| 摘要: |
| 依据锦州湾12个站点现场实测海流资料（1991年6月和8月二个航次）和潮流场数值模拟结果，获得了该湾潮流和余流的分布规律。并基于41个站点重矿物鉴定资料，给出了重矿物分布规律和矿物类型分区。结果表明，该湾潮流具有潮驻波特征。总的流动趋势为涨潮时从湾口南岸朝西北方向流入湾内，落潮时朝东南向流出湾外，葫芦岛—大酒篓北侧是锦州湾潮流主要通道和强流区，最大涨、落潮流流速在1kn以上。湾内余流随湾形按逆时针方向流动，湾口北部最强余流可达16 cm/s。流场的强弱分布与重矿物的类型分区密切相关，经分析研究得出了重矿物与流场之间的定量分配关系。 |
| 关键词: 潮流场 重矿物 |
| DOI： |
| 分类号: |
| 基金项目:国家海洋局自然科学基金资助项目，068号 |
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| VARIATION OF HEAVY MINERALS IN THE JINZHOU BAY CURRENT FIELD |
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LIU Heng-kui,ZHANG Feng-lin,ZHENG Yan-ying
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Institute of Marine Environmental Protection, State Oceanic Administration, Dalian, 116023
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| Abstract: |
| In this work, measured current data from 12 surveying stations and mathematical modeling were used to obtain the distribution pattern of the tidal and residual currents in Jinzhou Bay, and data from 41 surveying stations were used to obtain the distribution pattern and divisions of heavy minerals there, the tidal currents were found to have standing wave characteristics. On the whole, the tidal currents along the coast off the south mouth of the bay tended to flow in northwest direction toward the bay during rising tide and to flow out the bay in southeast direction during edding tide. The main passage and region of high velocity tidal currents in Jinzhou Bay were located at the north side of Hulu Island-Dajiulou, where rising and edding velocity of tidal currents were over l kn. The residual currents flowed with the configuration of the bay in anticlockwise direction. The residual currents peak velocity could reach to l6 cm/s at the north mouth of the bay. The heavy minerals division positively correlated with the current field distribution. The magnetite contents (%) and tidal currents velocity were respectly power functions of the distance from the top of the bay toward the mouth of the bay along the section (A-A') in the bay. The correlations are both W= 0.584L1.244 (r = 0.992) and V= 0.917L0.813 (r = 0.998). The relationship between the current velocities and magnetite contents (%) also showed the power function correlation, V= 0.544W0.648 (r = 0.994). |
| Key words: Tidal current field, Heavy minerals |
