Crustal Heterogeneity Onshore Central Spitsbergen: Insights From New Gravity and Vintage Geophysical Data
Abstract Gravity data provide constraints on lateral subsurface density variations and thus provide crucial insights into the geological evolution of the region. Previously, gravity data from the Norwegian Arctic archipelago of Svalbard comprised an onshore regional gravity database with coarse stat...
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| Format: | Article |
| Language: | English |
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Wiley
2025-01-01
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| Series: | Geochemistry, Geophysics, Geosystems |
| Online Access: | https://doi.org/10.1029/2024GC011563 |
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| author | Kim Senger Fenna Ammerlaan Peter Betlem Marco Brönner Marie‐Andrée Dumais Jomar Gellein Tormod Henningsen Julian Janocha Erik P. Johannessen Jonas Liebsch Jakob Machleidt Tereza Mosočiová Snorre Olaussen Bo Olofsson Nil Rodes Sofia Rylander Grace E. Shephard Aleksandra Smyrak‐Sikora Juan D. Solano‐Acosta Anna Sterley |
| author_facet | Kim Senger Fenna Ammerlaan Peter Betlem Marco Brönner Marie‐Andrée Dumais Jomar Gellein Tormod Henningsen Julian Janocha Erik P. Johannessen Jonas Liebsch Jakob Machleidt Tereza Mosočiová Snorre Olaussen Bo Olofsson Nil Rodes Sofia Rylander Grace E. Shephard Aleksandra Smyrak‐Sikora Juan D. Solano‐Acosta Anna Sterley |
| author_sort | Kim Senger |
| collection | DOAJ |
| description | Abstract Gravity data provide constraints on lateral subsurface density variations and thus provide crucial insights into the geological evolution of the region. Previously, gravity data from the Norwegian Arctic archipelago of Svalbard comprised an onshore regional gravity database with coarse station spacing of 2–20 km, offshore gravity profiles acquired in some fjords, airborne gravity, and satellite altimetry. The sparse regional point‐based onshore coverage hampered the direct integration of gravity data with seismic profiles acquired onshore Svalbard in the late 1980s and early 1990s. In April 2022, we acquired gravity data at 260 new stations along seven profiles from western to eastern Spitsbergen, with a cumulative length of 329 km. The profiles were acquired directly along selected seismic profiles and provide much closer station spacing (0.5–2 km) compared to the regional inland grid (2–20 km) acquired in the late 1980s (total number of onshore stations: 1,037). Having processed the data, we compared the first‐order density trends of our new data with the legacy regional grid. The new gravity data are consistent with the regional data, imaging a gravity low in the western part of the area underlying a foreland basin and a gravity high in the northwestern part of the area likely associated with a basement high or denser basement. We compare the new and vintage gravity using maps and profiles, linked to the known major tectonic features such as major basinal axes and fault zones, as well as other geophysical data sets including seismics and magnetics. |
| format | Article |
| id | doaj-art-d89b73ee950442a1ad47fb2db4a20175 |
| institution | DOAJ |
| issn | 1525-2027 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geochemistry, Geophysics, Geosystems |
| spelling | doaj-art-d89b73ee950442a1ad47fb2db4a201752025-08-20T02:49:02ZengWileyGeochemistry, Geophysics, Geosystems1525-20272025-01-01261n/an/a10.1029/2024GC011563Crustal Heterogeneity Onshore Central Spitsbergen: Insights From New Gravity and Vintage Geophysical DataKim Senger0Fenna Ammerlaan1Peter Betlem2Marco Brönner3Marie‐Andrée Dumais4Jomar Gellein5Tormod Henningsen6Julian Janocha7Erik P. Johannessen8Jonas Liebsch9Jakob Machleidt10Tereza Mosočiová11Snorre Olaussen12Bo Olofsson13Nil Rodes14Sofia Rylander15Grace E. Shephard16Aleksandra Smyrak‐Sikora17Juan D. Solano‐Acosta18Anna Sterley19Department of Arctic Geology The University Centre in Svalbard Longyearbyen NorwayDepartment of Arctic Geology The University Centre in Svalbard Longyearbyen NorwayDepartment of Arctic Geology The University Centre in Svalbard Longyearbyen NorwayGeological Survey of Norway Trondheim NorwayGeological Survey of Norway Trondheim NorwayGeological Survey of Norway Trondheim NorwayRetired Harstad NorwayDepartment of Arctic Geology The University Centre in Svalbard Longyearbyen NorwaySkolithos Stavanger NorwayDepartment of Arctic Geology The University Centre in Svalbard Longyearbyen NorwayDepartment of Arctic Geology The University Centre in Svalbard Longyearbyen NorwayDepartment of Arctic Geology The University Centre in Svalbard Longyearbyen NorwayDepartment of Arctic Geology The University Centre in Svalbard Longyearbyen NorwayKTH Royal Institute of Technology Stockholm SwedenDepartment of Arctic Geology The University Centre in Svalbard Longyearbyen NorwayDepartment of Arctic Geology The University Centre in Svalbard Longyearbyen NorwayDepartment of Geosciences Centre for Planetary Habitability University of Oslo Oslo NorwayDepartment of Geosciences Norwegian University of Science and Technology Trondheim NorwayDepartment of Arctic Geology The University Centre in Svalbard Longyearbyen NorwayDepartment of Arctic Geology The University Centre in Svalbard Longyearbyen NorwayAbstract Gravity data provide constraints on lateral subsurface density variations and thus provide crucial insights into the geological evolution of the region. Previously, gravity data from the Norwegian Arctic archipelago of Svalbard comprised an onshore regional gravity database with coarse station spacing of 2–20 km, offshore gravity profiles acquired in some fjords, airborne gravity, and satellite altimetry. The sparse regional point‐based onshore coverage hampered the direct integration of gravity data with seismic profiles acquired onshore Svalbard in the late 1980s and early 1990s. In April 2022, we acquired gravity data at 260 new stations along seven profiles from western to eastern Spitsbergen, with a cumulative length of 329 km. The profiles were acquired directly along selected seismic profiles and provide much closer station spacing (0.5–2 km) compared to the regional inland grid (2–20 km) acquired in the late 1980s (total number of onshore stations: 1,037). Having processed the data, we compared the first‐order density trends of our new data with the legacy regional grid. The new gravity data are consistent with the regional data, imaging a gravity low in the western part of the area underlying a foreland basin and a gravity high in the northwestern part of the area likely associated with a basement high or denser basement. We compare the new and vintage gravity using maps and profiles, linked to the known major tectonic features such as major basinal axes and fault zones, as well as other geophysical data sets including seismics and magnetics.https://doi.org/10.1029/2024GC011563 |
| spellingShingle | Kim Senger Fenna Ammerlaan Peter Betlem Marco Brönner Marie‐Andrée Dumais Jomar Gellein Tormod Henningsen Julian Janocha Erik P. Johannessen Jonas Liebsch Jakob Machleidt Tereza Mosočiová Snorre Olaussen Bo Olofsson Nil Rodes Sofia Rylander Grace E. Shephard Aleksandra Smyrak‐Sikora Juan D. Solano‐Acosta Anna Sterley Crustal Heterogeneity Onshore Central Spitsbergen: Insights From New Gravity and Vintage Geophysical Data Geochemistry, Geophysics, Geosystems |
| title | Crustal Heterogeneity Onshore Central Spitsbergen: Insights From New Gravity and Vintage Geophysical Data |
| title_full | Crustal Heterogeneity Onshore Central Spitsbergen: Insights From New Gravity and Vintage Geophysical Data |
| title_fullStr | Crustal Heterogeneity Onshore Central Spitsbergen: Insights From New Gravity and Vintage Geophysical Data |
| title_full_unstemmed | Crustal Heterogeneity Onshore Central Spitsbergen: Insights From New Gravity and Vintage Geophysical Data |
| title_short | Crustal Heterogeneity Onshore Central Spitsbergen: Insights From New Gravity and Vintage Geophysical Data |
| title_sort | crustal heterogeneity onshore central spitsbergen insights from new gravity and vintage geophysical data |
| url | https://doi.org/10.1029/2024GC011563 |
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