scholarly journals Chemical-Petrographic Types and Shock Metamorphism of 184 Grove Mountains Equilibrated Ordinary Chondrites

Minerals ◽  
2018 ◽  
Vol 8 (6) ◽  
pp. 240
Author(s):  
Deqiu Dai ◽  
Shuang Liu ◽  
Xuemei Liu
Keyword(s):  
Shock Metamorphism ◽  
Ordinary Chondrites ◽  
Grove Mountains

The Mineral Chemistry and Classification of New Ordinary Chondrites Collected in Antarctica

2012 ◽  
Vol 621 ◽  
pp. 125-129
Author(s):  
Bao Hua Wang ◽  
Shi Jie Li ◽  
Bing Kui Miao
Keyword(s):  
High Pressure ◽  
Mineral Chemistry ◽  
Shock Metamorphism ◽  
Ordinary Chondrites ◽  
Similar Composition ◽  
Severe Shock ◽  
Grove Mountains

Petrography and mineral chemistry of ninety-eight ordinary chondrites from Grove Mountains, Antarctica, have been studied, in order to assign their chemical-petrographic types. The chemical-petrographic types of these meteorites are presented below: 36 H-groups (21 H4, 9 H5, 6 H6) and 62 L-groups (25 L5, 37 L6). The compositions of olivines and low-Ca pyroxenes in the all these ordinary chondrites have similar composition, respectively, reflecting some degree thermodynamics equilibration in them. The weathering degrees of all the ordinary chondrites, consisting of predominant weathering degrees of W1, suggest lightly weathered among them. More than 30% meteorites experienced severe shock metamorphism, as indicated by the presences of shock-induced melt veins and pockets. These heavily shocked meteorites provide us with natural samples for study of high-pressure polymorphs of minerals.

Classification of 24 New Ordinary Chondrites from the Grove Mountains, Antarctica

2004 ◽  
Vol 78 (5) ◽  
pp. 1052-1059 ◽  
Author(s):  
LU Ren ◽  
MIAO Bingkui ◽  
WANG Guiqing ◽  
DAI Deqiu ◽  
LIN Yangting ◽  
...  
Keyword(s):  
Ordinary Chondrites ◽  
Grove Mountains

The noble gases in five ordinary chondrites from Grove Mountains in Antarctica

2020 ◽  
Vol 192 ◽  
pp. 105045
Author(s):  
Ying Wang ◽  
Huaiyu He ◽  
Ingo Leya ◽  
P.M. Ranjith ◽  
Fei Su ◽  
...  
Keyword(s):  
Noble Gases ◽  
Ordinary Chondrites ◽  
Grove Mountains

scholarly journals Shock metamorphism of ordinary chondrites

1991 ◽  
Vol 55 (12) ◽  
pp. 3845-3867 ◽  
Author(s):  
Dieter Stöffler ◽  
Klaus Keil ◽  
Scott Edward R.D
Keyword(s):  
Shock Metamorphism ◽  
Ordinary Chondrites

Raman spectroscopic study of four Spanish shocked ordinary chondrites: Cañellas, Olmedilla de Alarcón, Reliegos and Olivenza

2010 ◽  
Vol 368 (1922) ◽  
pp. 3153-3166 ◽  
Author(s):  
F. Rull ◽  
M. J. Muñoz-Espadas ◽  
R. Lunar ◽  
J. Martínez-Frías
Keyword(s):  
Raman Spectroscopy ◽  
Chemical Composition ◽  
Spectral Band ◽  
Shock Metamorphism ◽  
Structural Deformation ◽  
Ordinary Chondrites ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Vibrational Characteristics ◽  
The Impact

Shock metamorphism in chondritic parent bodies produces typical textures, visible under the microscope, which are a consequence of structural deformation of the crystals. Such deformations can be studied with Raman spectroscopy. The vibrational characteristics of olivines and pyroxenes, structurally deformed by weak-to-moderate shock metamorphism, have been determined on four Spanish ordinary chondrites (Cañellas, Olmedilla de Alarcón, Reliegos and Olivenza). Such deformations would affect, in principle, the band positions and widths of the Raman spectra peaks. The measured band positions and relative intensities are consistent with chemical composition for olivines and pyroxenes, but show little influence on the degree of shock. However, the full spectral band width of the silicate internal modes shows some dependence on the impact grade, which could be attributed to inhomogeneous effects produced by the impacts.

scholarly journals Mineralogy and petrology of two ordinary chondrites and their correlation with other meteorites

Mineralogia ◽  
2009 ◽  
Vol 40 (1-4) ◽  
pp. 107-116
Author(s):  
Krzysztof Owocki ◽  
Andrzej Pilski
Keyword(s):  
Light Microscopy ◽  
Electron Microprobe ◽  
Weak Shock ◽  
Parent Body ◽  
Shock Metamorphism ◽  
The Other ◽  
Ordinary Chondrites ◽  
Reflected Light ◽  
Place Of Origin

Mineralogy and petrology of two ordinary chondrites and their correlation with other meteoritesTwo ordinary chondrites are compared and classified using transmitted and reflected light microscopy and electron microprobe analyses. Both meteorites were confiscated by the Polish Customs Service at the border with Belarus. The first meteorite (called in this paper Terespol-1) is a L/LL6 chondrite, its classification being supported by the equilibrated compositions of olivine and orthopyroxene and the presence of large recrystallized feldspars (< 150 μm). The specimen examined experienced weak shock metamorphism (S3) and moderate weathering (although metal in the inner part of the meteorite seems to be unaffected by oxidization). The other meteorite (called in this paper Terespol-2) is a LL6 chondrite which experienced weak shock metamorphism (S3) and is unaffected by weathering. The Terespol-2 meteorite shares its classification with the Dhofar 1401 chondrite but the lack of data prevents further correlation. Both meteorites have been correlated with known findings from the Meteoritical Bulletin database and an attempt is made to identify their place of origin (fall event). Results indicate that Terespol-1 is most closely related to the Dhofar 1316 chondrite and we suggest that both meteorites at least came from the same parent body.

Sign in / Sign up

Export Citation Format

Share Document