2026-10-15T15:42:08Z https://oai.datacite.org/oai

doi:10.1594/pangaea.712923 2025-06-27T05:13:29Z PANGAEA PANGAEA.REPOSITORY

Apatite fission track analytical data for samples from ODP Leg 152 Clift, Peter D Carter, Andrew Hurford, Anthony J PANGAEA 1996 Issued: 1996 doi:10.1130/0091-7613(1996)024<1013:coteot>2.3.co;2 url:ftp://rock.geosociety.org/pub/reposit/1996/9658.pdf Event label Sample code/label Age, dated material Number of tests Fission-tracks, density, counted in stan Fission-tracks Fission-tracks, spontaneous, density Fission-tracks, spontaneous Fission-tracks, induced, density Fission-tracks, induced Age, dated Age, dated, standard deviation Age, maximum/old Age, standard deviation Fission-track length, mean Fission-track length, mean, standard deviation Standard deviation Number of observations Drilling/drill rig DSDP/ODP/IODP sample designation Leg152 Joides Resolution Ocean Drilling Program (ODP) 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 &lt;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 (&lt;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. Supplement to: Clift, Peter D; Carter, Andrew; Hurford, Anthony J (1996): Constraints on the evolution of the East Greenland Margin: Evidence from detrital apatite in offshore sediments. Geology, 24(11), 1013-1016 en Dataset Supplementary Dataset text/tab-separated-values Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode