Seismic stratigraphy of Late Quaternary sediments of western Mersin Bay shelf, (NE Mediterranean Sea)

Okyar, Mahmut; Ergi̇n, Mustafa; Evans, Graham

doi:10.1016/j.margeo.2005.06.024

Cited by 18 publications

(10 citation statements)

References 15 publications

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“…Even the good responses of the stratigraphic sequences, sedimentary structures and morphology produced by the high-resolution seismic reflection surveying instruments111213, it is difficult to survey the vast areas of the submerged deltas in the world, so they remain the least known part of the global deltaic systems.…”

mentioning

confidence: 99%

Detection of the Three Gorges Dam influence on the Changjiang (Yangtze River) submerged delta

Dai

Liu

Wen

et al. 2014

Sci Rep

214

146

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While most large river-deltas in the world are facing the risk of subsidence and erosion in the Anthropocene, it is suspected that the Changjiang submerged delta (CSD) could be subjected to the impacts of the world's largest dam, the Three Gorges Dam (TGD). Here we firstly indicate that the CSD went through high accumulation (1958–1978); slight accumulation (1978–1997), slight erosion (1997–2002); and high accumulation (2002–2009), despite the 70% reduction of the sediment load from upstream since the operation of the TGD in 2003. Meanwhile, at the depocenter of the submerged delta, the accumulation maintained a high rate of 10 cm/yr during 1958–2009. This suggests on a longer term, the distal sediment source from the upstream had little effect on the CSD. Within this time frame the changes in the partition of sediment load among the branching channels of the Changjiang Estuary could likely control the shifting of the depocenter of the CSD on a decadal time scale. Episodic extreme floods and storm surges also increased the magnitude of deposition and erosion of the CSD on short-term scales. A re-evaluation of the impacts of TGD on the CSD is urgently needed.

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mentioning

confidence: 99%

Detection of the Three Gorges Dam influence on the Changjiang (Yangtze River) submerged delta

Dai

Liu

Wen

et al. 2014

Sci Rep

214

146

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“…Oz 8,10,15,19,24,27,30,53 and 54 concentrated on column four (1.0 mm-0.5 mm), column five (0.5 mm-0.25 mm) and column six (0.25 mm-0.125 mm) and showed a negative thin skewness. Oz-4, 5,6,11,12,13,14,15,16,18,19,22,23,46,48,49 and 50 showed a bimodal distribution. There might be an entrance of a small river into the coastal sand in the region.…”

Section: Resultsmentioning

confidence: 95%

Use of Multivariate Statistics Methods to Determine Grain Size, Heavy Metal Distribution and Origins of Heavy Metals in Mersin Bay (Eastern Mediterranean) Coastal Sediments

Yalçın¹,

Çevik²,

Karaman³

2013

Asian J. Chem.

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Heavy metal contents in coastal sediments due to natural and anthropogenic processes were handled by various scientific studies. These studies provided important information to identify natural and anthropogenic origins of heavy metals 1-10. There is a large number of literature on biogeochemistry 11 , soil parameters 12 , stratigraphy 13,14 , marine geology and geophysics 15 , the effects of sea water 16 , costal tourism 17 , mediterranean geology 18 , heavy metal ratios in northeastern Mediterranean fish 19 and heavy metals in coastal sand of Mediterranean region 20,21 and the vicinity of our study area. However, the literature contains no scientific study on heavy metal contents

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“…PIPER; AKSU, 1992;SYDOW;ROBERTS, 1994;CORREGGIARI, 2000;EVANS et al, 1995;HERNANDEZ-MOLINA et al, 2000;RIDENTE;TRINCARDI, 2002;JIN et al, 2002;LOFI et al, 2003;BERNÉ et al, 2004;OKYAR et al, 2005;RABINEAU et al, 2005;TEZCAN;OKYAR, 2006;GROSSMAN et al, 2006;LIQUETE et al, 2008;TRIPSANAS;PIPER, 2008).…”

Section: Discussionunclassified

Architecture and stratigraphic framework of shelf sedimentary systems off Rio de Janeiro state, Northern Santos Basin-Brazil

et al. 2010

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A B S T R A C TSeismic analysis of sparker lines of GEOMAR cruises allowed us to address a first stratigraphic scenario for the shallow sedimentary record (~300 msec) of the continental shelf off Rio de Janeiro State, northern Santos basin. Two sets of seismic sequences were identified and interpreted as a succession of depositional sequences induced by repeated glacioeustatic cycles. Depositional sequences composing Set I (SqA-SqC) are dominantly sigmoidal, reflecting periods of increasing accommodation space that favoured the preservation of both aggradational and progradational units; sequences of Set II (Sq1-Sq5) are essentially seaward-thickening stacks of forced-regression wedges, implying periods of declining accommodation space. Comparison between seismic lines and chronostratigraphic data allowed the mapped sequences to be placed within the Plio-Quaternary. Correlations also suggest that most of Set I (SqA and lower portion of SqB) was deposited during the Pliocene (undifferentiated Pliocene), while the upper portion of sequence SqC and sequences of Set II (Sq1-Sq5) have been placed within the Quaternary. Correlation of chronostratigraphic data with δ 18 O isotopic "sea level curves" also supports the hypothesis that sequences Sq1-Sq4 are fourth-order forced-regression sequences that record 100-120 kyr glacioeustatic cycles for the last 440-500 kyr, while sedimentary units labeled Sq5 would represent the transgressive and highstand deposition during the Holocene. R E S U M OA análise sísmica de dados sparker das Operações GEOMAR permitiu a elaboração de um primeiro arcabouço estratigráfico da seção rasa (~300 msec) da plataforma continental do Estado do Rio de Janeiro, norte da bacia de Santos. Dois conjuntos de seqüências sísmicas foram interpretados como seqüências deposicionais induzidas por oscilações glacio-eustáticas. O Conjunto I (SqA-SqC), composto por seqüências dominantemente sigmoidais, reflete condições de geração de espaço de acomodação sedimentar capaz de preservar seus componentes agradacionais-progradacionais; o Conjunto II (Sq1-Sq5), composto principalmente por prismas de regressão forçada, indica diminuição relativa de espaço de acomodação. Dados cronoestratigráficos de poços permitiram posicionar a seção sísmica investigada na janela plio-quaternária: à maior parte do Conjunto I (SqA e parte inferior da SqB) foi atribuída uma idade Plioceno (indiferenciado); à seção estratigráfica que se estende da porção superior da SqC até o Conjunto II foi atribuída uma idade quaternária. A correlação entre a base de dados e curvas globais de variações isotópicas de δ 18 O permitiu ainda sugerir que as seqüências Sq1-Sq4 registram sequências regressivas de quarta ordem (ciclos glacio-eustáticos de cerca de 100-120 ka) durante os últimos 440-500 ka. A sequência Sq5 representaria a deposição holocênica, constituída por depósitos transgressivos e de sistemas de mar alto.

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Seismic stratigraphy of Late Quaternary sediments of western Mersin Bay shelf, (NE Mediterranean Sea)

Cited by 18 publications

References 15 publications

Detection of the Three Gorges Dam influence on the Changjiang (Yangtze River) submerged delta

Detection of the Three Gorges Dam influence on the Changjiang (Yangtze River) submerged delta

Use of Multivariate Statistics Methods to Determine Grain Size, Heavy Metal Distribution and Origins of Heavy Metals in Mersin Bay (Eastern Mediterranean) Coastal Sediments

Architecture and stratigraphic framework of shelf sedimentary systems off Rio de Janeiro state, Northern Santos Basin-Brazil

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