Rapid Uplift, yet Slow Denudation of the Suckling‐Dayman Metamorphic Core Complex in Tropical Papua New Guinea
Abstract A linear relationship between rates of physical erosion and chemical weathering is apparent in slowly eroding landscapes. Whether the relationship remains linear in rapidly eroding landscapes is less clear. Field‐based research into this relationship between erosion and weathering rates has...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2024-10-01
|
| Series: | Geophysical Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2023GL106487 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849716839281590272 |
|---|---|
| author | J. E. Österle K. P. Norton C. E. Lukens T. A. Little M. Mizera S. M. Webber K. Wilcken |
| author_facet | J. E. Österle K. P. Norton C. E. Lukens T. A. Little M. Mizera S. M. Webber K. Wilcken |
| author_sort | J. E. Österle |
| collection | DOAJ |
| description | Abstract A linear relationship between rates of physical erosion and chemical weathering is apparent in slowly eroding landscapes. Whether the relationship remains linear in rapidly eroding landscapes is less clear. Field‐based research into this relationship between erosion and weathering rates has largely been conducted in temperate climates with granitic bedrock. In tropical settings, the contribution of chemical mass loss to total denudation may approach, or even exceed, that of erosion. We report 10Be‐in‐quartz cosmogenic radionuclide and soil chemistry data from the Suckling‐Dayman Metamorphic Core Complex (SDMCC) in Papua New Guinea. Despite being exhumed at cm‐per‐year rates, its lower‐plate domed and striated morphology suggests minimal denudation, which is confirmed by our 10Be‐in‐quartz data (0.02–0.18 mm/yr). We suggest that rolling hinge‐style back‐rotation of the SDMCC's lower plate and the combination of a tropical climate and highly weatherable metabasalt bedrock have played a fundamental role in preserving the tectonic topography of this remarkable metamorphic core complex. |
| format | Article |
| id | doaj-art-9bf7dc7e47d74b829353be3a705ff7e3 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-9bf7dc7e47d74b829353be3a705ff7e32025-08-20T03:12:52ZengWileyGeophysical Research Letters0094-82761944-80072024-10-015119n/an/a10.1029/2023GL106487Rapid Uplift, yet Slow Denudation of the Suckling‐Dayman Metamorphic Core Complex in Tropical Papua New GuineaJ. E. Österle0K. P. Norton1C. E. Lukens2T. A. Little3M. Mizera4S. M. Webber5K. Wilcken6Victoria University of Wellington School of Geography Environment and Earth Sciences Wellington New ZealandVictoria University of Wellington School of Geography Environment and Earth Sciences Wellington New ZealandVictoria University of Wellington School of Geography Environment and Earth Sciences Wellington New ZealandVictoria University of Wellington School of Geography Environment and Earth Sciences Wellington New ZealandVictoria University of Wellington School of Geography Environment and Earth Sciences Wellington New ZealandVictoria University of Wellington School of Geography Environment and Earth Sciences Wellington New ZealandCentre for Accelerator Science Australian Nuclear Science and Technology Organisation Lucas Heights NSW AustraliaAbstract A linear relationship between rates of physical erosion and chemical weathering is apparent in slowly eroding landscapes. Whether the relationship remains linear in rapidly eroding landscapes is less clear. Field‐based research into this relationship between erosion and weathering rates has largely been conducted in temperate climates with granitic bedrock. In tropical settings, the contribution of chemical mass loss to total denudation may approach, or even exceed, that of erosion. We report 10Be‐in‐quartz cosmogenic radionuclide and soil chemistry data from the Suckling‐Dayman Metamorphic Core Complex (SDMCC) in Papua New Guinea. Despite being exhumed at cm‐per‐year rates, its lower‐plate domed and striated morphology suggests minimal denudation, which is confirmed by our 10Be‐in‐quartz data (0.02–0.18 mm/yr). We suggest that rolling hinge‐style back‐rotation of the SDMCC's lower plate and the combination of a tropical climate and highly weatherable metabasalt bedrock have played a fundamental role in preserving the tectonic topography of this remarkable metamorphic core complex.https://doi.org/10.1029/2023GL106487landscape evolutionerosionweatheringcosmogenic nuclidessoil productionmetabasalt |
| spellingShingle | J. E. Österle K. P. Norton C. E. Lukens T. A. Little M. Mizera S. M. Webber K. Wilcken Rapid Uplift, yet Slow Denudation of the Suckling‐Dayman Metamorphic Core Complex in Tropical Papua New Guinea Geophysical Research Letters landscape evolution erosion weathering cosmogenic nuclides soil production metabasalt |
| title | Rapid Uplift, yet Slow Denudation of the Suckling‐Dayman Metamorphic Core Complex in Tropical Papua New Guinea |
| title_full | Rapid Uplift, yet Slow Denudation of the Suckling‐Dayman Metamorphic Core Complex in Tropical Papua New Guinea |
| title_fullStr | Rapid Uplift, yet Slow Denudation of the Suckling‐Dayman Metamorphic Core Complex in Tropical Papua New Guinea |
| title_full_unstemmed | Rapid Uplift, yet Slow Denudation of the Suckling‐Dayman Metamorphic Core Complex in Tropical Papua New Guinea |
| title_short | Rapid Uplift, yet Slow Denudation of the Suckling‐Dayman Metamorphic Core Complex in Tropical Papua New Guinea |
| title_sort | rapid uplift yet slow denudation of the suckling dayman metamorphic core complex in tropical papua new guinea |
| topic | landscape evolution erosion weathering cosmogenic nuclides soil production metabasalt |
| url | https://doi.org/10.1029/2023GL106487 |
| work_keys_str_mv | AT jeosterle rapidupliftyetslowdenudationofthesucklingdaymanmetamorphiccorecomplexintropicalpapuanewguinea AT kpnorton rapidupliftyetslowdenudationofthesucklingdaymanmetamorphiccorecomplexintropicalpapuanewguinea AT celukens rapidupliftyetslowdenudationofthesucklingdaymanmetamorphiccorecomplexintropicalpapuanewguinea AT talittle rapidupliftyetslowdenudationofthesucklingdaymanmetamorphiccorecomplexintropicalpapuanewguinea AT mmizera rapidupliftyetslowdenudationofthesucklingdaymanmetamorphiccorecomplexintropicalpapuanewguinea AT smwebber rapidupliftyetslowdenudationofthesucklingdaymanmetamorphiccorecomplexintropicalpapuanewguinea AT kwilcken rapidupliftyetslowdenudationofthesucklingdaymanmetamorphiccorecomplexintropicalpapuanewguinea |