(1. 中国地质大学(北京) 海洋学院，北京100083；
2. 同济大学 海洋与地球科学学院，上海200092；
3. 自然资源部第二海洋研究所，杭州310012；
4. 自然资源部第一海洋研究所，青岛266061)
摘 要: 以中国大洋48航次在西北太平洋中国多金属结核合同区(马尔库斯-威克海山群山间盆地与麦哲伦海山群山间盆地)采集到的30个站位表层沉积物为研究对象，开展了黏土矿物组成、分布特征及物质来源等方面的相关分析研究工作。结果发现：研究区表层沉积物中黏土矿物类型以伊利石为主，其次为蒙脱石，高岭石及绿泥石含量较低；研究区沉积物中的伊利石主要来源于亚洲大陆的风尘输入。蒙脱石有3种主要物质来源：陆地风化来源(亚洲大陆)、海山(风化)自生来源及富含蒙脱石的洋流(下部环南极深层水)。亚洲风尘输入可能是绿泥石和高岭石的主要物源之一。
关键字: 黏土矿物；物质来源；陆地风化；风尘输入；下部环南极深层水
（1. School of Ocean Sciences, China University of Geosciences, Beijing 100083, China;
2. School of Ocean and Earth Science, Tongji University, Shanghai 200092, China;
3. Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China;
4. First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China）
Abstract:In this paper, the surface sediments of 30 stations collected at the polymetallic nodules contract area in the Northwest Pacific (The abyssal seabed between Marcus-Wake and Magellan seamounts) during the COMAR 48th Cruise were studied, with a specific focus on the characteristics of composition, distribution and provenance of clay minerals. The results indicate that the illite is the most abundant mineral species, smectite is moderate, and kaolinite and chlorite are the lowest. Illite in study area is mainly derived from the input of Asian dust. Smectite may originate from continental weathering (Asian continent), seamount (weathering) autogenesis and smectite-rich currents (lower circumpolar deep water), the input of Asian dust may be one of the major sources of chlorite and kaolinite.
Key words: clay minerals; provenance; continental weathering; dust input; lower circumpolar deep water
