极地研究

极地研究 ›› 2013, Vol. 25 ›› Issue (4): 378-385.DOI: 10.3724/SP.J.1084.2013.00378

• 研究论文 • 上一篇    下一篇

南极格罗夫山碳质球粒陨石的研究与展望

戴德求1,2,陈新跃1,杨荣丰1,3   

  1.  
    1湖南科技大学地质研究所，湖南 湘潭 411201； 2中国科学院地球化学研究所，贵州 贵阳 550002；
    3页岩气开发与利用湖南省重点实验室，湖南 湘潭 411201
  • 收稿日期:2013-04-03 修回日期:2013-04-12 出版日期:2013-12-30 发布日期:2013-12-30
  • 通讯作者: 戴德求
  • 基金资助:

    国家自然科学基金“行星冲击产生的高温高压相变反应：月球火星陨石中后成合晶的研究”;环境地球化学国家重点实验室开放基金;中国博士后基金

THE STUDY OF AND EXPECTATIONS FOR FINDING CARBONACEOUS CHONDRITES IN THE GROVE MOUNTAINS, ANTARCTICA

DAI Deqiu1,2，CHEN Xinyue1，Yang Rongfeng1,3   

  1.  
    1Institute of Geology, Hunan University of Science and Technology, Xiangtan 411201, China;
    2Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;
    3Hunan Provincial Key Laboratory of Shale Gas Resource Utilization, Xiangtan 411201, China
  • Received:2013-04-03 Revised:2013-04-12 Online:2013-12-30 Published:2013-12-30

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1252

被引次数

5

摘要： 本文报导了3块南极格罗夫山碳质球粒陨石(GRV 020025, 021579和022459)的矿物岩石学特征。3块碳质球粒陨石具有明显的非平衡陨石的特征，基质和球粒的模式比值分别为2.8 (GRV 020025)、1.2 (GRV 021579)和1 (GRV 022459)。GRV 022459具有明显较其他两块陨石大的球粒直径(0.6-2.0 mm)。在3块碳质球粒陨石中，一共发现了27个富Ca, Al包体，除了在GRV 020025和021579中各发现了一个富尖晶石球粒状包体，其余25个包体均属于A型(似A型)和富尖晶石-辉石型包体。大部分包体发生了强烈的蚀变，GRV 020025中的包体出现了大量层状硅酸盐，GRV 022459中的尖晶石具有富FeO的特征。最后，对南极碳质球粒陨石的下一步研究工作进行了展望。

关键词: 矿物岩石学特征, 富Ca, Al包体, 碳质球粒陨石, 南极

Abstract: Petrography and mineral chemistry of 3 carbonaceous chondrites (GRV 020025, 021579 and 022459) collected from the Grove Mountains (GRV), Antarctica, were reported here. All 3 chondrites are unequilibrated.The modal abundance ratio of matrix/chondrule are 2.8 (GRV 020025), 1.2 (GRV 021579) and 1 (GRV 022459). GRV 022459 has the largest chondrules (0.6-2.0 mm). A total 27 Ca-, Al-rich inclusions have been found in the three chondrites. Except for one spinel-spherule in each GRV 020025 and 021579, all other inclusions can be classified as Type A (or Type A-like) or spinel-pyroxene-rich inclusions. Most of the inclusions are intensively altered, with abundant phyllosilicates in the inclusions from GRV 020025 and FeO-enrichment of spinel in GRV 022459. At last, we look forward to the step studying work of Antarctica carbonaceous chondrites.

Key words: petrography and mineral chemistry, Ca-, Al-rich inclusions, carbonaceous chondrites, Antarctica