Coral-based high-resolution rare earth element proxy for terrestrial sediment discharge affecting coastal seawater quality, Great Barrier Reef

Saha, Narottam; Webb, Gregory E.; Zhao, Jian‐xin; Nguyen, Ai Duc; Lewis, Stephen E.; Lough, Janice

doi:10.1016/j.gca.2019.04.004

Cited by 22 publications

(3 citation statements)

References 86 publications

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“…(2014), which were further vigorously assessed in Saha, Webb, Zhao, et al. (2019). Sample analyses were completed using a Thermo X‐series II Inductively Coupled Plasma‐Mass Spectrometer at the Radiogenic Isotope Facility at the University of Queensland.…”

Section: Methodsmentioning

confidence: 99%

Coral Reveals a Transition in Sources of Seawater Vanadium From Submarine Groundwater Discharge to Upwelling in the Northern South China Sea

Guo,

Jiang,

et al. 2023

JGR Oceans

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In recent decades, vanadium (V) levels in the environment have dramatically increased and will continue to rise alarmingly in the future. Conventional methods for assessing oceanic V typically only involved the collection of seawater and sediments, which significantly limited our understanding of the dynamics of oceanic V and its relationship to environment and climate. Here, the interannual temporal variations in surface seawater V levels in the northern South China Sea, were reconstructed utilizing a 137‐year record of V/Ca ratios from Porites lutea coral from Xiaodonghai Bay off Sanya. We observed that anthropogenic activities had a limited impact on the V levels of surface seawater in the study area, whereas V variability exhibited significant disparities across different time periods. Precipitation‐related submarine groundwater discharge (SGD) recharge was the primary driver of V variation prior to 1990, with tropical cyclones (TCs) playing a detectable role in total precipitation during this period. Conversely, changes in surface seawater V levels after 1990 were predominantly linked to increasingly intense upwelling driven by summer winds. The recharge processes in unconfined groundwater systems within the study area might generate favorable oxic and alkaline conditions, which facilitated mineral dissolution and/or desorption reactions that elevated V concentrations along the groundwater flow path, which were recorded in coral skeletal V/Ca ratios. This study confirmed the seawater V was dominated by SGD and upwelling near Sanya, providing essential evidence for comprehending the geochemical behavior of V and the impact of ocean‐atmospheric climate interactions on long‐term variations in seawater V levels.

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Section: Methodsmentioning

confidence: 99%

Coral Reveals a Transition in Sources of Seawater Vanadium From Submarine Groundwater Discharge to Upwelling in the Northern South China Sea

Guo,

Jiang,

et al. 2023

JGR Oceans

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“…Trace element analyses of travertine samples were carried out on a Thermo X‐series II inductively coupled plasma mass spectrometry at the Radiogenic Isotope Laboratory of the University of Queensland with instrument conditions as described in detail in Saha et al (). Briefly, carbonates were dissolved in a 2% nitric acid solution embedded with internal standards.…”

Section: Samples and Methodsmentioning

confidence: 99%

Geochemistry of Fluid Inclusions in Travertines From Western and Northern Turkey: Inferences on the Role of Active Faults in Fluids Circulation

Rizzo

Uysal

Mutlu

et al. 2019

Geochem Geophys Geosyst

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The understanding of the relationship between the geochemistry of fluids circulating during travertine deposition and the presence of active faults is crucial for evaluating the seismogenetic potential of an area. Here we investigate travertines from Pamukkale and Reşadiye (Turkey), sited in seismic regions and next to thermal springs. These travertines formed ~24,500–50,000 (Pamukkale) and ~240–14,600 years (Reşadiye) BP. We characterize fluid inclusions (FIs) and studied concentration of H2O, CO2, O2 + N2, and 3He, 4He, 20Ne, and 40Ar, and bulk composition (trace elements and δ13C‐δ18O). FIs from both localities are mainly primary with low salinity and homogenization temperature around 136–140 °C. H2O is the major component followed by CO2, with the highest gas content measured in Pamukkale travertines. Concentrations of Ne‐Ar together with O2 + N2 indicate that travertines from both areas precipitated from atmosphere‐derived fluids. The 3He/4He is 0.5–1.3 Ra in Pamukkale and 0.9–4.4 Ra in Reşadiye. Samples with R/Ra > 1 are modified by cosmogenic 3He addition during exposure to cosmic rays. Excluding these data, FIs of Reşadiye are mostly atmosphere‐derived. This implies a shallow formation where the circulation was dominated by meteoric waters, which is consistent with their young age. Instead, FIs of Pamukkale show mixing of mantle‐, crustal‐, and atmosphere‐derived He, indicating that these travertines formed in lithospheric fractures. Based on the δ13CCO2 and δ18O of bulk rocks, we infer that travertines formed involving crustal‐ (mechanochemical rather than organic) and mantle‐derived CO2. Trace elements of Pamukkale and Reşadiye show comparable rare earth element patterns. We conclude that travertines formed in response of seismogenetic activity.

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“…A similar mechanism of calcium replacement could be expected in the shells or skeletons of marine calcifiers since they intensively use calcium from seawater in the biomineralization process to form internal or external skeleton structures made up largely of CaCO 3 . REE distribution was studied in marine biogenic carbonate skeletons of microbialites [53][54][55], corals [56][57][58][59][60][61] and foraminifera [62][63][64][65] in relation to their environment. There are a number of studies on the accumulation of REE in freshwater and marine molluscs in their natural habitat [4,[66][67][68][69][70][71][72][73][74][75][76][77][78][79][80][81] and on REE effects on molluscs exposed to these metals in laboratory conditions [82][83][84][85][86][87][88][89].…”

Section: Introductionmentioning

confidence: 99%

Rare Earth Elements in Shells of Black Sea Molluscs: Anomalies and Biogeochemical Implications

Kapranov,

Ryabushko,

Dikareva

et al. 2024

JMSE

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Rare earth elements (REE) are a class of increasingly used high-tech product components and new emerging environmental pollutants, which are accumulated, in particular, in marine biota. In this study, REE contents were estimated in shells of several molluscs common in the Black Sea. The summed REE contents in mollusc shells decreased in the following order of species: Magallana gigas = Anadara kagoshimensis > Flexopecten glaber ponticus ≥ Rapana venosa > Mytilus galloprovincialis, ranging from 0.46 to 1.9 mg·kg−1. Canonical analysis of principal coordinates allowed for the correct identification of species based on the REE composition in no fewer than 67% of the samples. The mollusc shells were anomalously enriched in Sc, Y, La, Eu and Tb, most likely due to anthropogenic contamination. The Y/Ho ratios in all samples were represented by two fit values: 23.2 (chondritic) and 67.6 (superchondritic, mainly associated with A. kagoshimensis). A new universal relationship linking the contents of three light and heavy REE in Black Sea mollusc shells was proposed: Ce0.3 Er0.7⁄Yb = 2.00 ± 0.46 (mean ± standard deviation).

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Coral-based high-resolution rare earth element proxy for terrestrial sediment discharge affecting coastal seawater quality, Great Barrier Reef

Cited by 22 publications

References 86 publications

Coral Reveals a Transition in Sources of Seawater Vanadium From Submarine Groundwater Discharge to Upwelling in the Northern South China Sea

Coral Reveals a Transition in Sources of Seawater Vanadium From Submarine Groundwater Discharge to Upwelling in the Northern South China Sea

Geochemistry of Fluid Inclusions in Travertines From Western and Northern Turkey: Inferences on the Role of Active Faults in Fluids Circulation

Rare Earth Elements in Shells of Black Sea Molluscs: Anomalies and Biogeochemical Implications

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