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Yamato 75097 meteorite (Y-75097), Queen Fabiola Mts (Yamato Mts), Queen Maud Land, Eastern Antarctica, Antarcticai
Regional Level Types
Yamato 75097 meteorite (Y-75097)Meteorite Fall Location
Queen Fabiola Mts (Yamato Mts)Mountain Range
Queen Maud Land- not defined -
Eastern AntarcticaRegion
AntarcticaContinent

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Key
Latitude & Longitude (WGS84):
71° 30' South , 35° 40' East
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:


Ordinary chondrite, shocked and brecciated (L6,br; S5; W1)
Found,1975; 2.5702 kg

Yamato 75097 is one of several meteorites collected during a joint US-Japan expedition. The meteorite is seen to have chondritic textures with indistinct chondrules and chondrule fragments exhibiting extensive integration onto the groundmass. The primary phases are olivine (Fa 24.1) and pyroxene (Fs 20.1) accompanied by minor amounts of plagioclase, merrillite, Fe-Ni metal, and troilite. Relic chondrules include barred, porphyritic, and radial types (BO, PO, POP, RP). Fe-Ni metal and troilite are often pooled at interstices of relic chondrules. Olivine composition is indicative of the L (low iron) geochemical group; silicate equilibration and chondrule integration are indicative of the petrologic type L6 classification. Thin black veinlets, maskelynite, and the fractured, mosaicized olivine are all indicative of strong pre-terrestrial shock (level S5). Weathering is minimal (level W1).

Several unusual clasts have been studied within the Y-75907 meteorite including both Brachina-like and H chondrite-type inclusions. The H-type inclusion has an apparent Ar-40 degassing age of ~490 Ma perhaps indicating a collisional history separate from other components of the meteorite. In addition, similar compositions, cosmic ray exposure ages (~17 Ma) and C-14 ages (~1.5 ka) for Y-75907 and several additional meteorites found nearby all appear to confirm the supposition that they are all members of a single meteorite shower.

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


3 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:

'Albite-Anorthite Series'
Reference: Kaneoka, I., Takaoka, N. & and Yanai, K. (1988) 40Ar-39 Ar Analyses of Yamato-75097 (L6) Chondrite from Antarctica: Proc. NIPR Symp.Antarct. Meteorites, 1, 206-214 (1988).
Chromite
Formula: Fe2+Cr3+2O4
Reference: Yanai, K., Kojima, H., Matsumoto, Y. (1983) A Brachina-like inclusion in the Yamato-75097 L6 chondrite - A preliminary examination: Symposium on Antarctic Meteorites, 8th: National Institute of Polar Research, Memoirs, Special Issue 30: 29-35. (Dec 1983).
'Fayalite-Forsterite Series'
Reference: Yanai, K., Kojima, H., Matsumoto, Y. (1983) A Brachina-like inclusion in the Yamato-75097 L6 chondrite - A preliminary examination: Symposium on Antarctic Meteorites, 8th: National Institute of Polar Research, Memoirs, Special Issue 30: 29-35. (Dec 1983).; Kaneoka, I., Takaoka, N. & and Yanai, K. (1988) 40Ar-39 Ar Analyses of Yamato-75097 (L6) Chondrite from Antarctica: Proc. NIPR Symp.Antarct. Meteorites, 1, 206-214 (1988).; Minami, M., Terui, A. Takaoka, N. & Nakamura, T. (2006) An improved extraction system to measure carbon-14 terrestrial ages of meteorites and pairing of the Antarctic Yamato-75097 group chondrites: MAPS 41 (4): 529-540. (Apr 2006).; Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pp.
'Maskelynite'
Reference: Yanai, K., Kojima, H., Matsumoto, Y. (1983) A Brachina-like inclusion in the Yamato-75097 L6 chondrite - A preliminary examination: Symposium on Antarctic Meteorites, 8th: National Institute of Polar Research, Memoirs, Special Issue 30: 29-35. (Dec 1983).; Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pp.
Merrillite
Formula: Ca9NaMg(PO4)7
Reference: Yanai, K., Kojima, H., Matsumoto, Y. (1983) A Brachina-like inclusion in the Yamato-75097 L6 chondrite - A preliminary examination: Symposium on Antarctic Meteorites, 8th: National Institute of Polar Research, Memoirs, Special Issue 30: 29-35. (Dec 1983).; Kaneoka, I., Takaoka, N. & and Yanai, K. (1988) 40Ar-39 Ar Analyses of Yamato-75097 (L6) Chondrite from Antarctica: Proc. NIPR Symp.Antarct. Meteorites, 1, 206-214 (1988).; Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pp.
'Meteoritic Iron'
Reference: Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pp.
'Pyroxene Group'
Reference: Minami, M., Terui, A. Takaoka, N. & Nakamura, T. (2006) An improved extraction system to measure carbon-14 terrestrial ages of meteorites and pairing of the Antarctic Yamato-75097 group chondrites: MAPS 41 (4): 529-540. (Apr 2006).; Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pp.
Troilite
Formula: FeS
Reference: Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pp.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Troilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Group 8 - Phosphates, Arsenates and Vanadates
Merrillite8.AC.45Ca9NaMg(PO4)7
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Fayalite-Forsterite Series'-
'Maskelynite'-
'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 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
(AB)3(XO4)2
Merrillite38.3.4.4Ca9NaMg(PO4)7
Unclassified Minerals, Mixtures, etc.
'Albite-Anorthite Series'-
'Fayalite-Forsterite Series'-
'Maskelynite'-
'Meteoritic Iron'-
'Pyroxene Group'-

List of minerals for each chemical element

OOxygen
O ChromiteFe2+Cr23+O4
O MerrilliteCa9NaMg(PO4)7
NaSodium
Na MerrilliteCa9NaMg(PO4)7
MgMagnesium
Mg MerrilliteCa9NaMg(PO4)7
PPhosphorus
P MerrilliteCa9NaMg(PO4)7
SSulfur
S TroiliteFeS
CaCalcium
Ca MerrilliteCa9NaMg(PO4)7
CrChromium
Cr ChromiteFe2+Cr23+O4
FeIron
Fe ChromiteFe2+Cr23+O4
Fe TroiliteFeS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Yanai, K., Kojima, H., Matsumoto, Y. (1983) A Brachina-like inclusion in the Yamato-75097 L6 chondrite - A preliminary examination: Symposium on Antarctic Meteorites, 8th: National Institute of Polar Research, Memoirs, Special Issue 30: 29-35. (Dec 1983).
Kaneoka, I., Takaoka, N. & and Yanai, K. (1988) 40Ar-39 Ar Analyses of Yamato-75097 (L6) Chondrite from Antarctica: Proc. NIPR Symp.Antarct. Meteorites, 1, 206-214 (1988).
Minami, M., Terui, A. Takaoka, N. & Nakamura, T. (2006) An improved extraction system to measure carbon-14 terrestrial ages of meteorites and pairing of the Antarctic Yamato-75097 group chondrites: MAPS 41 (4): 529-540. (Apr 2006).
Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pp.

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