Plank, Terry; Balzer, Vaughn; Carr, Michael J (2002): Chemical composition of ODP Leg 138 sediments [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.713295, Supplement to: Plank, T et al. (2002): Nicaraguan volcanoes record paleoceanographic changes accompanying closure of the Panama gateway. Geology, 30, 1087-1090, https://doi.org/10.1130/0091-7613(2002)030%3C1087:NVRPCA%3E2.0.CO;2
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Abstract:
A major oceanographic event preserved in the Cocos plate sedimentary column survived subduction and is recorded in the changing composition of Nicaraguan magmas. A uranium increase in these magmas since the latest Miocene (after 7 Ma) resulted from the 'carbonate crash' at 10 Ma and the ensuing high organic carbon burial in the sediments. The response of the arc to this paleoceanographic event requires near steady-state sediment recycling at this margin since 20 Ma. This relative stability in sediment subduction invites one of the first attempts to balance sedimentary input and arc output across a subduction zone. Calculations based on Th indicate that as much as 75% of the sedimentary column was subducted beneath the arc. The Nicaraguan margin is one of the few places to observe such strong links between the oceans and the solid earth.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 8.751905 * Median Longitude: -92.535780 * South-bound Latitude: 7.921310 * West-bound Longitude: -94.590800 * North-bound Latitude: 9.582500 * East-bound Longitude: -90.480760
Date/Time Start: 1991-05-11T10:24:00 * Date/Time End: 1991-08-09T06:00:00
Event(s):
138-844B * Latitude: 7.921310 * Longitude: -90.480760 * Date/Time Start: 1991-08-09T06:00:00 * Date/Time End: 1991-05-11T10:24:00 * Elevation: -3414.5 m * Penetration: 290.9 m * Recovery: 289.92 m * Location: North Pacific Ocean * Campaign: Leg138 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 31 core; 290.9 m cored; 0 m drilled; 99.7 % recovery
138-845A * Latitude: 9.582500 * Longitude: -94.590800 * Date/Time Start: 1991-05-13T19:45:00 * Date/Time End: 1991-05-16T06:29:00 * Elevation: -3704.2 m * Penetration: 291.6 m * Recovery: 292.63 m * Location: North Pacific Ocean * Campaign: Leg138 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 31 core; 291.6 m cored; 0 m drilled; 100.4 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
Download Data
Datasets listed in this publication series
- Plank, T; Balzer, V; Carr, MJ (2002): (Table DR1) Chemical composition of ODP Hole 138-844B sediments. https://doi.org/10.1594/PANGAEA.713292
- Plank, T; Balzer, V; Carr, MJ (2002): (Table DR1) Chemical composition of ODP Hole 138-845A sediments. https://doi.org/10.1594/PANGAEA.713293