Dating young Holocene coastal sediments in tropical regions: Use of fallout 239,240Pu as alternative chronostratigraphic marker

Corcho-Alvarado, J.A.; Díaz-Asencio, Misael; Froidevaux, Pascal; Bochud, François; Alonso-Hernández, Carlos; Sanchez-Cabeza, Joan-Albert

doi:10.1016/j.quageo.2014.02.001

Cited by 28 publications

(25 citation statements)

References 37 publications

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“…4 Seafloor sediments are therefore the ultimate sink of Pu entering the marine environment, and preserve Pu deposition history, from which valuable information of impact of human activities on the marine environment and its changes over time can be deduced. With the well constrained release history of the global fallout Pu from the NWTs, which began in the late 1940s and had a distinct deposition maximum in 1963 (UNSCEAR, 2000), 5 undisturbed sediment recording these two events can be identified and thus used for dating purpose (Corcho-Alvarado et al, 2014). 6 With the recent rapid development in analytical procedures and mass spectrometric measurements (Qiao et al, 2009), 7-8 239+240 Pu has been suggested as a chronostratigraphic marker for modern sediments dating in both freshwater bodies (e.g.…”

Section: Introductionintrductionmentioning

confidence: 99%

“…6 With the recent rapid development in analytical procedures and mass spectrometric measurements (Qiao et al, 2009), 7-8 239+240 Pu has been suggested as a chronostratigraphic marker for modern sediments dating in both freshwater bodies (e.g. lakes and river estuaries) (Ketterer et al, 2004;Wu et al, 2010;Zheng et al, 2008) 9-12 and coastal areas (Corcho-Alvarado et al, 2014;Hancock et al, 2011), 6,13 and shown some advantages to the conventional 137 Cs method, such as more precise determination especially in marine sediments (Hancock et al, 2011) 13 and additional chronometers associated with changes in 240 Pu/ 239 Pu atomic ratios for Pu fallout during the 1950s and 1960s (Koide et al, 1985) 14 as well as fallout from the 1986 Chernobyl accident in some European areas (Ketterer et al, 2004).…”

Section: Introductionintrductionmentioning

confidence: 99%

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Sedimentary record of plutonium in the North Yellow Sea and the response to catchment environmental changes of inflow rivers

Pan

Gao

et al. 2018

Chemosphere

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Plutonium (Pu) isotopes were first determined in surface and core sediment samples collected from the northern North Yellow Sea (NYS) to elucidate their source terms and deposition process as well as the response to catchment environmental changes of inflow rivers. Pu/Pu atom ratios in all sediments showed the typical global fallout value of ∼0.18 without any influences from the nuclear weapons tests conducted recently in the North Korea or early in the Pacific Proving Ground. The large variation of Pu activities (0.022-0.515 mBq/g) observed in surface sediments should be mainly attributed to the re-suspension and transportation of fine sediments influenced by the Liaonan Costal Current. Based on the twoPu depth profiles with easily observed onset fallout levels (1952) and global fallout peaks (1963), Pu served as a valid time mark in the coastal sedimentary system. Riverine input Pu contributed only 15-27% to the total global fallout inventory (92.5-108.8 Bq/m) in the northern NYS, much lower than that in the Yangtze River estuary (77-80%), indicating a better soil conservation in the northeast China due to higher forest coverage compared to the Yangtze River's drainage basin. The increase of riverine input Pu after 1980s reflected the more intense soil erosion degree caused by the land use and cover change due to the increment of human activities in the northeast China at the same period. Our results demonstrated that plutonium is a good indicator for studying sedimentary process and its response to the environment in the coastal area.

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Section: Introductionintrductionmentioning

confidence: 99%

Section: Introductionintrductionmentioning

confidence: 99%

Sedimentary record of plutonium in the North Yellow Sea and the response to catchment environmental changes of inflow rivers

Pan

Gao

et al. 2018

Chemosphere

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“…This result suggests that the area was not highly affected by sediment focusing or erosion. More details of the geochronology of this core can be found in Corcho-Alvarado et al (2014).…”

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Historical trends of organochlorine pesticides in a sediment core from the Gulf of Batabanó, Cuba

et al. 2015

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“…Dating based on the short-lived isotope 210 Pb (Appleby and Oldfield, 1983) and anthropogenic fallout radionuclides 137 Cs, 239,240 Pu and 241 Am (e.g. Corcho-Alvarado et al, 2014) is relevant for sediments of the last 100-150 years at best, and require a significant fraction of fine-grained particles in the sediment bulk (Appleby and Oldfield, 1983). Age determination of marine sediments deposited during intermediate historical times (between about 600 and 100 years BP) remains a challenging task.…”

Section: Introductionmentioning

confidence: 99%

Spatially explicit bathymetric reconstruction from lead line depth soundings of the late 17th century

Poirier

Sauzeau

Chaumillon

et al. 2020

Estuarine, Coastal and Shelf Science

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Sequences of repeated bathymetric surveys through time have been successfully used to document the morphodynamical evolution of coastal environments within historical times. Most chronobathymetric sequences have a restricted temporal coverage, as surveys rarely date back earlier than the 19th century. The aim of this study is to explore the potential of older lead line depth measurements as a reliable source of bathymetric data. A late 17th century marine chart of the Pertuis Charentais (France) was used as a test case. High-resolution scans of the chart sheets were retrieved from a public online digital library. A rare manuscript contemporary to the chart was obtained from the French National Archives, in order to constrain the methodology used to acquire depth measurements. A spatially explicit bathymetry covering 1500 km 2 was reconstructed from the interpolation of about 4600 georeferenced depth soundings. Vertical error was estimated by assuming the equivalence of depth values between the late 17th century and the recent (1960) bathymetries above subtidal rocks outcropping on the seafloor. Documentary data indicated that the chart author did not acquire depth measurements on purpose but instead collected data taken by local sailors and coasting pilots over an unknown period of time, probably ranging from a few years to a few decades. The large vertical error estimated to ± 4.5 m mainly resulted from the lack of tide correction. Bathymetric difference maps could not be computed, but despite these weaknesses, the large-scale sediment infilling of the area and the long-term evolution of an estuarine sandbank could be documented, in agreement with previous works. Beyond its utility for local studies, this article provides insights into the processing of depth measurements acquired long before modern hydrography surveys, and demonstrates that such old marine charts deserve consideration, provided conditions are met for their critical assessment.

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Dating young Holocene coastal sediments in tropical regions: Use of fallout 239,240Pu as alternative chronostratigraphic marker

Cited by 28 publications

References 37 publications

Sedimentary record of plutonium in the North Yellow Sea and the response to catchment environmental changes of inflow rivers

Sedimentary record of plutonium in the North Yellow Sea and the response to catchment environmental changes of inflow rivers

Historical trends of organochlorine pesticides in a sediment core from the Gulf of Batabanó, Cuba

Spatially explicit bathymetric reconstruction from lead line depth soundings of the late 17th century

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