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Clift, Peter D; Carter, Andrew; Hurford, Anthony J (1996): Apatite fission track analytical data for samples from ODP Leg 152. PANGAEA,, Supplement to: Clift, PD et al. (1996): Constraints on the evolution of the East Greenland Margin: Evidence from detrital apatite in offshore sediments. Geology, 24(11), 1013-1016,;2

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We test a new approach to understanding the tectonic evolution of passive margins by using fission-track analysis on detrital apatites from sediments deposited offshore East Greenland. These apatites have not undergone postdepositional track annealing and therefore reflect provenance. The apatites preserve a component of the source rocks' thermal history that otherwise may not be retained within the present-day outcrop. Fission-track derived denudational histories from samples at Ocean Drilling Program drill sites offshore East Greenland at lat 63°N are compared with data from the onshore Singertat Complex. Previous apatite fission-track studies and geomorphic mapping of the East Greenland coast have shown that locally up to 6 km of denudation may have occurred, implying significant tectonic or magmatic activity starting as much as 30 m.y. after breakup at 56 Ma. In contrast, apatite fission-track data presented here record <2 km of Cenozoic denudation in southeast Greenland, probably driven by magmatic underplating at the time of breakup. Large-magnitude, postrift denudation of East Greenland is restricted to the area around Kangerdlugssuaq (68°N). The timing (<40-50 Ma) and magnitude are in accord with revised plume track models suggesting that the Iceland plume crossed the margin here during the late Eocene.
Median Latitude: 63.342200 * Median Longitude: -39.381800 * South-bound Latitude: 63.092900 * West-bound Longitude: -39.781800 * North-bound Latitude: 63.471400 * East-bound Longitude: -38.638900
Date/Time Start: 1993-09-30T21:59:00 * Date/Time End: 1993-11-12T16:50:00
Minimum Elevation: -1868.0 m * Maximum Elevation: -533.0 m
152-914B * Latitude: 63.462300 * Longitude: -39.724700 * Date/Time Start: 1993-09-30T21:59:00 * Date/Time End: 1993-10-03T14:45:00 * Elevation: -533.0 m * Penetration: 245 m * Recovery: 17.78 m * Location: Greenland Sea * Campaign: Leg152 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 17 cores; 151.2 m cored; 0 m drilled; 11.8 % recovery
152-915A * Latitude: 63.471400 * Longitude: -39.781800 * Date/Time Start: 1993-10-05T02:15:00 * Date/Time End: 1993-10-07T14:15:00 * Elevation: -533.0 m * Penetration: 209.4 m * Recovery: 32.84 m * Location: Greenland Sea * Campaign: Leg152 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 26 cores; 209.4 m cored; 0 m drilled; 15.7 % recovery
152-918D * Latitude: 63.092900 * Longitude: -38.638900 * Date/Time Start: 1993-10-28T21:30:00 * Date/Time End: 1993-11-12T16:50:00 * Elevation: -1868.0 m * Penetration: 1310.1 m * Recovery: 254.58 m * Location: Greenland Sea * Campaign: Leg152 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 113 cores; 1012.8 m cored; 0 m drilled; 25.1 % recovery
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Sample code/labelSample labelClift, Peter DODP sample designation
3Age, dated materialDated materialClift, Peter Destimated stratigraphic age, Ma
4Number of testsTests#Clift, Peter Dnumber of crystals
5Fission-tracks, density, counted in stanp d106 #/cm2Clift, Peter D
6Fission-tracksN d106 #/cm2Clift, Peter D
7Fission-tracks, spontaneous, densityp s106 #/cm2Clift, Peter D
8Fission-tracks, spontaneousN s106 #/cm2Clift, Peter D
9Fission-tracks, induced, densityp i106 #/cm2Clift, Peter D
10Fission-tracks, inducedN i106 #/cm2Clift, Peter D
11Age, datedAge datedkaClift, Peter D
12Age, dated standard deviationAge dated std dev±Clift, Peter D
13Age, maximum/oldAge maxkaClift, Peter Dold age component
14Age, standard deviationAge std dev±Clift, Peter Dof old age component
15Fission-track length, meanMTLµmClift, Peter D
16Fission-track length, mean, standard deviationMTL std dev±Clift, Peter D
17Standard deviationStd dev±Clift, Peter D
18Number of observationsNOBS#Clift, Peter Dnumber of tracks counted
134 data points

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