采用 X 射线荧光光谱分析方法(XRF),对楚雄盆地不同地区的恐龙化石和围岩的元素成分进行对比研究。实验结果表明,恐龙化石中的主元素含量的排序均是 Ca、C、Si,而围岩中则均为 Si、C、Ca;在恐龙化石中有元素 F 和 As, 在围岩中不含 F 和...
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采用 X 射线荧光光谱分析方法(XRF),对楚雄盆地不同地区的恐龙化石和围岩的元素成分进行对比研究。实验结果表明,恐龙化石中的主元素含量的排序均是 Ca、C、Si,而围岩中则均为 Si、C、Ca;在恐龙化石中有元素 F 和 As, 在围岩中不含 F 和 As;在化石和围岩中 Pb 元素的含量均较低。其次,通过对禄丰恐龙山的两组化石和围岩元素含量的对比分析,推知恐龙山所处地层可能发生过断裂和错位的地壳变动。实验还发现,武定、牟定和元谋的化石中的微量元素含量具有共同的特点,即元素砷(As)含量略高,钡(Ba)的含量高异常和锌(Zn)含量低异常,有可能是导致这三个地方恐龙动物群的死亡原因之一。
The behavior of 3d-electrons in pure Ni,Co,Cr metals and Ni-Co-Cr alloys with different compounds has been studied by two-detector coincidence system of Doppler broadening of positron annihilation *** experimental res...
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The behavior of 3d-electrons in pure Ni,Co,Cr metals and Ni-Co-Cr alloys with different compounds has been studied by two-detector coincidence system of Doppler broadening of positron annihilation *** experimental results show that the 3d electron signal for pure Ni metal is relaticely *** replace of some Ni atoms to Co atoms in Ni-Co-Cr alloys leads to an increase in the probility of positron annihilation with 3d *** experimental ratio curves for three Ni-Co-Cr alloys are greatly similar to the corresponding theoretic ratio curves,which indicate that the bonding nature in Ni-Co-Cr alloys is mainly metallic.
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