Constraining the tectonic evolution of rifted continental margins by U–Pb calcite dating
Abstract We employ U–Pb calcite dating of structurally-controlled fracture fills within crystalline Caledonian basement in western Norway to reveal subtle large-scale tectonic events that affected this rifted continental margin. The ages (15 in total) fall into four distinct groups with ages mainly...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-05-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-34649-z |
| _version_ | 1797822882528624640 |
|---|---|
| author | Åse Hestnes Kerstin Drost Tor O. Sømme Deta Gasser Thomas Scheiber Henriette Linge David Chew Joachim Jacobs |
| author_facet | Åse Hestnes Kerstin Drost Tor O. Sømme Deta Gasser Thomas Scheiber Henriette Linge David Chew Joachim Jacobs |
| author_sort | Åse Hestnes |
| collection | DOAJ |
| description | Abstract We employ U–Pb calcite dating of structurally-controlled fracture fills within crystalline Caledonian basement in western Norway to reveal subtle large-scale tectonic events that affected this rifted continental margin. The ages (15 in total) fall into four distinct groups with ages mainly ranging from latest Cretaceous to Pleistocene. (1) The three oldest (Triassic-Jurassic) ages refine the complex faulting history of a reactivated fault strand originated from the Caledonian collapse and broadly correlate with known rifting events offshore. (2) Two ages of ca. 90–80 Ma relate to lithospheric stretching and normal fault reactivation of a major ENE-WSW trending late Caledonian shear zone. (3) We correlate five ages between ca. 70 and 60 Ma with far-field effects and dynamic uplift related to the proto-Iceland mantle plume, the effect and extent of which is highly debated. (4) The five youngest ages (< 50 Ma) from distinct NE–SW trending faults are interpreted to represent several episodes of post-breakup fracture dilation, indicating a long-lived Cenozoic deformation history. Our new U–Pb data combined with structural and isotopic data show that much larger tracts of the uplifted continental margin of western Norway have been affected by far-field tectonic stresses than previously anticipated, with deformation continuing into the late Cenozoic. |
| first_indexed | 2024-03-13T10:15:52Z |
| format | Article |
| id | doaj.art-88f1bd68f8414d65877680ebe13fb8c7 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-13T10:15:52Z |
| publishDate | 2023-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-88f1bd68f8414d65877680ebe13fb8c72023-05-21T11:14:35ZengNature PortfolioScientific Reports2045-23222023-05-011311910.1038/s41598-023-34649-zConstraining the tectonic evolution of rifted continental margins by U–Pb calcite datingÅse Hestnes0Kerstin Drost1Tor O. Sømme2Deta Gasser3Thomas Scheiber4Henriette Linge5David Chew6Joachim Jacobs7Department of Earth Science, University of BergenDepartment of Geology, Trinity College Dublin, The University of DublinDepartment of Earth Science, University of BergenDepartment of Environmental Sciences, Western Norway University of Applied SciencesDepartment of Environmental Sciences, Western Norway University of Applied SciencesDepartment of Earth Science, University of BergenDepartment of Geology, Trinity College Dublin, The University of DublinDepartment of Earth Science, University of BergenAbstract We employ U–Pb calcite dating of structurally-controlled fracture fills within crystalline Caledonian basement in western Norway to reveal subtle large-scale tectonic events that affected this rifted continental margin. The ages (15 in total) fall into four distinct groups with ages mainly ranging from latest Cretaceous to Pleistocene. (1) The three oldest (Triassic-Jurassic) ages refine the complex faulting history of a reactivated fault strand originated from the Caledonian collapse and broadly correlate with known rifting events offshore. (2) Two ages of ca. 90–80 Ma relate to lithospheric stretching and normal fault reactivation of a major ENE-WSW trending late Caledonian shear zone. (3) We correlate five ages between ca. 70 and 60 Ma with far-field effects and dynamic uplift related to the proto-Iceland mantle plume, the effect and extent of which is highly debated. (4) The five youngest ages (< 50 Ma) from distinct NE–SW trending faults are interpreted to represent several episodes of post-breakup fracture dilation, indicating a long-lived Cenozoic deformation history. Our new U–Pb data combined with structural and isotopic data show that much larger tracts of the uplifted continental margin of western Norway have been affected by far-field tectonic stresses than previously anticipated, with deformation continuing into the late Cenozoic.https://doi.org/10.1038/s41598-023-34649-z |
| spellingShingle | Åse Hestnes Kerstin Drost Tor O. Sømme Deta Gasser Thomas Scheiber Henriette Linge David Chew Joachim Jacobs Constraining the tectonic evolution of rifted continental margins by U–Pb calcite dating Scientific Reports |
| title | Constraining the tectonic evolution of rifted continental margins by U–Pb calcite dating |
| title_full | Constraining the tectonic evolution of rifted continental margins by U–Pb calcite dating |
| title_fullStr | Constraining the tectonic evolution of rifted continental margins by U–Pb calcite dating |
| title_full_unstemmed | Constraining the tectonic evolution of rifted continental margins by U–Pb calcite dating |
| title_short | Constraining the tectonic evolution of rifted continental margins by U–Pb calcite dating |
| title_sort | constraining the tectonic evolution of rifted continental margins by u pb calcite dating |
| url | https://doi.org/10.1038/s41598-023-34649-z |
| work_keys_str_mv | AT asehestnes constrainingthetectonicevolutionofriftedcontinentalmarginsbyupbcalcitedating AT kerstindrost constrainingthetectonicevolutionofriftedcontinentalmarginsbyupbcalcitedating AT torosømme constrainingthetectonicevolutionofriftedcontinentalmarginsbyupbcalcitedating AT detagasser constrainingthetectonicevolutionofriftedcontinentalmarginsbyupbcalcitedating AT thomasscheiber constrainingthetectonicevolutionofriftedcontinentalmarginsbyupbcalcitedating AT henriettelinge constrainingthetectonicevolutionofriftedcontinentalmarginsbyupbcalcitedating AT davidchew constrainingthetectonicevolutionofriftedcontinentalmarginsbyupbcalcitedating AT joachimjacobs constrainingthetectonicevolutionofriftedcontinentalmarginsbyupbcalcitedating |