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Dong W.,CAS Institute of Genetics and Developmental Biology | Duan Y.,Geological Survey of Jiangxi Province | Wang Y.,CAS Institute of Genetics and Developmental Biology | Hu C.,CAS Institute of Genetics and Developmental Biology
Science of the Total Environment | Year: 2016

Soil inorganic carbon (SIC) exerts a strong influence on the carbon (C) sequestered in response to nitrogen (N) additions in arid and semi-arid ecosystems, but limited information is available on in situ SIC storage and dissolution at the field level. This study determined the soil organic/inorganic carbon storage in the soil profile at 0-100 cm depths and the concentration of dissolved inorganic carbon (DIC) in soil leachate in 4 N application treatments (0, 200, 400, and 600 kg N ha-1 yr-1) for 15 years in the North China Plain. The objectives were to evaluate the effect of nitrogen fertilizer on total amount of carbon sequestration and the uptake of atmospheric CO2 in an agricultural system. Results showed that after 15 years of N fertilizer application the SOC contents at depths of 0-100 cm significantly increased, whereas the SIC contents significantly decreased at depths of 0-60 cm. However, the actual measured loss of carbonate was far higher than the theoretical maximum values of dissolution via protons from nitrification. Furthermore, the amount of HCO3 - and the HCO3 - / (Ca2+ + Mg2+) ratio in soil leachate were higher in the N application treatments than no fertilizer input (CK) for the 0-80 cm depth. The result suggested that the dissolution of carbonate was mainly enhanced by soil carbonic acid, a process which can absorb soil or atmosphere CO2 and less influenced by protons through the nitrification which would release CO2. To accurately evaluate soil C sequestration under N input scenarios in semi-arid regions, future studies should include both changes in SIC storage as well as the fractions of dissolution with different sources of acids in soil profiles. © 2016 Elsevier B.V. Source

Ye Z.-H.,Jiangxi Science and Technology Normal University | Ye Z.-H.,Chinese Academy of Geological Sciences | Yin B.,Geological Survey of Jiangxi Province | Liu J.-Q.,CAS Institute of Geology and Geophysics | And 3 more authors.
Acta Geoscientica Sinica | Year: 2014

Mt. Sanqingshan in Jiangxi, with the geological evolutionary history of more than 1 billion years, entered the World Natural Heritage List in July, 2008, and was awarded the name Global Geopark in September, 2012. It is famous for its granite geology and granite peak landform and can be regarded as the natural museum of granite micro-landforms, with global comparison significance. It is called "Mt. Sanqingshan Style" granite landform. In this paper, the development mechanism of the landform was analyzed in four aspects, i.e., tectonic setting, material basis, external forces and change of external forces. It is believed that the structure is the dominant factor for the formation of the "Mt. Sanqingshan Style" granite landform, that A-type granite with high silicon and potassium and low magnesium and calcium is the material basis, that water is an important external dynamic force, and that the cyclical climate change since Quaternary has been one of the important factors for micro-landscape diversity. ©, 2014, Science Press. All right reserved. Source

Ye Z.,Chinese Academy of Geological Sciences | Ye Z.,Jiangxi Science and Technology Normal University | Ye Z.,East China Institute of Technology | Yin B.,Geological Survey of Jiangxi Province | And 3 more authors.
International Geology Review | Year: 2014

Mt Sanqingshan, a global Geopark and world natural heritage site located in Jiangxi Province, China, is famous for its eroded granite peaks. The uplift and denudation history of the area has been reconstructed using fission track methods for the first time. Apatite fission track ages (AFTAs) cluster into three groups at ca. 25 Ma, 45-55 Ma, and 70 Ma. These ages can be related to ancient multilevel denudation planes at about 900, 1200, and 1500 m above sea level, respectively. The apatite data also reveal four cooling stages for the Mt Sanqingshan region, from ca. 90 to 65-60 Ma, 65-60 to 45 Ma, 45 to 20-15 Ma, and 20-15 Ma to the present, with cooling rates of 1.96°C, 1.18°C, 0.37°C, and 3.78°C per million years, respectively, and an average cooling rate of 1.80°C per million years. Calculated uplift rates are 0.055, 0.034, 0.011, and 0.11 mm year1 in the four stages, yielding uplifts of 4140, 570, 290, and 1940 m, respectively. The uplift rate of the last stage was significantly faster than that of the other three preceding stages, reflecting rejuvenation of Mt Sanqingshan, as a result of new tectonism. The average uplift rate at Mt Sanqingshan is 0.053 mm year1, and the average denudation rate is 0.048 mm year1, resulting in 3550 m of uplift and 2540 m of denudation relative to eustatic sea level. The 1010 m difference is very close to the average elevation of about 1000 m at present. A comparison of uplift-denudation histories for Mt Sanqingshan and Mt Huangshan shows that fission track results can be useful for defining geomorphological development stages. © 2014 Taylor & Francis. Source

Zhang C.,Nanjing University | Yu J.,Nanjing University | Yu J.,Macquarie University | O'Reilly S.Y.,Macquarie University | And 7 more authors.
Journal of Metamorphic Geology | Year: 2016

The Cretaceous Yuhuashan igneous complex contains abundant xenoliths of high-grade metamorphic rocks, with the assemblage garnet ± hypersthene + biotite + plagioclase + K-feldspar + quartz. The biotite in these samples has high TiO2 (>3.5%), indicating high-T metamorphism (623-778 °C). P-T calculations for two felsic granulites indicate that the peak metamorphism took place at 880-887 °C and 0.64-0.70 GPa, in the low pressure/high temperature (LP-HT) granulite facies. Phase equilibrium modelling gives equilibrium conditions for the peak assemblage of a felsic granulite of >0.6 GPa and >840 °C, consistent with the P-T calculations, and identifies an anticlockwise P-T-t path. LA-ICPMS U-Pb dating of metamorphic and detrital zircon from one xenolith reveals that the granulite facies metamorphism took place at 273.6 ± 2.2 Ma, and the protolith was a sedimentary rock deposited later than 683 Ma. This represents the first Late Palaeozoic (Variscan) granulite facies event identified in the South China Block (SCB). Coupled with other geological observations, the LP-HT metamorphic conditions and anticlockwise P-T-t path suggest that Variscan metamorphism probably occurred in a post-orogenic or intraplate extensional tectonic setting associated with the input of external heat, related to the underplating of mantle-derived magma. Based on P-T estimates and the comparison of the protolith composition with mid- to low-grade metamorphic rocks in the area, it is suggested that the mid-lower crust under the Xiangshan-Yuhuashan area consists mainly of these felsic granulites and gneisses, whose protoliths were probably subducted to these depths during the Early Palaeozoic orogeny in the SCB, and underwent two episodes of metamorphism during Early Palaeozoic and Late Palaeozoic time. © 2016 John Wiley & Sons Ltd. Source

Ye Z.,East China Institute of Technology | Ye Z.,China University of Geosciences | Cao Y.,East China Institute of Technology | Cao Y.,Shanghai International Studies University | And 3 more authors.
Proceedings - 2012 IEEE Symposium on Robotics and Applications, ISRA 2012 | Year: 2012

Mt. Longhushan, a scenic spot located in Jiangxi Province, China, is famous for its beautiful and characteristic Danxia landform, long-history Taoism and mysterious cliff tomb. In recent years, the tourism resources, especially geological landscape have been developed greatly and tourists increases unprecedentedly. However, the tourism management in Mt. Longhushan still lags behind the development of the new technology, such as management combining with Geographic Information System (GIS). In this study, the application of GIS to the tour management and development is discussed and a tour geographic information system (TGIS) is developed based on MAPGIS. TGIS is a modern management method in tourism geographic information for comprehensive collection, dynamical analysis and application. © 2012 IEEE. Source

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