 | | Journal (article/letter/editorial) | | Zr-rich alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic...Springer-Verlag 2002 Abstract At Gordon Butte (Crazy Mountains, Montana), agpaitic nepheline±syenite pegmatites...overall evolutionary trend of clinopyroxene in the Gordon Butte rocks is from Fe-poor diopside to aegirine±augite...lamprophyllite. The evolutionary history of the Gordon Butte pegmatites can be subdivided into primary, agpaitic...titanates and REE-bearing carbonates (ancylite, calcio-ancylite, and bastnaÈsite± parisite series) are |  | | Journal (article/letter/editorial) | | Montana Mineral Locality Index Downloaded by [University of Nebraska, Lincoln] at 20:00 09 April 2015...2015 K NOWN AS THE TREASURE STATE, Montana is rich in mineral and gemstone localities. The state motto...The middle third of the state is known as the Montana alkali province where the sediments have MICHAEL...Indian Queen mine ca. 1905 at Farlin, Beaverhead County. 208 ROCKS & MINERALS Downloaded by [University...one. The mines at Butte in Silver Bow County and the Black Pine mine in Granite County have produced many |  | | Conference Paper/Abstract | | associated alkaline rocks from Gordon Butte, Crazy Mountains (Montana) Roger H. Mitchell (Lakehead University)...Alkaline igneous rocks of central and western Montana (U.S.A.) exhibit a great petrographic diversity...Alkaline parageneses of different provenance from Montana have been shown to contain a variety of rare minerals...assemblages from the Gordon Butte area, northern Crazy Mountains. At Gordon Butte, four major intrusive...the “shonkinites” include Srrich loparite-(Ce), ancylite-(Ce), and present in lesser amounts barite, wadeite |  | | Journal (article/letter/editorial) | | calcite (15–95 vol.%), subordinate hydroxylapatite, ancylite-(Ce), calcioancylite-(Ce), and minor burbankite...compositions. Crystallization of ancylite-(Ce) and calcio-ancylite-(Ce) is related to low-temperature...of contamination. Keywords: calcite, ancylite-(Ce), calcio-ancylite-(Ce), burbankite, khanneshite, nyerereite...d’hydroxylapatite, d’ancylite-(Ce) et de calcio-ancylite-(Ce), ainsi que des quantités mineures de burbankite...cristallisation de l’ancylite-(Ce) et de la calcio-ancylite-(Ce) est liée aux processus hydrothermaux à faible |  | | Journal (article/letter/editorial) | | agpaitic nepheline syenite occurring at Gordon Butte, Montana, by Chakhmouradian and Mitchell (2002)....etc.), rare earth carbonates [including ancylite-(Ce), ancylite-(La), bastnäsite-(Ce), bastnäsite-(La)]...generations are given in Roman numerals: ALa = ancylite-(La), An = analcime, BaL = barytolamprophyllite...to stage II alteration at Pilansberg. At Gordon Butte (Montana), eudialyte is partially replaced by calcium...fluids were not produced at North Qôroq and Gordon Butte, although this might be related to either the |  | Cooper, Alan F., Collins, Alice K., Palin, J. Michael, Spratt, John (2015) Mineralogical evolution and REE mobility during crystallisation of ancylite-bearing ferrocarbonatite, Haast River, New Zealand. Lithos, 216. 324-337 doi:10.1016/j.lithos.2015.01.005 | Journal (article/letter/editorial) | | evolution and REE mobility during crystallisation of ancylite-bearing ferrocarbonatite, Haast River, New Zealand...Keywords: Ferrocarbonatites Hydrothermal alteration Ancylite LREE depletion Lamprophyre-tinguaite association...contain interstitial patches dominated by calcite–ancylite–barite–monazite– thorite–albite–aeschynite–analcime...interaction with hydrothermal fluids. Late stage ancylite-rich segregations have elevated 87Sr/86Sr compositions...Paterson, 1993). This contribution describes an ancylite-bearing carbonatite (OU 81155), and explores the |  | | Journal (article/letter/editorial) | | nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana A. R. Chakhmouradian and R. H. Mitchell Department...The pegmatites at Pegmatite Peak (Bearpaw Mts., Montana) crystallized from an evolved fraction of nepheline-syenitic...minerals, ancylite-(Ce) is the most common Sr-REE host. Some discrete crystals of ancylite show significant...significant enrichment in Th (up to 6.0wt.% ThQ). Ancylite-(Ce) and bastnaesite associated with "metaloparite"...a bastnaesite-anatase intermediate zone and an ancylite rim. Fluorapatite is rare, and has very high St |  | | Journal (article/letter/editorial) | | same assemblage include titanite, loparite-(Ce), ancylite-group and chlorite-group minerals and goethite...Some crystals are partially replaced by calcio-ancylite-(Ce). The order of crystallization deduced from...titanite → cerite-(Ce) → goethite → calcite and ancylite-group minerals. In thin section, cerite-(Ce) is...and intimate association of this mineral with ancylite-(Ce). Another complication is the paucity of compositional...cerite-(Ce), Gt: goethite, Anc: ancylite-(Ce) zoned toward calcio-ancylite-(Ce), Cal: calcite. Scale bars: |  | Wu, Bin, Wen, Han-Jie, Bonnetti, Christophe, Wang, Ru-Cheng, Yang, Jin-Hui, Wu, Fu-Yuan (2019) Rinkite-(Ce) in the nepheline syenite pegmatite from the Saima alkaline complex, northeastern China: Its occurrence, alteration, and implications for REE mineralization. The Canadian Mineralogist, 57 (6) 903-924 doi:10.3749/canmin.1900042 | Journal (article/letter/editorial) | | rinkite-(Ce) relics 6 Ca-bearing strontianite 6 ancylite-(Ce) associated with a calcite matrix. These alteration...strontianite (,10 lm across) as well as a small amount of ancylite-(Ce) can be also observed in the calcite (Fig...worm-shaped Na-Ca-REE-bearing strontianite and ancylite(Ce) from calcite. (b) Elongated lamellae of rinkite-(Ce)...alteration along the rim. Abbreviations: Anc ¼ ancylite-(Ce), Bri ¼ fluorbritholite-(Ce), Cal ¼ calcite...rinkite-(Ce) relics 6 Ca-bearing strontianite 6 ancylite-(Ce). It should be noted that the unidentified |  | | Journal (article/letter/editorial) | | olekminskite, REE-carb: rare earth carbonates (ancylite, synchysite or bastnäsite), SrAp: Sr-apatite...(incl. our data), Afrikanda, Bearpaw Mountains, Gordon Butte, Eden Lake, Ilı́maussaq, Inagli, Lovozero and...nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts., Montana. Mineralogy and Petrology, 67, 85 110. Chakhmouradian...and Zr-rich pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparison between potassic |
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