An effective method to distinguish between artificial and authigenic gypsum in marine sediments

Liu, Chenhui; Jiang, Shao‐Yong; Su, Xinming; Huang, Chi‐Yue; Zhou, Yang; Bian, Xiaopeng; Yang, Tao

doi:10.1016/j.marpetgeo.2019.07.044

Cited by 8 publications

(3 citation statements)

References 54 publications

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“…The presence of this oligo-element in these substrates would have been impacted by several hydrochemical phenomena, particularly by the temperature of this channel over the period from October 2018 to September 2019. Indeed, the relatively hot temperatures of this channel would favor Ca precipitation in the superficial sediments of this aquatic ecosystem, particularly in calcites, dolomites and gypsum [57,58], in addition to its presence in its oxidized forms. This would happen more in HS, RS and FS.…”

Section: Discussionmentioning

confidence: 99%

“…This would happen more in HS, RS and FS. On the other hand, the relatively cold temperatures of this channel during the upwelling seasons of Atlantic Ocean in front of Abidjan district (GCS and SCS) would lead to the solubilization of Ca precipitates, in particular those of calcites and gypsum [58]. Also, the intense decalcification phenomena that take place in this channel due to the acidic nature of some seasonal water inputs (meteorite inputs in RS [59,60] and Comoé River in FS and SCS [32,53]) would contributed to reducing their presence in these sediments [52].…”

Section: Discussionmentioning

confidence: 99%

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Impact of the Climate Change and the Recent Development of an Artificial Tropical Estuary on the Mobility and Distribution of Phosphorus: Case of Vridi Channel (Côte d'Ivoire)

Samuel

Konan

Trokourey

2021

IRJPAC

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This study focused on the effects of the climate change and the recent modification of Vridi channel on the mobility and distribution of phosphorus (P) in its superficial sediments. To best estimate this fact, the annual mobility and distribution of P were followed and compared before and after this development during two different annual periods, marked differently by the climate change effects. The first annual period has covered the period from April 2014 to March 2015 and this channel presented its former hydromorphology, with hydroclimatic conditions very close to that normal of Abidjan district. The second period annual has covered the period from October 2018 to September 2019 and this channel presented its current hydromorphology and, characterized by a rainfall drop and high ambient air temperatures compared to that normal of Abidjan district. A monthly sampling has been done at 5 cm below the surface sediment in this channel during each annual period. The mobility and distribution of P was assessed in the superficial sediments of this channel according two sequential extraction protocols: the modified Van Eck method and the modified Olsen method. Total phosphorus was assessed according AFNOR NF X31-147. The total phosphorus contents and all P fractions contents of these superficial sediments assessed by these two sequential methods and obtained over the period from April 2014 to March 2015 are higher than those determined over the period from October 2018 to September 2019. Thus, the recent development of this estuary, with as a corollary the modification of the physical and chemical characteristics of its superficial sediments, would have had the effect of clearing P towards the Atlantic Ocean and/or accelerating its sedimentation; hence the reduction of eutrophication risk of this aquatic ecosystem.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Impact of the Climate Change and the Recent Development of an Artificial Tropical Estuary on the Mobility and Distribution of Phosphorus: Case of Vridi Channel (Côte d'Ivoire)

Samuel

Konan

Trokourey

2021

IRJPAC

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“…Embora a gipsita possa ser precipitada durante o armazenamento do testemunho ou durante a preparação das amostras (Siesser e Rogers, 1976;Lin et al, 2016b;Liu et al, 2019b), as rosetas e agulhas milimétricas sem feições de retrabalhamento, com algumas inclusões de microfósseis sugerem uma formação in situ para este mineral. Além disso, neste estudo, os cristais de gipsita se encontram em dois intervalos estratigráficos bem definidos, em associação com a pirita, que também indica uma formação autigênica deste mineral.…”

Section: Precipitação De Gipsita (Caso42h2o)unclassified

Mineralogia autigênica em sedimentos quaternários da bacia de Santos: evidências de emanações de metano no Oceano Atlântico Sudoeste

Dantas¹

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Agradeço primeiramente à minha família por sempre me apoiar em minhas escolhas, incentivar e acreditar em mim. Sem o amor e o apoio de vocês, eu nada seria.Ao meu orientador Dr. Luigi Jovane, pela oportunidade, pela confiança e pelo incentivo que foram fundamentais para a construção e conclusão desta dissertação de mestrado.Aos meus amigos e colegas do CORE, cuja convivência, conversas e apoio foram essenciais no decorrer deste trabalho.Aos técnicos do Instituto Oceanográfico (IO-USP) por todo o apoio durante as análises.À Profª Drª. Karen Costa pelas dicas preciosas em relação à bioestratigrafia e ao Dr. Sandro Petró pela grande ajuda na identificação dos foraminíferos.A todos os meus amigos que me incentivaram a entrar no mestrado e que acompanharam de perto esse processo. Um agradecimento especial a

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First geological survey and characterisation of a giant depression in carbonate strata at the Rio Grande Rise (southwestern Atlantic)

Ferraz,

Millo,

Giannini

et al. 2024

Geomorphology

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An effective method to distinguish between artificial and authigenic gypsum in marine sediments

Cited by 8 publications

References 54 publications

Impact of the Climate Change and the Recent Development of an Artificial Tropical Estuary on the Mobility and Distribution of Phosphorus: Case of Vridi Channel (Côte d'Ivoire)

Impact of the Climate Change and the Recent Development of an Artificial Tropical Estuary on the Mobility and Distribution of Phosphorus: Case of Vridi Channel (Côte d'Ivoire)

Mineralogia autigênica em sedimentos quaternários da bacia de Santos: evidências de emanações de metano no Oceano Atlântico Sudoeste

First geological survey and characterisation of a giant depression in carbonate strata at the Rio Grande Rise (southwestern Atlantic)

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