The discovery of FeCrNi spherules from the main hole of CCSD
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P575

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    Abstract:

    Two FeCrNi spherules were discovered in the main hole of CCSD. They are about 200 μm in size. Their chemical compositions are Fe 71.07%~73.68%, Cr14.55%~16.79% and Ni 9.91%~11.47%,totally 98.2%~99.65%.The spherules contain oxide inclusions, with elements of Cr, Mn, Ti, Al, Fe, Si, and O. X-ray diffraction analysis shows that the spherules, having molecular formulaof Fe0.74Cr0.16Ni0.10,is polycrystalline and of the cubic system, with space group of Fm3m, cell parameter of a =0.360?3 nm, Z=4 and density of 7.828 g/cm3. The polished faces of the spherules are white gray in color and have metallic luster. The hardness of the spherules is about 4.026Hm. The reflectance of spherule is 56%~63%, with S546 of 56%. The spherules were probably produced by cooling of melted FeCrNi metallic droplets which trapped oxygen and was thus oxidized.

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任玉峰 方青松 白文吉 杨经绥 戎合 颜秉刚 张仲明 许志琴,2005,中国大陆科学深钻主孔中FeCrNi合金球粒的发现[J].岩石矿物学杂志,24(5):485~488. Ren YuFeng;Fang QingSong;Bai WenJi;Yang JingSui;Rong Ge;Yan BingGang;Zhang ZhongMing;Xu ZhiQin,2005,The discovery of FeCrNi spherules from the main hole of CCSD[J]. Acta Petrologica et Mineralogica,24(5):485~488.

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  • Received:July 11,2005
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