Hart_Staudigel_1978.zip (5.1 kB)

Rubidium and Strontium chemistry of oceanic crust

Download (5.1 kB)
dataset
posted on 22.11.2019 by Stanley R Hart, Hubert Staudigel
Times of vein mineral deposition in the ocean crust have been determined both by Rb-Sr isochron ages of vein smectites and by comparison of 87Sr/86Sr ratios of vein calcites with the known variations of seawater 87Sr/86Sr ratio with time. Results from drilling sites 105, 332B and 418A, Atlantic Ocean, which have basement formation ages of 155 m.y., 3.5 m.y., and 110 m.y., respectively, show that vein deposition is essenrially complete within 5-10 m.y. after formation of the basaltic crust. This provids direct evidence that hydrothermal circulation of sea-water through the oceanic crust is an important process for only 5-10 m.y. after crust formation.

History

Year

1978

Size

2 datasets

Coverage

* Median Latitude: 29.1321116667 * Median Longitude: -60.17163 * South-bound Latitude: 25.035 * West-bound Longitude: -69.1733 * North-bound Latitude: 36.8787 * East-bound Longitude: -33.641 * Date/Time Start: 1970-05-13T00:00:00 * Date/Time End: 1977-02-10T00:00:00

Event(s)

11-105 * Latitude: 34.8953 * Longitude: -69.1733 * Date/Time: 1970-05-13T00:00:00 * Elevation: -5251.0 * Penetration: 633 m * Recovery: 195.9 m * Location: North Atlantic/HILL * Campaign: Leg11 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 43 cores; 363 m cored; 0 m drilled; 54 % recovery 37-332B * Latitude: 36.8787 * Longitude: -33.641 * Date/Time: 1974-06-17T00:00:00 * Elevation: -1806.0 * Penetration: 721.5 m * Recovery: 122.9 m * Location: North Atlantic/VALLEY * Campaign: Leg37 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 48 cores; 582.5 m cored; 0 m drilled; 19.4 % recovery 51-417A * Latitude: 25.1105 * Longitude: -68.0413 * Date/Time: 1976-12-02T00:00:00 * Elevation: -5468.0 * Penetration: 417 m * Recovery: 250.4 m * Location: North Atlantic/CONT RISE * Campaign: Leg51 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 43 cores; 389.1 m cored; 27.8 m drilled; 64.4 % recovery 52-418A * Latitude: 25.035 * Longitude: -68.0573 * Date/Time: 1977-02-10T00:00:00 * Elevation: -5511.0 * Penetration: 570.5 m * Recovery: 205.5 m * Location: North Atlantic/CONT RISE * Campaign: Leg52 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 48 cores; 374 m cored; 0 m drilled; 54.9 % recovery

Project(s)

Deep Sea Drilling Project (DSDP)

Licence

Exports

Read the peer-reviewed publication

Logo branding

Keyword(s)

Licence

Exports