(1. 中國(guó)地質(zhì)大學(xué)(北京) 海洋學(xué)院，北京100083；
2. 同濟(jì)大學(xué) 海洋與地球科學(xué)學(xué)院，上海200092；
3. 自然資源部第二海洋研究所，杭州310012；
4. 自然資源部第一海洋研究所，青島266061)
摘 要: 以中國(guó)大洋48航次在西北太平洋中國(guó)多金屬結(jié)核合同區(qū)(馬爾庫(kù)斯-威克海山群山間盆地與麥哲倫海山群山間盆地)采集到的30個(gè)站位表層沉積物為研究對(duì)象，開(kāi)展了黏土礦物組成、分布特征及物質(zhì)來(lái)源等方面的相關(guān)分析研究工作。結(jié)果發(fā)現(xiàn)：研究區(qū)表層沉積物中黏土礦物類型以伊利石為主，其次為蒙脫石，高嶺石及綠泥石含量較低；研究區(qū)沉積物中的伊利石主要來(lái)源于亞洲大陸的風(fēng)塵輸入。蒙脫石有3種主要物質(zhì)來(lái)源：陸地風(fēng)化來(lái)源(亞洲大陸)、海山(風(fēng)化)自生來(lái)源及富含蒙脫石的洋流(下部環(huán)南極深層水)。亞洲風(fēng)塵輸入可能是綠泥石和高嶺石的主要物源之一。
關(guān)鍵字: 黏土礦物；物質(zhì)來(lái)源；陸地風(fēng)化；風(fēng)塵輸入；下部環(huán)南極深層水
（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
