Preliminary report, cruises L1-86-NC and L2-86-NC, Escanaba Trough, Gorda Ridge

J. L. Morton; W. R. Normark; Stephanie L. Ross; R.A. Koski; M.L. Holmes; Wayne C. Shanks III; R.A. Zierenberg; M.W. Lyle; L.M. Benninger

doi:10.3133/ofr87375A

Preliminary report, cruises L1-86-NC and L2-86-NC, Escanaba Trough, Gorda Ridge

Open-File Report 87-375-A

By: J. L. Morton, W. R. Normark, Stephanie L. Ross, R.A. Koski, M.L. Holmes, Wayne C. Shanks III, R.A. Zierenberg, M.W. Lyle, and L.M. Benninger

https://doi.org/10.3133/ofr87375A

Links

Document: Report (pdf)
Download citation as: RIS | Dublin Core

Abstract

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.

Additional publication details
Publication type	Report
Publication Subtype	USGS Numbered Series
Title	Preliminary report, cruises L1-86-NC and L2-86-NC, Escanaba Trough, Gorda Ridge
Series title	Open-File Report
Series number	87-375
Chapter	A
DOI	10.3133/ofr87375A
Year Published	1987
Language	English
Publisher	U.S. Geological Survey
Description	20 p.
Google Analytic Metrics	Metrics page