Gold and rare-earth elements in sediments from the East Pacific Rise |
| |
| Authors: | DZ Piper PA Graef |
| |
| Institution: | Department of Oceanography, University of Washington, Seattle, Wash. U.S.A. |
| |
| Abstract: | The distribution of rare-earth elements and gold have been measured in surface sediments of cores collected along a traverse across the East Pacific Rise at approximately 39° S latitude. The shale-normalized rare earth pattern of crestal sediments supports a seawater source. In samples from the flanks of the rise, concentrations of individual rare earths increase with an increase in Al2O3, suggesting that the contribution by lithogenic material becomes significant, in addition to the seawater contribution.The concentration of gold in flank sediments also suggests a lithogenic origin. In crestal sediments, however, unlike the rare earths, its concentration increases over its concentration in flank sediments. It is concluded that similar to iron, which also exhibits a maximum in crestal sediments, a fraction of the gold in these sediments has a volcanogenic source. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
