气候变化领域集成服务门户(CCPortal): A new approach to thermal history modelling with detrital low temperature thermochronological data

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DOI	10.1016/j.epsl.2019.115872
	A new approach to thermal history modelling with detrital low temperature thermochronological data
	Gallagher K.; Parra M.
发表日期	2020
ISSN	0012821X
卷号	529
英文摘要	We present an inverse modelling strategy to infer thermal history information from detrital low temperature thermochronological data from modern sediment sampling the outlet of a single catchment. As presented, the method relies on the assumption that the geological timescale thermal history was the same across the catchment. The detrital sample is assumed to represent a mixture of grains originating from a potentially unknown sampling of the present elevation range in the catchment. The approach also implements a method to infer a function describing the topographic sampling represented in the detrital sample. In practice, this may reflect variations in erosion with elevation but also lithological differences in the catchment (fertility) and the nature of erosion/transport processes in the catchment. A combination of detrital and in-situ bedrock data are recommended to improve the resolution of the topographic sampling function. We demonstrate the application of the approach to a set of fission track data from the Fundación catchment in the Sierra Nevada de Santa Marta in northern Colombia. The inferred thermal history suggest a period of rapid cooling initiated around 50-30 Ma, followed by slower cooling to the present day, consistent with the regional geological history. The topographic sampling function estimates suggest that the hypsometric distribution is not appropriate in terms of the contributions from different elevations to the detrital sample. Rather, the data imply a higher proportion of sampling from lower elevations close to the location of the outlet where the detrital sample was collected. © 2019 Elsevier B.V.
关键词	detrital thermochronology inversion thermal history
英文关键词	Erosion; Fission reactions; Inverse problems; Lithology; Runoff; Temperature; Detrital thermochronology; Geological history; Inverse modelling; inversion; Low temperatures; Sampling functions; Sediment sampling; Thermal history; Catchments; catchment; depositional environment; detrital deposit; geological record; low temperature; paleoenvironment; sediment transport; thermochronology; timescale; Colombia
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202591
作者单位	Géosciences Rennes/OSUR, University of Rennes, Rennes, Rennes, 35042, France; Institute of Energy and Environment, University of São Paulo, Av. Prof. Luciano Gualberto 1289, Cidade Universitária, Sao Paulo, SP 05508-010, Brazil
推荐引用方式 GB/T 7714	Gallagher K.,Parra M.. A new approach to thermal history modelling with detrital low temperature thermochronological data[J],2020,529.
APA	Gallagher K.,&Parra M..(2020).A new approach to thermal history modelling with detrital low temperature thermochronological data.Earth and Planetary Science Letters,529.
MLA	Gallagher K.,et al."A new approach to thermal history modelling with detrital low temperature thermochronological data".Earth and Planetary Science Letters 529(2020).