Weathering, shock metamorphism and type distribution patterns of 98 ordinary chondrites from the Grove Mountains, Antarctica

Petrography and mineral chemistry of ninety-eight ordinary chondrites from Grove Mountains (GRV), Antarctica, were presented and their. Weathering effect, shock metamorphism and type distribution patterns were discussed in this study. Among them, six are unequilibrated ordinary chondrites, including...

Full description

Bibliographic Details
Main Authors: Deqiu, Dai, Daode, Wang, Bingkui, Miao
Format: Article in Journal/Newspaper
Language:English
Published: Polar Research Institute of China - PRIC 2009
Subjects:
Space
Antarctic
Transantarctic Mountains
Grove Mountains
Advances in Polar Science
Antarc*
Antarctica
Polar Science
Online Access:http://library.arcticportal.org/2386/
http://library.arcticportal.org/2386/1/A0090210.pdf
Description
Summary:Petrography and mineral chemistry of ninety-eight ordinary chondrites from Grove Mountains (GRV), Antarctica, were presented and their. Weathering effect, shock metamorphism and type distribution patterns were discussed in this study. Among them, six are unequilibrated ordinary chondrites, including 3H3 and 3 L3; and 92 meteorites are equilibrated ordinary chondrites, including 24H-group (13H4, 10 H5, 1H6), 64 L-group (2 L4, 44 L5, 18 L6) and 4 LL-group (3 LL4, 1 LL5). Most GRV chondrites ( > 90% ) displayed minor weathering effect (W1 and W2). About half of the meteorites experienced severe shock metamorphism. They commonly contain shock-induced melt veins and pockets. These heavily shocked meteorites provide us with natural samples for study of high-pressure polymorphs of minerals. In addition, the Grove Mountains collection seems to have more abundant unequilibrated and L group ordinary chondrites compared to the US Antarctic meteorite collection which were mainly found a long the Transantarctic Mountains.

Similar Items