我国南极陨石研究与展望

An Overview on Antarctic Meteorite Colletion and Studies in China

继1998～2000年我国第15、16次南极科考队在南极格罗夫山发现32块陨石之后,2002～2003年第19次科考队成立了以回收陨石为中心任务的格罗夫山综合考察分队,在同一地区成功回收4448块陨石。我国的南极陨石回收工作不但实现了零的突破,而且成为继日本和美国之后拥有南极陨石数量最多的国家之一。通过对第15、16次队回收的32块陨石以及第19次队4448块陨石中的38块代表性样品的化学 岩石类型划分工作,除平衡型普通球粒陨石外,发现了2块火星陨石、2块橄辉无球粒陨石、6块非平衡L3型陨石、4块碳质球粒陨石和1块非平衡型顽辉石球粒陨石等特殊类型陨石。本文主要介绍了南极陨石的回收和研究进展,以及我国在南极格罗夫山回收陨石的情况和已取得的初步研究成果。同时对我国今后的陨石回收与研究工作提出初步设想。

Following the discovery of 32 meteorites in Grove Mountains, Antarctica, by the 15^(th) and 16^(th) Chinese Antarctic Research Expeditions (CHINARE) during 1998-2000, the 19^(th) CHINARE has successfully collected 4448 meteorites in the same region during 2002-2003. This updates the Antarctic meteorite collection of China to the 3^(rd) in the world in regard to number after Japan and USA. The first 32 meteorites and 38 out of 51 representatives selected from the new 4448 meteorites have been classified. Except for equilibrated ordinary chondrites, there are 2 martian meteorites, 2 ureilites, 6 unequilibrated L3 chondrites, 4 carbonaceous chondrites, and 1 unequilibrated enstatite chondrite. In this paper, we summarize recent progresses in searching for and studying Antarctic meteorites, including those found in Grove Mountains by CHINARE, in order to direct both future meteorite searching in Grove Mountains and Antarctic meteorite study in China.