极地研究

极地研究 ›› 2020, Vol. 32 ›› Issue (4): 417-434.DOI: 10. 13679/j.jdyj.20200006

• 研究综述 •    下一篇

南极格罗夫山陨石收集、研究进展和富集机制

陈宏毅1  缪秉魁1  夏志鹏1  谢兰芳1  赵斯哲1,2   

  1. 1.桂林理工大学, 广西隐伏金属矿产勘查重点实验室, 行星地质演化广西高校重点实验室,陨石与行星物质研究中心, 广西 桂林 541006;
    2.中国科学院地球化学研究所, 月球与行星科学研究中心, 贵州 贵阳 550081
  • 收稿日期:2020-02-19 修回日期:2020-03-24 出版日期:2020-12-30 发布日期:2020-12-24
  • 通讯作者: 陈宏毅
  • 基金资助:
    国家自然科学基金(41866008, 41776196)、桂林理工大学科研启动金(RD19200001)、广西科技计划项目(桂科AD16450001, 桂科AD1850007)资助

Recoveries, research progress, and concentration mechanism of meteorites in the Grove Mountains, Antarctica

Chen Hongyi1, Miao Bingkui1,Xia Zhipeng1, Xie Lanfang1, Zhao Sizhe1,2   

  1. 1.Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Guangxi Key Laboratory of Planetary Geological Evolution, Research Center of Meteorites and Planetary Materials, Guilin University of Technology, Guilin 541006, China;
    2.Center for Lunar and Planetary Sciences, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
  • Received:2020-02-19 Revised:2020-03-24 Online:2020-12-30 Published:2020-12-24
  • Contact: Chen Hongyi

PDF (PC)

831

摘要： 经过7次南极格罗夫山考察, 我国成功收集陨石12 665块, 证明格罗夫山为南极陨石富集区, 但和南极其他富集区相比, 格罗夫山陨石数量多、平均重量小、特殊类型陨石所占比例小。第3次和第4次格罗夫山考察共收集陨石9 802块, 106.5 kg, 分别占总数量和总重量的77.4%和82.5%, 之后收集陨石的数量和重量持续下降。相对于国际上研究程度高的陨石富集区, 格罗夫山冰流速率快、流向复杂、冰裂隙发育、夏季盛行偏东风且风力大, 可能是格罗夫山陨石碎块相对富集的客观原因; 但格罗夫山的蓝冰消融率、冰川流速、全年的气象条件等方面积累数据不足。因此, 尽快采集格罗夫山地区的冰川变化和气象数据, 建立格罗夫山陨石富集机制模型, 对合理规划格罗夫山陨石科考和探索新的陨石富集区具有重要意义。

关键词: 南极 , 格罗夫山 , 陨石收集 , 研究进展 , 富集机制

Abstract:

China has successfully recovered 12 665 meteorites in the previous seven expeditions to the Grove Mountain region of Antarctica, unarguably demonstrating that the Grove Mountains are a meteorite concentration area. However, meteorites recovered from the Grove Mountains display larger numbers, lower average weights and smaller proportions of specific types of meteorites compared with other meteorite concentration areas in Antarctica. A total of 9 802 meteorites (106.5 kg) were collected in the third and fourth Grove Mountains expeditions, accounting for 77.4% and 82.5% of the total amount and weight, respectively. Then, the number and weight of meteorites recovered in the Grove Mountain region continually decreased from 1 618(17.1 kg) to ~600 (~2.0 kg)in the following three missions. Compared with mature meteorite concentration areas in Antarctica, the ice flow rate of the Grove Mountains is fast, the flow direction is complex, the crevasses of glacier are well developed, and the prevailing easterly wind in summer is strong, which may be the reasons for the relative enrichment of meteorite fragments in the Grove Mountains. However, the data of ablation rates of blue ice, glacier velocity, and annual meteorological conditions are insufficient. Therefore, it is of great significance to collect glacier change and meteorological data as soon as possible and to establish a model of the meteorite concentration mechanism in the Grove Mountains for reasonable planning of meteorite scientific expeditions to the Grove Mountains and the exploration of new meteorite concentration areas.

Key words:

"> Antarctica, Grove Mountains, meteorite recovery, research progress, concentration mechanism

">