| 摘要: |
| 本文对加罗林深水盆地中的锰结核在形成过程中的生物作用进行了研究。从结核及其周围底质中的众多生物活动痕迹的出现和特征,说明大洋深部锰结核所处环境中存在着十分活跃的底栖生物活动。正是由于这些生物的活动,才使锰结核免于被“沉积雨”所埋藏。另外,由于生物的作用,也为锰结核的沉积、增长提供有利的微化学环境,对锰结核的形成起着重要的作用。 |
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| THE BIOLOGICAL EFFECT ON PROCESS OF MANGANESE NODULES GROWING IN THE CAROLINE BASIN, SOUTHWESTERN PACIFIC |
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| Abstract: |
| Evidences from some manganese nodules of Caroline Basin show that there exist various kinds of benthonic organisms around nodules and their benthonic action is related to the growth of nodules on sea floor. Benthonic fauna tends to raise or turn over these nodules by boring or burrowing into nodules, and scavenge sediments covering the surface of nodules by feeding. All of those actions enable nodules to remain at the interface between the sediment and water for a long time although the growing rate of manganese nodules is extremely slower than that of sedimentation. It has been found that a large number of organic detritus usually occur in the manganese nodules as their nuclei. Probably there are some biochemical effects there, which are favourable to cohere or precipitate manganese oxide. In addition, the fact that micromanganese nodules mostly occur on the inside wall of burrows indicates that benthonic action can bring certain dissolved oxygen from deep sea water into burrows and provides an oxidized local condition which is favour able for the precipitation of manganese oxide. |
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