极地研究

极地研究 ›› 2023, Vol. 35 ›› Issue (2): 288-303.DOI: 10.13679/j.jdyj.20220203

• 研究论文 • 上一篇    下一篇

顽火辉石球粒陨石分类方法综述及其应用

林佳睿 陈宏毅 谢兰芳 张晋瑜 高旭凯 黄飞雪   

  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
  • 出版日期:2023-06-30 发布日期:2023-06-20
  • 通讯作者: 陈宏毅
  • 作者简介:林佳睿, 女, 2000年生。本科生, 主要从事陨石学与天体化学研究。E-mail: LIN-Jiarui@outlook.com
  • 基金资助:
    国家自然科学基金(41866008)、桂林理工大学科研启动金(RD19200001)和广西中青年教师能力提升项目(2022KY0240)资助

Review of classification methods of enstatite chondrite and its application

Lin Jiarui, Chen Hongyi, Xie Lanfang, Zhang Jinyu, Gao Xukai, Huang Feixue   

  1. Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Key Laboratory of Planetary Geological Evolution of Guangxi Provincial Universities, Institution of Meteorites and Planetary Materials Research, Guilin University of Technology, Guilin 541006, China
  • Online:2023-06-30 Published:2023-06-20

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摘要： 顽火辉石球粒陨石是已发现的陨石中还原程度最高的一类, 源区接近太阳原行星盘的内部区域, 对研究早期太阳星云演化和地球起源有较大意义。本文综述了不同类型顽火辉石球粒陨石的岩石学和矿物学特征, 梳理了不同亚型顽火辉石球粒陨石的划分标准, 并讨论其母体来源。按照此标准重新厘定和细分了1952年降落的Abee(EH4)和2013年回收于南极的GRV 13100(EH4)。Abee被重新厘定为EHb-5β型(碎屑和基质)或EHb-6β型(暗色包裹体), GRV 13100被细分为EHa-4α型。综合使用a、b亚群和结构-矿物学分类方法, 可以直观体现顽火辉石球粒陨石的母体来源及变质过程中的峰值温度和变质后生作用的平衡程度。

关键词: 顽火辉石球粒陨石, 岩石学, 矿物化学, 亚型划分, 母体

Abstract: Enstatite chondrites are one of the most reduced types of meteorites found, originating from close to the inner region of the solar protoplanetary disk, and are of great importance to the study of the evolution of the early solar nebulas and the origin of the Earth. This paper reviews the petrological and mineralogical characteristics of different types of enstatite chondrites, sorts the classification criteria of different subtypes, and discusses the origin of their parent bodies. Abee (EH4), which fell in 1952, and GRV 13100 (EH4), which was recovered from Grove Mountain, Antarctica, in 2013, were redefined and subdivided in terms of these classification criteria. Abee was redefined as EHb-5β type (debris and matrix) or EHb-6β type (dark inclusion), while GRV 13100 was subdivided into EHa-4α type. The origin of the parent bodies of these enstatite chondrites, and the peak temperature during metamorphism and the degrees of equilibrium after metamorphism, are directly reflected by the comprehensive use of subgroups a and b and the textural–mineralogical classification method.

Key words: enstatite chondrite, petrology, mineralogy, subtype classification, parent body