南极格罗夫山陨石的研究与展望

OVERVIEW OF METEORITE COLLECTIONS FROM GROVE MOUNTAINS, ANTARCTICA

本文综述了我国第 1 5次 ( 1 998/ 1 999)、1 6次 ( 1 999/ 2 0 0 0 )南极科学考察队在东南极格罗夫山冰区回收的 32块陨石的岩石矿物学特征及其分类。这些陨石包括 :2 3块平衡型普通球粒陨石、6块非平衡型普通球粒陨石、1块二辉橄榄岩质火星陨石、1块钙长辉长无球粒陨石、1块未分群的铁陨石。文中还对南极格罗山冰区的陨石富集机制、GRV 980 0 4 (H5 )球粒陨石异常低的宇宙射线暴露年龄、火星陨石的溅射年龄等进行了初步的讨论 ,并对今后格罗夫山陨石的研究提出一些初步想法。

Petrography, mineral chemistry and classification of 32 meteorites collected by the 15 th and 16 th Chinese Antarctic Research Expeditions (CHINARE) were summarized. These meteorites include 23 equilibrated ordinary chondrites, 6 unequilibrated ordinary chondrites, 1 Martian lherzolite, 1 eucrite, and 1 ungrouped iron meteorite. Possible meteorite concentrating mechanisms in Grove Mountains area, unusually low cosmic ray explosion age of GRV 98004 (H5), and ejection ages of Martian meteorites are discussed. In addition, several aspects in the future study of Grove Mountains meteorites are proposed.