Glimmerite: Difference between revisions
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{{short description|Igneous rock}} |
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{{Infobox rock |
{{Infobox rock |
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|name= Glimmerite |
|name= Glimmerite |
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|composition=[[Biotite]] or [[phlogopite]] |
|composition=[[Biotite]] or [[phlogopite]] |
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[[File:PXL 20201210 122544957~2.jpg|thumb|Glimmerite (biotite - annite w/magnetite), Newark, DE, pegmatite /schist contact zone ]] |
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'''Glimmerite''' is an [[igneous rock]] consisting almost entirely of dark [[mica]] ([[biotite]] or [[phlogopite]]). Glimmerite has also been referred to as '''biotitite''', though the use of this term to describe phlogopite-rich rocks has been criticized.<ref name="malawi">{{cite journal|title=Malawi glimmerites|doi=10.1016/0899-5362(88)90012-7|last=Morel|first=S. W.|journal=Journal of African Earth Sciences|volume=7|year=1988|pages=987–997|issue=7/8|bibcode=1988JAfES...7..987M}}</ref> Glimmerite may contain minor [[rutile]] and [[ilmenite]], and variants of glimmerite bearing [[graphite]], [[spinel]], [[ankerite]], [[pyrite]], [[apatite]], and the [[carbonate]] minerals [[calcite]] and [[Dolomite (mineral)|dolomite]] have been described.<ref name="apatite-glimmerite">{{cite journal|title=Geochemical studies on the carbonated apatite glimmerites from Damodar Valley, India|last1=Gupta|first1=Alok K.|last2=LeMaitre|first2=R. W.|last3=Haukka|first3=M. T.|last4=Yagi|first4=Kenzo|journal=Proceedings of the Japan Academy, Series B|volume=59|issue=5|pages=113–116|year=1983|url=https://www.jstage.jst.go.jp/article/pjab1977/59/5/59_5_113/_pdf|doi=10.2183/pjab.59.113|doi-access=free}}</ref><ref name="finland-glimmerite">{{cite journal|title=Mineralogy and petrography of Siilinjärvi carbonatite and glimmerite rocks, Eastern Finland|journal=Geological Survey of Finland Report|last=Al Ani|first=Thair|volume=164|year=2013|url=http://tupa.gtk.fi/raportti/arkisto/164_2013.pdf}}</ref><ref name="graphite-glimmerite">{{cite journal|title=Origin of graphite in glimmerite and spinellite in Achankovil Shear Zone, southern India|last1=Rajesh|first=V. J.|last2=Arai|first2=Shoji|last3=Satish-Kumar|first3=M.|year=2009|journal=Journal of Mineralogical and Petrological Sciences|volume=104|pages=407–412|issue=6|url=https://www.jstage.jst.go.jp/article/jmps/104/6/104_090622d/_pdf|doi=10.2465/jmps.090622d|doi-access=free}}</ref> |
'''Glimmerite''' is an [[igneous rock]] consisting almost entirely of dark [[mica]] ([[biotite]] or [[phlogopite]]). Glimmerite has also been referred to as '''biotitite''', though the use of this term to describe phlogopite-rich rocks has been criticized.<ref name="malawi">{{cite journal|title=Malawi glimmerites|doi=10.1016/0899-5362(88)90012-7|last=Morel|first=S. W.|journal=Journal of African Earth Sciences|volume=7|year=1988|pages=987–997|issue=7/8|bibcode=1988JAfES...7..987M}}</ref> Glimmerite may contain minor [[rutile]] and [[ilmenite]], and variants of glimmerite bearing [[graphite]], [[spinel]], [[ankerite]], [[pyrite]], [[apatite]], and the [[carbonate]] minerals [[calcite]] and [[Dolomite (mineral)|dolomite]] have been described.<ref name="apatite-glimmerite">{{cite journal|title=Geochemical studies on the carbonated apatite glimmerites from Damodar Valley, India|last1=Gupta|first1=Alok K.|last2=LeMaitre|first2=R. W.|last3=Haukka|first3=M. T.|last4=Yagi|first4=Kenzo|journal=Proceedings of the Japan Academy, Series B|volume=59|issue=5|pages=113–116|year=1983|url=https://www.jstage.jst.go.jp/article/pjab1977/59/5/59_5_113/_pdf|doi=10.2183/pjab.59.113|doi-access=free|access-date=2019-03-18|archive-date=2018-10-30|archive-url=https://web.archive.org/web/20181030181440/https://www.jstage.jst.go.jp/article/pjab1977/59/5/59_5_113/_pdf|url-status=live}}</ref><ref name="finland-glimmerite">{{cite journal|title=Mineralogy and petrography of Siilinjärvi carbonatite and glimmerite rocks, Eastern Finland|journal=Geological Survey of Finland Report|last=Al Ani|first=Thair|volume=164|year=2013|url=http://tupa.gtk.fi/raportti/arkisto/164_2013.pdf|access-date=2019-03-18|archive-date=2018-11-23|archive-url=https://web.archive.org/web/20181123162106/http://tupa.gtk.fi/raportti/arkisto/164_2013.pdf|url-status=live}}</ref><ref name="graphite-glimmerite">{{cite journal|title=Origin of graphite in glimmerite and spinellite in Achankovil Shear Zone, southern India|last1=Rajesh|first=V. J.|last2=Arai|first2=Shoji|last3=Satish-Kumar|first3=M.|year=2009|journal=Journal of Mineralogical and Petrological Sciences|volume=104|pages=407–412|issue=6|url=https://www.jstage.jst.go.jp/article/jmps/104/6/104_090622d/_pdf|doi=10.2465/jmps.090622d|doi-access=free|access-date=2019-03-18|archive-date=2018-10-31|archive-url=https://web.archive.org/web/20181031115254/https://www.jstage.jst.go.jp/article/jmps/104/6/104_090622d/_pdf|url-status=live}}</ref> |
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Glimmerite was first described by Larsen and Pardee (1929).<ref name="larsen-pardee">{{cite journal|title=The stock of alkaline rocks near Libby, Montana|year=1929|issue=2|volume=37|journal=The Journal of Geology|last1=Larsen|first1=Esper S.|last2=Pardee|first2=J. T.|pages=97–112|doi=10.1086/623598|bibcode=1929JG.....37...97L}}</ref> |
Glimmerite was first described by Larsen and Pardee (1929).<ref name="larsen-pardee">{{cite journal|title=The stock of alkaline rocks near Libby, Montana|year=1929|issue=2|volume=37|journal=The Journal of Geology|last1=Larsen|first1=Esper S.|last2=Pardee|first2=J. T.|pages=97–112|doi=10.1086/623598|bibcode=1929JG.....37...97L}}</ref> |
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[[Category:Igneous rocks]] |
[[Category:Igneous rocks]] |
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{{igneous-rock-stub}} |
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Latest revision as of 15:11, 13 December 2024
| Igneous rock | |
 Glimmerite from Namibia. | |
| Composition | |
|---|---|
| Biotite or phlogopite |
Glimmerite is an igneous rock consisting almost entirely of dark mica (biotite or phlogopite). Glimmerite has also been referred to as biotitite, though the use of this term to describe phlogopite-rich rocks has been criticized.[1] Glimmerite may contain minor rutile and ilmenite, and variants of glimmerite bearing graphite, spinel, ankerite, pyrite, apatite, and the carbonate minerals calcite and dolomite have been described.[2][3][4]
Glimmerite was first described by Larsen and Pardee (1929).[5]
References
[edit]- ^ Morel, S. W. (1988). "Malawi glimmerites". Journal of African Earth Sciences. 7 (7/8): 987–997. Bibcode:1988JAfES...7..987M. doi:10.1016/0899-5362(88)90012-7.
- ^ Gupta, Alok K.; LeMaitre, R. W.; Haukka, M. T.; Yagi, Kenzo (1983). "Geochemical studies on the carbonated apatite glimmerites from Damodar Valley, India". Proceedings of the Japan Academy, Series B. 59 (5): 113–116. doi:10.2183/pjab.59.113. Archived from the original on 2018-10-30. Retrieved 2019-03-18.
- ^ Al Ani, Thair (2013). "Mineralogy and petrography of Siilinjärvi carbonatite and glimmerite rocks, Eastern Finland" (PDF). Geological Survey of Finland Report. 164. Archived (PDF) from the original on 2018-11-23. Retrieved 2019-03-18.
- ^ Rajesh, V. J.; Arai, Shoji; Satish-Kumar, M. (2009). "Origin of graphite in glimmerite and spinellite in Achankovil Shear Zone, southern India". Journal of Mineralogical and Petrological Sciences. 104 (6): 407–412. doi:10.2465/jmps.090622d. Archived from the original on 2018-10-31. Retrieved 2019-03-18.
- ^ Larsen, Esper S.; Pardee, J. T. (1929). "The stock of alkaline rocks near Libby, Montana". The Journal of Geology. 37 (2): 97–112. Bibcode:1929JG.....37...97L. doi:10.1086/623598.
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