和田河与克里雅河流域不同类型沙物质的地球化学探讨

本文通过对和田河和克里雅河流域不同类型沙物质的矿物和化学成分研究,揭示了河流沙、沙丘沙和地层沙的矿物成分和化学成分存在的差异,指出这种差异是有关元素及化合物(或矿物)在不同环境下具有不同地球化学行为的结果。

GEOCHEMICAL STUDIES OF VARIOUS SAND SEDIMENTS IN THE HOTAN RIVER AND THE KELIYA RIVER BASINS

The differences of mineral and chemical composition of various sand samples are first pointed out. There is good correlativity between the two minerals relative to genesis in the sands from rivers and Quaternary sediments, but on eorrelativity in dune sand. The content of Fe_2O_3, MgO, Mno, CaO and A_(12)O_3 in the river sand is high. The content of CaO, MgO, Fe_2O_3 and K2O in fine dune sand is higher than that in coarse one, From the river sand to dune sand and Quaternary sediment sand, the content of trace dements, such as V, Co, Ni, Cu, Zn, La, Nb and Y, has a decrease tendency. Ba and Sr generally concentrate in coarse sand. The differences of mineral and chemical composition are regarded as the results of their different geochemical behaviors in the different conditions.