Stratigraphic sequence, elemental concentrations and heavy metal pollution in Holocene sediments from the Tinto-Odiel Estuary, southwestern Spain

Muñoz, Francisco Ruíz; Montero, María Luz González-Regalado; Borrego, J.; González, Juan Antonio Morales; Pendón, José Gabriel; Muñoz, Juan Manuel

doi:10.1007/s002540050278

Cited by 77 publications

(37 citation statements)

References 9 publications

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“…Pyrite is the main metallic mineral, although sphalerite, galena, cha1copyrite and arsenopyrite are also found in lower quantities. An intense mining activity in this province, which goes back to the Third millennium B. C. (van Geen et al 1997;Nocete et al 2005;Ruiz et al 1998), is related to the exploitation of S-Gu-Pb-Zn from the sulfide ore bodies and, to a lesser extent, to Ag-Au (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

“…This mine-related contamination also reaches the waters of the Tinto and Odiel fluvial systems, with low pH values and large volumes of sulfates, metals and metalloids (Cimovas et al 2007(Cimovas et al , 2008Femimdez Remolar et al 2005;Hudson-Edwards et al 1999;Simchez Espaii a et al 2005Sarmiento et al 2009). Finally, a significant amount of metal is transferred to the sediments of the Tinto-Odiel estuary (van Geen et al 1997;Ruiz et al 1998).…”

Section: Introductionmentioning

confidence: 99%

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A Geochemical and Geophysical Characterization of Sulfide Mine Ponds at the Iberian Pyrite Belt (Spain)

Crespo

Martín-Velázquez

Gómez-Ortíz

et al. 2010

Water Air Soil Pollut

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Geochemical and Geophysical Characterization of Sulfide Mine Ponds at the Iberian Pyrite Belt (Spain)

Crespo

Martín-Velázquez

Gómez-Ortíz

et al. 2010

Water Air Soil Pollut

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“…The clustering method was the Ward's method, with a former elaboration of the agglomeration distance plot to decide the adequate distance Analytical error (lg/g) 1 0.5 2 0.5 MS medium sand, FS fine sand, VFS very fine sand. Background from Ruiz et al (1998) for the division between clusters. A rescaled distance of five units was used to separate the different clusters (Fig.…”

Section: Statistical Proceduresmentioning

confidence: 99%

“…The factor 1.5 is used because of the possible variations of the background data due to lithogenic effects. This regional background was obtained for the different heavy metals and sediment grain sizes by Ruiz et al (1998) in Holocene ([5,000 cal year BP), unpolluted marine sediments of the Tinto-Odiel estuary (Table 1).…”

Section: Determination Of Geoaccumulation Index: Pollution Assessmentmentioning

confidence: 99%

“…In all cases, the sediment grain size plays an important role in controlling the distribution of these metals (Gao and Li 2012). In these investigations, it is important to use a previous background obtained from unpolluted sediments collected in sediment cores (Ruiz et al 1998) or to characterize a regional or local background from surface samples ) in order to delimitate the extent of pollution and to assess the contamination levels.…”

Section: Introductionmentioning

confidence: 99%

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Distribution of heavy metals and pollution pathways in a shallow marine shelf: assessment for a future management

Muñoz

Montero

Muñoz

et al. 2014

Int. J. Environ. Sci. Technol.

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The spatial distribution and geoaccumulation indices of four heavy metals were investigated in very shallow marine sediments of southwestern Spain. Surface sediments were collected from 43 sites with water depth ranging from 3 to 20 m. High to very high pollution levels (I geo [ 4 for zinc, lead and copper) were detected near the end of the Huelva bank, whereas chromium shows a more hazardous distribution in the southwestern Spanish littoral. Low to moderate heavy metal contents (mainly zinc and lead) were also observed in other two areas at different water depths (Isla Cristina-Piedras River: 10-18 m water depth; Mazagón-Matalascañas: \10 m water depth), whereas unpolluted to moderately polluted sediments were detected in the very shallow zones (\8 m water depth) located between the mouths of the Guadiana and the Piedras Rivers. A regional scenario indicates a strong pollution of the adjacent marine areas by polluted inputs derived from the TintoOdiel rivers, with a partial transport of heavy metals by W-E littoral currents even 40 km eastward. The Guadiana River is an additional source of zinc-lead contamination near the Spanish-Portuguese border, mainly at water depths up to 10 m. All these rivers are affected by acid mine drainage processes, derived from millennial mining activities. This pollution affects the sediment quality even 40 km eastward.

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Integrating Multi‐element Geochemical and Magnetic Survey at Ancient Sagalassos (Southwest Turkey): Anthropogenic Versus Natural Anomalies

Dirix

Muchez

Degryse

et al. 2013

Archaeological Prospection

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Several studies in the field of archaeological prospection have suggested that multi-element soil geochemical survey holds potential as an archaeological survey method, complementing more common techniques such as magnetometry and fieldwalking. Despite this, only limited research regarding this topic has been carried out. In this study, a geochemical survey was conducted in the Eastern Suburbium of the Roman to Byzantine city of Sagalassos, with the aim of investigating the possibilities and limitations of the technique in facilitating the interpretation of magnetic survey data. To explore the multivariate patterns present within the chemical dataset, the data were statistically analysed using a contiguity-constrained spatial clustering algorithm. The resulting spatial clusters revealed that an area characterized by high-frequency magnetic anomalies was spatially associated with a chemical cluster rich in Cu, K, P, Pb and Zn. This is interpreted as resulting from the accumulation and decomposition of occupational debris. Enhancements of Al, As and Ba helped to interpret an area with a low magnetic signal as a region where limestone bedrock was located close to the soil surface. Finally, two zones of enhanced magnetization were shown to spatially overlap with two clusters of soils containing elevated levels of Co, Cr, Mg, Mn, Ni and (Fe) and Ti, V and (Fe), respectively, indicating the presence of two different types of mafic to ultramafic ophiolitic bedrock near the soil surface. This study confirms that multi-element geochemistry has potential as a survey technique, because it offers direct information on soil bedrock or ancient human disturbance, thereby adding an extra dimension to the interpretation of geophysical survey data. It is shown that soil chemical data are particularly valuable for distinguishing anthropogenic and natural impacts creating geophysical anomalies. Contiguityconstrained clustering was found to be a promising data analysis technique for multivariate geochemical survey data.

show abstract

Stratigraphic sequence, elemental concentrations and heavy metal pollution in Holocene sediments from the Tinto-Odiel Estuary, southwestern Spain

Cited by 77 publications

References 9 publications

A Geochemical and Geophysical Characterization of Sulfide Mine Ponds at the Iberian Pyrite Belt (Spain)

A Geochemical and Geophysical Characterization of Sulfide Mine Ponds at the Iberian Pyrite Belt (Spain)

Distribution of heavy metals and pollution pathways in a shallow marine shelf: assessment for a future management

Integrating Multi‐element Geochemical and Magnetic Survey at Ancient Sagalassos (Southwest Turkey): Anthropogenic Versus Natural Anomalies

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