The occurrence of vanadium in nature: its biogeochemical cycling and relationship with organic matter—a case study of the Early Cambrian black rocks of the Niutitang Formation, western Hunan, China

Awan, Rizwan Sarwar; Liu, Cheng‐Lin; Shangfeng, Yang; Wu, Yuping; Zang, Qibiao; Khan, Ashar; Li, Guoxiong

doi:10.1007/s11631-021-00482-2

Cited by 23 publications

(6 citation statements)

References 147 publications

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“…There is a significant difference in pH. Several rock minerals and organic matter intermingle due to a rise or decrease in pH levels in shallow groundwater [74]. Shallow groundwater is slightly alkaline in the wet season and neutral in the dry season.…”

Section: Notementioning

confidence: 99%

Seasonal Analysis of Shallow Groundwater Using Multivariate Statistics in a Semiarid Basin, Northern Nigeria

Wali,

Alias,

Harun

2024

Preprint

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Seasonal variations in the hydrochemistry of shallow groundwater can be due to the interactions between internal geochemical processes and external factors such as rainfall and human activities. This study applied seasonal and multivariate statistical analyses to understand the hydrochemical controls on shallow groundwater. The study area was divided into three sub-basins, or clusters (i.e., Birnin kebbi, Sokoto and Gusau). Fifteen shallow groundwater samples were derived from each cluster, totalling ninety shallow groundwater samples for dry and wet seasons. Physical parameters, including Temperature, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Dissolved Oxygen (DO), and pH, were analysed in situ using handheld metres. However, chemical parameters (Ca2+, Mg2+, Na+, K+, Fe3+, Cu2+, Zn2+, CO3-, HCO3-, Cl-, SO42-, PO43-, NH3 and NO3-) were analysed in the laboratory. Subsequently, statistics were applied to study the impact of seasonality and groundwater evolution. Results of the Kruskal-Wallis test revealed that seasonality exerts a considerable influence on shallow groundwater through a significant difference in Temperature, EC, DO, TDS, HCO3-, Cl-, NH3 and PO43-. Pearson’s correlation analysis revealed strong relationships between hydrochemical elements, which suggest natural and anthropogenic influences on shallow groundwater evolution. Correlation results were concurrent with principal component analysis (PCA), hierarchical clustering analysis (HCA), and Piper and Gibbs models. Therefore, this study inferred that seasonality and rock weathering are the primary mechanisms controlling shallow aquifers' hydrochemistry in a semiarid Sokoto Basin. The seasonal and multivariate statistics provide a framework for more accurate shallow groundwater quality analysis while considering multiple groundwater quality parameters under different environmental conditions. It is hoped that the results of this study will inspire other researchers to use a similar method, especially those in semiarid environments. Seasonal and multivariate statistical analyses provide a user-friendly tool for monitoring shallow groundwater quality monitoring systems in global semiarid environments.

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Section: Notementioning

confidence: 99%

Seasonal Analysis of Shallow Groundwater Using Multivariate Statistics in a Semiarid Basin, Northern Nigeria

Wali,

Alias,

Harun

2024

Preprint

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“…Clay minerals often play an important role in the retention of trace elements in natural environments. V often adsorbs onto clay minerals and pyrite through surface complexation and electrostatic interaction (e.g., via Na + bridge) [68,69]. Cr is also enriched on clay minerals through the formation of stable surface complexes, surface precipitation, and ion exchange [70,71].…”

Section: Immobilization Of the Phes By Mineral Precipitatesmentioning

confidence: 99%

Influence of Mineral Deposition on the Retention of Potentially Hazardous Elements in Geothermal Spring Sediments

Wang

Cheng

2023

Sustainability

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Geothermal springs are known to contain a variety of potentially hazardous elements (PHEs), which may threaten human health. Their release on Earth’s surface is largely dependent on the retention by the sediments at the spring outflux. In this study, the hot spring waters and the sediments at the corresponding sites were collected from the Nagqu geothermal field on the Tibetan Plateau. The water geochemistry and sediment mineralogy were analyzed using inductively coupled plasma mass spectrometry (ICP-MS), X-ray fluorescence (XRF), and X-ray diffraction (XRD). The association of PHEs with minerals was analyzed. The results indicate that while the concentrations of PHEs were highly elevated, Be, As, and Tl in some hot springs exceeded the criteria for class III groundwater in China by up to 2, 2, and 19 times, respectively. Cs occurred at relatively high levels, up to 776 μg/L. As, Co, Se, Tl, and U in the hot spring waters were probably captured by iron sulfide minerals in the sediments, while Be and Cs were strongly retained by the carbonate minerals. The releases of V and Cr were apparently regulated by the clay minerals. Overall, the mobility of PHEs from the geothermal springs is controlled by the deposition of minerals at the spring vents.

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“…There are three types of proposed OM enrichment models, that is, production model, preservation model, and combinational productionpreservation model (Awan et al, 2020;Calvert & Fontugne, 2001).…”

Section: Enrichment Of Ommentioning

confidence: 99%

“…However, it was severe during the deposition of the middle part of the Niutitang Formation. Several previous researchers have shown that hydrothermal activities dominated the Yangtze Block during the Early Cambrian period(Awan et al, 2020;Tang et al, 2017;C. Wu et al, 2014), which might release volcanic CO 2 .…”

mentioning

confidence: 96%

“…The pyrolysis result showed an extremely low HI with a high T max value, which made it challenging to distinguish kerogen types (Figure16). Therefore, the most effective and reliable methods, KTI (KTI via organic petrographic macerals), and carbon isotope (δ 13 C) studies, to ascertain the type of kerogen in over matured sediments Awan et al (2020). demonstrated that the Niutitang Formation in the Yangtze region contains only a sapropelic maceral group (hydrogen-rich) based on the organic petrographic analysis, which indicates the presence of type I kerogen in these black rocks.The organic carbon isotopes (δ 13 C org ) might be inherited from their source material during thermal evolution, and different organisms have unique carbon isotopic compositions.…”

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confidence: 99%

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Sedimentary geochemistry of the Early Cambrian Niutitang Formation to reconstruct the palaeo‐depositional environments and to evaluate the organic matter enrichment mechanism from the Yangtze Block, South China

et al. 2021

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In the Yangtze Block, the Early Cambrian Niutitang Formation is mainly composed of mudstone, shale, and carbonates which are important for investigating the depositional environment and evolution of the Early Cambrian rocks. The Niutitang Formation in the study area has a greater geologic interest due to its polymetallic beds, depositional age, variation in environmental conditions, Cambrian explosion, organic matter (OM) enrichment, algal boom, etc. This research represents the sedimentary geochemistry of the Early Cambrian Niutitang Formation to reconstruct the palaeo‐depositional environment and to evaluate the OM enrichment mechanism by means of total organic carbon (TOC), biomarkers, carbon isotopes, mineralogy, scanning electron microscope, etc. Based on the variation in TOC content, the Niutitang Formation is divided into three parts (upper, middle, and lower). The majority of the samples from the middle part of the Niutitang Formation exhibit an excellent source of hydrocarbon (TOC > 4.0 wt%) relative to the upper and the lower part. The lighter carbon isotopic composition (<−30.7%) in these sediments reveals the presence of the I‐amorphous kerogen group. Moreover, these lighter δ13Corg values suggest the presence of type‐I oil‐prone kerogen. Saturated hydrocarbon in these rocks showed the dominance of short‐chain n‐alkanes maximizing at C18. The predominance of these n‐alkanes represents that the OM is chiefly derived from algal/bacterial input. Similarly, the dissymmetric V shape of C27‐C28‐C29 steranes with a predominance of C27 and the higher values of in all three parts reflects that the OM in these rocks is chiefly originated from the lower aquatic marine organisms. Based on the Pr/Ph ratio, it is predicted that the middle part of the Niutitang Formation was deposited in extreme anoxic conditions (Pr/Ph < 0.5), whereas the upper and lower parts were deposited in relatively less anoxic conditions. Some biomarkers have more stable stereochemistry, which cannot be affected by diagenetic processes. These stable configurations are utilized to measure the maturity of OM, that is, Ts/(Ts + Tm), C29ββ/(ββ + αα), C29αα20S/(20S + 20R) steranes, and homohopane C31 22S/(22S + 22R). These geochemical indices reveal that the Early Cambrian Niutitang Formation in the studied area is mature to the post‐mature in the gas generation phase. Moreover, the hydrothermal fluids rich in metallic elements (e.g., Mo, Zn, V, and U) from the deeper part of the Earth owing to elongational forces among Yangtze and Cathaysian plates over Early Cambrian time entered the oceanic basin via remnant features (fissure and cracks) and through upwelling phenomena interacted with shelf sediments. At the ocean's surface, these nutrient‐rich fluids enhanced the breeding and evolution of marine life (bio‐productivity), which created hypoxic water conditions suitable for the preservation of OM in these rocks.

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The occurrence of vanadium in nature: its biogeochemical cycling and relationship with organic matter—a case study of the Early Cambrian black rocks of the Niutitang Formation, western Hunan, China

Cited by 23 publications

References 147 publications

Seasonal Analysis of Shallow Groundwater Using Multivariate Statistics in a Semiarid Basin, Northern Nigeria

Seasonal Analysis of Shallow Groundwater Using Multivariate Statistics in a Semiarid Basin, Northern Nigeria

Influence of Mineral Deposition on the Retention of Potentially Hazardous Elements in Geothermal Spring Sediments

Sedimentary geochemistry of the Early Cambrian Niutitang Formation to reconstruct the palaeo‐depositional environments and to evaluate the organic matter enrichment mechanism from the Yangtze Block, South China

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