Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Aenigmatite from Saint Helena， Ascension and Tristan da Cunha

Saint Helena， Ascension and Tristan da Cunha
 
Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4
Jicha, B. R., Singer, B. S., & Valentine, M. J. (2013). 40Ar/39Ar geochronology of subaerial Ascension Island and a re-evaluation of the temporal progression of basaltic to rhyolitic volcanism. Journal of Petrology, 54(12), 2581-2596. doi.org/10.1093/petrology/egt058
Kar, A., Weaver, B.L., Davidson, J., Colucci, M. (1998) Origin of differentiated volcanic and plutonic rocks from Ascension Island, South Atlantic Ocean. Journal of Petrology: 39(5): 1009-1024. doi.org/10.1093/petroj/39.5.1009
Weaver, B.L., Kar, A., Davidson, J., Colucci, M. (1996) Geochemical characteristics of volcanic rocks from Ascension Island, South Atlantic Ocean. Geothermics: 25(4-5): 449-470.
Harris, C., Sheppard, S.M.F. (1987) Magma and fluid evolution in the lavas and associated granite xenoliths of Ascension Island. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 269-272.
Weaver, B.L., Wood, D.A., Tarney, J., Joron, J.-L. (1987) Geochemistry of ocean island basalts from the South Atlantic Ocean: Ascension, Bouvet, St. Helena, Gough and Tristan da Cunha. In: Alkaline Igneous Rocks (Fitton, J.G., Upton, B.G.J. eds.), Geological Society of London: Special Publication 30: 253-267.
Weis, D., Demaiffe, D., Cauet, S., Javoy, M. (1987) Sr, Nd, O and H isotopic ratios in Ascension Island lavas and plutonic inclusions
Harris, C. (1985) Guano-derived rare earth-rich phosphatic amygdales in gabbroic inclusions from Ascension Island. Earth and Planetary Science Letters: 72(1): 141-148.
Sheppard, S.M.F., Harris, C. (1985) Hydrogen and oxygen isotope geochemistry of Ascension Island lavas and granites: Variation with crystal fractionation and interaction with sea water. Contributions to Mineralogy and Petrology: 91(1): 74-81.
Harris, C. (1983) The petrology of lavas and associated plutonic inclusions of Ascension Island. Journal of Petrology: 24(4): 424-470. doi.org/10.1093/petrology/24.4.424
C. Harris, G. Cressey, J. D. Bell, F. B. Atkins and S. Beswetherick (1982) An Occurrence of Rare-Earth-Rich Eudialyte from Ascension Island, South Atlantic. Mineralogical Magazine 46:421-425.
Mineralogical Magazine(1952) 29, 850-857
Kawabata, H., Hanyu, T., Chang, Q., Kimura, J. I., Nichols, A. R., & Tatsumi, Y. (2011). The petrology and geochemistry of St. Helena alkali basalts: evaluation of the oceanic crust-recycling model for HIMU OIB. Journal of Petrology, 52(4), 791-838. doi.org/10.1093/petrology/egr003
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Chaffey, D. J., Cliff, R. A., & Wilson, B. M. (1989). Characterization of the St Helena magma source. Geological Society, London, Special Publications, 42(1), 257-276. doi.org/10.1144/GSL.SP.1989.042.01.16
BAKER, IAN (1969) Petrology of the Volcanic Rocks of Saint Helena Island, South Atlantic. Geological Society of America Bulletin, 80 (7) 1283 doi:10.1130/0016-7606(1969)80[1283:potvro]2.0.co;2
Baker, I. (1968). Intermediate oceanic volcanic rocks and the ‘Daly gap’. Earth and Planetary Science Letters, 4(2), 103-106. doi.org/10.1016/0012-821X(68)90002-2
BAKER, I. (1968). Compositional variation of minor intrusions and the form of a volcano magma chamber. Quarterly Journal of the Geological Society, 124(1-4), 67-79. doi.org/10.1144/gsjgs.124.1.0067
Baker, I., Gale, N. H., & Simons, J. (1967). Geochronology of the St Helena volcanoes. Nature, 215(5109), 1451-1456. doi.org/10.1038/2151451a0
 
Mineral and/or Locality  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: April 25, 2024 08:17:36
Go to top of page