Geochemistry of REE, Zr and Hf in a wide range of pH and water composition: The Nevado del Ruiz volcano-hydrothermal system (Colombia)

Inguaggiato, Claudio; Censi, P.; Zuddas, Paola; Londoño, John Makario; Chacón, Zoraida; Alzate, Diego; Brusca, L.; D’Alessandro, W.

doi:10.1016/j.chemgeo.2015.09.025

Cited by 51 publications

(32 citation statements)

References 39 publications

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“…These hyperacidic values decrease from the upper to the lower pools, the lowest pH value measured in both field missions was −1.7 (±0.1) (Table S-1). Hyperacidic values have been reported as well for several volcanic crater lakes and hot springs, among them the Kawah Ijen crater lake in Indonesia (pH ∼ 0.3), 16 the Poas crater in Costa Rica (pH ∼ −0.89), 17,18 the Ebeco Volcano in Kuril Islands (pH ∼ 0.2) 19 the Copahue in Argentina (pH ∼ 0.2), 20−22 the Ruapehu in New Zealand (pH ∼ 0.6), 23 the Nevado del Ruiz, Colombia (pH ∼ 1), 24 and the Santa Ana Volcano, El Salvador (pH ∼ 0.5). 25 Concerning acid mine effluents, hyper-acidic to acidic pH values (0.9–3) have been measured in Rio Tinto in Spain, 26 while 27 reporting a bizarre much lower value of pH, −3.6, from the Richmond Mine of the Iron Mt in California.…”

Section: Resultsmentioning

confidence: 99%

A Polyextreme Hydrothermal System Controlled by Iron: The Case of Dallol at the Afar Triangle

Kotopoulou

Huertas

García‐Ruiz

et al. 2018

ACS Earth Space Chem.

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One of the latest volcanic features of the Erta Ale range at the Afar Triangle (NE Ethiopia) has created a polyextreme hydrothermal system located at the Danakil depression on top of a protovolcano known as the dome of Dallol. The interaction of the underlying basaltic magma with the evaporitic salts of the Danakil depression has generated a unique, high-temperature (108 °C), hypersaline (NaCl supersaturated), hyperacidic (pH values from 0.1 to −1.7), oxygen-free hydrothermal site containing up to 150 g/L of iron. We find that the colorful brine pools and mineral patterns of Dallol derive from the slow oxygen diffusion and progressive oxidation of the dissolved ferrous iron, the iron-chlorine/-sulfate complexation, and the evaporation. These inorganic processes induce the precipitation of nanoscale jarosite-group minerals and iron(III)-oxyhydroxides over a vast deposition of halite displaying complex architectures. Our results suggest that life, if present under such conditions, does not play a dominant role in the geochemical cycling and mineral precipitation at Dallol as opposed to other hydrothermal sites. Dallol, a hydrothermal system controlled by iron, is a present-day laboratory for studying the precipitation and progressive oxidation of iron minerals, relevant for geochemical processes occurring at early Earth and Martian environments.

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Section: Resultsmentioning

confidence: 99%

A Polyextreme Hydrothermal System Controlled by Iron: The Case of Dallol at the Afar Triangle

Kotopoulou

Huertas

García‐Ruiz

et al. 2018

ACS Earth Space Chem.

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“…3. Concentrations of the total dissolved REE versus pH for waters from Guiyang fallout events, the world's large rivers and volcanic hydrothermal systems (Inguaggiato et al, 2015). Fig.…”

Section: Discussionmentioning

confidence: 99%

Rare earth elements concentrations and speciation in rainwater from Guiyang, an acid rain impacted zone of Southwest China

et al. 2016

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Rare earth elements (REEs) and major ions were determined in rainwater samples collected from Guiyang in the acid rain impacted zone of Southwest China. The concentrations of total dissolved and acid-soluble REEs in rainwater are higher than those of most of the world's cities as well as the local surface water. The dissolved REE concentrations are negatively correlated to pH in rainwater. This is consistent with acidification of rainwater resulting in increasing REE concentrations. Speciation calculations using the PHREEQC-Model predict that the free REE metal ion (i.e., Ln 3+), sulfate (LnSO 4 +), oxalate (LnOx + and LnOx 2-) and fluoride (LnF 2+) complexes were relatively important forms of dissolved REE. Although the contribution to rainwater acidity of oxalic acid is much lower than that of sulfuric acid, the proportion of REE-oxalate complexes is not lower than that of REE-sulfate complexes in rain waters. The rainwater is enriched in the middle REEs (MREE) compared to both the light REEs (LREE) and heavy REEs (HREE). REE-phosphate complexes, phosphatic minerals and a Fe-Mn-oxyhydroxide coating are more likely controls on the development of MREE enrichment in the rainwater. Complexation of sulfate and REE played little role in the development of MREE enrichment, even though sulfate is the most important anion in acidic rainwater. In the shale-normalized REE pattern plot, La showed a clear positive anomaly. La might have two main anthropogenic sources in rainwater. One of the important sources could be automobile emission; another main source of excess La in rainwater could be the REE fertilizer that has been widely used in the agriculture of China for approximately 30 years.

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“…Several studies demonstrated the ability of the REE to provide insights about water-rock interactions processes [Bau, 1996;Wood, 2003;Censi et al, 2007bCensi et al, , 2014Biddau et al, 2009;Inguaggiato et al, 2015;Varekamp, 2015]. The distribution of REE, Zr and Hf in waters is ruled by metal ion-complexation, precipitation and/or dissolution of solid phases and adsorption onto the mineral surfaces [Wood, 2003;Bau and Koschinsky, 2006;Censi et al, 2014;Inguaggiato et al, 2015].…”

Section: Introductionmentioning

confidence: 99%

Geochemistry of Zr, Hf, and REE in a wide spectrum of Eh and water composition: The case of Dead Sea Fault system (Israel)

Censi

Raso

Yechieli

et al. 2017

Geochem Geophys Geosyst

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Along the Jordan Valley‐Dead Sea Fault area several natural waters in springs, wells, and catchments occur. The chemical‐physical characters of the studied waters allowed for the first time the investigation of the Zr and Hf geochemical behavior, apart from REE, extended to a wide range of Eh, temperature, salinity, and pH conditions. The results of this study indicate that the dissolved Zr and Hf distribution in natural waters is strongly influenced by redox conditions since these in turn drive the deposition of Fe‐oxyhydroxides or pyrite. In oxidizing waters saturated or oversaturated in Fe‐oxyhydroxides (Group 1), superchondritic Zr/Hf values are measured. On the contrary, in waters where Eh < 0 values occur (Group 2), chondritic Zr/Hf values are found. Superchondritic Zr/Hf values are produced by the preferential Hf scavenging onto Fe‐oxyhydroxides that is inhibited under reducing conditions consistent with the water oversaturation relative to pyrite. Redox conditions also influence the amplitude of Ce and Eu anomalies. Oxidized Group‐1 waters show negative Ce anomalies related to the oxidative Ce scavenging as CeO2 onto Fe‐oxyhydroxide. Reduced Group‐2 waters show positive Eu anomaly values consistent with the larger Eu2+ concentration relative to Eu3+ in these waters suggested by model calculations. The higher stability of Eu2+ with respect to its trivalent neighbors along the REE series can explain the above mentioned positive Eu anomaly values. The middle‐REE enrichment observed in shale‐normalized REE patterns of studied waters can be ascribed to carbonate and/or gypsum dissolution.

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Geochemistry of REE, Zr and Hf in a wide range of pH and water composition: The Nevado del Ruiz volcano-hydrothermal system (Colombia)

Cited by 51 publications

References 39 publications

A Polyextreme Hydrothermal System Controlled by Iron: The Case of Dallol at the Afar Triangle

A Polyextreme Hydrothermal System Controlled by Iron: The Case of Dallol at the Afar Triangle

Rare earth elements concentrations and speciation in rainwater from Guiyang, an acid rain impacted zone of Southwest China

Geochemistry of Zr, Hf, and REE in a wide spectrum of Eh and water composition: The case of Dead Sea Fault system (Israel)

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