Eutectic metal plus troilite plus Fe-Mn-Na phosphate plus Al-free chromite assemblage in shock-produced chondritic melt of the Yanzhuang chondrite | |
Xie, Xiande ; Chen, Ming ; Zhai, Shuangmeng ; Wang, Fuya | |
刊名 | meteoritics planetary science
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2014 | |
关键词 | SIXIANGKOU METEORITE NATURAL OCCURRENCE SUIZHOU METEORITE IRON-METEORITES H6 CHONDRITE VEINS HISTORY METAMORPHISM MINERALOGY POLYMORPH |
DOI | 10.1111/maps.12379 |
英文摘要 | An assemblage with FeNi metal, troilite, Fe-Mn-Na phosphate, and Al-free chromite was identified in the metal-troilite eutectic nodules in the shock-produced chondritic melt of the Yanzhuang H6 meteorite. Electron microprobe and Raman spectroscopic analyses show that a few phosphate globules have the composition of Na-bearing graftonite (Fe,Mn,Na)(3)(PO4)(2), whereas most others correspond to Mn-bearing galileiite Na(Fe,Mn)(4)(PO4)(3) and a possible new phosphate phase of Na-2(Fe,Mn)(17)(PO4)(12) composition. The Yanzhuang meteorite was shocked to a peak pressure of 50 GPa and a peak temperature of approximately 2000 degrees C. All minerals were melted after pressure release to form a chondritic melt due to very high postshock heat that brought the chondrite material above its liquidus. The volatile elements P and Na released from whitlockite and plagioclase along with elements Cr and Mn released from chromite are concentrated into the shock-produced Fe-Ni-S-O melt at high temperatures. During cooling, microcrystalline olivine and pyroxene first crystallized from the chondritic melt, metal-troilite eutectic intergrowths, and silicate melt glass finally solidified at about 950-1000 degrees C. On the other hand, P, Mn, and Na in the Fe-Ni-S-O melt combined with Fe and crystallized as Fe-Mn-Na phosphates within troilite, while Cr combined with Fe and crystallized as Al-free chromite also within troilite.; Geochemistry & Geophysics; SCI(E); 0; ARTICLE; xdxie@gzb.ac.cn; 12; 2290-2304; 49 |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.pku.edu.cn/handle/20.500.11897/207420] ![]() |
专题 | 地球与空间科学学院 |
推荐引用方式 GB/T 7714 | Xie, Xiande,Chen, Ming,Zhai, Shuangmeng,et al. Eutectic metal plus troilite plus Fe-Mn-Na phosphate plus Al-free chromite assemblage in shock-produced chondritic melt of the Yanzhuang chondrite[J]. meteoritics planetary science,2014. |
APA | Xie, Xiande,Chen, Ming,Zhai, Shuangmeng,&Wang, Fuya.(2014).Eutectic metal plus troilite plus Fe-Mn-Na phosphate plus Al-free chromite assemblage in shock-produced chondritic melt of the Yanzhuang chondrite.meteoritics planetary science. |
MLA | Xie, Xiande,et al."Eutectic metal plus troilite plus Fe-Mn-Na phosphate plus Al-free chromite assemblage in shock-produced chondritic melt of the Yanzhuang chondrite".meteoritics planetary science (2014). |
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