南极格罗夫山陨石收集、研究进展和富集机制
RECOVERIES,RESEARCH PROGRESS,AND CONCENTRATION MECHANISM OF METEORITES IN THE GROVE MOUNTAINS,ANTARCTICA
查看参考文献114篇
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文摘
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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。 |
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其他语种文摘
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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. |
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来源
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极地研究
,2020,32(4):417-434 【扩展库】
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DOI
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10.13679/j.jdyj.20200006
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关键词
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南极
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格罗夫山
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陨石收集
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研究进展
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富集机制
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地址
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桂林理工大学, 陨石与行星物质研究中心, 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, 广西, 桂林, 541006
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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
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语种
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中文 |
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文献类型
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综述型 |
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ISSN
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1007-7073 |
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学科
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天文学;自然地理学 |
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基金
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桂林理工大学科研启动金
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广西项目
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国家自然科学基金
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文献收藏号
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CSCD:6873579
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