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Detalhes Referência

Tipo
Artigos em Revista

Tipo de Documento
Artigo Completo

Título
Dating recent tidal marsh sediments using windborne giant particles of green petcoke – An example from the southwest coast of Portugal

Participantes na publicação
J. Moreno (Author)
IDL
E. Leorri (Author)
F. Fatela (Author)
Dep. Geologia
IDL
M.C. Freitas (Author)
Dep. Geologia
F. Moreno (Author)
J. Mirão (Author)
L. Dias (Author)
M. Leira (Author)
P. Masqué (Author)
A. Russo (Author)
Dep. Engenharia Geográfica, Geofísica e Energia
IDL
A. Cunha (Author)
M. Inácio (Author)
W.H. Blake (Author)

Resumo
Coastal systems are especially vulnerable to human activities resulting from a range of direct physical modifications of the ecosystems to the biological, chemical, and physical impacts of pollutants. For the most recent decades, these modifications can be accurately tracked by industrial development indicators, providing an exceptional record of historical changes. In return, when such changes are identified in the sedimentological record, they can serve as precise chronological markers. Here, we examined the potential of petcoke particles, a by-product of crude oil refining, as an emergent sediment dating tool. To this end, giant (63–∼200 μm) black spheroidal petcoke particles – present in cores retrieved in the salt marshes of the Sado estuary (SW Portugal) – were used. These anthropogenic particles were counted and identified according to their morphology, structure, and chemical composition, using complementary micro-beam techniques: Scanning Electron Microscope and Energy Dispersive Spectroscopy, and Micro X-Ray Diffraction. The analyses revealed shot-type green petcoke particles containing a set of elements, which are well-known metallic/non-metallic impurities in petcoke. Based on the available historical data on petcoke imports in the port of Setúbal (Sado estuary) and Portugal, their first appearance in sediments can be dated to 1996 ± 2, with maxima in 2006 ± 4. Both the presence and the historical evolution of the use of petcoke in the region were recorded in all sediment cores, with higher particle density in locations aligned with the prevailing winds. The combination of petcoke and 137Cs data provided accretion rates for the 1963–2006 period ranging from 0.1 to 0.3 cm yr−1 (average: 0.2 cm yr−1), while these rates significantly increased from 2006 onwards (avg. rate: 1.1 cm yr−1; range: 0.6–2.1 cm yr−1). The widespread handling of petcoke worldwide leads us to suggest petcoke particles as a reliable chronological marker at local and regional scales, to be used in combination with other dating methods to build more exact sediment chronologies.

Data de Publicação
2023-06

Instituição
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Suporte
Continental Shelf Research

Identificadores da Publicação
ISSN - 0278-4343

Editora
Elsevier BV

Volume
262

Página Inicial
105026

Identificadores do Documento
DOI - https://doi.org/10.1016/j.csr.2023.105026
URL - http://dx.doi.org/10.1016/j.csr.2023.105026

Identificadores de Qualidade
SCIMAGO Q1 (2021) - 0,77 - Geology
SCOPUS Q1 (2021) - 4.2 - Geology


Exportar referência

APA
J. Moreno, E. Leorri, F. Fatela, M.C. Freitas, F. Moreno, J. Mirão, L. Dias, M. Leira, P. Masqué, A. Russo, A. Cunha, M. Inácio, W.H. Blake, (2023). Dating recent tidal marsh sediments using windborne giant particles of green petcoke – An example from the southwest coast of Portugal. Continental Shelf Research, 262, ISSN 0278-4343. eISSN . http://dx.doi.org/10.1016/j.csr.2023.105026

IEEE
J. Moreno, E. Leorri, F. Fatela, M.C. Freitas, F. Moreno, J. Mirão, L. Dias, M. Leira, P. Masqué, A. Russo, A. Cunha, M. Inácio, W.H. Blake, "Dating recent tidal marsh sediments using windborne giant particles of green petcoke – An example from the southwest coast of Portugal" in Continental Shelf Research, vol. 262, 2023. 10.1016/j.csr.2023.105026

BIBTEX
@article{59085, author = {J. Moreno and E. Leorri and F. Fatela and M.C. Freitas and F. Moreno and J. Mirão and L. Dias and M. Leira and P. Masqué and A. Russo and A. Cunha and M. Inácio and W.H. Blake}, title = {Dating recent tidal marsh sediments using windborne giant particles of green petcoke – An example from the southwest coast of Portugal}, journal = {Continental Shelf Research}, year = 2023, volume = 262 }