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1992年6月我们开展了东海冲绳海槽热水活动的调查,这是我国首次独自组织进行的热水活动调查,本文即这次调查研究的基本成果.调查的热水活动区位于海槽中部(126°50′～127°30′E,27°20′～27°50′N),为了对比还在海槽北部非热水区(128°20′～129°10′E,30°30′～31°40′N)采集了沉积物样品,进行了元素和同位素分析,热水区分析20个表层样和2个柱样,非热水区分析8个表层样和2个柱样,分析方法详见文献[2」.研究结果表明:(1)与非热水工相比(表1),热水区沉积物明显富集Mn,Cu,Pb,Co,Ni,V,As,Cd,Mo,W,Sb,Bi和Hg等(富集以大于1.5倍计);如与东海大陆架相比热水区富集的元素更加明显,除富集上述无素外,还富集Zn,Au和Ag等.由图1显而易见,以陆源为主的元素Ti,Rb,Zr,Th,Ce,Y 和亲生物的元素Ca,Sr等在热水区和非热水区变化不大,而Mn和亲硫性强的元素Hg,As,Sb,Bi,Cu,Pb,Co,Ni,Cd等含量显著增高,后者显然是由热水活动所贡献.
In June 1992, we conducted a survey of the hot water activities in the Okinawa Trough in the East China Sea, which is the first survey of hot water activities organized by our country for the first time in this paper. This article is the basic result of this investigation. The surveyed hot water activity area is located in the middle of the trough (126 ° 50'-127 ° 30'E, 27 ° 20'-27 ° 50'N). For the sake of comparison, in the non-hot water area of the northern trough (128 ° 20 '~ 129 ° 10'E, 30 ° 30 '~ 31 ° 40'N) sediment samples were collected for elemental and isotopic analysis, hot water area analysis of 20 surface samples and 2 column samples, non-hot water area analysis of 8 surface samples and 2 column samples, The analysis method is described in reference [2]. The results show that: (1) Compared with non-hot water workers (Table 1), the sediments in hot water area are obviously enriched in Mn, Cu, Pb, Co, Ni, V, Cd, Mo, W, Sb, Bi and Hg, etc. (enriched by more than 1.5 times); as compared with the East China Sea shelf, the elements enriched in the hot water area are more obvious. In addition to enrichment of the above elements, Zn , Au, Ag, etc. As obvious from Fig. 1, the terrestrial-based elements Ti, Rb, Zr, Th, Ce and Y and the elements Ca and Sr from the living things show little change in hot and non-hot water areas, Mn and the strong sulfur-binding elements such as Hg, As, Sb, Bi, Cu, Pb, Co, Ni and Cd were significantly increased, Obviously contributed by hot water activities.