马里亚纳海槽海底热液活动和热液硫化物研究

本文根据马里亚纳海槽海底热液活动和热液硫化物产状及矿物化学特征,探讨了存在的高温和中低温热液产物的矿物相及其赋存形式,认为是一种有别于大洋中脊和深断裂带的规模较小的海底热液活动类型.     

HYDROTHERMAL ACTIVITY AND SULFIDES IN THE MARIANA TROUGH

The submarine hydrothermal activity, its occurrence, the minerals and the chemical features of the hydrothermal sulfides in the Mariana Trough are described. The mineral phases and their existing forms of the hydrothermal products formed at high temperature and intermediate-low temperature are discussed. It has been considered that the hydrothermal activity in the Mariana Trough isa small-scale one, different from those on the mid-ocean ridges and in the deep fracture zones.     

OXYGEN ISOTOPE COMPOSITIONS OF SEAWATERS IN THE HUANGHAI(YELLOW) SEA AND THE BOHAI SEA

The characteristics of oxygen isotope compositions and distributions of the seawaters inthe Huanghai(Yellow) Sea and the Bohai Sea have been investigated based on δ~(18)O data meas-ured for 608 water samples. By using the property of tracing atoms, the mixing and theinfluencing range of the diluted freshwater of the Huanghe (Yellow) River and the exhibitionof δ~(18)O values in the movements of the Huanghai Sea warm current and its residual flowshave been discussed. Particularly, the regional, vertical, seasonal and tidal changes of the δ~(18)Ovalues of the waters influenced by the Huanghe River have also been studied. A beneficialexploration was thus made for the application of stable isotope to the physical oceanography.     

渤、黄海海水的氧同位素组成研究

本文根据测得的608个水样δ~(18)O数据,论述了渤、黄海海水的氧同位素组成及其分布特点。并运用其示踪原子特性讨论了黄河冲淡水的混合作用和影响范围、黄海暖流及其余脉运移的δ~(18)O值显示。文中还着重研究了现代黄河影响水域δ~(18)O值的区域变化、垂向变化、季节变化和潮时变化。