Origin of the subduction-related Tieli nephrite deposit in Northeast China: Constraints from halogens, trace elements, and Sr isotopes in apatite group minerals

Objective. The purpose of the present study was to investigate serum trace elements in Graves’ disease (GD) patients with or without orbitopathy in Northeast China. Methods. Patients with newly diagnosed Graves’ disease (HyGD) (n=66), GD patients with euthyroid status or subclinical thyroidism after treatment (EUGD) (n=55), GO patients with euthyroid status or subclinical thyroidism after treatment (GO) (n=57), and normal controls (NC) (n=66) were enrolled in this study. Serum trace elements were measured with ICP-MS. Results. Serum selenium (Se) levels in EUGD group (median: 7.53 µg/dL), HyGD group (median: 6.76 µg/dL), and GO group (median: 7.40 µg/dL) were significantly lower than those in NC group (median: 9.20 µg/dL, all P<0.01). Serum copper (Cu) levels in GO group (median: 95.93 µg/dL) were significantly lower than those in the NC group (median: 113.59 µg/dL, P=0.015). After being adjusted for multivariables, thyroid-specific antibodies grade was associated with low Se levels. Hyperthyroidism and thyroid-specific antibodies grade were associated with high Cu levels. In addition, orbitopathy was associated with low Cu levels. Conclusions. Thyroid autoimmunity was associated with low Se levels. Hyperthyroidism and thyroid autoimmunity may be associated with relatively high serum Cu levels. Alternatively, ophthalmopathy may be related to low serum Cu levels.

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Identification of Geochemical Tracers for Mesoscale Water Paths: Field and Experimental Laboratory Constraints with Major, Trace Elements and Sr Isotopes (Peyne, Hérault, S. France)

Mineralogical Magazine ◽

10.1180/minmag.1998.62a.2.271 ◽

1998 ◽

Vol 62A (2) ◽

pp. 1157-1158

Author(s):

E. Petelet

Keyword(s):

Trace Elements ◽

Sr Isotopes ◽

Geochemical Tracers ◽

Experimental Laboratory

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Baseline Concentrations of Trace Metals in Grassland Topsoils from West Jilin Province, Northeast China

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.347-353.2140 ◽

2011 ◽

Vol 347-353 ◽

pp. 2140-2145

Author(s):

Qing Wei Zhang ◽

She Li Chai ◽

Jing Cai ◽

Li Na Gao

Keyword(s):

Trace Elements ◽

Trace Metal ◽

Trace Element ◽

Northeast China ◽

Quality Standard ◽

Jilin Province ◽

Anthropogenic Sources ◽

Baseline Concentrations ◽

Highly Correlated ◽

West Jilin Province

The objective of this study was to determine the baseline concentrations of trace elements in grassland topsoils from 155 soil sampling sites in West Jilin province, Northeast China, to establish the relationships between the trace metal contents and soil physicochemical properties and major oxide contents and among trace metal concentrations themselves, and to identify the possible sources of trace element in soils. The baseline concentrations of trace elements(mg/kg) were: As 3.12-14.18, B 16.17-49.08, Cd 0.037-0.127, Co 0.96-15.28, Cr 18.87-60.83, Cu 10.81-24.75, Hg 0.004-0.035, Mn 171.25-657.87, Mo 0.08-1.15, Ni 6.79-30, Pb 12.58 -26.08, Se 0.03-0.36, and Zn 18.93-61.03. The upper baseline limits of these elements were all less than the Chinese Environmental Quality Standard for Soils, the Dutch Intervention Values for Soils, implying that trace element contents in the studied soils were of the safety levels.Fe2O3 and Al2O3 had stronger correlations with most trace elements than other oxides, and Co,Cr,Cu,Mn, Ni were highly correlated one another. Three types of geochemical associations were distinguished from this study:the first association involving As,Co,Cr,Cu,Mn,Mo,Ni,Pb,Zn,Al2O3 and Fe2O3 was mainly associated with Al,Fe-Mn oxides and/or with the Al-bearing clay minerals, suggesting that the trace elements were mainly derived from lithogenic and pedogenic processes; the second association including Se, Hg, Cd, CaO and organic carbon was mainly associated with organic matter and calcium oxides, showing that Se,Hg and Cd were mainly contributed by anthropogenic sources; the third association containing B, Na2O, K2O, MgO, pH, and electrical conductivity was mainly associated salinization processes of soils, implying that alkaline pH and high Na contents would enhance B concentration of soils.

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Three-stage modification of lithospheric mantle: Evidence from petrology, in-situ trace elements, and Sr isotopes of mantle xenoliths in the Cenozoic basalts, northeastern North China Craton

Geological Society of America Bulletin ◽

10.1130/b36140.1 ◽

2021 ◽

Author(s):

Xinran Xu ◽

Yanjie Tang ◽

Jifeng Ying ◽

Xinmiao Zhao ◽

Yan Xiao

Keyword(s):

Trace Elements ◽

North China Craton ◽

Lithospheric Mantle ◽

North China ◽

Major Elements ◽

Mantle Xenoliths ◽

Sr Isotopes ◽

The Core ◽

Concentration Changes ◽

Hydrous Melt

We present mineralogical and geochemical compositions of mantle xenoliths from two Cenozoic basalt localities of the northeastern North China Craton. These xenoliths include lherzolite, harzburgite, and websterite. They are generally fertile in major elements and different from the typical cratonic lithosphere, which is consistent with previous hypotheses regarding craton destruction. The ratios of 87Sr/86Sr and (La/Yb)N of clinopyroxenes (Cpx) in one lherzolite are relatively low in the core but high in the rim. The center of the Cpx grain has a high U concentration. Changes in trace elements and Sr isotopes indicate that later stage high 87Sr/86Sr melt metasomatism superimposed on the early hydrous melt/fluid. The Cpxs in some xenoliths are low in Ti/Eu but high in Ca/Al and light rare earth elements, which indicates carbonate melt metasomatism. 87Sr/86Sr is increased in the core and decreased in the rim of most Cpx grains, which reflects the superposition of two-stage metasomatism. The early agent should be high in 87Sr/86Sr, and the recent agent should be low in 87Sr/86Sr. The Cpxs in olivine websterite are low in 87Sr/86Sr (0.70220−0.70320), which reflects the recent metasomatism of asthenosphere-derived melt. Collectively, these observations reflect a three-stage modification of the lithospheric mantle. First-stage hydrous melt/fluid could come from the dehydration of young subducted plates. Second-stage melt/fluid of high 87Sr/86Sr could derive from the partial melting of the subducted altered oceanic crust, and the recent melt/fluid of low 87Sr/86Sr should be from the asthenosphere.

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Supplemental Material: Three-stage modification of lithospheric mantle: Evidence from petrology, in-situ trace elements, and Sr isotopes of mantle xenoliths in the Cenozoic basalts, northeastern North China Craton

10.1130/gsab.s.15101466.v1 ◽

2021 ◽

Author(s):

Xinran Xu ◽

Yanjie Tang ◽

et al.

Keyword(s):

Trace Elements ◽

North China Craton ◽

North China ◽

Major Element ◽

Equilibrium Temperature ◽

Mantle Xenoliths ◽

Sr Isotopes ◽

Temperature Estimation ◽

Icp Ms

Table S1: Petrological information and equilibrium temperature estimation for the studied samples; Table S2: Major element compositions (wt%) of minerals; Table S3: Trace element concentrations (ppm) of Cpx in xenoliths determined by LA-ICP-MS; Table S4: In situ Sr isotopic compositions of Cpx in the xenoliths.

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