U-Pb zircon geochronology, geochemistry and tectonic implications of the early Devonian granitoids in the Liuyuan area, Beishan, NW China

Jiang Zhu,Xinbiao Lv,Sanguo Peng 한국지질과학협의회 2016 Geosciences Journal Vol.20 No.5

We present new zircon U-Pb ages, Sr-Nd isotopes, and whole-rock geochemistry of the early Devonian granitoids in the south Beishan area. LA-ICP-MS zircon U-Pb dating indicate that the Huitongshan and Shijinpo granitoids have crystallization ages of 418.5 ± 4.4 Ma (MSWD = 0.31) and 404.4 ± 1.8 Ma (MSWD = 0.20), respectively. Mineralogical and geochemical characteristics suggest that the Huitongshan syenogranites are highly fractionated I-type granites, and the Shijinpo granitoids are A-type granites. They belong to the high-K calc-alkaline and shoshonitic series, and are weakly peraluminous-metaluminous. εNd(t) of the Huitongshan granite vary from –0.4 to –1.0, with TDM2 model ages ranging from 1.20 to 1.25 Ga. While εNd(t) of the Shijinpo granite vary from –1.7 to –2.4, while TDM2 model ages ranging from 1.29 to 1.35 Ga. The Sr-Nd isotopic and geochemical signatures suggest that these granitoids formed through fractional crystallization of magmas derived by partial melting of juvenile crustal source. We interpret that these early Devonian I- and A-type granitoids generated in the subduction setting, probably associated with the upwelling asthenosphere through a slab window.

LA-ICP-MS zircon U-Pb dating, geochemistry and tectonic implications of the Neoproterozoic Xiaoxigong granite at Dunhuang block, northeastern Tarim, NW China

Jiang Zhu,Xinbiao Lv,Sanguo Peng 한국지질과학협의회 2015 Geosciences Journal Vol.19 No.4

We present new zircon U-Pb ages, Hf isotopes, and whole-rock geochemistry of the Xiaoxigong granite pluton in the Dunhuang block, northeastern Tarim Craton. LA-ICPMS zircon U-Pb dating yields a weighted mean 206Pb/238U age of 841.3 ± 8.1 Ma (MSWD = 4.4), interpreted as the emplacement age of the Xiaoxigong granite. Zircons have εHf(t) values ranging from +4.53 to +8.63 and TDM2 model ages from 1.16 to 1.38 Ga. Geochemical characteristics show that the granite belongs to the shoshonite series and has weakly peraluminous-metaluminous features. It is enriched in Si, K, Na, Rb, Th and REE, and has elevated Ga/Al ratios and high (Zr + Nb + Ce + Y) abundance, and is depleted in Mg, Ca, Mn, Ba, Sr, P and Ti. The REE composition shows significant negative Eu anomalies (Eu/Eu* = 0.18–0.31) and low (La/Yb)N (4.54–7.33). It is typical aluminous A-type granite. The geochemical and Hf isotopic signatures suggest that the Neoproterozoic Xiaoxigong granite was generated by partial melting of crustal rocks during the the post-orogenic period.

Metallogeny of the Poyi magmatic Cu-Ni deposit: revelation from the contrast of PGE and olivine composition with other Cu-Ni sulfide deposits in the Early Permian, Xinjiang, China

Yuegao Liu,Xinbiao Lv,Longshuai Yang,Hufei Wang,Yafei Meng,Qie Yi,Bo Zhang,Jianliang Wu,Jian Ma 한국지질과학협의회 2015 Geosciences Journal Vol.19 No.4

Permian mafic-ultramafic intrusions in or besides the Central Asian Orogenic Belt (CAOB) have been the focus of several recent studies, mainly located in Altay, East Tianshan, and Beishan Rift from north to south. Some of them host economic magmatic sulfide deposits. Among those, Poyi is a large magmatic Cu-Ni sulfide deposit related to ultramafic rock in Beishan Rift. Poyi does not have massive ore, but only disseminated ore in hornblende- peridotite, so Poyi is not as rich as the Karatongk Cu-Ni deposit in the Altay area or the Huangshandong and Tulargen Cu- Ni sulfide deposits in Eastern Tianshan. To address these questions, this paper contrasts the feature of PGE (Platinum Group Element) and olivine composition in magmatic Cu-Ni deposits between three regions (Altay, East Tianshan, and Beishan Rift) to provide a view of the metallogenic process of the Poyi magmatic Cu-Ni deposit. The degree of sulfide segregation (DSS) of Poyi is around 0.01%; the value of R (the ratio of the mass of silicate magma to the mass of sulfide that reached equilibrium together) is 500–5000, and is 2333 on average; the R value of Cu-Ni sulfide deposits in East Tianshan is in the range of 100–500, and the degree of sulfide segregation is about 0.013%; Poyi Cu-Ni deposit is not as rich as the magmatic Cu-Ni deposits in East Tianshan, probably because the degree of sulfide segregation of the former (0.01%) is lower than that of the latter (0.013%). From Beishan area to East Tianshan and then to Altay Region, the R value changed from 2333 to 100–500 and then to 100 according to the theory of Naldrett (2011). Poyi does not have the potential to be a PGE deposit. The olivine of Poyi has higher contents of MgO and SiO2 and lower contents of FeO and CaO, which reach sulfur saturation more easily, but due to the lack of sulfur, it is still very difficult to reach sulfur saturation, and therefore the olivine of Poyi has the highest Ni content among the Permian magmatic Cu-Ni deposits in Xinjiang.

Geochronological and geochemical constraints on the ore-related granites in Huanggang deposit, Southern Great Xing’an Range, NE China and its tectonic significance

Wei Mei,Xinbiao Lü,Zhi Liu,Rankun Tang,Zhilong Ai,Xiangdong Wang,Mamady Cisse 한국지질과학협의회 2015 Geosciences Journal Vol.19 No.1

Huanggang skarn Fe-Sn deposit is located in themain ridge Sn-polymetallic metallogenic sub-belt of the SouthernGreat Xing’an Range. A combination of zircon U-Pb age, geochemistryand Hf isotopic composition are reported for the orerelatedgranite (K-feldspar granite) of the Huanggang deposit toconstrain its petrogenesis and tectonic setting. LA-ICP-MS U-PbZircon dating results indicate that the K-feldspar granite wasintruded at 145.3 ± 1.6Ma. The K-feldspar granites belong to high-K calc-alkaline and shoshonite series, mainly peraluminous. Theserocks have a negative slope from La to Lu with strongly negativeEu anomalies, they demonstrate negative Ba, Sr P, Ti and Nbspikes and positive Th, U, Nd spikes on the normalized incompatibleelement diagrams. The regional geological setting togetherwith the geochemistry of the K-feldspar granite indicates that it isformed in a post-orogenic setting. The zircon Hf isotopic compositions(εHf(t): +5.2 to +6.6, 176Hf/177Hf: 0.282837‒0.282876) indicateboth juvenile crust sources that originated from depleted mantleand some ancient continental crust sources contributed to its origin,and there is a significant addition of juvenile crust under theSouthern Great Xing’an Range during the time from Paleo-Neoproterozoicto Phanerozoic.

연구논문 : 여수 공단지역 거주자들의 폐기능과 영향 요인

홍은주,안기섭,정은경,손부순,( Xinbiao Guo ) 한국환경과학회 2011 한국환경과학회지 Vol.20 No.7

Objectives: This study is aimed at identifying the influential factors on the pulmonary function of ordinary residents in the surrounding areas of Yeosu Industrial Complex. Methods: The PFT (Pulmonary Function Test) was conducted on the target residents numbering 989 people (male 361, female 628). The exposed group (813 people) resided within the radius of 5km from Yeosu Industrial Complex and the control group (176 people) resided in the radius of more than 15 km from May 2007 to November 2007. The survey also took into account other factors including personal characteristics, life habits, respiratory diseases and allergic symptoms, medical histories, and the living environments of the residents in order to further identify influential factors on pulmonary function. Result: When comparing the PFT values of the exposure groups to the control group of the same city, values of the exposure groups were meaningfully lower with an %FEV1 of 107.05% and %FVC of 100.28%. Conversely, the control group reported an %FEV1 and %FVC of 107.26% and 102.85% respectively, indicating that ambient air pollutants reduce lung function. The odds ratio of asthma diagnosis history increased when a subjects residence was close to a heavily trafficked road, traffic amount was huge, a bed was used, and the family had less than four members. However the results were not statistically meaningful. The odds ratios of abnormal pulmonary function were statistically higher among those with asthma(OR=4.29, CI=1.75-10.56), wheezing (OR=2.59, CI=1.24-5.41), and nasal congestion (OR=2.87, CI=1.36-6.08) (p<0.01). The factors affecting FEV1 were symptoms including asthma, passive smoking and allergic eye disease (R2=0.049, p<0.001). For the FVC symptoms including asthma (R2=0.014, p<0.001) were measured. The analysis showed that FVC decreased with increases in O3 and CO(p<0.01). Furthermore, FEV1 decreased with increases in O3(p<0.01). Conclusions: These results will provide preliminary data for establishing responsive measures to protect the health of residents in industrial complexes from air pollution, and to develop lasting environmental health policies.

Primordial Drivers of Diabetes Heart Disease: Comprehensive Insights into Insulin Resistance

Yajie Fan,Zhipeng Yan,Tingting Li,Aolin Li,Xinbiao Fan,Zhongwen Qi,Junping Zhang 대한당뇨병학회 2024 Diabetes and Metabolism Journal Vol.48 No.1

Insulin resistance has been regarded as a hallmark of diabetes heart disease (DHD). Numerous studies have shown that insulin resistance can affect blood circulation and myocardium, which indirectly cause cardiac hypertrophy and ventricular remodeling, participating in the pathogenesis of DHD. Meanwhile, hyperinsulinemia, hyperglycemia, and hyperlipidemia associated with insulin resistance can directly impair the metabolism and function of the heart. Targeting insulin resistance is a potential therapeutic strategy for the prevention of DHD. Currently, the role of insulin resistance in the pathogenic development of DHD is still under active research, as the pathological roles involved are complex and not yet fully understood, and the related therapeutic approaches are not well developed. In this review, we describe insulin resistance and add recent advances in the major pathological and physiological changes and underlying mechanisms by which insulin resistance leads to myocardial remodeling and dysfunction in the diabetic heart, including exosomal dysfunction, ferroptosis, and epigenetic factors. In addition, we discuss potential therapeutic approaches to improve insulin resistance and accelerate the development of cardiovascular protection drugs.

광양 제철소 주변지역 거주자들의 폐기능과 영향 요인

홍은주,안기섭,정은경,최재호,손부순,Hong, Eun-Ju,Ahn, Gi-Sub,Chung, Eun-Kyung,Choi, Jae-Ho,Guo, Xinbiao,Son, Bu-Soon 한국환경보건학회 2011 한국환경보건학회지 Vol.37 No.3

Objectives: This study aims to identify the influential factors on the pulmonary function of targeted general residents in the areas surrounding Gwangyang Steel Mill. Methods: An PFT (Pulmonary Function Test) was conducted from May 2007 to November 2007 on 974 target residents (438 male, 536 female), including an exposed group (674 people) who resided within a radius of 5 km from Gwangyang Steel Mill in Gwangyang-si, Jeollanam-do and a control group (300 people) who resided outside a radius of 15 km. A survey related to personal characteristics, life habits, respiratory diseases and allergic symptoms, medical histories and living environments of the residents was also conducted to identify influential factors on pulmonary function. Results: As %$FEV_1$ and %FVC of the exposed group are 99.17% and 96.98%, respectively, and those of the control group are 105.47% and 101.91%, respectively, with the PFT values of the exposed group being lower than those of the control group (p<0.001), it turns out that the pollution in the industrial complex is likely to trigger a reduction in the pulmonary function of local residents. The odds ratio analysis result for asthma diagnosis history indicates that the odds ratios tend to be higher among surveyed residents who are living near above-average traffic volumes and are using beds, where it is statistically meaningful that especially the odds ratios are higher if the residences are closer to roads (p<0.01, CI=1.12-4.52). The factors that affect the FEV1 are identified as smoking, passive smoking, asthma diagnosis history, nasal congestion symptoms and allergic eye disease ($R^2$=0.154, p<0.001). The factors that affect the FVC are identified as smoking, passive smoking, asthma diagnosis history and allergic coryza ($R^2$=0.158, p<0.001). In addition, the analysis result for the relevance of air pollution levels to pulmonary function ($FEV_1$, FVC) shows that FEV1 and FVC tend to decrease as the concentration of $O_3$ increases. Conclusions: We believe that this study may provide preliminary data for the development of preventive measures for health effects on the residents and environmental health control measures for environmental pollution in the industrial complex area.