Sample Petrographic Description
Sample Number | MIL 07671 |
Newsletter | 32,1 |
Location | Miller Range |
Field Number | 17972 |
Dimensions (cm) | 3.5 x 2.5 x 1.5 |
Weight (g) | 19.42 |
Original Classification | CV3 Chondrite |
Updated Classification | CV 3.7 Chondrite Oxidized A |
Pairing | MIL 07590; MIL 07002; MIL 07385; MIL 07403; MIL 07669; MIL 07671; MIL 07678; MIL 07681; MIL 07683; MIL 07684; MIL 07685; MIL 07686; MIL 07690; MIL 07691; MIL 07694; MIL 07696; MIL 07698; MIL 07699; MIL 090072; MIL 090170; MIL 090171; MIL 090172; MIL 090173; MIL 090174; MIL 090175; MIL 090176; MIL 090177; MIL 090178; MIL 090179; MIL 090184; MIL 091010; MIL 11206; MIL 15306; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 0-9;Ferrosilite (mol%): 1 | |
Weathering | |
Be | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The fusion crust on these paired meteorites ranges from none to 20% purplish black with fractures. The interiors range in colors from brown to gray to black with evaporites. Abundant multicolored chondrules are visible. | |
Thin Section Description (,4) - Tim McCoy, Linda Welzenbach | |
The sections are so similar that a single description suffices. The sections exhibit large chondrules (up to 3 mm) and CAIs in a dark matrix. Olivines range from Fa0-9 and low-Ca pyroxene is Fs1-2. The meteorites are unequilibrated carbonaceous chondrites, probably CV3. | |
Reclassification Notes (AMN 46,1) | |
Reclassification and pairing based on Raman spectroscopy (petrologic type 3.7), and on Ni content of metal and sulfide and magnetic susceptibility (Oxidized A). Details are reported in Righter et al. (2022); doi: 10.1111/maps.13932. |
Antarctic Meteorite Images for Sample MIL 07671 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample MIL 07671 | ||||
Thin Section Photo(s) : | ||||
Antarctic Meteorite Scans for Sample MIL 07671 | ||||
XCT Scan(s) : | ||||
XCT Scan of Sample MIL 07671 |
References for Sample MIL07671 | |
Eschrig, J., Bonal, L., Beck, P., Prestgard, T.J., 2021, Spectral reflectance analysis of type 3 carbonaceous chondrites and search for their asteroidal parent bodies. Icarus, 354, 114034, https://doi.org/10.1016/j.icarus.2020.114034. | |
Bonal, L., Gattacceca, J., Garenne, A., Eschrig, J., Rochette, P., and Ruggiu, L.K., 2020, Water and heat: New constraints on the evolution of the CV chondrite parent body. Geochimica et Cosmochimica Acta, 276, 363–383. | |
Gattacceca, J., Bonal, L., Sonzogni, C., and Longerey, J., 2020, CV Chondrites: More than one parent body. Earth and Planetary Science Letters, 547, 116467, doi: 10.1016/j.epsi2020.116467. | |
Bonal, L., Quirico, E., Flandinet, L., Montagnac, G., 2016, Thermal history of type 3 chondrites from the Antarctic meteorite collection determined by Raman spectroscopy of their polyaromatic carbonaceous matter. Geochimica et Cosmochimica Acta, 189, 312-337. |