论文部分内容阅读
On the basis of extensive sampling and a large number of analyses, the major chemical compositions of the Malan Loess have been measured and calculated using the method of mass-weighted average. Obvious differences are noticed in the major chemical compositions between the Malan Loess and other loesses distributed in various areas of the world, suggesting that there are some differences in provenance composition, geological and geographical condition and paleoclimate during the loess accumulation in various areas of the world. The Malan Loess is relatively rich in lithophile elements such as Si and K, but poor in siderophile elements such as Fe, Mg, Ti and Mn, compared with the lower and bulk crust. Much similarity is noticed in major average chemical compositions between the Malan Loess and the upper continental crust. In the Malan Loess Ca is relatively rich and Na is relatively poor; other major elements such as Si, Al, Fe, Mg, Ti and Mn, etc. are close, even identical to one another, indicating that
On the basis of extensive sampling and a large number of analyzes, the major chemical compositions of the Malan Loess have been measured and calculated using the method of mass-weighted average. Obvious differences are noticed in the major chemical compositions between the Malan Loess and other loesses distributed in various areas of the world, suggesting that there are some differences in provenance composition, geological and geographical condition and paleoclimate during the loess accumulation in various areas of the world. The Malan Loess is relatively rich in lithophile elements such as Si and K , but poor in siderophile elements such as Fe, Mg, Ti and Mn, compared with the lower and bulk crust. Much similarity is noticed in major average chemical compositions between the Malan Loess and the upper continental crust. rich and Na is relatively poor; other major elements such as Si, Al, Fe, Mg, Ti and Mn, etc. are close, even identical to one anothe r, indicating that