Antarctic Meteorite Petrographic Description

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Sample Petrographic Description

Sample Number

MAC 02837

Newsletter

27,1

Location

MacAlpine Hills

Field Number

14702

Dimensions (cm)

8.0 x 5.5 x 3.5

Weight (g)

188.64

Original Classification

EL3 Chondrite

Pairing

MAC 02837; MAC 02839

Mineral Composition (%Fa & %Fs)

Ferrosilite (mol%): 0-1

Weathering

Fracturing

Macroscopic Description - Kathleen McBride

50% brown/black fractured fusion crust covers the exterior of these meteorites. The interiors are heavily fractured and very rusty. MAC 02837 was broken into many pieces.

Thin Section Description (,2) - Linda Welzenbach, Tim McCoy

The sections show an aggregate of chondrules (up to 1 mm), chondrule fragments, and pyroxene grains in a matrix of about 30% metal and sulfide. Several chondrules contain olivine. Weathering is light, with little staining of enstatite grains and minor alteration of metal and sulfides. Microprobe analyses show the orthopyroxene is Fs_0-6 and metal contains 0.7 wt.% Si. The meteorites are EL3 chondrites and are almost certainly paired.

Antarctic Meteorite Images for Sample MAC 02837

Field Photo(s) :

ANSMET MAC 02837 - Field Number: 14702, NASA Photo Number: jsc2018e103329

Field photo image(s) courtesy of the ANSMET (ANtarctic Search for METeorites) Program, Case Western Reserve University and the University of Utah

Antarctic Meteorite Images for Sample MAC 02837

Lab Photo(s) :

Lab Photo of Sample MAC 02837 Showing North View

Lab Photo of Sample MAC 02837 Showing South View

References for Sample MAC02837

Hellmann, J.L., Hopp, T., Burkhardt, C., Becker, H., Fischer-Godde, M., and Kleine, T., 2021, Tellurium isotope cosmochemistry: Implications for volatile fractionation in chondrite parent bodies and origin of the late veneer. , Geochimica et Cosmochimica Acta, 309 , 313–328 , https://doi.org/10.1016/j.gca.2021.06.038 .

Bouvier, A., Boyet, M., 2016, Primitive Solar System materials and Earth share a common initial 142Nd abundance. , Nature, 537(7620) , 399-402 .

Defouilloy, C., Cartigny, P., Assayag, N., Moynier, F., Barrat, J. A., 2016, High-precision sulfur isotope composition of enstatite meteorites and implications of the formation and evolution of their parent bodies. , Geochimica et Cosmochimica Acta, 172 , 393-409 .

Barrat, J. A., Zanda, B., Jambon, A., Bollinger, C., 2014, The lithophile trace elements in enstatite chondrites. , Geochimica et Cosmochimica Acta, 128 , 1-Mar-14 , 71-94 , ISSN 0016-7037 , http://dx.doi.org/10.1016/j.gca.2013.11.042 .

Lehner, S. W., Petaev, M. I., Zolotov, M. Y., Buseck, P. R., 2013, Formation of niningerite by silicate sulfidation in EH3 enstatite chondrites. , Geochimica et Cosmochimica Acta, 101 , 15-Jan-13 , 34-56 , ISSN 0016-7037 , http://dx.doi.org/10.1016/j.gca.2012.10.003 .

Van Niekerk, D., Keil, K., 2011, Metal/sulfide-silicate intergrowth textures in EL3 meteorites: Origin by impact melting on the EL parent body. , Meteoritics & Planetary Science, 46 , 1484-1497 , http://dx.doi.org/10.1111/j.1945-5100.2011.01244.x .

Izawa, R. M., Flemming, R. L., Banerjee, N. R., Mccausland, J. A., 2011, Micro-X-ray diffraction assessment of shock stage in enstatite chondrites. , Meteoritics & Planetary Science, 46 , 638-651 , http://dx.doi.org/10.1111/j.1945-5100.2011.01180.x .

Yokoyama, T., Alexander, C. M. O'D., Walker, R. J., 2011, Assessment of nebular versus parent body processes on presolar components present in chondrites: Evidence from osmium isotopes. , Earth and Planetary Science Letters, 305 Issues 1-2 , 1-May-11 , 115-123 , ISSN 0012-821X , http://dx.doi.org/10.1016/j.epsl.2011.02.046 .

Van Acken, D., Brandon, A. D., Humayun, M., 2011, High-precision osmium isotopes in enstatite and Rumuruti chondrites. , Geochimica et Cosmochimica Acta, 75 Issue 14 , 15-Jul-11 , 4020-4036 , ISSN 0016-7037 , http://dx.doi.org/10.1016/j.gca.2011.04.019 .

Izawa, R. M., King, P. L., Flemming, R. L., Peterson, R. C., Mccausland, P. J. A., 2010, Mineralogical and spectroscopic investigation of enstatite chondrites by X-ray diffraction and infrared reflectance spectroscopy. , Journal of Geophysical Research: Planets, 115 , E07008 , http://dx.doi.org/10.1029/2009JE003452 .

Antarctic Meteorite Petrographic Description

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