摘要
黄海西朝鲜湾是潮流流速特别高、潮流沙脊群明显发育的水动力沉积环境区,具有有利的砂矿成矿条件.为了分析其成矿特征,我们采用波浪潮流共同作用下潮流泥沙数值模拟的计算方法,模拟各级波浪下潮流、海底冲淤状态和全输沙量过程,由此分析按形成时代和主要分选控制因素划定的砂矿成因型和漂沙分选方式.本区砂矿属于潮流波浪控制的现代滨海砂矿,砂矿由潮流波浪掀沙、潮流输沙、风暴浪混沙进行平面及垂直分选形成,研究区类似一个巨型砂矿分选机,分选强度有利于砂矿成矿的地区大多为0～20m海域,矿层延伸到风暴浪最大冲刷范围之外.
Digital simulation technique of silt under the co-action of wave and tidal currents can be used both in mineralization analysis of tidal sand sedimentary area and in exploration of littoral placer deposits. The placer deposits in the study area belong to modern littoral minerals controlled by tidal currents and waves, and are formed by horizontal and vertical sorting of drift sand. The study area seems a large sorting machine for placer deposits, with the favorite sorting positions occurring in 0~20 m deep sea areas. Within the maximum scouring thickness of storm surge, grades of placer deposits increase with the increase of thickness.
出处
《海洋地质动态》
2005年第1期18-23,46,共6页
Marine Geology Letters
基金
国家自然科学基金项目(40376028
50279030)
