Preliminary report, cruises L1-86-NC and L2-86-NC, Escanaba Trough, Gorda Ridge
January 1, 1987
Eight large (up to 200 m across) and many small massive sulfide deposits were photographed and sampled at the sediment-covered Escanaba Trough, southern Gorda Ridge, during S.P. Lee cruises L1-86-NC and L2-86-NC in 1986. The deposits are associated with two volcanic edifices within the sedimentary fill along the axis of Escanaba Trough. The sulfide and other hydrothermal minerals are deposited on the seafloor as well as within the sedimentary section. High concentrations of Pb and As in some of the sulfide samples indicates significant interaction between hydrothermal fluids and sediment at depth.
Citation Information
| Publication Year | 1987 |
|---|---|
| Title | Preliminary report, cruises L1-86-NC and L2-86-NC, Escanaba Trough, Gorda Ridge |
| DOI | 10.3133/ofr87375A |
| Authors | J. L. Morton, W. R. Normark, Stephanie L. Ross, R.A. Koski, M.L. Holmes, Wayne C. Shanks, R.A. Zierenberg, M.W. Lyle, L.M. Benninger |
| Publication Type | Report |
| Publication Subtype | USGS Numbered Series |
| Series Title | Open-File Report |
| Series Number | 87-375 |
| Index ID | ofr87375A |
| Record Source | USGS Publications Warehouse |