作 者：张杨硕 乔淑卿[1,2,3] 石学法[1,2,3] 杨刚[1,2] 刘升发[1,2,3] ZHANG Yangshuo1,2 , QIAO Shuqing1,2,3, SHI Xuefa1,2,3, YANG Gang1,2, LIU Shengfa1,2,3,DU Dewen1,2, Narumol Kornkanitnan4, Somkiat Khokiattiwong5, YAN Quanshu1,2, ZHANG Haitao1,2, CAO Deka1,2 （1. The First Institute of Oceanography, State Oceanic Administration. , Qingdao 266061; 2. Key Laboratory of Marine Sedimentology ~ Environmental Geology, Qingdao 266061 3. Marine Geology and Environment Laboratory Process, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061; 4. Marine and Coastal Research Center, Samui Sakhon Province 7400, Thailand; 5. Phuket Marine Biological Center, Muaeng Phuket 83000, Thailand） 机构地区：[1]国家海洋局第一海洋探讨所,青岛266061 出 处：《海洋地质与第四纪地质》2017年第1期86-92,共7页Marine Geology ＆ Quaternary Geology 基 金：全球变化与海气相互影响专项（GAS102-SCS-CJ03;GASIGEOGE-03）;青岛海洋科学与技术国家实验室鳌山科技创新计划项目（2017ASKJ03）;东南亚海岸带脆弱性合作调查探讨致谢：航次调查中分别使用了MV.SEAFEDC和MV.SEAFEDC2调查船.泰国普吉海洋生物中心、泰国海洋与海岸资源探讨中心的员工以及国家海洋局第一海洋探讨所的吴永华副探讨员、王昆山副探讨员、李传顺副探讨员、胡利民副探讨员等参加了泰国湾航次,在此一并致谢. 摘 要：基于对泰国湾164个表层沉积物样品的粒度略论测试结果，使用Gao-Collins沉积物粒径趋势略论措施，探讨了泰国湾底质沉积物的分布特征和输运趋势。探讨区内的沉积物主要为粉砂、砂质粉砂和粉砂质砂，分选差，泰语论文题目，分选系数变化范围为1．3～2．9，平均值为1．8，泰语论文题目，偏度变化范围为-1．8～2．5，平均值为1．2。根据沉积物粒度趋势特征，探讨区分为1区、2区和3区3个区域，其中1区的平均分选系数和偏度分别为l.73、0．91；2区沉积物分选系数和偏度分别为1．81和1．33；3区沉积物分选系数和偏度分别为1．91和1．24。1区和2区河口附近广泛分布粉砂和泥等细粒级沉积物（平均粒径为6．5中）；而1区与2区交界处和3区的近岸区域沉积物主要为粉砂质砂（平均粒径为5．5Ф）。探讨区北部、中部和西南部近岸沉积物相比探讨区其他地区，分选更差一些。泰国湾沉积物运移受河流、洋流和季风的共同作用，其中1区受控因素为泰国湾湾口的河流，运移方向为从河口向外；洋流是2区南部沉积物的主要运移动力，运移方向为从外围向湾中心；沿岸流是3区沉积物的主要运移动力，使3区沉积物的运移方向为离岸方向。在河流和洋流共同影响下，泰国湾沉积物有向苏梅岛附近运移的趋势。Based on the grain size data acquired from 164 bottom samples, we studied the distribution pat- tern and transporting trend of the sediments in the Gulf of Thailand （GOT） using the Gao-Collins＇s meth- od for sediments grain size analysis. In general, most of the sediments in the study area are poorly sorted, and the sorting coefficient varies from 1. 3 to 2. 9 with an average of 1.8 and the skewness varies from --1.8 to 2.5 （with a mean value of 1.2）. According to the research results, the study area is divided into three provinces, i.e. the provinces 1, 2 and 3. The sorting and skewness in the province 1 are 1.73 and 0. 91, and those in the province 2 and 3are 1. 81,1. 33 and 1. 91, 1. 24, respectively. It means that fine- grained sediments （silt and mud） with mean grain size of 6.5q） are widely distributed in provinces 1 and 2, while the coarse-grained sediment （silty sand） with mean grain size of 5.5q） are mainly distributed in the cross area between province 1 and 2 and the near-shore area of province 3. The sorting of sediments from the coastal areas including northern , middle- and southwestern parts of GoT is poorer than that from oth- er regions. We suggest that sediment transport in the GoT is mainly controlled by three factors, namely rivers, ocean current and East Asian monsoon. In details, for the provinces 1, the sediment transport is controlled by rivers which take sediments from estuaries into deep water areas. For the province. 2, ocean current dominates the sediment transportation in the peripheral part of the province to the center of GoT. As for the province 3, coastal current plays a critical role to move sediments away from the nearshore area. Under the influences of these three factors mentioned above, a sediment depocenter is formed around the Sumui Island. 关 键 词：粒度 输运趋势 |
