荷叶塘陨石岩矿特征及化学-岩石类型研究

doi:10.3724/SP.J.1084.2013.00386

极地研究 ›› 2013, Vol. 25 ›› Issue (4): 386-393.DOI: 10.3724/SP.J.1084.2013.00386

荷叶塘陨石岩矿特征及化学-岩石类型研究

沈文杰^{1, 2, 3} 胡森³ 林杨挺³缪秉魁⁴

¹中山大学，地球科学系，广东广州 510275；

²广东省地质过程与矿产资源探查重点实验室，广东广州 510275；

³中国科学院地球深部研究重点实验室，中国科学院地质与地球物理研究所，北京 100029；
⁴桂林理工大学，地球科学学院，广西桂林 541004

收稿日期:2013-04-03 修回日期:2013-07-10 出版日期:2013-12-30 发布日期:2013-12-30
通讯作者: 沈文杰
基金资助:
华南二叠纪-三叠纪界线高分辨率野火事件研究;浙江煤山二叠纪-三叠纪界线环境巨变的高分辨率地球化学记录

CHEMICAL AND PETROLOGIC STUDY OF THE HEYETANG METEORITE

Shen Wenjie^{1, 2, 3}, Hu Sen³, Lin Yangting³, Miao Bingkui⁴

¹Department of Earth Sciences, Sun Yat-sen University, Guangzhou 510275, China；

²Guangdong Key Laboratory of Geological Process and Mineral Resources Exploration, Guangzhou 510275, China；

³Key Laboratory of the Earth’s Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China；
⁴College of Earth Sciences, Guilin University of Technology, Guilin 541004, China

Received:2013-04-03 Revised:2013-07-10 Online:2013-12-30 Published:2013-12-30

摘要/Abstract

摘要： 荷叶塘陨石是1998年降落的一块普通球粒陨石。本文在对荷叶塘陨石的岩石学和矿物化学特征分析的基础上，划分了荷叶塘陨石的岩石类型和次级岩石类型。荷叶塘陨石橄榄石的Fa值在0.6-48.8之间，平均值为23.2，PMD为60.1%；低钙辉石的FS值在0.6-49.0之间，平均值为9.1，PMD为97.5%。结合橄榄石Fa值的PMD与次级岩石类型关系、橄榄石中的Cr含量、铁纹石中富Ni颗粒的数量密度等，综合判断荷叶塘陨石的化学-岩石类型为L3.3，由此表明该陨石是一块热变质程度非常低的L型非平衡普通球粒陨石。

关键词: 荷叶塘, 普通球粒陨石, 非平衡型陨石, L3.3型

Abstract: Heyetang meteorite is an ordinary chondrite falling in 1998.. Petrologic subtype of Heyetang meteorite was determined on the basis of detailed petrologic and mineralogical characteristics. The mean value of Fa in olivine is 23.2 with the range from 0.6 to 48.8(percent mean deviation (PMD) = 60.1%). The mean value of Fs in low-Ca pyroxene is 9.1 with the range from 0.6 to 49.0(PMD = 97.5%). Thus, it is an unequilibrated 3 type ordinary chondrite(OC). The chemical group was indicated by Fa value, total content of Fe-Ni metal and troilite, Co and Ni contents in kamacite and it actually has L group features. According to PMD of Fa content in olivine, Cr2O3 content in olivine and Ni-rich metals in chondrules, petrologic subtype of Heyetang meteorite belongs to L3.3 type OC. And it is one of the most primitive chondrite in the non-Antarctic meteorites in China.

Key words: Heyetang, Ordinary meteorite, Unequilibrated meteorite, Type L3.3

沈文杰胡森林杨挺缪秉魁. 荷叶塘陨石岩矿特征及化学-岩石类型研究[J]. 极地研究, 2013, 25(4): 386-393.

Shen Wenjie，Hu Sen，Lin Yangting，Miao Bingkui. CHEMICAL AND PETROLOGIC STUDY OF THE HEYETANG METEORITE[J]. ADVANCES IN POLAR SCIENCE, 2013, 25(4): 386-393.

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荷叶塘陨石岩矿特征及化学-岩石类型研究

CHEMICAL AND PETROLOGIC STUDY OF THE HEYETANG METEORITE

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