Rapidly-formed ferromanganese deposit from the eastern Pacific Hess Deep
January 1, 1977
A thick ferromanganese deposit encrusting fresh basaltic glass has been dredged from the Hess Deep in the eastern Pacific. Contiguous layers within the Fe-Mn crust have been analysed for uranium-series isotopes and metal contents. The rate of accumulation of the deposit, based on the decline of uranium-unsupported 230Th, is calculated to be approximately 50 mm per 106 yr. Based on hydration-rind dating of the underlying glass and an 'exposure age' calculation, this rate is concluded to be too slow, and an accretion rate on the order of 1 mm per 103 yr is more consistent with our data. ?? 1977 Nature Publishing Group.
Citation Information
| Publication Year | 1977 |
|---|---|
| Title | Rapidly-formed ferromanganese deposit from the eastern Pacific Hess Deep |
| DOI | 10.1038/265596a0 |
| Authors | W. C. Burnett, D.Z. Piper |
| Publication Type | Article |
| Publication Subtype | Journal Article |
| Series Title | Nature |
| Index ID | 70000996 |
| Record Source | USGS Publications Warehouse |