摘要
本文论述了江苏省新沂、泗洪地区下更新统王圩组中、下部砂砾层中的微玻璃球的物性特征、化学成分、表面和断面结构、构造,并同我国及世界各地的微玻璃陨石进行对比,从而认为:新、泗地区微玻璃球粒既非海底火山物质,也非工业污染,其成因是地外陨落物,属于“陨石消融型微玻璃质球粒”。
The glassy microspherule is very similar to the microtekite in shape,section,structure and texture characters but different from common or dark green microtekite in composition and refractive index.It confirms that the glassy micro- spherule does not belong to the family of microtekite which was found early in 1844.On the other hand.it is different from lunar glass and lunar regolith,and also different from submarine volcanic glass owing to its low contents of sodium amd potassium and high contents of iron and titanium.In spite of little higher content of CaO,the average chemical com- position is similar to the fassaite which is one of the composition minerals of Allende meteorite.The molecule formula of the glassy microspherule is Ca 1.17(Mg 0.199 Fe 0.378Al 0.203)_(0.78)(Sil.666Ti 0.175Al0.259)_2O_6).The molecule formula of fassaite is Ca(Mg.Fe^3.Al)[(Si,Al)_2O_6].The inner nucleus of glassy microspherule has very obvious devitri- fication indicating that it is not formed by industrial pollution.The most passible genesis is a kind of meteorite material, may be meteorite-melting glassy microspherule.
出处
《江苏地质》
1991年第2期65-71,共7页
Jiangsu Geology
基金
国家自然科学基金委员会资助
