The South African polymict eucrite Macibini
The South African polymict eucrite Macibini
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DOI：
10.1111/j.1945-5100.2000.tb01519.x
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发表时间：
2000-11
影响因子：
2.2
通讯作者：
P. Buchanan;D. Lindstrom;D. Mittlefehldt;C. Koeberl;W. U. Remold
中科院分区：
文献类型：
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作者：
P. Buchanan;D. Lindstrom;D. Mittlefehldt;C. Koeberl;W. U. Remold
摘要/ Abstract摘要：马西比尼多晶长辉长岩是一种破碎角砾岩，主要由长辉长岩物质组成，其中有少量（最大2 vol%）的重成岩物质。因此，它介于Yamato - 74159型多晶长辉长岩和霍华德长辉长岩之间，前者含有可忽略不计的镁质正辉石。本研究提供了该陨石角砾岩和6种碎屑的矿物学和整体成分数据。这些碎屑包括火山岩和火成岩以及各种撞击产生的岩石。在角砾岩最终聚集之前，这些物质受到不同程度的结晶后变质作用的影响。
Abstract— The polymict eucrite Macibini is a fragmental breccia, predominantly composed of eucritic materials with minor proportions (maximum 2 vol%) of diogenitic material. Hence, it is intermediate between the Yamato‐74159‐type polymict eucrites, which contain negligible amounts of magnesian orthopyroxene, and the howardites. The present study provides mineralogical and bulk compositional data for the meteorite breccia and for six clasts. These clasts include both volcanic and igneous rocks and a variety of impact‐generated rocks. A broad range of degrees of postcrystallization metamorphism affected these materials before the final aggregation of the breccia.