Mass distribution of Antarctic ordinary chondrites and the estimation of the fall-to-specimen ratios
Mass distribution of Antarctic ordinary chondrites and the estimation of the fall-to-specimen ratios
复制标题
南极普通球粒陨石的质量分布和坠落样本比的估计
DOI：
10.1111/j.1945-5100.1992.tb00225.x
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
M. Kimura
中科院分区：
文献类型：
--
作者：
Y. Ikeda;M. Kimura
-日本和美国南极普通球粒陨石每种类型的累积质量分布(质量范围&Gt；100g)与非南极瀑布的累积质量分布和由陨石现今通量获得的质量分布进行了比较。南极球粒陨石质量分布的陡坡表明存在几次球粒陨石阵雨。大于100g的南极普通球粒陨石的落样比约为1：2，表明其中一半是簇射成分。日本和美国南极陨石样品的陨石比分别为H球粒陨石1：1~1：2和1：4，L球粒陨石1：1~1：2和1：2，LL球粒陨石1：2和1：6，表明日本陨石样品中簇射组分的丰度低于美国陨石样品。H4-6型和L4-6型的落样比在1：1~1：4之间，美国H6和日本H4的落样比较低，为1：4。
— The cumulative mass distributions (mass range > 100 g) of each type of Japanese and U.S. Antarctic ordinary chondrites are compared with those of non-Antarctic falls and those obtained from the present-day flux of meteorites. The steeper slope of the mass distribution of Antarctic chondrites is indicative of the presence of several chondrite showers. The fall-to-specimen ratio of Antarctic ordinary chondrites larger than 100 g is about 1:2, indicating that half of them are shower components. The fall-to-specimen ratios of each group range from 1:1 to 1:6; those of the Japanese and U.S. Antarctic meteorite collections are 1:1 to 1:2 and 1:4 for H chondrites, 1:1 to 1:2 and 1:2 for L chondrites, and 1:2 and 1:6 for LL chondrites, indicating that the Japanese collection includes less abundant shower components than the U.S. collection. The fall-to-specimen ratios of each H4-6 and L4-6 type range from 1:1 to 1:4, and U.S. H6 and Japanese H4 have the low ratios of 1:4.