DOI: 10.1016/j.epsl.2020.116593
论文题名: Paleogene initiation of the Western Branch of the East African Rift: The uplift history of the Rwenzori Mountains, Western Uganda
作者: Jess S. ; Koehn D. ; Fox M. ; Enkelmann E. ; Sachau T. ; Aanyu K.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 552 语种: 英语
中文关键词: East African Rift
; rifting
; river profile
; thermochronology
; uplift
; Western Branch
英文关键词: Stratigraphy
; Tectonics
; Temperature
; Topography
; East African Rift
; Geological history
; Low temperatures
; Tangible evidence
; Tectonic evolution
; Tectonic history
; Thermal history
; Thermochronology
; Geologic models
; Paleogene
; rifting
; stratigraphy
; tectonic evolution
; thermochronology
; topography
; uplift
; East African Rift
; Rwenzori Mountains
; Uganda
英文摘要: The two branches of the East African Rift System (EARS) are believed to have initiated diachronously. However, a growing body of work continues to suggest the onset of rifting in the Western Branch occurred in the Paleogene, coeval to the Eastern Branch. Due to a lack of pre-Miocene stratigraphy, attempts to resolve the geological history of the Western Branch must study the uplift and erosional histories of the modern rift topography. In this study, the rock uplift history of the Rwenzori Mountains, Western Uganda, is resolved to better our understanding of the tectonic history of the Western Branch of the EAR. Through the application of low-temperature thermochronology, χ-mapping and the modelling of river profiles, we show that rock uplift of the Rwenzori dates back to the Oligocene, with thermal history models suggesting uplift induced exhumation may date back as far as the Eocene. This provides tangible evidence that extension began in the region in the Paleogene, coeval with the Eastern Branch, and not the late Neogene. These results have broad implications for the tectonic evolution of the entire East African Rift System and suggest our current understanding of the region's rift history remains incomplete. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165054
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: University of Calgary, Department of Geoscience, Calgary, AB T2N 1N4, Canada; Geo-Zentrum Nordbayern, University Erlangen-Nuremberg, Erlangen, Germany; Department of Earth Sciences, University College London, London, United Kingdom; Department of Geosciences, Eberhard Karls University Tübingen, Tübingen, Germany; Department of Geology and Petroleum Studies, College of Natural Sciences, Makerere University, P.O. Box 7062, Kampala, Uganda
Recommended Citation:
Jess S.,Koehn D.,Fox M.,et al. Paleogene initiation of the Western Branch of the East African Rift: The uplift history of the Rwenzori Mountains, Western Uganda[J]. Earth and Planetary Science Letters,2020-01-01,552