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Long-term cooling h...
Long-term cooling history of the Albertine Rift : new evidence from the western rift shoulder, DR Congo
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Bauer, F. U. (författare)
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Glasmacher, U. A. (författare)
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- Ring, Uwe (författare)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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Grobe, R. W. (författare)
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Mambo, V. S. (författare)
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Starz, M. (författare)
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(creator_code:org_t)
- 2015-02-01
- 2016
- Engelska.
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Ingår i: International journal of earth sciences. - : Springer Science and Business Media LLC. - 1437-3254 .- 1437-3262. ; 105:6, s. 1707-1728
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- To determine the long-term landscape evolution of the Albertine Rift in East Africa, low-temperature thermochronology was applied and the cooling history constrained using thermal history modelling. Acquired results reveal (1) old cooling ages, with predominantly Devonian to Carboniferous apatite fission-track ages, Ordovician to Silurian zircon (U-Th)/He ages and Jurassic to Cretaceous apatite (U-Th-Sm)/He ages; (2) protracted cooling histories of the western rift shoulder with major phases of exhumation in mid-Palaeozoic and Palaeogene to Neogene times; (3) low Palaeozoic and Neogene erosion rates. This indicates a long residence time of the analysed samples in the uppermost crust, with the current landscape surface at a near-surface position for hundreds of million years. Apatite He cooling ages and thermal history models indicate moderate reheating in Jurassic to Cretaceous times. Together with the cooling age distribution, a possible Albertine high with a distinct relief can be inferred that might have been a source area for the Congo Basin.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Nyckelord
- East African Rift System
- Albertine Rift
- Low-temperature thermochronology
- Apatite fission-track
- Thermal history modelling
- Long-term landscape evolution
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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