SUPPORT US. If mindat.org is important to you, click here to donate to our Fall 2019 fundraiser!
Log InRegister
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 ElementsBooks & Magazines
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 MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

Neptune Mountains meteorite, Neptune Mountains, Pensacola Mts, Coats Land, Eastern Antarctica, Antarcticai
Regional Level Types
Neptune Mountains meteoriteMeteorite Fall Location
Neptune MountainsMountain Range
Pensacola MtsMountain Range
Coats Land- not defined -
Eastern AntarcticaRegion
AntarcticaContinent

This page is currently not sponsored. Click here to sponsor this page.
Key
Latitude & Longitude (WGS84):
83° 15' South , 55° 0' West
Latitude & Longitude (decimal):
Köppen climate type:


Iron meteorite, coarsest octahedrite (IAB,Ogg)
Find, 1964; 1.07 kg

The Neptune Mountains iron meteorite (7.0-7.4%Ni; ~0.5 %Co) was the fourth meteorite to be recovered from Antarctica. At the time it was noted that the meteorite had probably had been glacially transported. It was found on a rock outcrop about 30 m above the ice base of nunatake by members of an U. S. Antarctic research expedition. Neptune Mountains Fe-Ni metal is almost entirely kamacite [taenite-and-plessite ~3 vol%]. Neumann bands and martensite are indicative of significant preterrestrial shock. While schreibersite is prominent, troilite and other accessory minerals [if present] have not been studied in any detail in the more accessible literature. While Buchwald (1975) reported that the meteorite was surprisingly intact upon his initial studies, later studies (1989) revealed several varied instances of chemical corrosion. Neptune Mountains' terrestrial exposure age (~110 ka) was one of the early indications that some Antarctic meteorites have lain on or underneath the ice for enormous periods of time. Under the current classification scheme Neptune Mountains is listed in the very large IAB complex of iron meteorites.

A few years after the discovery of Neptune Mountains Japanese scientists somewhat unexpectedly discovered nine more meteorites on the ice within a very small area. Since then, of course, a virtual eventual flood of Antarctic meteorites have been recovered.

What's in a name? Neptune Mountains seems to be a very appropriate name for a meteorite recovered from such an unusually cold and desolate location. As meteorites are almost always named after terrestrial landmarks, very few meteorites are given 'planetary' names but a few are known (e.g., Venus and Marsland from the United States and Nuevo Mercurio from Mexico).

Regions containing this locality

Antarctic PlateTectonic Plate
Antarctic MeteoritesGroup of Meteorite Fall Locations

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


7 valid minerals.

Meteorite/Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Akaganeite
Formula: (Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2O
Reference: Buchwald, V. & Clark Jr, R.S. (1989) Corrosion of Fe-Ni alloys by Cl-containing akaganéite (β-FeOOH): The Antarctic meteorite case. American Mineralogist 74(5&6):656-667. (May-June1989).
Goethite
Formula: α-Fe3+O(OH)
Reference: Buchwald, V. & Clark Jr, R.S. (1989) Corrosion of Fe-Ni alloys by Cl-containing akaganéite (β-FeOOH): The Antarctic meteorite case. American Mineralogist 74(5&6):656-667. (May-June1989).
Iron
Formula: Fe
Reference: Krinov, E. L. - Editor (1965) The Meteoritical Bulletin, No. 34. Moscow: USSR. (Nov 1965).; Buchwald, V. F. (1975). Handbook of Iron Meteorites: Their History, Distribution, Composition and Structure, Vol.3. Univ. of California Press: Berkley. 1418 pages.
Iron var: Kamacite
Formula: (Fe,Ni)
Reference: Krinov, E. L. - Editor (1965) The Meteoritical Bulletin, No. 34. Moscow: USSR. (Nov 1965).; Buchwald, V. F. (1975). Handbook of Iron Meteorites: Their History, Distribution, Composition and Structure, Vol.3. Univ. of California Press: Berkley. 1418 pages.
Iron var: Martensite
Formula: Fe
Reference: Buchwald, V. F. (1975). Handbook of Iron Meteorites: Their History, Distribution, Composition and Structure, Vol.3. Univ. of California Press: Berkley. 1418 pages.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Buchwald, V. F. (1975). Handbook of Iron Meteorites: Their History, Distribution, Composition and Structure, Vol.3. Univ. of California Press: Berkley. 1418 pages.
Maghemite
Formula: (Fe3+0.670.33)Fe3+2O4
Reference: Buchwald, V. & Clark Jr, R.S. (1989) Corrosion of Fe-Ni alloys by Cl-containing akaganéite (β-FeOOH): The Antarctic meteorite case. American Mineralogist 74(5&6):656-667. (May-June1989).
'Plessite'
Reference: Buchwald, V. F. (1975). Handbook of Iron Meteorites: Their History, Distribution, Composition and Structure, Vol.3. Univ. of California Press: Berkley. 1418 pages.
Schreibersite
Formula: (Fe,Ni)3P
Reference: Buchwald, V. F. (1975). Handbook of Iron Meteorites: Their History, Distribution, Composition and Structure, Vol.3. Univ. of California Press: Berkley. 1418 pages.
Taenite
Formula: (Fe,Ni)
Reference: Krinov, E. L. - Editor (1965) The Meteoritical Bulletin, No. 34. Moscow: USSR. (Nov 1965).; Buchwald, V. F. (1975). Handbook of Iron Meteorites: Their History, Distribution, Composition and Structure, Vol.3. Univ. of California Press: Berkley. 1418 pages.
Troilite
Formula: FeS
Description: Sparse, but ovoid surface depression (2x3cM) due to atmospheric ablation present.
Reference: Buchwald, V. F. (1975). Handbook of Iron Meteorites: Their History, Distribution, Composition and Structure, Vol.3. Univ. of California Press: Berkley. 1418 pages.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Iron1.AE.05Fe
var: Kamacite1.AE.05(Fe,Ni)
var: Martensite1.AE.05Fe
Schreibersite1.BD.05(Fe,Ni)3P
Taenite1.AE.10(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
Troilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
Akaganeite4.DK.05(Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2O
Goethite4.00.α-Fe3+O(OH)
Maghemite4.BB.15(Fe3+0.670.33)Fe3+2O4
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)
'Plessite'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Iron
var: Kamacite
1.1.11.1(Fe,Ni)
Schreibersite1.1.21.2(Fe,Ni)3P
Taenite1.1.11.2(Fe,Ni)
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Troilite2.8.9.1FeS
Group 4 - SIMPLE OXIDES
A2X3
Maghemite4.3.7.1(Fe3+0.670.33)Fe3+2O4
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Akaganeite6.1.6.1(Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2O
Goethite6.1.1.2α-Fe3+O(OH)
Unclassified Minerals, Mixtures, etc.
Iron-Fe
var: Martensite-Fe
'Limonite'-(Fe,O,OH,H2O)
'Plessite'-

List of minerals for each chemical element

HHydrogen
H Limonite(Fe,O,OH,H2O)
H Akaganeite(Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2O
H Goethiteα-Fe3+O(OH)
OOxygen
O Limonite(Fe,O,OH,H2O)
O Akaganeite(Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2O
O Goethiteα-Fe3+O(OH)
O Maghemite(Fe3+0.670.33)Fe23+O4
PPhosphorus
P Schreibersite(Fe,Ni)3P
SSulfur
S TroiliteFeS
ClChlorine
Cl Akaganeite(Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2O
FeIron
Fe Iron (var: Kamacite)(Fe,Ni)
Fe Taenite(Fe,Ni)
Fe Limonite(Fe,O,OH,H2O)
Fe Iron (var: Martensite)Fe
Fe Schreibersite(Fe,Ni)3P
Fe TroiliteFeS
Fe Akaganeite(Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2O
Fe Goethiteα-Fe3+O(OH)
Fe Maghemite(Fe3+0.670.33)Fe23+O4
Fe IronFe
NiNickel
Ni Iron (var: Kamacite)(Fe,Ni)
Ni Taenite(Fe,Ni)
Ni Schreibersite(Fe,Ni)3P
Ni Akaganeite(Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2O

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Krinov, E. L. - Editor (1965) The Meteoritical Bulletin, No. 34. Moscow: USSR. (Nov 1965).
Buchwald, V. F. (1975). Handbook of Iron Meteorites: Their History, Distribution, Composition and Structure, Vol.3. Univ. of California Press: Berkley. 1418 pages.
Sears, D. (1979) Meteorites recently discovered in Antarctica may date from the earliest days of the solar system. New Scientist. pp. 959-961. (22 Mar 1979).
Graham, A. L., Bevan, A. W. R. & Hutchison, B. (1985) Catalogue of Meteorites (4/e). University of Arizona Press: Tucson.
Buchwald, V. & Clark Jr, R.S. (1989) Corrosion of Fe-Ni alloys by Cl-containing akaganéite (β-FeOOH): The Antarctic meteorite case. American Mineralogist 74(5&6):656-667. (May-June1989).
Jarosewich, E. (1990) Chemical analyses of meteorites - A compilation of stony and iron meteorite analyses. Meteoritics 25(4): 323-337. (Dec. 1990).
Wasson, J.T & Kallemeyn, G. W. (2002) The IAB iron-meteorite complex: A group, five subgroups, numerous grouplets, closely related, mainly formed by crystal segregation in rapidly cooling melts. Geochimica et Cosmochimica Acta, Volume 66, Issue 13, p. 2445-2473. (July 2002)

External Links



This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 19, 2019 16:51:22 Page generated: August 24, 2019 09:06:56
Go to top of page