THE CARBONACEOUS ROCKS IN CRETACEOUS DEPOSITS OF THE KAMCHATSKY MYS PENINSULA: GEOCHEMISTRY, METAL ACCUMULATION AND SEDIMENTATION CONDITIONS

In the Cretaceous paleoceanic deposits of Eastern Kamchatka, carbonaceous beds have been studied, the origin of which relates to the oceanic anoxic events. In carbonaceous rocks, the contents of trace elements and noble metals: Ba, Cu, Ni, Zn, Mo, V, U, Y, Au, rare-earth elements and platinoids are increased in comparison with the hosted jaspers and limestones. In particular, the Au content in ash-laden carbonaceous rocks reaches 0.8 ppm, and Pt 2.1 ppm. The geochemical proxies Mo/Mn and V/(V + Ni) indicate the accumulation of carbonaceous deposits in euxinic conditions. The significant non-lithogenic excess Ba indicates a high bio-productivity in the upper part of the water column. High bio-productivity and euxinic conditions of sedimentation caused the enrichment of carbonaceous rocks with many trace elements. Phosphorus trapped into the sediments with bone detritus, which subsequently sorbed rare-earth elements and yttrium from sea water during its fossilization. Copper, zinc and vanadium are associated with the Fe-sulfide phase (framboidal pyrite). Noble metals accumulated during sedimentation and early diagenesis were deposited with organic matter and/or directly from seawater. In carbonaceous rocks, they appear to be in the form of organometallic compounds or enter into the composition of framboidal pyrite. The sedimentation occurred at the top of a seamount in the Pacific Ocean. The studied deposits are similar to the Cretaceous sediments that formed at the tops of seamounts in the northwestern Pacific, where carbonaceous beds are also present in the sections. Organic-rich sediments were deposited within the oxygen minimum zone during periods of maximum bio-productivity of plankton.

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Evaluation of carbonate diagenesis: A comparative study of minor elements, trace elements, and rare-earth elements (REE+Y) between Pleistocene corals and matrices from Grand Cayman, British West Indies

Sedimentary Geology ◽

10.1016/j.sedgeo.2014.10.004 ◽

2014 ◽

Vol 314 ◽

pp. 31-46 ◽

Cited By ~ 12

Author(s):

Rong Li ◽

Brian Jones

Keyword(s):

Trace Elements ◽

Rare Earth ◽

Comparative Study ◽

Rare Earth Elements ◽

West Indies ◽

Carbonate Diagenesis ◽

British West Indies ◽

Grand Cayman ◽

Minor Elements

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Seasonal changes in concentrations of trace elements and rare earth elements in shoot samples of Juncus effusus L. collected from natural habitats in the Holy Cross Mountains, south-central Poland

Chemosphere ◽

10.1016/j.chemosphere.2018.12.062 ◽

2019 ◽

Vol 219 ◽

pp. 954-960 ◽

Cited By ~ 3

Author(s):

Karina Krzciuk ◽

Agnieszka Gałuszka

Keyword(s):

Trace Elements ◽

Rare Earth ◽

Rare Earth Elements ◽

Seasonal Changes ◽

Juncus Effusus ◽

Natural Habitats ◽

Holy Cross Mountains ◽

Central Poland ◽

South Central

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Effective procedures for the determination of As, Cd, Cu, Fe, Hg, Mg, Mn, Ni, Pb, Se, Th, Zn, U and rare earth elements in plants and foodstuffs

Analytical Methods ◽

10.1039/c8ay01295d ◽

2018 ◽

Vol 10 (33) ◽

pp. 4094-4103 ◽

Cited By ~ 21

Author(s):

Fernanda Pollo Paniz ◽

Tatiana Pedron ◽

Bruna Moreira Freire ◽

Daiane Placido Torres ◽

Fábio Ferreira Silva ◽

...

Keyword(s):

Trace Elements ◽

Rare Earth ◽

Rare Earth Elements ◽

Icp Ms ◽

International Regulations ◽

Effective Procedures

There are several international regulations regarding trace elements. The use of ICP-MS for their determination is usually a difficult task, especially when Hg is one of the target elements.

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Geochemistry and Fuid-Inclusion Microthermometry of the Farsesh Barite Deposit, Iran

Geologos ◽

10.2478/logos-2014-0015 ◽

2014 ◽

Vol 20 (3) ◽

pp. 201-214 ◽

Cited By ~ 6

Author(s):

Alireza Zarasvandi ◽

Nazanin Zaheri ◽

Houshang Pourkaseb ◽

Abbas Chrachi ◽

Hashem Bagheri

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Open Space ◽

Sea Water ◽

Shear Zones ◽

Major And Trace Elements ◽

Petrographic Analysis ◽

Two Phase ◽

Moderate Salinity ◽

Scatter Plots

Abstract The Permian carbonate-hosted Farsesh barite deposit is located southeast of the City of Aligudarz in the province of Lorestan, Iran. Structurally, this deposit lies in the Zagros metallogenic belt and the Sanandaj-Sirjan Zone. Barite mineralisations occur as open-space flling veins, and as massive and replacement ores along fractures, faults and shear zones of the Permian carbonate host rocks. In order to determine the structure, in addition to pe-trographic and fuid-inclusions studies, an ICP-MS analysis was carried out in order to measure the major as well as the trace and rare earth elements. The Farsesh barite deposit has a simple mineralogy, of which barite is the main mineral, followed by calcite, dolomite, quartz, and opaque minerals such as Fe-oxides. Replacement of bar-ite by calcite is common and is more frequent than space-flling mineralisation. Sulphide minerals are minor and mainly consist of chalcopyrite and pyrite, which are altered by weathering to covellite, malachite and azurite. Petrographic analysis and micro-thermometry were carried out on the two-phase liquid/vapour inclusions in ellipsoidal or irregularly shaped minerals ranging in size from 5–10 µm. The measurements were conducted on fuid inclusions during the heating and subsequent homogenisation in the liquid phase. The low homogenisation temperatures (200–125°C) and low to moderate salinity (4.2–20 eq wt% NaCl) indicate that the barite had precipitated from hydrothermal basinal water with low to moderate salinity. It appears from the major and trace elements that geochemical features such as Ba and Sr enrichment in the barite samples was accompanied by depletion of Pb, Zn, Hg, Cu and Sb. The geochemistry of the rare earth elements, such as low σREE concentrations, LREE-enrichment chondrite-normalised REE patterns, the negative Ce and positive Eu anomalies, the low Ce/La ratio and the positive La and Gd anomalies, suggest that the Farsesh barite was deposited from hydrothermally infuenced sea water. The Farsesh deposit contains low-temperature hydrothermal barite. The scatter plots of the barite (close to sea water) in different areas on the CeN/SmN versus CeN/YbN diagram support the possibility that the barite was formed from seawater-bearing hydrothermal fuids.

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Comparison of the Mineral and Nutraceutical Profiles of Elephant Garlic (Allium ampeloprasum L.) Grown in Organic and Conventional Fields of Valdichiana, a Traditional Cultivation Area of Tuscany, Italy

Biology ◽

10.3390/biology10101058 ◽

2021 ◽

Vol 10 (10) ◽

pp. 1058

Author(s):

Stefano Loppi ◽

Riccardo Fedeli ◽

Giulia Canali ◽

Massimo Guarnieri ◽

Stefano Biagiotti ◽

...

Keyword(s):

Trace Elements ◽

Rare Earth ◽

Rare Earth Elements ◽

Water Content ◽

Human Health ◽

Soluble Sugars ◽

Allium Ampeloprasum ◽

Icp Ms ◽

Essential Trace Elements ◽

Reference Plant

In the Valdichiana area (Tuscany, Italy) an ancient native landrace of elephant garlic (Allium ampeloprasum L.), locally known as “Aglione della Valdichiana”, has long been cultivated. The aim of this study was to check whether there are differences in the mineral and nutraceutical profiles of the Aglione della Valdichiana cultivated conventionally and organically. Based on the analysis by ICP-MS of a wide array of major, minor, essential, and non-essential trace elements as well as rare earth elements, and the evaluation of the content of polyphenols, flavonoids, antioxidants, soluble proteins, soluble sugars, and starch, as well as the weight and water content, it was concluded that differences in the mineral and nutraceutical profiles of organically and conventionally grown bulbs were very limited. Only a statistically (p < 0.05) higher concentration of Cd (+2620%), Co (+113%), Mn (+55%), Rb (+180%), and Sb (+180%), as well as glucose (+37%) in conventionally cultivated bulbs emerged. Cadmium was the only element slightly higher than in the “reference plant,” but with a negligible risk (three orders of magnitude lower) for human health based on consumption. It is concluded that we failed to find evidence of healthier food or a higher nutraceutical quality for organically cultivated elephant garlic.

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Identifying Correlation of Coal Seams in the Tien Hai Area, Northern Vietnam by Using Multivariate Statistic Methods

Inżynieria Mineralna ◽

10.29227/im-2021-02-11 ◽

2021 ◽

Vol 1 (2) ◽

Author(s):

The Hung KHUONG ◽

Phuong NGUYEN ◽

Thi Cuc NGUYEN ◽

Nhu Sang PHAM ◽

Danh Tuyen NGUYEN

Keyword(s):

Trace Elements ◽

Rare Earth ◽

Coal Seam ◽

Rare Earth Elements ◽

Major And Trace Elements ◽

Coal Seams ◽

Multivariate Statistic ◽

Northern Vietnam ◽

Coal Deposits ◽

Indicator Elements

In northern Vietnam, the Tien Hai area is considered a high potential area of coal deposits. Twohundred fifty-six geochemical coal samples of 13 cores in the Tien Hai area investigate coal seams andcoal deposits to identify the correlation of coal seams. According to the statistical method and clusteranalysis of geochemical samples, the results indicate that the Mg, V, As, Ca, Zn, Cr, Co, K, Na, Sr, Fe,Ge, Re, U, Mo, Th, and Ga elements are good indicator elements of the major and trace elements in coal.Most of them comply with the normal or lognormal distribution rules. Besides, the Yb, Sc, Ho, Er, Tm,Lu, Y, Tb, Pr, Dy, and Sm elements are also good indicator elements for rare earth elements in the region.Therefore, the selected elements are used to identify the correlation of the coal seams in the Tien Hai area.Based on the similarity degree between studied objects, the results of grouping boreholes in coal seamsshow that the correlation of coal seam TV2-11 is suitable and acceptable, the coal seams TV3-6a, TV3-6b, and TV3-6c can be grouped into the coal seam TV3-6. These results present that the models can helpstudy geochemical coal samples and identify the correlation of the coal seams in the Tien Hai area.Additionally, the statistical analysis shows a remarkable degree to determine the correlation of the coalseams. Geochemical coal data can help to evaluate the indicator elements of the major, trace elements,and rare earth elements in coal seams and coal rashing of adjoining and pillar rocks in the Tien Hai area,northern Vietnam.

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