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Neptunite from
Gordon Butte, Meagher County, Montana, USA


Locality type:Table/Butte
Classification
Species:Neptunite
Formula:KNa2Li(Fe2+)2Ti2[Si4O12]2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Neptunite data
Locality Data:Click here to view Gordon Butte, Meagher County, Montana, USA
Data Identifiers
Mindat Occurrence Record ID:599082
Long-form Identifier:1:3:599082:5
GUID (UUID V4):7419e5b1-f8c1-4be0-9fd6-34b0c2c629ef
References
Chakhmouradian, Anton R., Mitchell, Roger H. (2002) The mineralogy of Ba- and Zr-rich alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic and sodic agpaitic pegmatites. Contributions to Mineralogy and Petrology, 143 (1) 93-114 doi:10.1007/s00410-001-0333-6
Reference Search (possible matching items)
Chakhmouradian, Anton R., Mitchell, Roger H. (2002) The mineralogy of Ba- and Zr-rich alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic and sodic agpaitic pegmatites. Contributions to Mineralogy and Petrology, 143 (1) 93-114 doi:10.1007/s00410-001-0333-6
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...``pockets'' ®lled with calcite, ¯uorapatite, mangan-neptunite, Mn±Ti-enriched prismatic aegirine, calcium catapleiite...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
Mitchell, Roger H. (2000) The mineralogy of nepheline-syenite pegmatites and associated alkaline rocks from Gordon Butte, Crazy Mountains (Montana) CSEG Symposium, Canadian Society of Exploration Geophysicists.
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...nepheline-syenite pegmatites from the Crazy Mountains (Montana) intermediate zone containing randomly oriented
Chakhmouradian, A. R., Reguir, E. P., Mitchell, R. H. (2002) STRONTIUM-APATITE: NEW OCCURRENCES, AND THE EXTENT OF Sr-FOR-Ca SUBSTITUTION IN APATITE-GROUP MINERALS. The Canadian Mineralogist, 40 (1) 121-136 doi:10.2113/gscanmin.40.1.121
Journal (article/letter/editorial)
associated with murmanite, steenstrupine-(Ce), mangan-neptunite, and other minerals characteristic of hyperagpaitic...localities (e.g., Bearpaw Mountains and Gordon Butte in Montana) exhibit a similar compositional trend... Inagli, Ilímaussaq, Bearpaw Mountains. and Gordon Butte (Rønsbo 1989, Pekov et al. 1995, Khomyakov 1995...nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana. Mineral. Petrol. 67, 85-110. 3/28/02, 16:23 ...Zrrich alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): Comparisons between potassic
MANN, U, MARKS, M, MARKL, G (2006) Influence of oxygen fugacity on mineral compositions in peralkaline melts: The Katzenbuckel volcano, Southwest Germany. Lithos, 91 (1) 262-285 doi:10.1016/j.lithos.2005.09.004
Journal (article/letter/editorial)
1; Mitchell and Vladykin, 1996) and from Gordon Butte, Montana (Chakhmouradian and Mitchell, 2002; not...Zr-rich alkaline pegmatites from Gordon Butte, Crazy Mountains, Montana, (USA): comparisons between potassic...K., 1977. The natural occurrence of aegirine–neptunite solid solution. Contrib. Mineral. Petrol. 60,
 
Mineral and/or Locality  
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