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Mount Wisting 95300 meteorite (WSG 95300), Mount Wisting, Victoria Land, Eastern Antarctica, Antarcticai
Regional Level Types
Mount Wisting 95300 meteorite (WSG 95300)Meteorite Fall Location
Mount WistingMountain
Victoria LandRegion
Eastern AntarcticaRegion
AntarcticaContinent

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Key
Latitude & Longitude (WGS84):
86° 27' 0'' South , 165° 25' 59'' West
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:


Ordinary chondrite, unequilibrated (H3.3; S2; W1)
Found,1995; 2.733 kg

The Mount Wisting 95300 (WSG 95300) chondritic stone [14 x 10 x 9 cm] was largely covered by a brown/black fusion crust with lighter splotches and completely smooth surface when found in Antarctica. Thereafter, it was soon recognized as a moderately unequilibrated (primitive) chondrite. In thin sections its most obvious constituents are the distinct, frequently white and cream-colored olivine- and pyroxene-rich chondrules (dimensions ≤ 1.8 µm). Chondrule types are quite varied (barred, radial, porphyritic…) and the chondrules are often rimmed by small amounts of feldspathic mesostasis. Unequilibrated olivine (Fa1-21) and Ca-poor pyroxene (Fs2-17) are the predominant constituents of both the chondrules and the darker matrix. Minor amounts of Fe-Ni metal and troilite are also readily observed in reflected light within the matrix, especially near rims of larger chondrules. Olivine and pyroxene compositions are characteristic of the H (high iron) ordinary chondrite group. The distinct chondrules, moderate disequilibration, and presence of primary glass are indicative of petrologic type H3.4. Undulose extinction of olivine is indicative of very moderate shock (level S2). Weathering grade (W1) is indicated by mild rustiness, mostly around metal and sulfide grains, and by the lack of prominent oxide veining.

Recent studies of WSG 95300 have searched for relicts of the early solar nebula and even pre-solar components. One interesting study of primitive chondrites revealed some unusual pre-solar spinel. Unfortunately the two grains were derived from a mix of WSG 95300 and 2 other meteorites so that the actual meteoritic host remains unknown!

Regions containing this locality

Antarctic PlateTectonic Plate

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Standard Detailed Strunz Dana Chemical Elements

Mineral List


2 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:

'Fayalite-Forsterite Series'
Description: Olivine composition (Fa1-21).
Reference: Satterwhite, C. & Lindstrom, M.-eds. (1997) Antarctic Meteorite Newsletter 20(1). Johnson Space Center: Houston. (Feb 1997).; Grossman, J.N. (1998). The Meteoritical Bulletin, No. 82, 1998 July. Meteoritics & Planetary Science 33 (4,Suppl.): A221-A239. (July 1998).; Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.
Forsterite
Formula: Mg2SiO4
Description: Forsterite — Olivine grains in Fa1-9 mol% range constitute Forsterite, sensu strictu.
Reference: Satterwhite, C. & Lindstrom, M.-eds. (1997) Antarctic Meteorite Newsletter 20(1). Johnson Space Center: Houston. (Feb 1997).; Grossman, J.N. (1998). The Meteoritical Bulletin, No. 82, 1998 July. Meteoritics & Planetary Science 33 (4,Suppl.): A221-A239. (July 1998).; Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.
'Glass'
Reference: Satterwhite, C. & Lindstrom, M.-eds. (1997) Antarctic Meteorite Newsletter 20(1). Johnson Space Center: Houston. (Feb 1997).
'Limonite'
Formula: (Fe,O,OH,H2O)
Description: Weathering grade A/B indicative of readily noted rustiness from hydrated iron oxides.
Reference: Grossman, J.N. (1998). The Meteoritical Bulletin, No. 82, 1998 July. Meteoritics & Planetary Science 33 (4,Suppl.): A221-A239. (July 1998).
'Meteoritic Iron'
Reference: Satterwhite, C. & Lindstrom, M.-eds. (1997) Antarctic Meteorite Newsletter 20(1). Johnson Space Center: Houston. (Feb 1997).
'Pyroxene Group'
Description: Pyroxene composition (Fs2-17) indicates that 'pyroxene' includes either (mineralogically undescribed) clinoenstatite or clinoenstatite sensu strictu (Fs 2-9) as well as the normal 'orthobronzite' or 'clinobronzite' which, along with olivine, chemically dominate H chondrites.
Reference: Satterwhite, C. & Lindstrom, M.-eds. (1997) Antarctic Meteorite Newsletter 20(1). Johnson Space Center: Houston. (Feb 1997).; Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.
Troilite
Formula: FeS
Reference: Satterwhite, C. & Lindstrom, M.-eds. (1997) Antarctic Meteorite Newsletter 20(1). Johnson Space Center: Houston. (Feb 1997).; Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Troilite2.CC.10FeS
Group 9 - Silicates
Forsterite9.AC.05Mg2SiO4
Unclassified Minerals, Rocks, etc.
'Fayalite-Forsterite Series'-
'Glass'-
'Limonite'-(Fe,O,OH,H2O)
'Meteoritic Iron'-
'Pyroxene Group'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Troilite2.8.9.1FeS
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Forsterite51.3.1.2Mg2SiO4
Unclassified Minerals, Mixtures, etc.
'Fayalite-Forsterite Series'-
'Glass'-
'Limonite'-(Fe,O,OH,H2O)
'Meteoritic Iron'-
'Pyroxene Group'-

List of minerals for each chemical element

HHydrogen
H Limonite(Fe,O,OH,H2O)
OOxygen
O ForsteriteMg2SiO4
O Limonite(Fe,O,OH,H2O)
MgMagnesium
Mg ForsteriteMg2SiO4
SiSilicon
Si ForsteriteMg2SiO4
SSulfur
S TroiliteFeS
FeIron
Fe TroiliteFeS
Fe Limonite(Fe,O,OH,H2O)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Satterwhite, C. & Lindstrom, M.-eds. (1997) Antarctic Meteorite Newsletter 20(1). Johnson Space Center: Houston. (Feb 1997).
Grossman, J.N. (1998). The Meteoritical Bulletin, No. 82, 1998 July. Meteoritics & Planetary Science 33 (4,Suppl.): A221-A239. (July 1998).
Lofgren, G.E., Le, L. & Schatz, V. (1999) Partial Melting of WSG95300: A Type 3 UOC (abstract): Lunar and Planetary Science Conference XXX, abs#1742. (Mar 1999).
Zega, T.J., Nittler, L.R., Gyngard, F., Alexander, C.M. O.'D., Stroud, R.M. & Zinner, E.K. (2014) A transmission electron microscopy study of presolar spinel: G&CA. (Jan 2014).
Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.

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