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1982•Chinese Journal of Space ScienceOpen access

STUDY ON THE CHEMICAL COMPOSITION OF 9 CHONDRITES IN CHINA

Wen‐Hua Chen, Eui-zhi Du, Xiu-ying Fang, Jin-lian Peng, Changsheng Xie

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Abstract

In this paper,not only has an analytical procedure to determine various chemical elements in chondrites been developed,but also their contents in 9 chondrites have been determined.In addition,chemical parameters were calculated.According to their chemical composition and parameters,we can come to the following conclusions:1.The 9 chondrites belong to 3 chemical groups,H (Lunan,Tuochi,Xinyang),L (Jartai,Xiwu,Rugao,Lishui,Guangrao) and LLgroup (Dongtai).2.Fe0 and the ratio of FeO/Fe decrease from Hto LL,but FeOand FeSincrease,It means that the degree of oxidation is growing higher.3.The contents of SiO2 also increase from H to LL whereas TFe,Ni and Co decrease.The variation rule can be used as the reference criteria to distingush the chemical groups of chondrites.4.The contents of SiO2,MgO,FeO,Fe0 FeS and TFe in chondrites from Eugao determined earlier have been corrected.

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In this paper,not only has an analytical procedure to determine various chemical elements in chondrites been developed,but also their contents in 9 chondrites have been determined.In addition,chemical parameters were calculated.According to their chemical composition and parameters,we can come to the following conclusions:1.The 9 chondrites belong to 3 chemical groups,H (Lunan,Tuochi,Xinyang),L (Jartai,Xiwu,Rugao,Lishui,Guangrao) and LLgroup (Dongtai).2.Fe0 and the ratio of FeO/Fe decrease from Hto LL,but FeOand FeSincrease,It means that the degree of oxidation is growing higher.3.The contents of SiO2 also increase from H to LL whereas TFe,Ni and Co decrease.The variation rule can be used as the reference criteria to distingush the chemical groups of chondrites.4.The contents of SiO2,MgO,FeO,Fe0 FeS and TFe in chondrites from Eugao determined earlier have been corrected.

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Available abstract

In this paper,not only has an analytical procedure to determine various chemical elements in chondrites been developed,but also their contents in 9 chondrites have been determined.In addition,chemical parameters were calculated.According to their chemical composition and parameters,we can come to the following conclusions:1.The 9 chondrites belong to 3 chemical groups,H (Lunan,Tuochi,Xinyang),L (Jartai,Xiwu,Rugao,Lishui,Guangrao) and LLgroup (Dongtai).2.Fe0 and the ratio of FeO/Fe decrease from Hto LL,but FeOand FeSincrease,It means that the degree of oxidation is growing higher.3.The contents of SiO2 also increase from H to LL whereas TFe,Ni and Co decrease.The variation rule can be used as the reference criteria to distingush the chemical groups of chondrites.4.The contents of SiO2,MgO,FeO,Fe0 FeS and TFe in chondrites from Eugao determined earlier have been corrected.

Key concepts: Chondrite, Astrobiology, Chemical composition, Formation and evolution of the Solar System, Meteorite, Geology, Earth science, Physics

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