Geochemical evolution and late re-equilibration of NaCs-rich beryl from the Koktokay #3 pegmatite (Altai, NW China)

Wang, Ru Cheng; Dong, Xiaohong; Zhang, Wen Lan; Zhang, Ai Cheng; Zhang, Hui

doi:10.1127/0935-1221/2009/0021-1936

Cited by 66 publications

(20 citation statements)

References 19 publications

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“…All data were corrected with standard ZAF correction procedures (Tables 1 and 2 and synthetic glasses were used as the standards. The detailed procedure is described in Wang et al (2009). Trace elements of zircon grains were analyzed using an Agilent 7500a ICP-MS coupled with a Resonetics RESOlution M-50 193 nm laser-ablation system (LA-ICPMS) at the State Key Laboratory of Isotope Geochemistry in the Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS).…”

Section: Methodsmentioning

confidence: 99%

“…The non-CHARAC behavior is often accompanied by the lanthanide tetrad effect resulting in curved, segmented REE patterns of both whole-rock and minerals. Both of these features are commonly seen in the zircon from highly differentiated granitic magmas that experienced intensive hydrothermal interactions or deuteric alteration (Masuda and Ikeuchi 1979;Akagi et al 1993;Bau 1996Bau , 1999Irber 1999;Veksler et al 2005), such as highly evolved leucogranite, pegmatite, and rare metal mineralized granite (Monecke et al 2002;Takahashi et al 2002;Badanina et al 2006;Van Lichtervelde et al 2009;Wang et al 2009). The REE tetrad effect has been documented not only in the bulk compositions of whole rock samples but also in the main rock-forming minerals from the mineralized unit of the Baerzhe pluton (Wang and Zhao 1997;Jahn et al 2001;Zhao et al 2002).…”

Section: Non-charac Behaviormentioning

confidence: 99%

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Geochemistry of magmatic and hydrothermal zircon from the highly evolved Baerzhe alkaline granite: implications for Zr–REE–Nb mineralization

et al. 2013

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The Baerzhe alkaline granite pluton hosts one of the largest rare metal (Zr, rare earth elements, and Nb) deposits in Asia. It contains a geological resource of about 100 Mt at 1.84 % ZrO 2 , 0.30 % Ce 2 O 3 , and 0.26 % Nb 2 O 5 . Zirconium, rare earth elements (REE), and Nb are primarily hosted by zircon, yttroceberysite, fergusonite, ferrocolumbite, and pyrochlore. Three types of zircon can be identified in the deposit: magmatic, metamict, and hydrothermal. Primary magmatic zircon grains occur in the barren hypersolvus granite and are commonly prismatic, with oscillatory zones and abundant melt and mineral inclusions. The occurrence of aegirine and fluorite in the recrystallized melt inclusions hosted in the magmatic zircon indicates that the parental magma of the Baerzhe pluton is alkali-and F-rich. Metamict zircon grains occur in the mineralized subsolvus granite and are commonly prismatic and murky with cracks, pores, and mineral inclusions. They commonly show dissolution textures, indicating a magmatic origin with later metamictization due to deuteric hydrothermal alteration. Hydrothermal zircon grains occur in mineralized subsolvus granite and are dipyramidal with quartz inclusions, with murky CL images. They have 608 to 2,502 ppm light REE and 787 to 2,521 ppm Nb, much higher than magmatic zircon. The texture and composition of the three types of zircon indicate that they experienced remobilization and recrystallization during the transition from a magmatic to a hydrothermal system. Large amounts of Zr, REE, and Nb were enriched and precipitated during the transitional period to form the giant low-grade Baerzhe Zr-REE-Nb deposit.

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Section: Methodsmentioning

confidence: 99%

Section: Non-charac Behaviormentioning

confidence: 99%

Geochemistry of magmatic and hydrothermal zircon from the highly evolved Baerzhe alkaline granite: implications for Zr–REE–Nb mineralization

et al. 2013

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“…Chemical compositions of beryl from granitic pegmatites have been presented in numerous papers; however, the research was focused chiefly on Fe-poor beryl and its Cs,Na,Li-enriched varieties and pezzottaite (e.g., Černý et al 2003a, Laurs et al 2003, Wang et al 2009, Aurisicchio et al 2012, whereas Fe,Mg-enriched beryl has been studied rather scarcely (e.g., Schaller et al 1962, Aurisicchio et al 1988, 2012, Uher et al 2010, Novák & Filip 2010. Moreover, Mössbauer spectroscopic studies of Fe in beryl (aquamarine) from granitic pegmatites in Brazil (e.g., Viana et al 2002, da Costa et al 2006) provide only very brief information about the examined samples, host pegmatites, and their mineral assemblages.…”

Section: Introductionmentioning

confidence: 99%

Iron+magnesium-Bearing Beryl From Granitic Pegmatites: An Empa, La-Icp-Ms, Mössbauer Spectroscopy, and Powder XRD Study

Přikryl¹,

Novák²,

Filip³

et al. 2014

Can Mineral

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Five samples of blue, bluish green, and green Fe,Mg-enriched beryl from Li-poor granitic pegmatites [beryl-columbite (LCT) pegmatites at Kovářová and Boněnov in the Czech Republic and Val Sissone in Italy; a primitive pegmatite at Beryller, Untersulzbachtal, Austria; and a euxenite (NYF) pegmatite from the Beryl Pit, Quadeville, Ontario] were investigated using EMPA, Mössbauer spectroscopy, LA-ICP-MS, and powder XRD diffraction. The EMPA data show highly heterogeneous (Kovářová, Val Sissone) to rather homogeneous crystals (Boněnov, Beryller, Quadeville), with high variations in Al (1.51-1.91 apfu), Mg (0.01-0.31), Fe tot (0.01-0.18), and Na (0.04-0.37). The substitution CH □ + O R 3+ ↔ CH R + + O R 2+ is dominant and supported by the powder XRD data. LA-ICP-MS revealed notable concentrations of some trace elements: Cs ≤ 7568 ppm (Kovářová), Li ≤ 928 ppm (Quadeville), Sc ≤ 2823 ppm (Val Sissone). Beryl samples have mostly comparable contents of Fe 3+ , ~ 25% at the O-site, but differ in the presence of Fe 2+ at the T(2)-site. Primitive characteristics of some examined beryl (Mg/ (Mg+Fe tot ) = 0.37-0.68 reflect low degree of fractionation of the host pegmatite (Beryller), or high degree of Mg-contamination from host metabasites in the pegmatite dikes (Kovářová, Boněnov). The concentrations and ratios of selected elements, including Fe 3+ /Fe 2+ , in beryl from these Li-poor pegmatites are not feasible for any implications of pegmatite-family affinity or degree of its fractionation except for Li; however, no evident correlation between Li and Cs contents was found.

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“…Natural minerals and synthetic glasses were used as the standards. The detailed procedure is described in Wang et al (2009).…”

Section: Major Element Compositions Of Amphibolesmentioning

confidence: 99%

Geochronology and geochemistry of the Paleoproterozoic Fe-rich mafic sills from the Zhongtiao Mountains: Petrogenesis and tectonic implications

Niu

Bao

Shan

et al. 2014

Precambrian Research

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Geochemical evolution and late re-equilibration of NaCs-rich beryl from the Koktokay #3 pegmatite (Altai, NW China)

Cited by 66 publications

References 19 publications

Geochemistry of magmatic and hydrothermal zircon from the highly evolved Baerzhe alkaline granite: implications for Zr–REE–Nb mineralization

Geochemistry of magmatic and hydrothermal zircon from the highly evolved Baerzhe alkaline granite: implications for Zr–REE–Nb mineralization

Iron+magnesium-Bearing Beryl From Granitic Pegmatites: An Empa, La-Icp-Ms, Mössbauer Spectroscopy, and Powder XRD Study

Geochronology and geochemistry of the Paleoproterozoic Fe-rich mafic sills from the Zhongtiao Mountains: Petrogenesis and tectonic implications

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