海洋地质与第四纪地质2011，Vol.31Issue(2)：21-30,10.DOI:10.3724/SP.J.1140.2011.02021
中印度洋海盆多金属结核地质特征
GEOLOGICAL CHARACTERISTICS OF POLYMETALLIC NODULES IN THE CENTRAL INDIAN OCEAN AND COMPARISON WITH THOSE FROM CC ZONE IN THE EASTERN PACIFIC
摘要
Abstract
The mineralogy and chemical components of polymetallic nodules and sediment samples collected by R/V DAYANG YIHAO in the central Indian Ocean in 2007 were studied by means of XRD, Mossbaure, XRF and ICPMS. The nodules occur in siliceous ooze in shapes of cauliflower, fragment, waxberry and parallel nodules. Medium-sized and small nodules are dominant, with an average abundance of 4. 213kg/m2. The nodules consist of todorokite, vernadite, birnessite and goethite with small amount of phillipsite,quartz etc. The average grade or the total content of Cu, Co and Ni is 2. 385％. The cauliflower-shaped nodules are rich in Mn, Ni, Cu, with a high Mn/Fe ratio (5.09～6.33), and the parallel nodules are rich in Fe, Co, with a low Mn/Fe ratio (1.03～1.36). The REE patterns of the nodules are basically similar,characterized by I.REE enrichment and a positive Ce anomaly. However, the total REE and Ce anomaly of the parallel nodules is much higher than that of the cauliflower-shaped nodules. The nodules from central Indian Ocean basin have similar mineral composition and REE patterns with those of eastern Pacific basin,suggesting that they possibly have similar origin, but the average abundance and grade of the nodules from central Indian Ocean basin is lower than those from the eastern Pacific basin.关键词
多金属结核/对比/中印度洋海盆/东太平洋海盆Key words
polymetallic nodules/ comparison/ Central Indian Ocean Basin/ Eastern Pacific Basin分类
海洋科学引用本文复制引用
何高文,邓希光,杨胜雄..中印度洋海盆多金属结核地质特征[J].海洋地质与第四纪地质,2011,31(2):21-30,10.基金项目
中国大洋协会国际海底区域研究项目(DYXM-115-01-1-02) （DYXM-115-01-1-02）
国土资源部地质大调查项目(1212010811049-03) （1212010811049-03）
