Composition of massive sulfide deposits from the sediment-covered floor of Escanaba Trough, Gorda Ridge: implications for depositional processes
Massive sulfide deposits with two distinct compositions are spatially related to volcanic edifices that penetrate up to 500 m of turbiditic sediment in Escanaba Trough (ET), southern Gorda Ridge. The mineralogy, metal content, sulfur isotope composition, and hydrocarbon content of massive sulfides from ET reflect the extensive interaction between underlying turbiditic sediment and hydrothermal fluid. Pyrrhotite-rich sulfide mounds are inferred to have formed under gentle temperature and chemical gradients related to diffuse, low-velocity flow through disrupted sediment near the sediment-capped hills.
Citation Information
Publication Year | 1988 |
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Title | Composition of massive sulfide deposits from the sediment-covered floor of Escanaba Trough, Gorda Ridge: implications for depositional processes |
Authors | Randolph A. Koski, Wayne C. Shanks, Wendy A. Bohrson, Robert L. Oscarson |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Canadian Mineralogist |
Index ID | 70014331 |
Record Source | USGS Publications Warehouse |