| 荷叶塘陨石岩矿特征及化学-岩石类型研究 |
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| 引用本文： | 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. |
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| 作者姓名： | 沈文杰 胡森 林杨挺 缪秉魁 |
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| 作者单位： | 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 |
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| 基金项目： | 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 |
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| 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。
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| 收稿时间： | 2013-04-03 |
CHEMICAL AND PETROLOGIC STUDY OF THE HEYETANG METEORITE |
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| Shen Wenjie,Hu Sen,Lin Yangting,Miao Bingkui.CHEMICAL AND PETROLOGIC STUDY OF THE HEYETANG METEORITE[J].Chinese Journal of Polar Research,2013,25(4):386-393. |
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| Authors: | Shen Wenjie Hu Sen Lin Yangting Miao Bingkui |
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| 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. |
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| Keywords: | Heyetang Ordinary meteorite Unequilibrated meteorite Type L3 3 |
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