In this paper,the sources and distribution law of 8 heavy-metal elements Cd,Cr,Hg,Ni,Pb,Zn,As,and Cu in the soil of the Taiyuan Basin are researched by such methods as contour map,multifractal, system dynamics modeling etc,and the early warning model of eco-geochemistry is set up based on the geochemical data.
4) The comparative result between geochemical data and biotic character has displayed excellent conformability for research on Late Cretaceous sedimentary formation in southern Tibet and reflects a process of anoxic-improved gradually-oxic-return to normal evolvement.
The contents of Rb and Sr, the initial 87Sr/86Sr ratios (0.70578-0.71437) and other geochemical data of 20 samples suggest that these volcanic rocks belong to the high-K calc-alkaline series of magma formed in the collision zone.
Based on principle and methods for base level cycle, the drilling, well logging, seismic and geochemical data from Hadexun area are analyzed. One I-type and three II-type sequence interfaces of Lower Carboniferous are recognized, and three medium-term base level cycles (SC_1, SC_2, SC_3) corresponding to three transgressive-regressive cycles are classified.
Crude oils in the Qianjiang formation of Qianjiang depression are classified into three types on the basis of geochemical data pertaining to biological marker compounds (such as sterane, terpane, isoprenoids and metal porphrin), carbon isotope, n-alkane and some group characteristics.
In 1991, a study was conducted in eastern Hebei area concerning the application of available 1:200000 regional geochemical data to agricultoral development. On such a basis, afurther test was mado on applying additional fertilizer with more Zn, Mn, Mo, B and Co to an area deficient in trace nutritive elements and aseful element for the purpose of raising the yield of rice, maize, peanut and apple.