Apatite fission track analytical data for samples from ODP Leg 152

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 p...

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Bibliographic Details
Main Authors: Clift, Peter D, Carter, Andrew, Hurford, Anthony J
Format: Dataset
Language:English
Published: PANGAEA 1996
Subjects:
152-914B
152-915A
152-918D
Age
dated
dated material
dated standard deviation
maximum/old
standard deviation
DRILL
Drilling/drill rig
DSDP/ODP/IODP sample designation
Event label
Fission-track length
mean
Fission-tracks
density
counted in stan
induced
spontaneous
Greenland Sea
Joides Resolution
Leg152
Number of observations
Number of tests
Ocean Drilling Program
ODP
Sample code/label
Greenland
East Greenland
Iceland
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.712923
https://doi.org/10.1594/PANGAEA.712923
Description
Summary: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.

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