Composition of massive sulfide deposits from the sediment-covered floor of Escanaba Trough, Gorda Ridge: implications for depositional processes
Canadian Mineralogist
By: Randolph A. Koski, Wayne C. Shanks III, Wendy A. Bohrson, and Robert L. Oscarson
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Abstract
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.
Suggested Citation
Koski, R.A., Shanks, W.C., Bohrson, W.A., Oscarson, R.L., 1988, Composition of massive sulfide deposits from the sediment-covered floor of Escanaba Trough, Gorda Ridge: implications for depositional processes: Canadian Mineralogist, v. 26 pt 3, p. 655-673.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Composition of massive sulfide deposits from the sediment-covered floor of Escanaba Trough, Gorda Ridge: implications for depositional processes |
| Series title | Canadian Mineralogist |
| Volume | 26 pt 3 |
| Year Published | 1988 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Canadian Mineralogist |
| First page | 655 |
| Last page | 673 |
| Conference Title | Seafloor Hydrothermal Mineralization |
| Conference Location | Montreal, Que, Can |
| Conference Date | 5 February 1987 through 6 February 1987 |