangerlussuaq Syenite. This study presents the first U–Pb zircon ages from the alkaline units of the Kærven Complex. Fourteen multi-grain zircon fractions have been analysed by thermal ionization mass spectrometry (TIMS). Absolute age differences could not be resolved between...
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View PDF for article title, U–Pb geochronology of the Eocene Kærven intrusive complex, East Greenland: constraints on the Iceland hotspot track during the rift-to-drift transition
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Journal Article

The peralkaline granite-related Khaldzan-Buregtey rare metal (Zr, Nb, REE) deposit, western Mongolia Available to Purchase

V. I. Kovalenko, G. M. Tsaryeva, A. V. Goreglyad, V. V. Yarmolyuk, V. A. Troitsky, R. L. Hervig, G. L. Farmer
Journal: Economic Geology
Published: 01 May 1995
Economic Geology (1995) 90 (3): 530–547.
DOI: https://doi.org/10.2113/gsecongeo.90.3.530
..., as shown by the development of a major dike complex synchronous with granite emplacement. The massif consists of peralkaline granitoids, as well as gabbro and basalt, and is characterized by a radial-circular shape. Eight intrusive phases are recognized and consist of (1) nordmarkite, (2) peralkaline...
View PDF for article title, The peralkaline granite-related Khaldzan-Buregtey rare metal (Zr, Nb, REE) deposit, western Mongolia
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Journal Article

Contact metamorphism of layered shale-carbonate sequences in the Oslo Rift; III, The nature of skarn-forming fluids Available to Purchase

Bjorn Jamtveit, Tom Andersen
Journal: Economic Geology
Published: 01 November 1993
Economic Geology (1993) 88 (7): 1830–1849.
DOI: https://doi.org/10.2113/gsecongeo.88.7.1830
... activity leading to skarn formation and locally to ore deposition in the contact aureoles. Stable isotope and fluid inclusion data have been used to constrain the composition and evolution of skarn-forming fluids at a roof pendant situated on the eastern margin of the large Nordmarkite (syenite) batholith...
View PDF for article title, Contact metamorphism of layered shale-carbonate sequences in the Oslo Rift; III, The nature of skarn-forming fluids
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