Portal de Periódicos da CAPES

Constraints on the evolution of the East Greenland Margin: Evidence from detrital apatite in offshore sediments

1996; Geological Society of America; Volume: 24; Issue: 11 Linguagem: Inglês

10.1130/0091-7613(1996)024 2.3.co;2

1943-2682

Peter D. Clift, Andrew Carter, Anthony J. Hurford,

Methane Hydrates and Related Phenomena

Research Article| November 01, 1996 Constraints on the evolution of the East Greenland Margin: Evidence from detrital apatite in offshore sediments Peter D. Clift; Peter D. Clift 1Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 Search for other works by this author on: GSW Google Scholar Andrew Carter; Andrew Carter 2Research School of Geological and Geophysical Sciences, Birkbeck and University Colleges, London WC1E 6BT, United Kingdom Search for other works by this author on: GSW Google Scholar Anthony J. Hurford Anthony J. Hurford 2Research School of Geological and Geophysical Sciences, Birkbeck and University Colleges, London WC1E 6BT, United Kingdom Search for other works by this author on: GSW Google Scholar Author and Article Information Peter D. Clift 1Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 Andrew Carter 2Research School of Geological and Geophysical Sciences, Birkbeck and University Colleges, London WC1E 6BT, United Kingdom Anthony J. Hurford 2Research School of Geological and Geophysical Sciences, Birkbeck and University Colleges, London WC1E 6BT, United Kingdom Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1996) 24 (11): 1013–1016. https://doi.org/10.1130/0091-7613(1996)024 2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Peter D. Clift, Andrew Carter, Anthony J. Hurford; Constraints on the evolution of the East Greenland Margin: Evidence from detrital apatite in offshore sediments. Geology 1996;; 24 (11): 1013–1016. doi: https://doi.org/10.1130/0091-7613(1996)024 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract 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. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.