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对珠江三角洲表层沉积物的微量元素和沉积磷酸盐的研究,初步认为B、Sr、Ba含量和Ca/Ca+Fe比值具有良好的指相性.得出在珠江三角洲B>100ppm,Sr>160ppm,Ba>400ppm,Ca/Ca+Fe>0.80为海相;B<50ppm,Sr<60ppm,Ba<300ppm,Ca/Ca+Fe<0.40为陆相.认为珠江三角洲晚更新世以来受到两次海侵.
According to the trace elements and sedimentary phosphates in the surface sediments of the Pearl River Delta, the content of B, Sr, Ba and the ratio of Ca / Ca + Fe have good fingerprinting.It is concluded that in the Pearl River Delta B> 100ppm, Sr> 160ppm, Ba> 400ppm, Ca / Ca + Fe> 0.80 for the marine phase; B <50ppm, Sr <60ppm, Ba <300ppm and Ca / Ca + Fe <0.40 for the continental facies. .