Rare earth element fractionation and concentration variations along a groundwater flow path within a shallow, basin-fill aquifer, southern Nevada, USA

Johannesson, Karen H.; Farnham, Irene; Guo, Chenguang; Stetzenbach, Klaus J.

doi:10.1016/s0016-7037(99)00184-2

Cited by 126 publications

(60 citation statements)

References 43 publications

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“…5d), but is two orders of magnitude more depleted, with HREE enrichment in the veins (Table 2). The observed HREE enrichment can be due to complexation processes that are common within shallow groundwater systems (Johannesson et al 1999;Johannesson & Hendry 2000). The rather high d…”

Section: Calcite Precipitates In the Baraq Faultmentioning

confidence: 97%

Formation of fault-related calcite precipitates and their implications for dating fault activity in the East Anatolian and Dead Sea fault zones

Nuriel

Rosenbaum

Uysal

et al. 2011

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Fault-related calcite precipitates taken from different segments along the East Anatolian (SE Turkey) and Dead Sea (Israel) fault zones were investigated structurally, geochemically and geochronologically. The results indicate major differences in the nature of calcite precipitates and temporal relationship to faulting. In the Düziçi Fault, calcite-filled veins and hydraulic fractures precipitated co-seismically during three consecutive faulting events. Calcite precipitated in veins at the Har Zefiyya Fault was controlled by near-surface karst processes. Initial opening of the veins occurred prior to about 500 ka and may represent the onset of an east-west contractional deformation. In the Carmel Fault Zone the calcite coating the fault plane precipitated by karst processes, with no evidence of subsequent deformation. Calcite fault gouge from the same site are a mix of host-rock gouge and newly formed authigenic calcite, and their overall geochemistry suggests pervasive fluid-rock interaction in the fault zone. In the Baraq Fault Zone the precipitation of calcite within syntectonic tension gashes and veins occurred prior to 540 ka by the pervasive infiltration of meteoric water into the fault zone. The results demonstrate that geochemical and structural analyses, combined with U-Th geochronology, can shed light on co-seismic and interseismic fault activity, and can potentially provide precise age constraints on the timing of brittle deformation.

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Section: Calcite Precipitates In the Baraq Faultmentioning

confidence: 97%

Formation of fault-related calcite precipitates and their implications for dating fault activity in the East Anatolian and Dead Sea fault zones

Nuriel

Rosenbaum

Uysal

et al. 2011

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“…Relative abundances of rare earth elements (REEs), known as REE patterns in natural terrestrial waters, have been studied widely to ascertain the source material, path of transport, and carrier controlling behavior of REEs in the aquatic system (Henderson, 1984;Bertram and Elderfield, 1993;Bau and Dulski, 1996;Gaillardet et al, 1997;Johannesson et al, 1999). In the system, REE fractionation occurs during the reactions of dissolved REE species with particulate matter in natural terrestrial water reflecting similar but slightly different chemical prop- Johannesson et al, 2004;Tang and Johannesson, 2005).…”

Section: Introductionmentioning

confidence: 99%

Systematic change in relative stabilities of REE-humic complexes at various metal loading levels

2010

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“…As for the heavy REE enriched patterns, the previous investigators have suggested the significance of light REE scavenging by particulate matters in ocean and river environments (e.g., Byrne and Kim, 1990;Elderfield et al, 1990;Nozaki et al, 2000;Sholkovitz, 1992;Johannesson et al, 1999;Kuss et al, 2001). Moreover, some inorganic ligands tend to form stronger heavy REE complexes than light REE ones (Cantrell and Byrne, 1987;Wood, 1990;Lee and Byrne, 1993;Millero, 1992;Byrne and Li, 1995).…”

Section: Heavy Ree Enrichmentmentioning

confidence: 98%

“…Moreover, some inorganic ligands tend to form stronger heavy REE complexes than light REE ones (Cantrell and Byrne, 1987;Wood, 1990;Lee and Byrne, 1993;Millero, 1992;Byrne and Li, 1995). Predominance of bicarbonate complexes over carbonate and other complexes was demonstrated using the methods of Millero (1992) and the computer program of PHREEQE (Parkhurst et al, 1980) for the Oasis Valley groundwater case (Johannesson et al, 1999). They also pointed out that although formation of stronger bicarbonate complexes with increasing atomic number would be a basic mechanism for greater sorption affinity for causing the lighter REE to the aquifer materials, the particle/ water fractionation is necessary for causing the light/heavy REE fractionation.…”

Section: Heavy Ree Enrichmentmentioning

confidence: 99%

Rare earth elements in stream waters from the Rokko granite area, Japan: Effect of weathering degree of watershed rocks.

Nakajima

Terakado

2003

Geochem. J.

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The concentrations of major elements and rare earth elements (REE) of the stream waters from the Rokko granite area, Japan, were analyzed to examine the relationship between the degree of weathering and chemistry of the waters. The clay minerals in the related soils from the watershed areas were also examined. It was found that the relative proportion of kaolinite to total clay minerals is a good measure for the degree of weathering of the area. The Ca concentrations of the stream waters are rather high in comparison with other cations such as Na, K and Mg, and are well correlated with HCO 3 -. These facts indicate that the Ca concentrations in the stream waters are largely controlled by dissolution of calcite that occurs as disseminated crystals in granites. The Ca/Na molar ratio in the waters decreases with increasing kaolinite/ clay ratio in the related soils. The high Ca waters tend to occur in the fresh or weakly weathered areas, which is attributed to abundant calcite in these granites. By contrast, in the strongly weathered areas, where calcite had already been consumed via previous weathering processes, low Ca waters occur. The REE abundances, especially light REE, of the stream waters tend to be high in the strongly weathered watershed areas, and low in the fresh or weakly weathered watershed areas. This is attributed to either enhanced REE leaching from rocks in strongly weathered watershed areas due to larger solid surface areas or increased weathering of accessory minerals such as apatite. Interestingly, the magnitude of negative Ce anomalies appears to be inversely related to the degree of weathering. We suggest that the magnitude of Ce anomalies in those waters is largely controlled by mechanical filtration of CeO 2 during infiltration in micro-cracks or pores rather than by Eh-pH conditions.

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Rare earth element fractionation and concentration variations along a groundwater flow path within a shallow, basin-fill aquifer, southern Nevada, USA

Cited by 126 publications

References 43 publications

Formation of fault-related calcite precipitates and their implications for dating fault activity in the East Anatolian and Dead Sea fault zones

Formation of fault-related calcite precipitates and their implications for dating fault activity in the East Anatolian and Dead Sea fault zones

Systematic change in relative stabilities of REE-humic complexes at various metal loading levels

Rare earth elements in stream waters from the Rokko granite area, Japan: Effect of weathering degree of watershed rocks.

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