Eutectic metal plus troilite plus Fe-Mn-Na phosphate plus Al-free   chromite assemblage in shock-produced chondritic melt of the Yanzhuang   chondrite

doi:10.1111/maps.12379

CORC > 北京大学 > 地球与空间科学学院

	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
	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).