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Oligocene subduction-related plutonism in the Nodoushan area,Urumieh-Dokhtar magmatic belt: Petrogenetic constraints from U-Pb zircon geochronology and isotope geochemistry

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Geoscience Frontiers 2019年第2期10卷 725-751页

作者： badieh shahsavari alavijeh Nematollah Rashidnejad-Omran Fatma Toksoy-K?ksal Wenliang Xu Jalil Ghalamghash Department of Geology Faculty of Basic SciencesTarbiat Modares University Department of Geological Engineering Middle East Technical University College of Earth Sciences Jilin University State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Research Institute for Earth Sciences Geological Survey of Iran

Geochemical data and Sr-Nd isotopes of the host rocks and magmatic microgranular enclaves(MMEs)collected from the Oligocene Nodoushan Plutonic Complex(NPC) in the central part of the Urumieh-Dokhtar Magmatic Belt(UDMB) were studied in order to better understand the magmatic and geodynamic evolution of the UDMB. New U-Pb zircon ages reveal that the NPC was assembled incrementally over ca. 5 m.y., during two main episodes at 30.52 ± 0.11 Ma and 30.06 ± 0.10 Ma in the early Oligocene(middle Rupelian) for dioritic and granite intrusives, and at 24.994 ± 0.037 Ma and 24.13 ± 0.19 Ma in the late Oligocene(latest Chattian) for granodioritic and diorite porphyry units,respectively. The spherical to ellipsoidal enclaves are composed of diorite to monzodiorite and minor gabbroic diorite(SiO_2 = 47.73-57.36 wt.%; Mg# = 42.15-53.04); the host intrusions are mainly granite,granodiorite and diorite porphyry(SiO_2 = 56.51-72.35 wt.%; Mg# = 26.29-50.86). All the samples used in this study have similar geochemical features, including enrichment in large ion lithophile elements(LILEs, e.g. Rb, Ba, Sr) and light rare earth elements(LREEs) relative to high field strength elements(HFSEs) and heavy rare earth elements(HREEs). These features, combined with a relative depletion in Nb,Ta, Ti and P, are characteristic of subduction-related magmas. Isotopic data for the host rocks display ISr = 0.705045-0.707959, εNd(t) =-3.23 to +3.80, and the Nd model ages(TDM) vary from 0.58 Ga to 1.37 Ga. Compared with the host rocks, the MMEs are relatively homogeneous in isotopic composition,with Isr ranging from 0.705513 to 0.707275 and εNd(t) from -1.46 to 4.62. The MMEs have TDM ranging from 0.49 Ga to 1.39 Ga. Geochemical and isotopic similarities between the MMEs and their host rocks demonstrate that the enclaves have mixed origins and were most probably formed by interactions between the lower crust-and mantle-derived magmas. Geochemical data, in combination with geodynamic evidence, suggest that

关键词： Urumiehe-Dokhtar magmatic belt Granitoid rocks Subduction Zircon U-Pb ages Radiogenic isotopes Central Iran

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Evaluation of Pedotransfer Functions for Estimating Soil Water Retention Curve of Saline and Saline-Alkali Soils of Iran

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Pedosphere 2011年第2期21卷 230-237页

作者： Y.ABBASI B.GHANBARIAN-alavijeh A.M.LIAGHAT M.SHORAFA Department of Irrigation and Reclamation Engineering University of TehranKaraj 31587-77871 (Iran) Department of Earth and Environmental Sciences Wright State UniversityDayton OH 45435 (USA) Department of Soil Science Engineering University of TehranKaraj 31587-77871 (Iran)

Soil water retention data are essential for irrigation scheduling and determination of irrigation frequency. However, direct measurement of this characteristic is time consuming and expensive and furthermore its spatial and temporal variabilities in field scales increase the number of measurements. Different pedotransfer functions, such as Saxton et al., Campbell, Vereecken et al., l^awls and Brakensiek, WSsten et al., Rajkni et al., Ghorbani Dashtaki and Homaee, Zacharias and Wessolek, and Rosetta, were evaluated to estimate soil water retention of saline and saline-alkali soils collected from south of Tehran, Iran. The saturation-extract conductivity of all the 68 samples and exchangeable sodium percentage of more than half of them were measured to be greater than 4 dS m-1 and 15%, respectively. The calculated Akaike＇s information criterion values showed that Saxton et al. and Campbell models were the best in estimation of soil water retention curve and total available water, respectively.

关键词： exchangeable sodium percentage irrigation frequency soil moisture curve total available water

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Partners in diabetes epidemic:A global perspective

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World Journal of Diabetes 2023年第10期14卷 1463-1477页

作者： Huan Wang Safoura Akbari-alavijeh Ranjit S Parhar Randy Gaugler Sarwar Hashmi College of Bioscience and Biotechnology Shenyang Agricultural UniversityShenyang 110866Liaoning ProvinceChina Rutgers Center for Vector Biology Rutgers UniversityNew BrunswickNJ 08901United States Department of Food Science and Technology College of AgricultureIsfahan University of TechnologyIsfahan 84156-83111Iran Department of Biological and Medical Research King Faisal Specialist Hospital and Research CentreRiyadh 11211Saudi Arabia Research and Diagnostics Ghazala and Sanya Hashmi FoundationHolmdelNJ 07733United States

There is a recent increase in the worldwide prevalence of both obesity and *** this review we assessed insulin signaling,genetics,environment,lipid metabolism dysfunction and mitochondria as the major determinants in diabetes and to identify the potential mechanism of gut microbiota in diabetes *** searched relevant articles,which have key information from laboratory experiments,epidemiological evidence,clinical trials,experimental models,metaanalysis and review articles,in PubMed,MEDLINE,EMBASE,Google scholars and Cochrane Controlled Trial *** selected 144 full-length articles that met our inclusion and exclusion criteria for complete *** have briefly discussed these associations,challenges,and the need for further research to manage and treat diabetes more *** involves the complex network of physiological dysfunction that can be attributed to insulin signaling,genetics,environment,obesity,mitochondria and *** recent years,there are intriguing findings regarding gut microbiome as the important regulator of *** approaches are necessary for speeding medical advances but we should find a solution sooner given the burden of the metabolic disorder―What we need is a collaborative venture that may involve laboratories both in academia and industries for the scientific progress and its application for the diabetes control.

关键词： Diabetes Diabetes mellitus Endocrinology Genes Gut microbiota Environment Insulin signaling Metabolic disorder Mitochondria Obesity

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Estimation of the van Genuchten Soil Water Retention Properties from Soil Textural Data

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Pedosphere 2010年第4期20卷 456-465页

作者： B. GHANBARIAN-alavijeh A. LIAGHAT HUANG Guan-Hua M. Th. VAN GENUCHTEN Department of Irrigation and Reclamation Engineering University of Tehran Karaj 31587-77871 （Iran） Department of Earth and Environmental Sciences Wright State University Dayton OH 45435 （USA） Department of Irrigation and Drainage Engineering China Agricultural University Beijing 100083 （China） Department of Mechanical Engineering Federal University of Rio de Janeiro RJ 21945-970 （Brazil）

The van Genuchten (vG) function is often used to describe the soil water retention curve (SWRC) of unsaturated soils and fractured rock. The objective of this study was to develop a method to determine the vG model parameter m from the fractal dimension. We compared two approaches previously proposed by van Genuchten and Lenhard et al. for estimating m from the pore size distribution index of the Brooks and Corey (BC) model. In both approaches we used a relationship between the pore size distribution index of the BC model and the fractal dimension of the SWRC. A dataset containing 75 samples from the UNSODA unsaturated soil hydraulic database was used to evaluate the two approaches. The statistical parameters showed that the approach by Lenhard et al. provided better estimates of the parameter m. Another dataset containing 72 samples from the literature was used to validate Lenhard's approach in which the SWRC fractal dimension was estimated from the clay content. The estimated SWRC of the second dataset was compared with those obtained with the Rosetta model using sand, silt, and clay contents. Root mean square error values of the proposed fractal approach and Rosetta were 0.081 and 0.136, respectively, indicating that the proposed fractal approach performed better than the Rosetta model.

关键词： fractal dimension soil water retention curve van Genuchten parameterization

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